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Method for synthesizing vinyl acetate

A vinyl acetate, diethylene acetate technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate and other directions, can solve the problems of low vinyl acetate yield, low selectivity, etc., to improve activity and Effects of stability, improved yield and selectivity

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 method for the preparation of vinyl acetate is provided, which has the characteristics of high vinyl acetate yield and high selectivity

Method used

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  • Method for synthesizing vinyl acetate
  • Method for synthesizing vinyl acetate
  • Method for synthesizing vinyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of carbonylation catalyst: the Co containing 9.35gCo, containing 3.20gBe and containing 1.85gAu 2 (CO) 8 , BeCl 2 and NH 4 AuCl 4 2H 2 O is 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 is 170m 2 / g, spherical SiO with a pore volume of 0.97 and a diameter of 5.6mm 2The 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 Co content was 9.35g / L, the Be content was 3.20g / L, and the Au content was 1.85g / L.

[0028] Synthesis of vinyl acetate:

[0029] 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 hydr...

Embodiment 2

[0034] Preparation of carbonylation catalyst: the Co containing 9.35gCo, containing 3.20gBe and containing 1.85gSb 2 (CO) 8 , BeCl 2 and Cl 3 Sb is 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 is 170m 2 / g, spherical SiO with a pore volume of 0.97 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 Co content was 9.35g / L, the Be content was 3.20g / L, and the Sb content was 1.85g / L.

[0035] Synthesis of vinyl acetate:

[0036] 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 t...

Embodiment 3

[0050] Preparation of carbonylation catalyst: Co(OAc) containing 7.00gCo, containing 1.00gMg and containing 1.00gAu 2 4H 2 O, MgSO 4 ·7H 2 O and HAuCl 4 Fully mix and dissolve in pure water to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 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 Co content was 7.00 g / L, the Mg content was 1.00 g / L, and the Au content was 1.00 g / L.

[0051] Synthesis of vinyl acetate:

[0052] 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 8.2MPa, ...

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Abstract

The invention relates to a method for synthesizing vinyl acetate. 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 vinyl acetate synthesis 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, alkaline earth metal and at least one metal element selected from IB and VA. With the technical scheme, the technical problem is well solved. The method can be used in industrial production of vinyl acetate.

Description

technical field [0001] The present invention relates to a process for the synthesis 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 an...

Claims

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Application Information

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IPC IPC(8): C07C69/15C07C67/297C07C67/36C07C69/16B01J31/28B01J23/89B01J23/843B01J23/78
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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