Neutralization of solvent vapors of brand 650 by the adsorption‑catalytic method

The purpose of this work is to study the process of neutralization of vapors of a mixed solvent of the brand 650 by the adsorption‑catalytic method. The essence of the method consists in the concentration of solvent components on the sorbent, thermal desorption followed by periodic flameless catalytic oxidation of accumulated organic substances to carbon dioxide and water. Synthetic zeolite of the NaX brand was used as a sorbent, and a porous material based on foam ceramics of the Al2O3/SiO2 composition with a highly developed modified surface with an active catalytic phase was used as a catalyst. The mixed solvent contains, xylenes, ethylcellosol, n‑butanol. It is shown that the value of the sorption volume of zeolite for each class of the considered compounds is influenced by certain factors: the length and structure of the carbon skeleton, the position of the hydroxyl group (for alcohols and esters), the number of methyl groups in the composition of molecules (for the production of benzene). The conversion rate of the mixed solvent components was 65.4–90.1 %.

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Neutralization of solvent vapors of brand 646 by the adsorption-catalytic method

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) ◽

10.21122/1683-6065-2021-1-130-136 ◽

2021 ◽

pp. 130-136

Author(s):

A. S. Panasyugin ◽

N. P. Masherova ◽

A. R. Tsyganov ◽

N. D. Pavlovsky

Keyword(s):

Mixed Solvent ◽

Synthetic Zeolite ◽

Hydroxyl Group ◽

Methyl Groups ◽

Organic Substances ◽

Benzene Derivatives ◽

Foam Material ◽

Catalytic Method ◽

Sorption Volume ◽

Solvent Vapors

The aim of the paper is investigation of neutralization of solvent vapors of the brand 646 by an adsorption-catalytic method. The adsorption-catalytic method includes the following stages: adsorption of the solvent components by adsorbent, thermal desorption and periodic flameless catalytic oxidation of organic substances to carbon dioxide and water. Synthetic zeolite of the NaX brand was used as a sorbent, catalyst was porous Al2O3/SiO2 ceramic foam material with an active catalytic phase. Solvent contains aceton, toluene, butylacetate, ethanol, ethyl cellosolve, n-butanol. It is shown that the value of the sorption volume of zeolite for each class of compounds depends on the certain factors: the length and structure of the carbon skeleton, the position of the hydroxyl group (for alcohols and esters), number of methyl groups in the molecules (for benzene derivatives). The conversion of the mixed solvent components was 65.4–90.1 %.

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A new non-azole inhibitor of ABA 8′-hydroxylase: Effect of the hydroxyl group substituted for geminal methyl groups in the six-membered ring

Bioorganic & Medicinal Chemistry Letters ◽

10.1016/j.bmcl.2006.03.024 ◽

2006 ◽

Vol 16 (12) ◽

pp. 3302-3305 ◽

Cited By ~ 15

Author(s):

Yoshiharu Araki ◽

Arisa Miyawaki ◽

Tomoyuki Miyashita ◽

Masaharu Mizutani ◽

Nobuhiro Hirai ◽

...

Keyword(s):

Membered Ring ◽

Hydroxyl Group ◽

Methyl Groups

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The Reactions nd resistance of Fishes to Carbon Dioxide and Carbon Monoxide

Illinois Natural History Survey Bulletin ◽

10.21900/j.inhs.v11.365 ◽

1918 ◽

Vol 11 (1-10) ◽

pp. 557-571

Author(s):

Morris Wells

Keyword(s):

Carbon Dioxide ◽

Carbon Monoxide ◽

Fresh Water ◽

Natural Waters ◽

Aquatic Organisms ◽

Toxic Action ◽

Organic Substances ◽

The Many

Carbon monoxide and carbon dioxide are both present in the waste that is diverted into natural waters by many works where illuminating gas is manufactured and, since the waste as a whole is known to be exceedingly poisonous to aquatic organisms, the role played in its toxic action by the two gases in question was investigated at the time that the many other organic substances of which the waste is composed were studied by Shelford. The investigation has shown that both of the gases are poisonous to fresh-water fishes even when present in the water in relatively small proportions, but the monoxide has been found to be by far the more deadly of the two.

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Partition coefficients of organic substances in two-phase mixtures of water and carbon dioxide at pressures of 8 to 30 MPa and temperatures of 313 to 333 K

The Journal of Supercritical Fluids ◽

10.1016/s0896-8446(96)90025-x ◽

1996 ◽

Vol 9 (3) ◽

pp. 146-151 ◽

Cited By ~ 30

Author(s):

Karlheinz Brudi ◽

Nicolaus Dahmen ◽

Helmut Schmieder

Keyword(s):

Carbon Dioxide ◽

Partition Coefficients ◽

Organic Substances ◽

Two Phase

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THE ANAEROBIC DISSIMILATION OF D-GLUCOSE-1-C14, D-ARABINOSE-1-C14, AND L-ARABINOSE-1-C14 BY AEROBACTER AEROGENES

Canadian Journal of Biochemistry and Physiology ◽

10.1139/y54-016 ◽

1954 ◽

Vol 32 (1) ◽

pp. 147-153 ◽

Cited By ~ 6

Author(s):

A. C. Neish ◽

F. J. Simpson

Keyword(s):

Carbon Dioxide ◽

Acetic Acid ◽

Lactic Acid ◽

Carboxyl Groups ◽

Methyl Groups ◽

Carboxyl Group ◽

Complete Conversion ◽

Aerobacter Aerogenes ◽

Methyl Group ◽

Ethanol Acetic Acid

D-Glucose-1-C14, D-arabinose-1-C14, and L-arabinose-1-C14 were dissimilated anaerobically by Aerobacter aerogenes. The major products (2,3-butanediol, ethanol, acetic acid, lactic acid, formic acid, and carbon dioxide) were isolated and the location of C14 determined. The products from glucose were all labeled, mainly in the methyl groups, in agreement with the hypothesis that they were derived from methyl-labeled pyruvate formed by the reactions of the classical Embden–Meyerhof scheme for glycolysis. The products from both pentoses appeared to have been formed from pyruvate labeled in both the methyl and carboxyl groups with twice as much C14 in the methyl group as in the carboxyl group. This result may be explained quantitatively by a hypothesis assuming complete conversion of pentose to triose via a heptulose.

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A New Non-Azole Inhibitor of ABA 8′-Hydroxylase: Effect of the Hydroxyl Group Substituted for Geminal Methyl Groups in the Six-Membered Ring.

ChemInform ◽

10.1002/chin.200638073 ◽

2006 ◽

Vol 37 (38) ◽

Author(s):

Yoshiharu Araki ◽

Arisa Miyawaki ◽

Tomoyuki Miyashita ◽

Masaharu Mizutani ◽

Nobuhiro Hirai ◽

...

Keyword(s):

Membered Ring ◽

Hydroxyl Group ◽

Methyl Groups

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Poly(lactide) Swelling and Melting Behavior in Supercritical Carbon Dioxide and Post-Venting Porous Material

Biomacromolecules ◽

10.1021/bm050101v ◽

2005 ◽

Vol 6 (4) ◽

pp. 2370-2373 ◽

Cited By ~ 27

Author(s):

Tomoko Fujiwara ◽

Tetsuji Yamaoka ◽

Yoshiharu Kimura ◽

Kenneth J. Wynne

Keyword(s):

Carbon Dioxide ◽

Supercritical Carbon Dioxide ◽

Porous Material ◽

Melting Behavior ◽

Supercritical Carbon

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A 51V NMR investigation of the interactions of aqueous vanadate with hydroxylamine

Canadian Journal of Chemistry ◽

10.1139/v97-120 ◽

1997 ◽

Vol 75 (7) ◽

pp. 1002-1010 ◽

Cited By ~ 12

Author(s):

Sarah J. Angus-Dunne ◽

Pradip C. Paul ◽

Alan S. Tracey

Keyword(s):

Chemical Shifts ◽

Formation Constants ◽

Hydroxyl Group ◽

Methyl Groups ◽

Trigonal Bipyramidal ◽

Anionic Complexes ◽

Acidic Conditions ◽

A Charge ◽

Neutral Conditions ◽

Lower Ligand

The aqueous reactions of hydroxylamine and N-methylhydroxylamine with vanadate have been studied. Ligand, vanadium, and proton stoichiometries of the products have been obtained as have their formation constants. At lower ligand concentrations the predominant complex contains a single hydroxamido ligand and this has been assigned a five-coordinate, tetrahedral-like structure where the hydroxamido group is coordinated in a side-on fashion. Four bishydroxamido products were observed. These four complexes consisted of two distinct groups of two isomeric complexes each and have been assigned six-coordinate (tetrahedral-like) and seven-coordinate (trigonal bipyramidal-like) geometries. For the N-methylhydroxamido ligand, 10 bisligand products in 2 groups of 5 isomers each were observed. The additional products over the hydroxylamine situation arise from the relative orientations of the ligand methyl groups. For both ligands, the monoligand products carried a single negative charge and did not have a pKa, within the range of about 6–10. The bisligand products did not carry a charge under neutral conditions. The tetrahedral bisligand products could be protonated under acidic conditions (pKa ~ 6.6) but could not be deprotonated. In contrast, the trigonal bipyramidal products were not protonated under acidic conditions but could give up a proton under basic conditions (pKa ~ 7.4) to form anionic complexes. The relative orientations of the ligands and also the number of methyl groups and their relative orientations in the complex have a significant influence on the 51V chemical shifts. One additional complex was observed to form and was assigned to an ester-like product formed by reaction at the hydroxyl group. Keywords: vanadate, complexes, hydroxylamine, methylhydroxylamine, peroxovanadate.

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