Showing papers on "Acetone published in 1970"
TL;DR: In this article, the synthesis of d-fructose with acetone in the presence of sulfuric acid gave first 1,2:4,5-di-O-isopropylidene-β-d-fructopyranose.
108 citations
TL;DR: In this paper, the authors described the catalysts for the oxidation of various olefins and some related hydrocarbons over Co3O4MoO3 and SnO2 MoO3 (Co or Sn:Mo = 9:1).
62 citations
TL;DR: The reaction was studied by incubation of fatty acid with S-adenosylmethionine-methyl-14C and isolation of the labeled ester and some methyl ester was formed when phospholipids were added to the incubation mixture, presumably because lipase action liberated fatty acids which could serve as substrates.
58 citations
TL;DR: In this article, the critical water concentrations required for initiating precipitation of cellulose acetate from 20% solutions in acetone, dioxane, acetic acid, triethyl phosphate (TEP), dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) have been determined.
51 citations
TL;DR: In this article, the effects of changes in phenol, hypochlorite and catalyst concentrations on the indophenol blue reaction to determine ammonia-nitrogen, using acetone and sodium nitroprusside as catalysts.
42 citations
TL;DR: The correlation between the absorbance at a fixed wave-length of a betaine dye in an organic solvent and the water content of the same solvent has been investigated and the possibility of determining a trace amount of water in anorganic solvent is demonstrated.
31 citations
TL;DR: Lignin polymers with higher molecular weight (Mw up to 17500 g/mol) were obtained and have potential for applications in bioplastics, adhesives and as polymeric dispersants.
Abstract: The enzymatic oxidative polymerization of five technical lignins with different molecular properties, i.e. Soda Grass/Wheat straw Lignin, Organosolv Hardwood Lignin, Soda Wheat straw Lignin, Alkali pretreated Wheat straw Lignin, and Kraft Softwood was studied. All lignins were previously fractionated by acetone/water 50:50 (v/v) and the laccase-catalyzed polymerization of the low molecular weight fractions (Mw < 4000 g/mol) was carried out in the same solvent system. Reactivity of lignin substrates in laccase-catalyzed reactions was determined by monitoring the oxygen consumption. The oxidation reactions in 50% acetone in water mixture proceed with high rate for all tested lignins. Polymerization products were analyzed by size exclusion chromatography, FT-IR, and (31)P-NMR and evidence of important lignin modifications after incubation with laccase. Lignin polymers with higher molecular weight (Mw up to 17500 g/mol) were obtained. The obtained polymers have potential for applications in bioplastics, adhesives and as polymeric dispersants.
27 citations
25 citations
TL;DR: In this article, a head space gas sampling procedure is described for an accurate (standard deviation ± 1.6%) and simple micro-method for the gas Chromatographic determination of acetone.
23 citations
TL;DR: The surface tension of methanol, acetone, dimethylformamide, Dimethylsulfoxide, and methylamine over limited temperature ranges, and of solutions of alkali halides in the first three of these liqu...
Abstract: The surface tensions of methanol, acetone, dimethylformamide, dimethylsulfoxide, and methylamine over limited temperature ranges, and of solutions of alkali halides in the first three of these liqu...
22 citations
Patent•
23 Dec 1970TL;DR: In this paper, a process for preparing MICROPOROUS OPEN-CELLED CELLULAR POLYMERIC STRUCTures is described, in which the starting point of the starting of the polygonal solver in a MIXTURE COMPRISENT and a COSOLVENT SELECTED from METHANOL, ETHANOL and T-BUTANOL.
Abstract: A PROCESS FOR PREPARING MICROPOROUS OPEN-CELLED CELLULAR POLYMERIC STRUCTURES WHICH COMPRISES (A) DISSOLVING THE STARTING POLYMER IN A MIXTURE COMPRISING CHLOROFLUOROCARBON SOLVENT AND A COSOLVENT SELECTED FROM METHANOL, ETHANOL, ISOPROPANOL, T-BUTANOL, DIMETHYLFORMAMIDE, DIMETHYLACETAMIDE, DIOXANE, TRIOXANE, DIMETHYLSULFOXIDE, TETRAHYDROFURAN, ACETONE, METHYLETHYL KETONE, HEXAMETHYL PHOAPHORAMIDE, ACETIC ACID, BUTYROLACTONE, N-METHYLPYRROLIDONE, PYRIDINE, MORPHOLINE, METHYL CELLOSOLVE, ETHYL CELLOSOLVE, PROPYL CELLOSOLVE AND A MIXTURE OF ANY OF SAID COSOLVENTS TO FORM A POLYMER SOLUTION; (B) ADDING WATER IN THE AMOUNT OF AT LEAST 10 VOLUME PERCENT OF THE POLYMER SOLUTION THERETO AT A TEMPERATURE BELOW THE ATMOSPHERIC BOILING POINT OF THE SOLVENTS BUT GREATER THAN 0*C.; (C) SEPARATING THE RESULTANT POLYMERCHLOROFLUOROCARBON PHASE; AND (D) REMOVING THE CHLOROFLUOROCARBON FROM THE SEPARATED POLYMER-CHLOROFLUOROCARBON PHASE.
TL;DR: In this article, various substituted benz[f]isoquinolines were readily prepared by the condensation of ethyl cyanoacetate and salicylaldehyde with aliphatic ketones.
Abstract: Various substituted benz[f]isoquinolines were readily prepared by the condensation of ethyl cyanoacetate and salicylaldehyde or 3-methoxysalicylaldehyde with aliphatic ketones (acetone, diethyl ketone, methyl pentyl ketone, methyl isopentyl ketone, etc.) or aromatic ketones (acetophenone, o-hydroxyacetophenone, m-nitroacetophenone, propiophenone, etc.) in the presence of ammonium acetate. On the other hand, condensation with cyclic ketones such as cyclopentanone and cyclohexanone gave benz[f]cyclopent[c]isoquinolines and benzo[k]phenanthridines respectively.
TL;DR: The studies strongly indicate the significant contribution made by hydrophobic bonding to these interactions and the major role of the water structure in aqueous dioxane mixtures.
Patent•
17 Feb 1970
TL;DR: In this paper, the authors show that the tendency of a 93 to 100% ALCOHOLyZed POLYVINYL ALCOOL are reduced by heating at a temperature of 70 to 190*C.
Abstract: THE COLD WATER SOLUBLES CONTENT AND/OR THE COLD WATER IMBIBING TENDENCY OF A 93 TO 100% ALCOHOLYZED POLYVINYL ALCOHOL ARE REDUCED BY HEATING AT A TEMPERATURE OF 70 TO 190*C. PREFERABLY 90 TO 150*C., A DISPERSION OF THE POLYVINYL ALCOHOL IN A LIQUID SOLVENT COMPRISING 30 TO 100% METHANOL, 0 TO 13% WATER AND 0 TO 45% OF A 2-5 CARBON MONOHYDRIC ALCOHOL, METHYL ACETATE, ACETONE, ETHYLENE GLYCOL DIMETHYL ETHER, TOLUENE, METHYLENE CHLORIDE, OR THE LIKE. SUCH HEAT TREATMENT IMPROVES THE COLD WATER SLURRYING PROPERTIES OF THE POLYVINYL ALCOHOL AND INCREASES THE ROOM TEMPERATURE WATER RESISTANCE OF COATINGS AND FILMS PREPARED FROM THE POLYVINYL ALCOHOL.
TL;DR: The first three solvents extracted 6% more neutral oil and over 100% more lipophilic phosphorus than the latter three as mentioned in this paper, each of which showed similar rates of extraction, each removed over 70% of extractables with the first of four passes.
Abstract: Flaked cottonseed was extracted with chloroform-methanol-water, chloroform-methanol, hexane-acetone-water, hexane-acetone, hexane and acetone. Amounts of total material in the miscellae were greatest with chloroform-methanol-water and decreased to acetone in the order given above. The first three solvents extracted 6% more neutral oil and over 100% more lipophilic phosphorus than the latter three solvents. All solvents showed similar rates of extraction, each removed over 70% of extractables with the first of four passes.
TL;DR: In this article, the radiation-induced oxidation of 2-propanol by hydrogen peroxide in neutral deaerated aqueous solution was investigated, and 2-Propanol was oxidized to acetone, and hydrogen was reduced in s...
Abstract: The radiation-induced oxidation of 2-propanol by hydrogen peroxide in neutral deaerated aqueous solution has been investigated. 2-Propanol is oxidized to acetone, and hydrogen peroxide reduced in s...
TL;DR: In this paper, a mechanism for the formation of the products, and analytical evidence, obtained over a wide range of mixture composition, suggests that acetone is formed through the (CH 3 ) 2 CCH 2 (OOH)CH 2 OO radical.
TL;DR: The results presented in this communication show that, in the presence of acetone, the photo-oxidation of Met to Met0 also occurs under anaerobic conditions, and the method is highly selective and can be usefully applied for probing the positions of the Met residues in the three-dimensional structure of proteins.
TL;DR: In this paper, the metal behavior on DEAE-cellulose was investigated in binary solvent systems consisting of hydrochloric acid and an organic solvent, such as methanol, n-butanol, acetone, tetrahydrofuran, acetic acid and cyclohexanone.
TL;DR: In this paper, the quantum yields of formation were measured and the variation of yield with concentration and temperature studied, and the results were partly confirmed by some qualitative studies of the interaction of thermally produced radicals.
Abstract: Seven products (table 1) were isolated from the reaction at 313 nm of which only four have been reported previously. The quantum yields of formation were measured and the variation of yield with concentration and temperature studied. Addition of samarium chloride and piperylene quenched the formation of some products. From their behaviour the products fall into three groups : (a) the addition compounds, (b) dicyclohexene and (c) isopropanol.
Isopropanol and part of the dicyclohexene are formed as a result of hydrogen abstraction by triplet acetone from cyclohexene. The addition products are formed by rearrangement of an intermediate complex of triplet acetone and cyclohexene rather than by free radical reactions as suggested previously. The results are partly confirmed by some qualitative studies of the interaction of thermally produced radicals. The quantum efficiency for the formation of triplet acetone is approximately one. Ratios of the rate constants for reaction to deactivation of the triplet state have been determined.
TL;DR: In this article, it was shown that in the region 280-400°C oxidation of methyl propionate, unlike that of methyl ethyl ketone, did not accelerate to give a cool flame after a long induction period.
Patent•
24 Feb 1970
TL;DR: In this article, the use of initator activators in the POLYMERIZATION of an ETHYLENICALLY UNSTURATED MONOMER CAPABLE of being polymerIZed by HYDROGEN PEROXIDE and ORGANIC HYROPEROXIDE CATALYSTs in a MUTUAL SOLVENT POLYmerization system is discussed.
Abstract: DISCLOSES THE USE OF INITATOR ACTIVATORS IN THE POLYMERIZATION OF AN ETHYLENICALLY UNSTURATED MONOMER CAPABLE OF BEING POLYMERIZED BY HYDROGEN PEROXIDE AND ORGANIC HYROPEROXIDE CATALYSTS IN A MUTUAL SOLVENT POLYMERIZATION SYSTEM, MUTUAL SOLVENTS BEING LOWER ALCOHOLS, ACETONE, METHYL ETHYL KETONE, DIOXANE AND TETRAHYDROFURAN, THE INIATOR ACTIVATORS BEING SOLUBEL IN THE NON-AQUEOUS MUTUAL SOLVENT BY AT LEAST 2% AND BEING A CHLORIDE, BROMIDE, NITRATE, THIOCYANATE OR SULFATE SALT OF MAGNESIUM, LITHIUM, CALCIUM, ZINC, POTASSIUM, STRONTIUM, AMMONIA, QUATERNARY AMMONIA, AND HYDROCHLORIC AND HYDROBROMIC ACID SALTS OF PRIMARY, SECONDARY AND TERTIARY AMINES.
TL;DR: The saturation vapor pressures of ten mixtures of the binary systems (1) acetone - chloroform, (2)acetone - carbon tetrachloride, and (3) benzene -carbon tetracetone) have been determined.
Abstract: The saturation vapor pressures of ten mixtures of the binary systems (1) acetone – chloroform, (2) acetone – carbon tetrachloride, and (3) benzene – carbon tetrachloride have been determined, from ...
Patent•
16 Sep 1970
TL;DR: Propylene oxide may be efficiently separated from contaminants present in the propylene/oxygen reaction effluent by adding a liquid boiling between 35*C and 100*C, which is not reactive with propylene oxide, to the mixture and distilling the resulting mixture as mentioned in this paper.
Abstract: Propylene oxide may be efficiently separated from contaminants present in the propylene/oxygen reaction effluent by adding a liquid boiling between 35*C and 100*C, which is not reactive with propylene oxide, to the reaction effluent and distilling propylene oxide from the resulting mixture. Propylene oxide is useful for the production of petroleum demulsifiers, surface active materials, urethane polyols and propylene glycols.
TL;DR: In this paper, the thin-layer chromatographic behavior of 48 metals was investigated on a weakly basic anion exchanger, DEAE-cellulose, in binary solvent mixtures consisting of HSCN (0.1 to 2.1 M) and an organic solvent such as methanol, acetic acid, acetone, dioxane, etc.
TL;DR: The first-order rate constants for the aquation of cis-dichlorobis(ethylenediamine)cobalt(III), cis-[Co(en)2Cl2]+, in water were determined in this article.
Abstract: First-order rate constants for the aquation of cis-dichlorobis(ethylenediamine)cobalt(III), cis-[Co(en)2Cl2]+, in water–methanol, –ethanol, –acetone, –dioxan, –formic acid, and –acetic acid mixtures have been determined. The logarithms of these rate constants correlate linearly with the Grunwald–Winstein solvent Y values.
TL;DR: In this article, the 2,4-dinitrophenylhydrazones of long carbon chain produced in beef fat heated at 200°C in air were also examined, and hexanal, heptanal and octanal were tentatively identified by gas-liquid chromatography.
Abstract: Volatile carbonyl compounds produced in beef fat heated at 150°C in nitrogen were investigated. Ethanal, propanal, isobutanal, isopentanal, crotonal, benzaldehyde, acetone, methyl ethyl ketone, methyl isobutyl ketone, glyoxal, and pyruvaldehyde were isolated as their 2,4-dinitrophenylhydrazones and identified by means of thin layer chromatography, infrared, mass and proton magnetic resonance spectroscopy. These carbonyls were considered to be contained also in the volatiles from beef fat heated in air from the results of thin layer chromatography.Volatile carbonyl compounds of longer carbon chain produced in beef fat heated at 200°C in air were also examined, and hexanal, heptanal, 2-heptenal, octanal, 2-octenal, nonanal, 2-nonenal, 2-decenal, 2,4-decadienal and 2-undecenal were tentatively identified by gas-liquid chromatography. The amount of long-chain carbonyls was larger and the oily odor in beef aroma was stronger in beef fat heated in air than in nitrogen.