Method for producing vinyl acetate through methyl acetate carbonylation

A technology of methyl acetate and vinyl acetate, applied in the field of vinyl acetate carbonylation of methyl acetate, can solve the problems of low vinyl acetate yield and low selectivity, and achieve improved activity and stability, increased yield and selectivity Effect

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

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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 pr

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] [Example 1]

[0026] Preparation of carbonylation catalyst: the rhodium acetate di-ligand (Rh) containing 6.10gRh, 2.90gSr and 2.90gSn 2 (OAc) 4 ), Sr(OAc) 2 ·0.5H 2 O and stannous oxalate (SnC 2 O 4 ) Fully mix and dissolve in hydrochloric acid with a concentration of 8wt% to obtain 400ml of immersion liquid. The 1.0L specific surface is 165m 2 / g, spherical SiO with a pore volume of 0.95 and a diameter of 5.6mm 2 The carrier is immersed in the above-mentioned impregnating solution, and left standing for 2 hours to dry at 100°C to obtain the catalyst. According to ICP analysis of the carbonylation catalyst, the Rh content is 6.10 g / L, the Sr content is 2.90 g / L, and the Sn content is 2.90 g / L.

[0027] Synthesis of vinyl acetate:

[0028] 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 vent the air in the kettle with argon and then pressurize to 2.0MPa, then...

Example Embodiment

[0032] [Example 2]

[0033] Preparation of carbonylation catalyst: the rhodium acetate di-ligand (Rh) containing 6.10gRh, 2.90gSr and 2.90gLa 2 (OAc) 4 ), Sr(OAc) 2 ·0.5H 2 O and La (OAc) 3 ·5H 2 O is thoroughly mixed and dissolved in pure water to obtain 400ml of immersion liquid. The 1.0L specific surface is 165m 2 / g, spherical SiO with a pore volume of 0.95 and a diameter of 5.6mm 2 The carrier is immersed in the above-mentioned impregnating solution, and is allowed to stand for 2 hours to dry at 100° C. to obtain the catalyst. According to the ICP analysis of the carbonylation catalyst, the Rh content was 6.10 g / L, the Sr content was 2.90 g / L, and the La content was 2.90 g / L.

[0034] Synthesis of vinyl acetate:

[0035] 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 vent the air in the kettle with argon and then pressurize to 2.0MPa, then Feed carbon monoxid...

Example Embodiment

[0048] [Example 3]

[0049] Preparation of carbonylation catalyst: RhCl containing 5.00g Rh, 1.00gBa and 1.00gGe 3 ·6H 2 O, BaCl 2 And GeCl 4 Mix thoroughly and dissolve it in hydrochloric acid with a concentration of 8wt% to obtain 400ml of immersion liquid. The 1.0L specific surface is 150m 2 / g, spherical Al with a pore volume of 0.90 and a diameter of 5.6mm 2 O 3 The carrier is immersed in the above-mentioned impregnating solution, and left standing for 2 hours to dry at 80°C to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the content of Rh was 5.00 g / L, the content of Ba was 1.00 g / L, and the content of Ge was 1.00 g / L.

[0050] Synthesis of vinyl acetate:

[0051] 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 vent the air in the kettle with argon and then pressurize to 2.0MPa, then Feed carbon monoxide and hydrogen until the pres...

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Abstract

The invention relates to a method for producing 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 platinum-group elements, at least one selected from alkaline earth metals and at least one metal element selected from IVA and lanthanide-series metal elements. 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 producing vinyl acetate by carbonylation 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 aceta...

Claims

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Application Information

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IPC IPC(8): C07C69/15C07C67/297B01J23/63B01J23/62
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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