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Catalyst for preparing ethanol from acetic ester hydrogenation, preparation method and application thereof

An acetate hydrogenation and catalyst technology, which is applied in chemical instruments and methods, hydroxyl compound preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of conversion rate, low selectivity, increased production cost, retention A period of time and other problems, to achieve the effect of high selectivity, low cost and good stability

Active Publication Date: 2013-01-16
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the selected process routes for producing ethanol from syngas are mainly divided into three types: one is to directly produce ethanol from syngas.
The second is synthetic gas biological ethanol production, that is, the use of microbial fermentation technology to produce ethanol from synthetic gas (including waste gas containing carbon monoxide and hydrogen). This method requires a period of time for fermentation, and continuous production is difficult and expensive; three. Syngas is hydrogenated with acetic acid to produce ethanol. At present, the production technology of acetic acid is mature and the price is cheap. The production of ethanol from acetic acid or hydrogenated acetate is expected to be large-scale and large-scale
Although the operating conditions of the catalyst are relatively mild, the conversion rate and selectivity are low, and cumbersome post-treatment is required, which increases the production cost

Method used

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  • Catalyst for preparing ethanol from acetic ester hydrogenation, preparation method and application thereof
  • Catalyst for preparing ethanol from acetic ester hydrogenation, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 60.4g of Cu(NO 3 ) 2 , 10.0g of Fe(NO 3 ) 2 , 74.4g of Zn(NO 3 ) 2 Place in a beaker, add 500g of distilled water to dissolve it completely, and record it as solution 1; 53.7g of Na 2 CO 3 Put it in another beaker, add 500g of distilled water to dissolve it completely, and record it as solution 2; add solution 2 dropwise to solution 1 under heating and stirring, keep the temperature at 80°C, control the reaction end point pH=7.0, and age for 3 hours , the obtained catalyst precursor slurry was washed and filtered, dried at 80° C. for 15 hours, and calcined at 350° C. for 6 hours to obtain the target product catalyst.

[0029] The catalyst prepared above was made into 20-30 mesh particles, loaded into a tubular reactor with a diameter of 12 mm, and activated at 300° C. for 6 hours under a hydrogen atmosphere. Using methyl acetate as the raw material, the reaction temperature is 225°C, and the liquid hourly space velocity is 1.0h -1 , the ratio of hydrogen to este...

Embodiment 2

[0031] 60.4g of Cu(NO 3 ) 2 , 10.0g of Ni(NO 3 ) 2 and 74.4g of Zn(NO 3 ) 2 Place in a beaker, add 500g of distilled water to dissolve it completely, and record it as solution 1; 53.7g of Na 2 CO 3Put it in another beaker, add 500g of distilled water to dissolve it completely, and record it as solution 2; add solution 1 and solution 2 at the same time under heating and stirring to precipitate, keep pH = 7.0, and age at 80°C for 3 hours, the obtained catalyst The precursor slurry was washed and filtered, dried at 80°C for 15 hours, and calcined at 500°C for 6 hours to obtain the target product catalyst.

[0032] The evaluation process conditions are the same as in Example 1.

Embodiment 3

[0034] 60.4g of Cu(NO 3 ) 2 , 10.0g of Ce(NO 3 ) 3 , 74.4g of Zn(NO 3 ) 2 Place in a beaker, add 500g of distilled water to dissolve it completely, and record it as solution 1; 53.7g of Na 2 CO 3 Put it in another beaker, add 500g of distilled water to dissolve it completely, and record it as solution 2; add solution 1 dropwise to solution 2 under the condition of heating and stirring, keep the temperature at 80°C, control the reaction end point pH=7.0, and age for 3 hours , the obtained catalyst precursor slurry was washed and filtered, dried at 80° C. for 15 hours, and calcined at 400° C. for 6 hours to obtain the target product catalyst.

[0035] The evaluation process conditions are the same as in Example 1.

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Abstract

The invention relates to a catalyst for preparing ethanol from acetic ester hydrogenation, a preparation method and an application thereof. The main catalytic components of the catalyst are copper or copper oxide with a content of 30 wt%-75 wt%; an auxiliary agent is one or more of La2O3, ZrO2, CeO2, Fe2O3, NiO, MgO, MnO, Al2O3 and K2O, with a content of 1wt%-40 wt%; a carrier is zinc oxide with a content of 20 wt%-65 wt%. In a relatively low hydrogen ester ratio and relatively large liquid hourly space velocity, the catalyst has a conversion rate of acetate larger than 99% and a selectivity of ethanol larger than 99%. Besides, the catalyst has good stability, can reduce cost greatly, and obtains higher production gains. The catalyst is simple in preparation method; the raw materials of the catalyst have wide sources and low cost; and the preparation process of the catalyst is environment-friendly, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a catalyst for hydrogenation of acetate to ethanol and its preparation method and application, in particular to a Cu catalyst for hydrogenation of acetate to ethanol and its preparation method, and the application of the catalyst to the reaction of hydrogenation of acetate to ethanol The techniques and methods of the time. Background technique [0002] Ethanol, commonly known as alcohol, is an important chemical raw material, which is widely used in food, chemical industry, military industry, medicine and other fields. In the chemical industry, ethanol is mainly used as a solvent and a raw material for synthesis. More than 300 kinds of chemical products require ethanol as a raw material; in the defense industry, ethanol is involved in the manufacture of explosives. China currently consumes about 3 million tons of industrial-grade ethanol every year, and is increasing at a rate of 8%-10%. It is expected that the consumption wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/83B01J23/889C07C31/08C07C29/149
Inventor 李永刚宁春利张春雷谢璇尹冯懿
Owner SHANGHAI HUAYI GRP CO
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