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Process for the production of vinyl acetate

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

Active Publication Date: 2017-09-15
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 producing vinyl acetate is provided, which has the characteristics of high vinyl acetate yield and high selectivity

Method used

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  • Process for the production of vinyl acetate
  • Process for the production of vinyl acetate
  • Process for the production of vinyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of carbonylation catalyst: NiCl containing 9.30g Ni, 2.90gCe and 2.85gCu 2 ·6H 2 O, CeCl 3 ·6H 2 O and copper tartrate (C 4 h 4 o 6 Cu·XH 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 164m 2 / g, spherical SiO with a pore volume of 0.93 and a diameter of 5.6 mm 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 Ni content was 9.30g / L, the Ce content was 2.90g / L, and the Cu content was 2.85g / 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 monoxide ...

Embodiment 2

[0035] Preparation of carbonylation catalyst: NiCl containing 9.30g Ni, 2.90gCe and 2.85gCs 2 ·6H 2 O, CeCl 3 ·6H 2 O and CsOAc are fully mixed and dissolved in pure water to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 164m 2 / g, spherical SiO with a pore volume of 0.93 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 Ni content was 9.30g / L, the Ce content was 2.90g / L, and the Cs content was 2.85g / 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 7.8MPa, increase the stirring spe...

Embodiment 3

[0051] Preparation of carbonylation catalyst: Ni(NO 3 ) 2 ·6H 2 O, La(OAc) 3 ·5H 2 O and CuCl 2 2H 2 O is fully mixed and dissolved 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 Ni content was 7.00 g / L, the La 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 2.0MPa, then Introduce carbon monoxide and hydrogen until the pressure is 7.8MPa, increase the stirring speed to 1200rpm, st...

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Abstract

The invention relates to a method for production of vinyl acetate, and is mainly to solve the problem 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 method for production of 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 comprises at least one selected from the group consisting of iron series elements, lanthanum series elements, and at least one metal element selected from the group consisting of group-IB and alkali metals; thus, the above-mentioned technical problem is well solved, and the method can be applied in industrial production of vinyl acetate.

Description

technical field [0001] The present invention relates to a process for the production of vinyl acetate. Background technique [0002] Vinyl acetate, namely vinyl acetate (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 me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/15C07C67/28C07C67/00B01J23/83B01J23/89B01J32/00B01J35/10
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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