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

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

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) ◽

10.21122/1683-6065-2021-4-28-32 ◽

2021 ◽

pp. 28-32

Author(s):

A. S. Panasyugin ◽

N. D. Pavlovskiy ◽

N. P. Masherova ◽

A. R. Tsyganov ◽

I. I. Kurilo

Keyword(s):

Carbon Dioxide ◽

Porous Material ◽

Mixed Solvent ◽

Synthetic Zeolite ◽

Hydroxyl Group ◽

Methyl Groups ◽

Organic Substances ◽

Catalytic Method ◽

Modified Surface ◽

Sorption Volume

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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Morphology Control in Block Copolymer Films Using Mixed Solvent Vapors

ACS Nano ◽

10.1021/nn302641z ◽

2012 ◽

Vol 6 (9) ◽

pp. 8052-8059 ◽

Cited By ~ 156

Author(s):

Kevin W. Gotrik ◽

Adam F. Hannon ◽

Jeong Gon Son ◽

Brent Keller ◽

Alfredo Alexander-Katz ◽

...

Keyword(s):

Block Copolymer ◽

Mixed Solvent ◽

Morphology Control ◽

Copolymer Films ◽

Solvent Vapors

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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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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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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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Structural characteristics of dibromoborylated benzene derivatives

Acta Crystallographica Section C Crystal Structure Communications ◽

10.1107/s0108270112020604 ◽

2012 ◽

Vol 68 (6) ◽

pp. o226-o230 ◽

Cited By ~ 1

Author(s):

Sebastian Popp ◽

Kai Ruth ◽

Hans-Wolfram Lerner ◽

Michael Bolte

Keyword(s):

Crystal Structures ◽

Aromatic Ring ◽

Structural Characteristics ◽

Geometric Parameters ◽

Mirror Plane ◽

Methyl Groups ◽

Benzene Derivatives ◽

Asymmetric Unit ◽

Bond Lengths ◽

Structural Database

The crystal structures of five dibromobenzene derivatives, namely dibromoborylbenzene, C6H5BBr2, (I), 1-dibromoboryl-4-(trimethylsilyl)benzene, C9H13BBr2Si, (II), 4-bromo-1-(dibromoboryl)benzene, C6H4BBr3, (III), dibromo(dimethylamino)(phenyl)borane, C8H12BBr2N, (IV), and dibromo(dimethylsulfanyl)[4-(trimethylsilyl)phenyl]borane, C11H19BBr2SSi, (V), have been determined. Compounds (I)–(IV) crystallize with one molecule in the asymmetric unit, but the molecule of (V) is located on a crystallographic mirror plane, implying twofold disorder of the central aromatic ring, the S atom and one of the methyl groups bonded to the S atom. In (I), (II) and (III), the B atom is three-coordinated, and in (IV) and (V) it is four-coordinated. The geometric parameters of the –BBr2group in these five structures agree well with those of comparable structures retrieved from the Cambridge Structural Database. The C—B and B—Br bond lengths in the molecules with a three-coordinated B atom are significantly shorter than those in the molecules with a four-coordinated B atom. In the compounds with a three-coordinated B atom, the –BBr2group tends to be coplanar with the aromatic ring to which it is attached.

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Preparation of C(18)-empiric 20,29,30-trinorlupane derivatives. 1H, 13C NMR and mass spectra

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19860621 ◽

1986 ◽

Vol 51 (3) ◽

pp. 621-635 ◽

Cited By ~ 2

Author(s):

Václav Křeček ◽

Jiří Protiva ◽

Miloš Buděšínský ◽

Eva Klinotová ◽

Alois Vystrčil

Keyword(s):

Nitrous Acid ◽

Mass Spectra ◽

Nmr Spectra ◽

Chemical Shifts ◽

Allylic Oxidation ◽

Hydroxyl Group ◽

Methyl Groups ◽

Unsaturated Ketone ◽

H Nmr ◽

C Nmr

Reaction of amide I with nitrous acid gave the olefins II, III and IV. On allylic oxidation of olefin IV α,β-unsaturated ketone V is formed from which olefins VIII and IX were prepared by a sequence of further reactions. Addition of hydrogen to the double bond of olefin IV and α,β-unsaturated ketone V takes place on catalytic hydrogenation from the β-side and leads to derivatives with cis-annellated rings D/E. This made the preparation of hydrocarbons VI and VII epimeric on C(18) possible, which represent reference compounds for the study of the effect of substituents on the chemical shifts of the methyl groups and the saturated carbon atoms of 18αH and 18βH-lupane derivatives. The configuration of the hydroxyl group in epimers XI and XII were derived from 1H NMR spectra. Deuteration of olefins III, IV and IX gave deuteriohydrocarbons XVI to XVIII. The 1H, 13C NMR and mass spectra of the substances prepared are discussed.

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The environment of tertiary alcohols from nuclear magnetic resonance spectral shifts on formation of trichloroacetylcarbamates

Canadian Journal of Chemistry ◽

10.1139/v76-030 ◽

1976 ◽

Vol 54 (1) ◽

pp. 189-191 ◽

Cited By ~ 5

Author(s):

David R. Taylor

Keyword(s):

Nuclear Magnetic Resonance ◽

Double Bond ◽

Magnetic Resonance ◽

Allylic Alcohol ◽

Hydroxyl Group ◽

Methyl Groups ◽

Tertiary Alcohols ◽

Spectral Shifts ◽

Nmr Signals ◽

Tertiary Hydroxyl

Reaction of tertiary alcohols with trichloroacetylisocyanate causes a marked downfield shift of the nmr signals of protons β to the hydroxyl group. This can be used to reveal the presence of methyl groups adjacent to a tertiary hydroxyl group and of other β protons which are sufficiently deshielded to be observed. This method has also been used to assign the geometry of the double bond of an allylic alcohol.

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Tunable and rapid self-assembly of block copolymers using mixed solvent vapors

Nanoscale ◽

10.1039/c4nr04726e ◽

2014 ◽

Vol 6 (24) ◽

pp. 15216-15221 ◽

Cited By ~ 18

Author(s):

Woon Ik Park ◽

Sheng Tong ◽

Yuzi Liu ◽

Il Woong Jung ◽

Andreas Roelofs ◽

...

Keyword(s):

Block Copolymers ◽

Interaction Parameter ◽

Self Assembly ◽

Mixed Solvent ◽

Pattern Generation ◽

20 Nm ◽

Solvent Vapors

Pattern generation of well-controlled block copolymers (BCPs) with a high Flory–Huggins interaction parameter (χ) is important for applications in sub-20 nm nanolithography.

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