Diethylene acetate method vinyl acetate catalyst and vinyl acetate synthesis method

A technology of diethylene acetate and method vinyl acetate, which is applied in the field of diethylene acetate method vinyl acetate catalyst and vinyl acetate synthesis, can solve the problems of low conversion rate of diethylene acetate and low selectivity of vinyl acetate, etc. achieve the effect of increasing the conversion rate

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention will solve is that one of the problems in the prior art is that in the synthesis of vinyl acetate prepared by cracking diethylene acetate, the conversion rate of diethylene acetate is low and the selectivity of vinyl acetate is not high, and a new double diacetate is provided. Ethylene acetate method vinyl acetate catalyst, the catalyst is used in the synthesis reaction of diethylene acetate cracking to prepare vinyl acetate, which has the characteristics of high conversion rate and high selectivity of diacetate

Method used

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  • Diethylene acetate method vinyl acetate catalyst and vinyl acetate synthesis method
  • Diethylene acetate method vinyl acetate catalyst and vinyl acetate synthesis method

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Experimental program
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Effect test

Embodiment 1

[0017] Preparation of catalysts containing hydrogen ions and metal cation exchange resins: Weigh 180 g of H-type macroporous cation exchange resins containing 0.4 mol of hydrogen ions after drying at 60° C. and put them into a beaker. 2+ The resin in the beaker was impregnated with 220ml of magnesium acetate solution, stirred for 3 hours, and then dried at 60°C for 24 hours to obtain an exchange resin containing Mg. Then use H-type cation exchange resin and Mg-containing exchange resin to mix to obtain the catalyst (X) containing hydrogen and Mg-containing cation exchange resin. The obtained resin is calculated by X-fluorescence analysis. The number of moles of sulfur is 0.4mol, and the number of moles of Mg It is 0.07mol, calculated p=35%, q=65%.

[0018] The synthesis of vinyl acetate: 9.5g (X), 0.8mol acetic anhydride, 0.2mol diethylene acetate (that is, the molar ratio of solvent to diacetate is 4, the catalyst accounts for the total weight percentage of diacetate and solv...

Embodiment 2

[0054] Preparation of catalysts containing hydrogen ions and metal cation exchange resins: Weigh 180 g of H-type macroporous cation exchange resins containing 0.4 mol of hydrogen ions after drying at 60° C. 3+ The resin in the beaker was impregnated with 220ml of ferric acetate solution, stirred for 3 hours, and then dried at 60°C for 24 hours to obtain an exchange resin containing Fe. Then mix the H-type cation exchange resin with the Fe-containing exchange resin to obtain the catalyst (X) containing hydrogen and Fe-containing cation exchange resin, and the obtained resin is calculated by X-fluorescence analysis. The mole number of sulfur is 0.4mol, and the mole number of Fe is It is 0.1mol, calculated p=75%, q=25%.

[0055] The synthesis of vinyl acetate: 9.5g (X), 0.8mol acetic anhydride, 0.2mol diethylene acetate (that is, the molar ratio of solvent to diacetate is 4, the catalyst accounts for the total weight percentage of diacetate and solvent 8.6%) into a 1-liter react...

Embodiment 3

[0059] Preparation of catalysts containing hydrogen ions and metal cation exchange resins: Weigh 180 g of H-type macroporous cation exchange resins containing 0.4 mol of hydrogen ions after drying at 60° C. 3+ The resin in the beaker was impregnated with 220ml of ferric acetate solution, stirred for 3 hours, and then dried at 60°C for 24 hours to obtain an exchange resin containing Fe. Then mix the H-type cation exchange resin with the Fe-containing exchange resin to obtain the catalyst (X) containing hydrogen and Fe-containing cation exchange resin, and the obtained resin is calculated by X-fluorescence analysis. The mole number of sulfur is 0.4mol, and the mole number of Fe is It is 0.1mol, calculated p=75%, q=25%.

[0060] The synthesis of vinyl acetate: 2.6g (X), 0.2mol acetic anhydride, 0.2mol diethylene acetate (that is, the molar ratio of solvent to diacetate is 1, the catalyst accounts for the total weight percentage of diacetate and solvent 5.2%) into a 1-liter react...

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Abstract

The invention relates to an ethylidene diacetate method vinyl acetate catalyst and a vinyl acetate synthesis method, which are mainly used for solving the problems of low ethylidene diacetate conversion rate and poor vinyl acetate selectivity in the prior part. The problems are well solved through the adoption of the technical scheme that the catalyst is cation exchange resin which contains H+ and metal ions, wherein the metal ions are selected from at least one of alkaline-earth metal ions and transition metal ions, the metal ions accounts for a percentage p (20%-80%) of cation sites in the cation exchange resin, and H+ accounts for a percentage q (1 minus p) of the cation sites. The catalyst can be used in production of vinyl acetate.

Description

technical field [0001] The invention relates to a vinyl acetate catalyst of the diethylene acetate method and a synthesis method of vinyl acetate. Background technique [0002] Vinyl acetate, namely vinyl acetate, is widely used in organic synthesis, mainly for the synthesis of vinylon, and also for chemical reagents in the adhesive and coating industries. [0003] The production of vinyl acetate adopts ethylene method and acetylene method at home and abroad, which belongs to the petrochemical process route. Since the rise of C1 chemistry, in the 1980s, American Halcon and British Petroleum (BP) successively proposed the A new process for the production of vinyl acetate from methanol and synthesis gas. The process does not rely on petrochemical raw materials, but through the carbonylation reaction of methyl acetate and synthesis gas to synthesize the intermediate diethylene acetate (EDDA), and then produce vinyl acetate and acetic acid through thermal cracking. [0004] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/08C07C69/15C07C67/297
Inventor 查晓钟杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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