Hydrolysis Of Acetic Anhydride Research Articles

Effects of Catalysts on the Liquid Phase Oxygen Oxidation of Acetaldehyde to Acetic Acid and Acetic Anhydride

The effects of metal catalysts for oxidation of acetaldehyde in ethyl acetate with oxygen to simultaneous formation of acetic acid and acetic anhydride have been investigated. The oxidation activities of the catalysts for acetaldehyde were in order of Co > Mn > Ni > Cr > no catalyst, Fe, Ag, and Cu. The decomposition activities of the catalysts for peracetic acid were in order of Ni, Co > Cr, Mn > Cu, Ag, Fe. and no catalyst. A parallel relation was qualitatively found between the orders of these activities. The activities of catalysts for formation of acetic anhydride were in order of Co > Mn > Ni > Cr; Co > no catalyst.The catalyst of Co with Cu had a maximum oxidation activity when the addition of Cu was 0.075 (atomic ratio of Cu/Co); and, the activity for formation of acetic anhydride was increased proportionally up to the addition of 0.5. The tendency of this efficiency was attributed at least in part to the action of suppressiong of hydrolysis of acetic anhydride by the catalyst in the reacting solution.

Hydrolysis of Acetic Anhydride in Concentrated Acetic Acid without Catalysis

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrolysis of Acetic Anhydride in Concentrated Acetic Acid without CatalysisH. J. Janssen, C. H. Haydel, and L. H. GreathouseCite this: Ind. Eng. Chem. 1957, 49, 2, 197–201Publication Date (Print):February 1, 1957Publication History Published online1 May 2002Published inissue 1 February 1957https://doi.org/10.1021/ie50566a028RIGHTS & PERMISSIONSArticle Views1006Altmetric-Citations8LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (504 KB) Get e-Alerts

Diffusion and reaction in viscous‐flow tubular reactor

AbstractThe effect on point and integral average conversion of chemical reaction, coupled with radial diffusion and radial distribution of reaction times in viscous‐flow tubular reactors, is reported. Solutions are given for first‐order reaction over an extensive range of dimensionless rate and time variables. An expression is given for a criterion of the conditions when the contribution of diffusion is so small that it may safely be disregarded as a variable. Another criterion also is given for the situation when diffusivity is so large, in comparison with other system constants, that the simple plug flow solution may be used without incurring more than a specified error.The hydrolysis of acetic anhydride was studied in 1/4‐ and 1/2‐in.–diam. reactors in 10‐ and 15‐ft. lengths. Reynolds numbers were between 40 and 400 and temperatures between 25° and 35 °C. It was found that the derived equations form a proper description of experiments in the smaller tube. Deviations from theory in the larger tube are explained in terms of free convection arising from nonisothermal conditions and from concentration gradients in the tube. Grashof criteria for initiation of convection in the system are discussed.

Simplified Rapid Technic for the Extraction and Determination of Serum Cholesterol without Saponification

Abstract An accurate yet simple procedure for the determination of total cholesterol, based upon the application of a Liebermann-Burchard color reaction directly in the solvent employed for extraction of cholesterol from serum, has been described. Extraction of cholesterol and removal of protein are accomplished by means of acetic acid and acetic anhydride. Serum water is removed by the acid-catalyzed hydrolysis of acetic anhydride. The Liebermann-Burchard color is then developed with a stable, modified reagent consisting of equal volumes of H2SO4 and acetic acid. Excellent agreement with the technic of Schoenheimer and Sperry is obtained. Equal intensities of color are produced by equivalent concentrations of free and esterified cholesterol. Preliminary saponification of cholesterol esters is therefore not required. Color development may proceed in ordinary room lighting without loss of accuracy.

The hydrolysis of acetic anhydride. Part IV. Catalysis by hydrochloric acid and the hydrolysis of acetyl chloride

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The hydrolysis of acetic anhydride. Part V. Catalysis by strong acids

The first page of this article is displayed as the abstract.

The hydrolysis of acetic anhydride at elevated temperatures in the presence of ethyl acetate

The hydrolysis of acetic anhydride at elevated temperatures in the presence of ethyl acetate

289. The hydrolysis of acetic anhydride. Part III. The catalytic efficiency of a series of tertiary amines

289. The hydrolysis of acetic anhydride. Part III. The catalytic efficiency of a series of tertiary amines

288. The hydrolysis of acetic anhydride. Part II. Catalysis by pyridine

288. The hydrolysis of acetic anhydride. Part II. Catalysis by pyridine

THE HYDROLYSIS OF ACETIC ANHYDRIDE IN WATER AND IN THE SYSTEM WATER: METHYL ETHYL KETONE

The rate of hydrolysis of acetic anhydride at 25 °C. in water (I), in solutions of methyl ethyl ketone (MEK) in water (II), and in solutions of water in MEK (III) have been studied. In I the observation of previous investigators that the velocity constant varies linearly with the initial concentration of acetic anhydride, but for any given initial concentration of acetic anhydride the reaction is pseudomonomolecular, was confirmed and extended. In II the velocity constant is lower than in I and decreases linearly with increasing concentration of MEK, but, again, the reaction is pseudomonomolecular for any given initial concentration of acetic anhydride. An equation and a nomogram that relate the velocity constant to the initial concentration of acetic anhydride, MEK, and water are presented. In III the second-order rate equation must be modified to compensate for the presumed catalytic effect of the hydrogen ion produced by hydrolysis.

The hydrolysis of acetic anhydride

The hydrolysis of acetic anhydride