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Method for synthesizing vinyl acetate through methyl acetate carbonylation

A technology of methyl acetate and vinyl acetate, which is applied in the field of carbonylation of methyl acetate to synthesize vinyl acetate, can solve the problems of low vinyl acetate yield and low selectivity, and improve activity and stability, yield and selectivity 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 yield of vinyl acetate and low selectivity, and a new method for carbonylation of methyl acetate to synthesize vinyl acetate is provided, which has the advantages of high vinyl acetate yield and high selectivity features

Method used

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  • Method for synthesizing vinyl acetate through methyl acetate carbonylation
  • Method for synthesizing vinyl acetate through methyl acetate carbonylation
  • Method for synthesizing vinyl acetate through methyl acetate carbonylation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of carbonylation catalyst: CoCl containing 8.50 g Co, 3.20 g B and 2.90 g Au 2 ·6H 2 O, ammonium pentaborate ((NH 4 )B 5 O 8 ·8H 2 O) and NH 4 AuCl 4 ·2H 2O is thoroughly mixed and dissolved in pure water to obtain 400ml of immersion liquid, and the specific surface of 1.0L is 165m 2 / g, spherical SiO with a pore volume of 0.95 and a diameter of 5.6 mm 2 The carrier was immersed in the above-mentioned dipping solution, and dried at 100° C. for 2 hours to obtain the catalyst. The carbonylation catalyst was analyzed by ICP and ICP-MS, and the Co content was 8.50 g / L, the B content was 3.20 g / L, and the Au content was 2.90 g / L.

[0030] Synthesis of vinyl acetate:

[0031] Step (1): add 1.5mol acetic acid, 0.05mol carbonylation catalyst, 0.10mol methyl iodide and 0.45mol methyl acetate into the 500ml titanium material reaction kettle, discharge the air in the kettle with argon first and then pressurize to 2.0MPa, then Feed carbon monoxide and hydroge...

Embodiment 2

[0036] Preparation of carbonylation catalyst: CoCl containing 8.50 g Co, 3.20 g B and 2.90 g Sr 2 ·6H 2 O, ammonium pentaborate ((NH 4 )B 5 O 8 ·8H 2 O) and Sr(OAc) 2 ·0.5H 2 O is thoroughly mixed and dissolved in pure water to obtain 400ml of immersion liquid, and the specific surface of 1.0L is 165m 2 / g, spherical SiO with a pore volume of 0.95 and a diameter of 5.6 mm 2 The carrier was immersed in the above-mentioned dipping solution, and dried at 100° C. for 2 hours to obtain the catalyst. The carbonylation catalyst was analyzed by ICP and ICP-MS, and the Co content was 8.50 g / L, the B content was 3.20 g / L, and the Sr content was 2.90 g / L.

[0037] Synthesis of vinyl acetate:

[0038] Step (1): add 1.5mol acetic acid, 0.05mol carbonylation catalyst, 0.10mol methyl iodide and 0.45mol methyl acetate into the 500ml titanium material reaction kettle, discharge the air in the kettle with argon first and then pressurize to 2.0MPa, then Feed carbon monoxide and hydroge...

Embodiment 3

[0052] Preparation of carbonylation catalyst: NiCl containing 7.00 g Ni, 1.00 g B and 1.00 g Cu 2 ·6H 2 O, boric acid (H 3 BO 3 ) 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 immersion 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 5.6 mm 2 O 3 The carrier was immersed in the above-mentioned dipping solution, and dried at 80° C. for 2 hours 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 Cu content was 1.00 g / L.

[0053] Synthesis of vinyl acetate:

[0054] Step (1): add 1.5mol acetic acid, 0.05mol carbonylation catalyst, 0.10mol methyl iodide and 0.45mol methyl acetate into the 500ml titanium material reaction kettle, first discharge the air in the kettle with argon and pressurize to 2.0MPa, then Feed c...

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Abstract

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.

Description

technical field [0001] The invention relates to a method for synthesizing vinyl acetate by carbonylation of methyl 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 ethereal fragrance. It is one of the largest organic chemical raw materials in the world and is widely used in the production of polyvinyl acetate (PVAc), polyvinyl alcohol, coatings, slurries, adhesives, vinylon, films, vinyl copolymer resins, acetal resins And a series of chemical and chemical fiber products, widely used in all walks of life. [0003] The production of vinyl acetate both at home and abroad adopts the ethylene gas phase method and the acetylene gas phase method, which belong to the petrochemical process route. A new process for preparing vinyl acetate from methanol and synthesis gas, the carbonyl method to synthesize vinyl acetate, is proposed. The process does not r...

Claims

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Application Information

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IPC IPC(8): C07C69/15C07C67/297C07C67/36C07C69/16B01J31/28B01J23/89B01J23/78B01J23/755B01J23/843B01J27/057
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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