Month: April 2022

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid( cas:560-09-8 ) is researched.HPLC of Formula: 560-09-8.Rahman, Mohammad Arifur; Hopke, Philip K. published the article 《Mechanistic Pathway of Carbon Monoxide Off-Gassing from Wood Pellets》 about this compound( cas:560-09-8 ) in Energy & Fuels. Keywords: mechanistic pathway carbon monoxide off gassing wood pellet storage. Let’s learn more about this compound (cas:560-09-8).

The off-gassing of carbon monoxide (CO) from stored wood pellets was identified as a significant problem, potentially resulting in adverse occupational and residential exposures. The mechanism for the production of CO from wood pellets was not fully identified. A multiple step process was hypothesized. The reaction is initiated by the autoxidation of unsaturated compounds, including fatty acids and terpenes, by mol. oxygen. As a byproduct of these reactions, hydroxyl radicals are formed. Then, the bulk of CO results from the reactions of hemicellulose and hydroxyl radicals. To understand the mechanistic pathway of CO off-gassing, a number of experiments were conducted in which CO was measured and evolved organic compounds were analyzed using gas chromatog.-mass spectrometry (GC-MS). These studies identified a number of short- and long-chain aldehydes from the evolved gases that indicates the autoxidation mechanism. However, there is insufficient mass of these unsaturated compounds in wood to support the observed mass of off-gassed CO. However, autoxidation would form hydroxyl radicals. The role of hydroxyl radicals was studied using a radical scavenger, and its role in CO production was confirmed. Thus, if the autoxidation initiation can be eliminated, then CO off-gassing from pellets would be substantially reduced. Destruction of the reactive compounds with ozone led to a suppression of CO formation, suggesting an approach to process the wood fiber that would result in low or no CO emission wood pellets.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Effects of milling of starting hydrated aluminum sulfate on η → α phase transformation and sinterability of alumina, published in 1986-02-01, which mentions a compound: 17927-65-0, Name is Aluminum(III) sulfate xhydrate, Molecular Al2H8O13S3, Reference of Aluminum(III) sulfate xhydrate.

The effects of milling of the precursor, Al2(SO4)3 (14-18)H2O, on η → α phase transformation and sinterability of α-Al2O3 were studied. Milling of the hydrated sulfate lowered the temperatures of dehydration, desulfation, and η → α phase transformation by about 30°, 20°, and 100°, resp. Dehydration of hydrated sulfate produced broken-eggshell-like anhydrous sulfate particles through melting of the hydrate in its water of crystallization On heating, the milled hydrated sulfate converted to anhydrous particles composed of finer sulfate particles. The anhydrous sulfate desulfated into aggregate grains of η-Al2O3 with an irregular pore size distribution. This η-Al2O3, finally formed skeletal grains of α-Al2O3 in which many cracks were produced. The optimum calcination temperature to prepare α-Al2O3 powder for sintering was lowered and the sinterability was improved by the milling treatment. The slope of Avrami-plots for η → α phase transformation indicated a 2-dimensional growth of α-Al2O3. The apparent activation energy for the transformation was 110 kcal/mol, which remained unchanged with milling. The enhancement of η → α phase transformation was due to accelerated nucleation in η-Al2O3 grains, and the sinterability of the α-Al2O3 was improved by an increase in the d. of green compacts, resulting from the occurrence of many cracks in the skeletal grains of α-Al2O3.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Daimon, Keiji; Kato, Etsuro published an article about the compound: Aluminum(III) sulfate xhydrate( cas:17927-65-0,SMILESS:O=S(O)(O)=O.O=S(O)(O)=O.O=S(O)(O)=O.[H]O[H].[Al].[Al] ).Synthetic Route of Al2H8O13S3. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:17927-65-0) through the article.

The effects of milling of the precursor, Al2(SO4)3 (14-18)H2O, on η → α phase transformation and sinterability of α-Al2O3 were studied. Milling of the hydrated sulfate lowered the temperatures of dehydration, desulfation, and η → α phase transformation by about 30°, 20°, and 100°, resp. Dehydration of hydrated sulfate produced broken-eggshell-like anhydrous sulfate particles through melting of the hydrate in its water of crystallization On heating, the milled hydrated sulfate converted to anhydrous particles composed of finer sulfate particles. The anhydrous sulfate desulfated into aggregate grains of η-Al2O3 with an irregular pore size distribution. This η-Al2O3, finally formed skeletal grains of α-Al2O3 in which many cracks were produced. The optimum calcination temperature to prepare α-Al2O3 powder for sintering was lowered and the sinterability was improved by the milling treatment. The slope of Avrami-plots for η → α phase transformation indicated a 2-dimensional growth of α-Al2O3. The apparent activation energy for the transformation was 110 kcal/mol, which remained unchanged with milling. The enhancement of η → α phase transformation was due to accelerated nucleation in η-Al2O3 grains, and the sinterability of the α-Al2O3 was improved by an increase in the d. of green compacts, resulting from the occurrence of many cracks in the skeletal grains of α-Al2O3.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Camphane derivatives. VII. Syntheses and structure of 3-methyl-3aβ,7aβ-bornano[3,2-d]oxazolidin-2-one and its derivatives》. Authors are Hamashima, Yoshio; Tori, Kazuo; Takamizawa, Akira.The article about the compound:(1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acidcas:560-09-8,SMILESS:CC1(C)[C@@H](CC[C@]1(C)C(O)=O)C(O)=O).Product Details of 560-09-8. Through the article, more information about this compound (cas:560-09-8) is conveyed.

cf. CA 62, 4055b. In connection with the elucidation of the structure of I and II, obtained by the reaction of 3α-methylaminocamphor (III) with COCl2, 3-methyl-3aβ,7aβ-(IV) and 3aα,7α-bornano[3,2-d]oxazolidin-2-one (V) and their derivatives were synthesized and studied stereochem. Their N.M.R. spectra were also investigated (tabulated and discussed). Excess COCl2 in C6H6 added dropwise with stirring to a boiling suspension of 10 g. III.HCl in dry C6H6 until dissolution gave 7 g. VI, m. 82° (Et2O-hexane), [α]25D 142° (CHCl3), showing a pos. Cotton effect on optical rotatory dispersion (ORD), 0.36 g. II, m. 193° (MeOH-Et2O), [α]25D 127.7° (CHCl3), showing a pos. Cotton effect on ORD, and 0.3 g. unchanged III.HCl. The resinous oil obtained on concentration redissolved in C6H6, the solution washed with 10% aqueous Na2CO3, dried, and concentrated, the oily residue kept several days (HCl evolved), the resulting solid extracted with Et2O, and the Et2O-soluble fraction washed with dilute aqueous Na2CO3, chromatographed on neutral Al2O3, and eluted with Et2O gave 5 g. I, m. 82° (Et2O-hexane), [α]25D -22° (CHCl3), showing a neg. plain curve on ORD; the product eluted with MeOH and the Et2O-insoluble solid combined and recrystallized from MeOH gave 0.40 g. II. VI (0.2 g.) refluxed 2 hrs. with 5 ml. 25% MeOH-HCl gave 0.092 g. I and 0.046 g. VII, m. 122°. VI(0.5 g.) refluxed 5 hrs. with 3 ml. SOCl2 gave 0.35 g. I, m. 82°. (VII,R=Me); (IX,R=Et); (X,R=Ac); (XI,R=Bz); A suspension of I in 4 ml. 2% HCl heated 30 min. at 80° on a steam bath until CO2 evolution ceased and the resulting solution concentrated to dryness gave 15 mg. III.HCl, m. 238° (decomposition). ClCO2Me (1 mole) added dropwise to 2 moles III in Et2O with stirring and ice cooling and the mixture stirred 1 hr. at room temperature, gave VIII, b1, 130-40°, m. 53-4°. A mixture of 100 mg. I and 200 mg. KOH in 10 ml. MeOH refluxed 10 hrs. gave VIII, b1 135°, m. 50°. I (480 mg.) in 5 ml. MeOH containing 500 mg. Na heated 30 min. at 70° gave 400 mg. VIII, b1, 130-40°. I (1 g.) in 15 ml. 30% MeOH-HCl refluxed 10 hrs. gave 0.6 g. VII, m. 122°. I (1 mole) in C5H5N heated 2 hrs. at 70° with 1.2 moles AgNO3 in MeOH also gave VII, m. 122°. I (1 g.) refluxed with 25% EtOH-HCl and worked up like VII gave 0.9 g. IX, b0.07 145°. Both VII and IX were easily hydrolyzed to III by concentrated HCl. A mixture of 2.44 g. I and 2 g. AgOAc in AcOH refluxed 8 hrs. gave 2.1 g. X, m. 107° (hexane), showing a plain neg. curve on ORD. I (240 g.) mixed with 230 mg. AgOBz and 2 g. BzOH, and the mixture heated 10 hrs. at 150-60° and cooled, and the product isolated by extraction with C6H6 gave 200 mg. XI, m. 153-4°, [α]23D -47.2° (CHCl3). Acid hydrolysis of both X and XI led to III, no other products or intermediates being obtained. I (100 mg.) in 10 ml. MeOH containing 200 mg. KOH hydrogenated over 100 mg. 10% Pd-C at room temperature and atm. pressure with stirring (9 ml. H absorbed during 1 hr.) gave 60 mg. IV, m. 119° (Et2O), [α]28D 108.2° (CHCl3), showing a pos. plain curve on ORD. IV was also obtained in fairly good yield by hydrogenation with Raney Ni in alk. medium. 3α-Aminoborneol (XII) (300 mg.) and 3 ml. 98% HCO2H heated 6 hrs. at 110° gave 150 mg. XIII, m. 143° (EtOH). XII (100 mg.) and 100 mg. HCONH2 heated 10 min. at 120° gave 100 mg. XIII, m. 143°. (XII,R=H); (XIII,R=CHO); (XIV,R=Me); (XVIII,R=Cl); (XIX,R=OH); (XXII,R=OAc); (XXIII,R=OMe); XIII (300 mg.) in tetrahydrofuran (THF) added dropwise to 200 mg. LiAlF4 in THF with ice water cooling and the mixture refluxed and stirred 4 hrs. gave 200 mg. XIV, m. 85-6° (hexane). III (3 g.) in Et2O added to 300 mg. LiAlH4 in Et2O and the mixture stirred 2 hrs. at room temperature gave 1.0 g. XIV, m. 85° (hexane). To a mixture of 500 mg. XIV, 10 ml. C6H6, and 10 ml. 10% aqueous Na2CO3 was added 20% C6H6COCl2 with stirring until the organic layer became clear (the mixture was kept alk. throughout the reaction) gave 510 mg. IV, m. 119° (Et2O), [α]26D 108° (CHCl3), IV (10 mg.) refluxed 6 hrs. with 2 ml. MeOH containing 200 mg. KOH gave 6 mg. XIV, m. 80-2°. XIV (200 mg.) and 2 ml. CS2 in 15 ml. EtOH refluxed until no more H2S was evolved (15 hrs.) (during the reaction addnl. CS2 was added) gave 120 mg. XV, m. 206° (MeOH). A suspension of 120 mg. XV and 500 mg. Raney Ni (WII) in EtOH stirred 3 hrs. at room temperature and kept overnight gave 50 mg. XIV, m. 80-2°. To 100 mg. XV in 1 ml. AcOH was added dropwise 35% H2O2 until no more turbidity occurred and the mixture let stand 2 hrs. at room temperature to give IV, m. 119°. 3α-Aminoisoborneol (200 mg.) and 1 ml. 98% HCO2H refluxed 5 hrs. gave 150 mg. 3α-formamido analog, m. 162° (Me2CO-Et2O), which (480 mg.) reduced with LiAlH4 in Et2O gave 300 mg. 3α-methylaminoisoborneol (XVI), m. 66-7° (Et2O-hexane) (HCl salt m. >310°). II (70 mg.) treated with 2 ml. C5H5N and 1 ml. Ac2O under ice water cooling and the solution kept ∼1 week at room temperature gave 60 mg. XVII, m. 120.5° (Et2O), [α]30D 150.3°, showing a pos. plain curve on ORD. XVII on hydrolysis with NaOH or HCl gave II. II(100 mg.) and 2 ml. SOCl2 refluxed 20 hrs. until gas evolution ceased gave 100 mg. XVIII, m. 132° (Et2O-hexane), [α]28D -21.5° (CHCl3), showing a pos. plain curve on ORD. II (100 mg.) and 500 mg. PCl5 in 2 ml. POCl3 refluxed 20 hrs. gave 80 mg. XVIII, m. 130-1°. XVIII (400 mg.) suspended in 10 ml. 10% HCl heated 15 hrs. at 100° gave quant. XIX, m. 254° (decomposition) (MeOH-Et2O), [α]24D 13.3° (CHCl3), showing a pos. plain curve on ORD. XVIII (260 mg.) in 10 ml. MeOH containing 620 mg. KOH heated 4 hrs. at 75° and kept overnight at room temperature gave 100 mg. camphor-quinone (XX), m. 190-5°, and 100 mg. XIX. XIX (130 mg.) in 3 ml. absolute MeOH containing 200 mg. Na kept 1 week at room temperature gave 40 mg. D-camphoric acid (XXI), m. 187° (Et2O-hexane), [α]25D 46.1° (EtOH), and a small amount XX. XXI (10 mg.) heated 4 hrs. at 140° with 10 mg. ZnCl2 and 500 mg. Ac2O gave 3 mg. camphoric anhydride, m. 220°. XIX (50 mg.) in 10 ml. MeOH containing 50 mg. KOH hydrogenated over 100 mg. Raney Ni at room temperature and atm. pressure with stirring (6 ml. H absorbed, during 1 hr.) gave 37 mg. II, m. 188-90°. Zn (600 mg.) added to 130 mg. XIX in 6 ml. AcOH at 100° with stirring, after 2 hrs. 600 mg. Zn added, and the mixture heated and stirred 2 hrs. gave 20 mg. unchanged XIX, and 45 mg. II, m. 190-2°. XVIII (40 mg.), 60 mg. AgOAc; and 1 ml. C5H5N in 1 ml. AcOH heated 3 hrs. at 100° gave 25 mg. XXII, m. 84-5° (Et2O-hexane), [α]22D 67.2° (CHCl3), showing a pos. plain curve on ORD. To 50 mg. XIX in 5 ml. C5H5N was added 1 ml. Ac2O with cooling and the solution kept 1 week at room temperature to give 50 mg. XXII, m. 84° (Et2O-hexane). Treatment of either XVIII or XIX with excess AgOAc in C5H5N gave XXII. XXII (20 mg.) heated 4 hrs. on a steam bath with 2 ml. 10% HCl gave XIX, m. 254° (decomposition) (Et2O). XIX (50 mg.) and 2 ml. SOCl2 refluxed 20 hrs. gave XVIII, m. 132° (Et2O-hexane). A mixture of 40 mg. XVIII, 60 mg. AgNO3; 2 ml. C5H5N, and 2 ml. MeOH heated 1.5 hrs. on a steam bath until no further precipitation of solid occurred gave XXIII, b0.05 110-20°, m. 76-8° (hexane), showing a small pos. plain curve on ORD. XVIII (20 mg.) in 2 ml. 25% MeOH-HCl heated 5 hrs. gave 12 mg. XXIII, b0.05 115°. XXIII (50 mg.) in MeOH hydrogenated over 100 mg. Raney Ni at room temperature and atm. pressure (1 mol. equivalent H was absorbed) gave XXIV, b0.15 120-30°, m. 48-50°. To 260 mg. XIX in AcOD (prepared from 10 ml. Ac2O and 3 ml. D2O) was added 1 g. Zn at 110° with stirring, after 1.5 hrs. 1.5 g. Zn added, and the mixture heated 4.5 hrs. to give XXV, m. 192-3°. XVIII (100 mg.) in 10 ml. MeOH containing 200 mg. KOH hydrogenated over 100 mg. 10% Pd-C at room temperature and atm. pressure (2 mol. equivalents H absorbed in 15 min.) gave 60 mg. IV, m. 119° (Et2O-hexane), and 13 mg. XIV, m. 84-5°. XVIII (55 mg.) in 10 ml. MeOH containing 100 mg. KOH hydrogenated over 200 mg. Raney Ni at room temperature and atm. pressure (2 mot. equivalents H absorbed in 15 min.) gave 28 mg. V, m. 123° (Et2O), [α]27D -33.3° (CHCl3), showing a neg. plain curve on ORD. The N.M.R. spectral evidence confirmed the assignment of the configurations of most of the compounds prepared Pertinent ir data were given and the N.M.R. spectra of IV and V recorded.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Product Details of 17927-65-0. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Raman microscopy study of basic aluminum sulfate. Author is Kloprogge, J. T.; Frost, R. L..

The tridecameric Al Keggin cluster [AlO4Al12(OH)24(H2O)12]7+ was prepared by forced hydrolysis of Al3+ up to an OH/Al molar ratio of 2.2. Upon addition of sulfate the tridecamer crystallized as the monoclinic basic aluminum sulfate Na0.1[AlO4Al12(OH)24(H2O)12](SO4)3.55. These crystals were studied using FT-Raman microscopy and compared to basic aluminum nitrate, Na2SO4.xH2O and Al2(SO4)3.xH2O. The Raman spectrum of basic aluminum sulfate is dominated by two broad bands which are assigned to the ν1 and ν3 bands at 981 and 1051 cm-1 of the sulfate group in the Al13 sulfate structure. Also the band at 724 cm-1 is assigned to an Al-O mode of the polymerized Al-O-Al bonds in the Al13 Keggin structure. The sharp band at 1066 cm-1 and the minor band at 1384 cm-1 are interpreted as a small amount of nitrate impurity on a different position in the structure than the nitrate present in the Al13 nitrate crystal structure, based on the shift in band position of both the ν1 sym. stretching and ν3 asym. stretching modes.

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Isothiazole – Wikipedia,
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Computed Properties of Al2H8O13S3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Effect of shear schedule on particle size, density, and structure during flocculation in stirred tanks. Author is Spicer, Patrick T.; Pratsinis, Sotiris E.; Raper, Judy; Amal, Rose; Bushell, Graeme; Meesters, Gabrie.

The effect of shear history on the evolution of the polystyrene-alum floc size, d., and structure is investigated by small-angle light scattering during cycled-shear and tapered-shear flocculation in a stirred tank using a Rushton impeller. First, various sampling schemes are exptl. evaluated. The floc structure is characterized by the mass fractal dimension, Df, and the relative floc d. During turbulent shear flocculation, small floc structures are shown to be more open (Df=2.1) than larger floc structures (Df=2.5) as a result of shear-induced restructuring during steady state attainment. Flocs produced by cycled-shear flocculation are grown at shear rate G=50 s-1 for 30 min, are fragmented at Gb=100, 300, or 500 s-1 for one minute, and then are regrown at G=50 s-1. This shear schedule decreases the floc size but compacts the floc structure. When flocs are produced by gradual reduction of the shear rate from G=300 to 50 s-1 (tapered-shear flocculation), smaller though equally dense flocs are produced compared with cycled-shear flocculation. The cycled-shear flocculation method produces the largest flocs with the highest potential for sedimentation when the fragmentation shear rate is Gb=300 s-1.

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Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Electric Literature of Al2H8O13S3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Synthesis of hexagonal plate-like α-alumina crystals by using hydrated aluminum sulfate as the starting material. Author is Daimon, Keiji; Kato, Etsuro.

Hexagonal plate-like α-Al2O3 crystal was prepared by dehydration of Al2(SO4)3.14-18 H2O (I) at 300° for 24 h or at 200° under reduced pressure, followed by the formation of η-Al2O3, by heating the anhydrous Al2(SO4)3 at 900° for 4 h and finally by mixing with 25% weight AlF3 and heating in Pt tube at 900-1200°. The particle size distribution of α-Al2O3 was wider for the I dehydrated at 200° under reduced pressure than for the I which was dehydrated by evaporation after it was dissolved in water. The particle size of α-Al2O3 obtained by 900° heat-treatment was greater than that obtained by 1100° heat-treatment.

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Isothiazole – Wikipedia,
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Quality Control of Aluminum(III) sulfate xhydrate. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Synthesis of hexagonal plate-like α-alumina crystals by using hydrated aluminum sulfate as the starting material. Author is Daimon, Keiji; Kato, Etsuro.

Hexagonal plate-like α-Al2O3 crystal was prepared by dehydration of Al2(SO4)3.14-18 H2O (I) at 300° for 24 h or at 200° under reduced pressure, followed by the formation of η-Al2O3, by heating the anhydrous Al2(SO4)3 at 900° for 4 h and finally by mixing with 25% weight AlF3 and heating in Pt tube at 900-1200°. The particle size distribution of α-Al2O3 was wider for the I dehydrated at 200° under reduced pressure than for the I which was dehydrated by evaporation after it was dissolved in water. The particle size of α-Al2O3 obtained by 900° heat-treatment was greater than that obtained by 1100° heat-treatment.

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Isothiazole – Wikipedia,
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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 17927-65-0, is researched, Molecular Al2H8O13S3, about The influence of environmental factor on the coagulation enhanced ultrafiltration of algae-laden water: Role of two anionic surfactants to the separation performance, the main research direction is environmental factor coagulation enhanced ultrafiltration algae laden water; algae laden water anionic surfactant separation; Algae-laden water; Anionic surfactant; Coagulation; Fouling mechanism; Ultrafiltration.Name: Aluminum(III) sulfate xhydrate.

With the acceleration of urbanization and the improvement of people′s living standards, more chems. that humans rely on are entering the city and surrounding water bodies. Anionic surfactants are one of the essential products for human beings. It is also one of the inducements that cause the eutrophication. The algae-laden water caused by eutrophication is a headache in the traditional water treatment process. To solve the problem, ultrafitration combined process was widely investigated to treat the algae-laden water. The presence of stimuli, low concentration anionic surfactant, probably interfere the performance of ultrafiltration process during algae-laden water treatment. In this study, the influence of two typical anionic surfactants, sodium dodecyl sulfate (SDS) and sodium dodecyl benzene sulfonate (LAS), on the performance of coagulation-enhanced ultrafiltration was investigated. The aluminum sulfate hydrate and iron sulfate hydrate were resp. employed as coagulant. Based on the residual turbidity and zeta potential, 4 mg/L Al and 8 mg/L Fe were determined as the optimal coagulant dosage. The floc morphol. confirmed that Al-algae flocs with lower fractal dimension (Df) were looser and more porous compared to Fe-algae flocs. More coagulant was depleted by LAS due to the better hydrophobicity of LAS. During the filtration process, LAS caused a larger flux reduction compared with SDS regardless of the coagulant that was used. More organic compounds penetrate into membrane pores and block the pores with the presence of LAS since algal cell aggregation was weakened. Finally, the rejection of organic compounds by the coagulation-enhanced ultrafiltration process was studied, and the co-existing surfactants can cause effluent deterioration. Therefore, the presence of surfactants has a neg. effect to the ultrafiltration treatment of algae-laden water.

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Isothiazole – Wikipedia,
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Application of 17927-65-0. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Solubility and solid phases in the sulfuric acid-sodium sulfate-aluminum sulfate-water system at 50°. Author is Lepeshkov, I. N.; Danilov, V. P.; Selin, A. N.; Kim, V. P.; Zaitseva, L. A.; Gorbacheva, N. N..

Solubility and composition of the solid phases in the H2SO4-Na2SO4-Al2(SO4)3-H2O system were determined for H2SO4 concentrations of 3-12 weight%. Under the given conditions Na2SO4, NaAl(SO4)2.12H2O and Al2(SO4)3.17H2O crystallize.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com