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Catalyst and method for preparing ethanol by hydrogenating acetic ester

A technology of acetate hydrogenation and catalyst, applied in the field of catalytic chemistry, can solve the problems of low hydrogen-ester ratio, poor selectivity of ethanol, low conversion rate of raw materials, etc., achieve high ethanol selectivity, avoid loss, and high conversion of raw materials rate effect

Inactive Publication Date: 2014-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that there are technical problems in the prior art that the ratio of hydrogen to ester is too high, the conversion rate of raw materials is low, and the selectivity of ethanol is poor. A new catalyst for preparing ethanol by hydrogenation of acetate is provided. It has the advantages of low hydrogen-ester ratio, high conversion rate of raw materials and high ethanol selectivity in the reaction of hydrogenation of acetate to ethanol

Method used

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  • Catalyst and method for preparing ethanol by hydrogenating acetic ester
  • Catalyst and method for preparing ethanol by hydrogenating acetic ester
  • Catalyst and method for preparing ethanol by hydrogenating acetic ester

Examples

Experimental program
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Effect test

Embodiment 1

[0030]Pour 640g of silica sol (mass concentration: 25%) into a three-necked flask, weigh 60.4g of copper nitrate trihydrate, 3.89g of nickel nitrate hexahydrate, and 69.44g of zinc nitrate hexahydrate, add distilled water to dilute to 0.8L, and stir evenly. Add the mixed salt solution into the flask for thorough stirring, add ammonia water dropwise to control the pH of the solution to 10, heat to 75°C, stir for 5 hours until the pH of the solution is 6.0; then wash the precipitate with suction and filter, and dry at 90°C for 5 hours , calcined at 400°C for 5 hours, and pressed into pellets to obtain catalyst 1. The composition and physical property data of Catalyst 1 are shown in Table 1.

[0031]

Embodiment 2

[0033] Pour 466.7g of silica sol (mass concentration: 30%) into a three-necked flask, weigh 90.6g of copper nitrate trihydrate, 5.75g of manganese nitrate tetrahydrate, and 70.6g of cerium nitrate hexahydrate, add distilled water to dilute to 0.8L, and stir well , put the mixed salt solution into the flask for full stirring, add dropwise ammonia water to control the pH of the solution to 11, heat to 75°C, stir for 5 hours until the pH of the solution is 6.0; then wash the precipitate with suction and filter, and dry at 90°C for 5 hours, calcined at 400° C. for 10 hours, and pressed into tablets to obtain catalyst 2. The composition and physical property data of catalyst 2 are shown in Table 1.

[0034]

Embodiment 3

[0036] Pour 175g of silica sol (mass concentration 40%) into a three-necked flask, weigh 362.4g of copper nitrate trihydrate, 14.62g of zinc nitrate hexahydrate, and 11.26g of zirconium oxynitrate, add distilled water to dilute to 1.5L, stir evenly, and Add the mixed salt solution into the flask for thorough stirring, add ammonia water dropwise to control the pH value of the solution to 10, heat to 75°C, stir for 5 hours until the pH value of the solution is 6.0; then wash and filter the precipitate, and dry it at 90°C for 5 hours, Calcined at 400° C. for 10 hours, and pressed into pellets to obtain catalyst 3 . The composition and physical property data of catalyst 3 are shown in Table 1.

[0037]

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Abstract

The invention relates to a catalyst and a method for preparing ethanol by hydrogenating acetic ester and mainly solves the problems that in the prior art, the ratio of hydrogen to ester is too high, the conversion rate of raw materials is low and the selectivity of ethanol is poor. The catalyst is composed of the following components in parts by weight: (a) 5-80 part of metallic copper or copper oxide, (b) 0.05-60 parts of catalyst promoter and (c) 5-90 parts of silicon dioxide carrier, wherein the catalyst promoter is selected from at least one of transitional metal or oxide of the transitional metal; the specific area of the catalyst is 150-500 m<2> per gram; the total pore volume is 0.1-3.0 ml / gram; the pore volume of the diameter less than 20nm is 40-90% of the total pore volume; the pore volume of the diameter less than 50nm and larger than 20nm is 5-75% of the total pore volume; and the pore volume of the diameter larger than 50nm is 5-75% of the total pore volume. By adopting the technical scheme, the problems are well solved; and the catalyst can be used for industrial production of ethanol by hydrogenating acetic ester.

Description

technical field [0001] The invention belongs to the field of catalytic chemistry, in particular to a catalyst and a method for preparing ethanol by hydrogenating acetate. Background technique [0002] Ethanol is widely used in food, medicine, chemical industry, fuel, national defense and other industries. As a very important component of clean fuel and gasoline anti-knock agent, it can greatly reduce the emission of pollutants from combustion. my country is the second largest producer and consumer of gasoline in the world. In the era of high oil prices, fuel substitution is one of the effective ways to ensure national energy security and reduce costs. Studies have shown that the use of E10 ethanol gasoline for vehicles (10% ethanol) can increase the octane number by 3%, reduce CO emissions by 25-30%, and reduce CO emissions. 2 About 10%. Therefore, the development of ethanol gasoline is of great significance to improving the environment and realizing sustainable developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/889B01J23/72B01J23/885B01J23/83C07C31/08C07C29/149
Inventor 刘仲能涂云宝徐晓清江兴华李则俊
Owner CHINA PETROLEUM & CHEM CORP
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