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A kind of method for preparing ethanol by hydrogenation of acetate

A technology for hydrogenation of acetate and acetate, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of low catalytic activity, deactivation, easy sintering, etc., and achieve high catalytic activity, Effects of not easy sintering and high reaction temperature

Active Publication Date: 2017-07-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the Raney copper catalyst is easily sintered and deactivated during the preparation process, so the catalytic activity is not high

Method used

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  • A kind of method for preparing ethanol by hydrogenation of acetate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 56.4g of metal copper powder, 44.4g of metal aluminum powder, and 5.6g of metal magnesium powder, and place them in a tubular atmosphere furnace for calcination under a nitrogen atmosphere. The reaction temperature is 650°C and kept for 3 hours. After the reaction is completed, cool naturally to room temperature to obtain copper-aluminum alloy.

[0022] (2) After the copper-aluminum alloy is crushed into an alloy block of about 2-3 mm, it is slowly added in batches to 20% sodium hydroxide solution, and the activation time is 2 hours. The catalyst treated by the above steps is washed with 1000 mL of deionized water at 20-40° C. for 20-40 times until the pH value of the washing solution is 7-9.

Embodiment 2

[0024] (1) Weigh 56.4g of metallic copper powder, 44.4g of metallic aluminum powder, and 6.8g of metallic cobalt powder, and place them in a tube-type atmosphere furnace for calcination under a nitrogen atmosphere. The reaction temperature is 650°C and kept for 3 hours. After the reaction is completed, cool naturally to room temperature to obtain copper-aluminum alloy.

[0025] (2) After the copper-aluminum alloy is crushed into an alloy block of about 2-3 mm, it is slowly added in batches to 20% sodium hydroxide solution, and the activation time is 2 hours. The catalyst treated by the above steps is washed with 1000 mL of deionized water at 20-40° C. for 20-40 times until the pH value of the washing solution is 7-9.

Embodiment 3

[0036] Embodiment 3 acetate hydrogenation reaction test

[0037] Pack 40mL of catalyst into a fixed-bed reactor, and use hydrogen to dry the catalyst at 150°C before feeding. The reaction conditions are: the reaction temperature is 250°C, the reaction pressure is 3.0MPa, and the liquid space velocity of acetate is 0.25 to 0.5 h -1 , and the composition of the product was detected by gas chromatography. The test results are listed in Table 1.

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Abstract

The present invention discloses a method for preparing ethanol through hydrogenation of acetate. The method is characterized in that in the presence of hydrogen, acetate contacts a Raney copper catalyst to prepare ethanol a reaction temperature of 100-300 DEG C under a reaction pressure of 1.0-5.0 MPa at an acetate liquid space velocity of 0.1-2 h<-1> according to a molar ratio of the hydrogen to the acetate of 15-50, wherein the Raney copper catalyst contains at least an auxiliary agent selected from Mo, Co, Ag, Mg and Ba. The method of the present invention has characteristics of high activity, high selectivity and high stability.

Description

technical field [0001] The invention relates to a method for preparing ethanol through catalyzed hydrogenation of acetate, in particular, the preparation of ethanol through catalyzed hydrogenation of acetate with a doped Raney copper catalyst. Background technique [0002] Ethanol, commonly known as alcohol, its structural formula is CH 3 CH 2 Oh. Ethanol has a wide range of uses and is widely used in food, chemical, pharmaceutical, dye, fuel, national defense and other industries. Ethanol is a good solvent, often used in the extraction of pigments in plants or medicinal ingredients in them. Ethanol with a volume fraction of 75% is commonly used as a medical disinfectant in medical treatment. As an important class of chemical raw materials, ethanol can be used to produce chemical raw materials such as acetaldehyde, ether, ethyl acetate, ethylamine, etc. It is also a raw material for the production of dyes, paints, detergents and other products. In addition, ethanol is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/08C07C29/149B01J25/00
Inventor 吴佳佳黄龙鲁树亮田保亮王秀玲彭晖王国清唐国旗杨溢戴伟
Owner CHINA PETROLEUM & CHEM CORP