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Method of producing vinyl acetate from methyl acetate through hydroformylation

A technology of methyl acetate and vinyl acetate, applied in the field of methyl acetate hydroformylation to produce vinyl acetate, can solve the problems of low vinyl acetate yield and low selectivity, and achieve improved activity and stability, increased yield and selective effect

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 producing vinyl acetate by hydroformylation of methyl acetate is provided, which has the advantages of high vinyl acetate yield and low selectivity. high feature

Method used

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  • Method of producing vinyl acetate from methyl acetate through hydroformylation
  • Method of producing vinyl acetate from methyl acetate through hydroformylation
  • Method of producing vinyl acetate from methyl acetate through hydroformylation

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Preparation of carbonylation catalyst: CoCl containing 8.30gCo, 2.80gB and 3.30gZn 2 ·6H 2 O, ammonium pentaborate ((NH 4 )B 5 o 8 ·8H 2 O) and zinc gluconate (C 12 h 22 o 14 Zn 3 ·3H 2 O) fully mixed and dissolved in pure water to obtain 400ml of impregnation solution, and 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 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 ICP-MS, and the Co content was 8.30 g / L, the B content was 2.80 g / L, and the Zn content was 3.30 g / 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 Inject car...

Embodiment 2

[0034] Preparation of carbonylation catalyst: CoCl containing 8.30gCo, 2.80gB and 3.30gRb 2 ·6H 2 O, ammonium pentaborate ((NH 4 )B 5 o 8 ·8H 2 O) and RbOAc are 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 ICP-MS, and the Co content was 8.30 g / L, the B content was 2.80 g / L, and the Rb content was 3.30 g / 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 the p...

Embodiment 3

[0050] Preparation of carbonylation catalyst: NiCl containing 7.00gNi, 1.00gB and 1.00gZn 2 ·6H 2 O, boric acid (H 3 BO 3 ) and zinc citrate (Zn 3 (C 6 h 5 o 7 ) 2 2H 2 O) fully mixed and dissolved in pure water 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 ICP-MS, and the Ni content was 7.00 g / L, the B content was 1.00 g / L, and the Zn 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 h...

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Abstract

The invention relates to a method of producing vinyl acetate from methyl acetate through hydroformylation and mainly solves the problems of low yield and low selectivity of the vinyl acetate when methyl acetate is successively subjected to carbonylation and pyrolysis to prepare the vinyl acetate. The method herein includes the following steps: 1) carbonylating the methyl acetate to obtain ethylidene diacetate; and 2) pyrolyzing the ethylidene diacetate to obtain the vinyl acetate. A carbonylation catalyst includes a carrier being formed from SiO2, Al2O3 or a mixture of them, and an active component including at least one of iron-series elements, at least one element from metalloid elements, and at least one metal element selected from the groups of IIB and alkali metals. The method solves the technical problems well and can be used in industrial production of the vinyl acetate.

Description

technical field [0001] The invention relates to a method for producing vinyl acetate by hydroformylation of methyl 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 ac...

Claims

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Application Information

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IPC IPC(8): C07C69/15C07C67/297C07C67/36C07C69/16B01J31/28B01J23/80B01J23/78B01J23/843B01J27/057
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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