Preparation method of ethyl acetate

A technology of ethyl acetate and silicotungstic acid, which is applied in the field of preparation of ethyl acetate, can solve the problems of unfavorable internal diffusion of heteropolyacids, low catalyst activity, and low yield of ethyl acetate, achieving good selectivity and high activity , good thermal stability

Active Publication Date: 2014-12-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has a catalyst carrier with a smaller pore size, which is not conducive to the internal diffusion of heteropolyacids, resulting in low catalyst activity and low yield of ethyl acetate. A new ethyl acetate is provided. Preparation

Method used

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  • Preparation method of ethyl acetate

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Embodiment 1

[0021] Formed SiO 2 Immersed in 0.01 mol / L Na 2 CO 3 In the solution, the impregnation temperature is 40°C, the impregnation time is 16 hours, and then the impregnated SiO 2 Filter, wash with water until neutral, and dry for later use. Take the Keggin structure silicotungstic acid H 3 SiW1 2 o 40 · x H 2 O20 g was dissolved in 10 ml deionized water. Get the SiO that the above-mentioned alkali handles standby 2 20 grams mixed with the above silicotungstic acid solution, deionized water and SiO 2 The liquid-solid ratio is 0.5 ml / g. In a rotary evaporator, the immersion temperature is 60°C, and the immersion is continuously rotated and immersed for 24 hours; then it is taken out and dried under nitrogen flow for 6 hours at a drying temperature of 120°C; and then under nitrogen flow, 300°C 50 wt% silicotungstic acid / SiO was prepared by firing for 3 hours 2 agent.

[0022] The esterification reaction was carried out using the prepared catalyst. The catalyst was added in...

Embodiment 2～5

[0024] The catalyst was prepared with [Example 1], and the prepared catalyst was used to prepare ethyl acetate. See Table 1 for details.

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Abstract

The invention relates to a preparation method of ethyl acetate, and aims to mainly solve the problems that the smaller pore size of catalyst carriers is not conducive to internal diffusion of heteropoly acid and results in low catalyst activity, and the yield of ethyl acetate is low in the prior art. The method of the invention adopts a technical scheme composed of: taking acetic acid and ethanol as raw materials, and under the conditions of a molar ratio of acetic acid to ethanol of 1:1-1:10, a reaction temperature of 30-150DEG C, a reaction time of 0.5-10 hours, and a catalyst dosage accounting for 0.1-20wt% of the raw materials, contacting the raw materials with the catalyst for reaction to generate ethyl acetate. Specifically, the catalyst comprises the following components by weight: a) 10-50% of silicotungstic heteropoly acid; and b) 50-90% of an SiO2 carrier that is treated by a basic solution with a concentration of 0.001-5 mol / L. The technical scheme of the invention well solves the problems, and can be used in the industrial production of ethyl acetate.

Description

technical field [0001] The present invention relates to a kind of preparation method of ethyl acetate. Background technique [0002] Ethyl acetate is a colorless and transparent liquid with a fruity aroma. It has excellent solubility, volatilization speed and quick drying. It is mainly used in the industry to produce coatings, adhesives, ethyl cellulose, chlorinated rubber, The production of vinyl resin, cellulose acetate, cellulose butyl acetate, artificial leather, linoleum colorant and artificial pearl, etc., used as an extractant for the production of medicine, organic acid products, etc., in addition to the production of fruit flavors and whiskey, Raw material of spices such as butter, used as cleaning agent in textile industry, etc. In recent years, with the sustained and stable growth of the world economy, the rapid development of construction, automobile and other industries, and the increasingly stringent environmental protection regulations, it has become a genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/14C07C67/08B01J23/30
Inventor 杨洪云高焕新金国杰丁琳陈璐康陈军
Owner CHINA PETROLEUM & CHEM CORP
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