Catalyst used in preparation of ethanol through hydrogenation of acetate and preparation method thereof

A copper-based catalyst, silicate technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of unfavorable industrial production, high cost and metal price. Expensive and other problems, to achieve the effect of being conducive to industrial production, simple production, low content requirements

Active Publication Date: 2012-04-25
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lanthanide or actinide metals are expensive and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Weigh 24.1g Cu(NO 3 ) 2 and 1.0g Mn(NO 3 ) 2 Add deionized water to prepare a mixed salt solution with a concentration of 0.2M, add 28% ammonia water dropwise, stir and mix evenly, control the pH value to 11, drop 70.5g JA-25 silica sol into the salt solution, and stir for 2 hours ; Heat the above solution to 70°C, and react at constant temperature for 5 hours until the pH value of the solution is 7.0; filter the feed solution while it is hot, wash it with deionized water three times, and filter it with suction; after the catalyst is dried at 80°C for 10 hours, Calcined for 2 hours; pressed into pellets, placed in a reaction tube, and reduced with 100ml / min of pure hydrogen at 250°C for 5 hours to obtain catalyst A.

[0029] The above catalyst is used in the reaction of ethyl acetate hydrogenation to ethanol. The device adopts a fixed bed reactor. The reaction tube is a stainless steel tube with an inner diameter of 20 mm and a length of 50 cm. Th...

Example Embodiment

[0031] Example 2

[0032] Weigh 12.0g Cu(NO 3 ) 2 and 2.0g Zn(NO 3 ) 2 Add deionized water to prepare a mixed salt solution with a concentration of 0.2M, add 28% ammonia water dropwise, stir and mix evenly, control the pH value to 14, drop 81.0g JA-25 silica sol into the salt solution, and stir for 8 hours ;Heat the above solution to 80°C, react at constant temperature for 5h, until the pH value of the solution is 6.0; filter the feed liquid while it is hot, wash it with deionized water three times, and filter it with suction; after the catalyst is dried at 80°C for 24 hours, Calcined for 6 hours; pressed into a tablet and placed in a reaction tube, with 150ml / min of pure hydrogen, reduced at 350 for 3 hours, and the catalyst was catalyst B.

[0033] This example catalyst B is used in the ethyl acetate hydrogenation ethanol reaction, and the reaction device and process treatment and analysis method are the same as example 1. The difference is that the reaction temperature...

Example Embodiment

[0034] Example 3

[0035] The catalyst is selected from the above-mentioned catalyst B, and B is applied to the reaction of methyl acetate hydrogenation to ethanol, and the hydrogenation reaction device and process are the same as ethyl acetate. The reaction temperature is 250°C, and the reaction pressure is 2.5Mpa. Ethanol selectivity 57%, space-time yield 0.70g / (g catalyst h -1 ).

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Abstract

The invention discloses a catalyst used in the preparation of ethanol through hydrogenation of acetate and a preparation method thereof. The catalyst uses Cu as an active component, SiO2 as a carrier and at least one selected from the group consisting of transition metal and alkali metal as an auxiliary agent. The copper-based catalyst provided in the invention has good stability and high activity, and has a low requirement for the content of the active component Cu, which only needs to be more than 15%. The preparation method provided in the invention has the advantages of simple operation, low cost and environment-friendliness and is benefit for industrial production.

Description

[0001] The present invention is a divisional application of the invention patent application with application number 201010584928.0. technical field [0002] The invention relates to a catalyst for preparing ethanol by hydrogenation of acetate and a preparation method thereof. Background technique [0003] Ethanol, commonly known as alcohol, its structural formula is CH 3 CH 2 Oh. Ethanol has a wide range of uses. Ethanol can be used to make acetic acid, beverages, flavors, dyes, fuels, etc. Ethanol with a volume fraction of 70%-75% is also commonly used as a disinfectant in medical treatment. Ethanol is a very good solvent, which can dissolve many inorganic substances and many organic substances, so ethanol is often used to dissolve plant pigments or medicinal ingredients in them, and ethanol is also commonly used as a reaction solvent to make the organic substances and organic substances participating in the reaction All inorganic substances can be dissolved, increasin...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/80B01J23/75B01J23/885B01J23/78B01J23/72C07C31/08C07C29/149
Inventor 王科陈鹏胡玉容李扬范鑫
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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