542-10-9Relevant articles and documents
NEW TRANSFORMATIONS OF VINYL ACETATE UNDER THE INFLUENCE OF THE COMPLEX Rh(PPh3)3Cl
Dzhemilev, U. M.,Khusnutdinov, R. I.,Shchadneva, N. A.
, p. 1100 - 1101 (1992)
The strictly regioselective hydrocarboxylation of vinyl acetate to ethylidene diacetate by acetic acid formed in situ from vinyl acetate was realized for the first time with Rh(PPh3)3Cl as catalyst.The transformation of vinyl acetate into benzene, acetophenone, and acetylene was also realized. Keywords: Hydrocarboxylation, vinyl acetate, metal complex catalyst.
Acetic acid methyl ester synthesis method for synthesizing double-acetic acid carbonate
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Paragraph 0047; 0048; 0049, (2017/01/12)
The invention relates to a synthesis method of ethylidene diacetate from methyl acetate, which mainly solves the problems of low conversion rate of methyl acetate and low selectivity of ethylidene diacetate in the prior art. MeOAc, CO and H2 used as raw materials react in the presence of a catalyst by mainly using SOCl2 or SOCl2-sulfolane mixture as a solvent to generate the ethylidene diacetate. The catalyst comprises a main catalyst, a cocatalyst and an accelerator, wherein the main catalyst adopts VIII metals or compounds thereof, the cocatalyst is a halogen-containing compound, and the accelerator is a nitrogen oxygen organic matter or phosphorus-containing compound. The technical scheme well solves the problems, and can be used for producing vinyl acetate.
Method for synthesizing vinyl acetate through methyl acetate carbonylation
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Paragraph 0166; 0167; 0168; 0169; 0170; 0171, (2016/12/16)
The invention relates to a method for synthesizing vinyl acetate through methyl acetate carbonylation. When vinyl acetate is prepared from methyl acetate through the route of carbonylation and cracking, vinyl acetate yield and selectivity are low. The invention mainly aims at solving the problems. The method comprises the following steps: methyl acetate carbonylation is carried out, such that ethylene diacetate is obtained; and ethylene diacetate is cracked, such that vinyl acetate is obtained. A carbonylation catalyst adopts SiO2, Al2O3 or a mixture thereof as a carrier, and has active components comprising at least one selected from iron-series elements, at least one selected from metalloid elements and at least one metal element selected from IB and alkaline earth metals. With the technical scheme, the technical problem is well solved. The method can be used in industrial production of vinyl acetate.
ZSM-5-SO3H as a novel, efficient, and reusable catalyst for the chemoselective synthesis and deprotection of 1,1-diacetates under eco-friendly conditions
Massah, Ahmad Reza,Kalbasi, Roozbeh Javad,Shafiei, Anahita
experimental part, p. 643 - 652 (2012/07/14)
ZSM-5 has been modified as supported sulfuric acid (ZSM-5-SO3H) and introduced for the first time as a mild, convenient, reusable, and heterogeneous catalyst. Various types of aldehydes were efficiently converted to their 1,1-diacetates using a catalytic amount of ZSM-5- SO3H in excellent yields under solvent-free and heterogeneous conditions at room temperature. The deprotection of 1,1-diacetates has also been achieved using this novel catalyst in ethanol. The procedure is operationally simple, environmentally benign, and only a stoichiometric amount of anhydride is used. Springer-Verlag 2011.
Preparation of acetic acid
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Page/Page column 3, (2011/10/19)
The disclosure relates to a process for the preparation of acetic acid. The process comprises reacting a decanter heavy, organic phase of an acetic acid production process with acetic anhydride to convert acetaldehyde in the decanter heavy, organic phase to ethylidene diacetate and separating it from the decanter heavy, organic phase. Ethylidene diacetate can be hydrolyzed to recover acetic acid.
Hydroacetoxylation of olefins with acetic acid genetated in situ from vinyl acetate in the presence of ruthenium complexes
Khusnutdinov,Shchadneva,Khisamova,Dzhemilev
body text, p. 155 - 160 (2011/05/03)
Ruthenium complexes catalyze the decomposition of vinyl acetate releasing the acetic acid and its subsequent addition to linear and cyclic olefins.
Integrated process for the production of vinyl acetate from acetic acid via acetaldehyde
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Page/Page column 10, (2010/07/08)
This invention provides an integrated multistep economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form acetaldehyde. Acetaldehyde so formed can be converted to ethylidene diacetate via reaction with acetic anhydride. In a subsequent step so formed ethylidene diacetate is thermally decomposed to form VAM and acetic acid. Alternatively, acetaldehyde formed in the first step can selectively be reacted with ketene to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and iron supported on silica selectively produces acetaldehyde in a vapor phase at a temperature of about 300° C., which is selectively hydrogenated over platinum supported catalyst to form ethanol and dehydrated over NAFION catalyst to form ethylene at a temperature of about 185° C., which is mixed with molecular oxygen, acetic acid and reacted over a palladium/gold/potassium catalyst supported on titania to form VAM at a temperature of about 150° C. to 170° C.
CARBONYLATION PROCESS
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Page/Page column 9, (2009/10/06)
Disclosed is an improved carbonylation process for the production of carboxylic acids, carboxylic acid esters, and/or carboxylic acid anhydrides wherein a carbonylation feedstock compound selected from one or more organic oxygenates such as alcohols, ethers, and esters is contacted with carbon monoxide in the presence of a carbonylation catalyst and one or more onium compounds. The carbonylation process differs from known carbonylation processes in that a halide compound, other than the onium salt, such as a hydrogen halide (typically, hydrogen iodide) and/or an alkyl halide (typically, methyl iodide), extraneous or exogenous to the carbonylation process is not fed or supplied to the process. The process can be improved by using a bidentate ligand comprising two functional groups selected from tertiary amines and tertiary phosphines, such as 2,2′-bipyridine and diphosphine derivatives.
CARBONYLATION PROCESS
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Page/Page column 8, (2008/06/13)
Disclosed is a carbonylation process for the production of carboxylic acids, carboxylic acid esters and/or carboxylic acid anhydrides wherein a carbonylation feedstock compound selected from one or more organic oxygenates such as alcohols, ethers, and esters is contacted with carbon monoxide in the presence of a carbonylation catalyst and one or more onium compounds. The carbonylation process differs from known carbonylation processes in that a halide compound such as a hydrogen halide, typically hydrogen iodide, and/or alkyl halide, typically methyl iodide, extraneous or exogenous to the carbonylation process is not fed or supplied separately to the process.
An efficient method for the synthesis of acylals from aldehydes using silica-supported perchloric acid (HClO4-SiO2)
Kamble, Vinod T.,Jamode, Vasant S.,Joshi, Neeta S.,Biradar, Ankush V.,Deshmukh, Rameshchandra Y.
, p. 5573 - 5576 (2007/10/03)
The synthesis of acylals from structurally diverse aldehydes has been performed in excellent yields under solvent-free conditions using HClO4-SiO2 as a mild, convenient, reusable, and heterogeneous catalyst. The procedure is operationally simple, environmentally benign and has the advantage of enhanced atom utilization. Furthermore, the catalyst can be recovered simply and reused efficiently a number of times without appreciable loss of activity.
