Synthetic method for vinyl acetate

A technology of vinyl acetate and synthesis method, which is applied in the direction of chemical instruments and methods, preparation of carboxylic acid esters, preparation of organic compounds, etc., can solve the problems of low selectivity and low yield of vinyl acetate, so as to improve yield and selectivity properties, enhance activity and stability

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low vinyl acetate yield and low selectivity, and a new synthetic method of vinyl acetate is provided, which has the characteristics of high vinyl acetate yield and high selectivity

Method used

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  • Synthetic method for vinyl acetate
  • Synthetic method for vinyl acetate
  • Synthetic method for vinyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of carbonylation catalyst: RhCl containing 6.20gRh, 3.00gCr and 3.10gCu 3 ·3H 2 O, CrCl 3 ·6H 2 O and copper citrate (Cu 2 C 6 h 4 o7 2.5H 2 O) fully mixed and dissolved in hydrochloric acid with a concentration of 8wt%, to obtain 400ml of impregnation solution, the specific surface of 1.0L was 165m 2 / g, spherical SiO with a pore volume of 0.95 and a diameter of 5.6mm 2 The carrier was immersed in the above impregnating solution, left to stand for 2 hours and dried at 100° C. to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the Rh content was 6.20 g / L, the Cr content was 3.00 g / L, and the Cu content was 3.10 g / L.

[0029] Synthesis of vinyl acetate:

[0030] Step (1): Add 1.5 mol of acetic acid, 0.05 mol of carbonylation catalyst, 0.10 mol of methyl iodide and 0.45 mol of methyl acetate into a 500ml titanium reactor, first use argon to discharge the air in the reactor and pressurize to 2.0MPa, then Introduce carbon monox...

Embodiment 2

[0035] Preparation of carbonylation catalyst: RhCl containing 6.20gRh, 3.00gCr and 3.10gLa 3 ·3H 2 O, CrCl 3 ·6H 2 O and La(OAc) 3 ·5H 2 O is fully mixed and dissolved in pure water to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 165m 2 / g, spherical SiO with a pore volume of 0.95 and a diameter of 5.6mm 2 The carrier was immersed in the above impregnating solution, left to stand for 2 hours and dried at 100° C. to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the Rh content was 6.20 g / L, the Cr content was 3.00 g / L, and the La content was 3.10 g / L.

[0036] Synthesis of vinyl acetate:

[0037] Step (1): Add 1.5 mol of acetic acid, 0.05 mol of carbonylation catalyst, 0.10 mol of methyl iodide and 0.45 mol of methyl acetate into a 500ml titanium reactor, first use argon to discharge the air in the reactor and pressurize to 2.0MPa, then Introduce carbon monoxide and hydrogen until the pressure is 7.2MPa, increase t...

Embodiment 3

[0051] The preparation of carbonylation catalyst: will contain 5.00gRh, contain 1.00gCr and contain 1.00gCu triphenylphosphine rhodium chloride (C 54 h 45 ClP 3 Rh), Cr(NO 3 ) 3 9H 2 O and CuCl 2 Fully mixed and dissolved in acetic acid with a concentration of 10wt%, to obtain 400ml of impregnation solution, and the specific surface of 1.0L was 150m 2 / g, spherical Al with a pore volume of 0.90 and a diameter of 5.6mm 2 o 3 The carrier was immersed in the above impregnating solution, left to stand for 2 hours and dried at 80° C. to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the Rh content was 5.00 g / L, the Cr content was 1.00 g / L, and the Cu content was 1.00 g / L.

[0052] Synthesis of vinyl acetate:

[0053] Step (1): Add 1.5 mol of acetic acid, 0.05 mol of carbonylation catalyst, 0.10 mol of methyl iodide and 0.45 mol of methyl acetate into a 500ml titanium reactor, first use argon to discharge the air in the reactor and pressurize to 2....

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Abstract

The invention relates to a synthetic method for vinyl acetate and is mainly to solve the problems of low yield and selectivity of vinyl acetate in preparation for vinyl acetate from methyl acetate successively through carbonylation and cracking routes. According to a technical scheme of the invention, the synthetic method for vinyl acetate comprises the following steps: subjecting methyl acetate to carbonylation so as to obtain ethylidene diacetate, and subjecting ethylidene diacetate to cracking so as to obtain vinyl acetate, wherein a carbonylation catalyst uses SiO2, Al2O3 or a mixture of SiO2 and Al2O3 as a carrier; an active component is at least one selected from the group consisting of platinum-cluster metals, at least one selected from the group consisting of group-VIB metals, and at least one selected from the group consisting of group-IB metals and lanthanide series metals; thus, the above-mentioned technical problems are well solved, and the synthetic method can be applied in industrial production of vinyl acetate.

Description

technical field [0001] The present invention relates to the synthetic method of vinyl acetate. Background technique [0002] Vinyl acetate (vinylacetate, VAC or VAM for short), is a colorless, transparent, flammable liquid at room temperature with a sweet ether fragrance. It is one of the most productive organic chemical raw materials in the world, widely used in the production of polyvinyl acetate (PVAc), polyvinyl alcohol, coatings, pastes, adhesives, vinylon, films, vinyl copolymer resins, acetal resins A series of chemical and chemical fiber products are widely used in various industries. [0003] The production of vinyl acetate adopts ethylene gas-phase method and acetylene gas-phase method both at home and abroad, which belong to the petrochemical process route. Since the rise of C1 chemistry, in the 1980s, the American Halcon (Halcon) company and the British Petroleum (BP) company successively A new process for the production of vinyl acetate from methanol and synth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/15C07C67/297B01J23/652B01J23/68B01J23/89
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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