Method for preparing ethanol by hydrogenation of acetic ester

A technology for hydrogenation of acetate and ethanol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of high metal price, unfavorable industrial production, and high cost, and achieves low content requirements and is conducive to industrialization. Produce, make simple effects

Active Publication Date: 2011-06-15
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 costly, which is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 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.

[0027] 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. The middle part of the...

Embodiment 2

[0030] 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 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 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.

[0031] 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 is 250°C and the ...

Embodiment 3

[0033] 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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PUM

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Abstract

The invention discloses a method for preparing ethanol by hydrogenation of acetic ester. The method comprises the following step of: hydrogenating the acetic ester at the reaction temperature of between 180 and 300 DEG C under the reaction pressure of between 1.0 and 5.0 MPa in the presence of a reducing and activating copper-based catalyst to generate the ethanol, wherein the copper-based catalyst takes Cu as an active ingredient, SiO2 as a carrier and at least one of transition metal or / and alkali metal as an aid. The method has high space-time yield, high ethanol selectivity, a simple process and low cost, is environmentally-friendly, and contributes to industrial production.

Description

technical field [0001] The invention relates to a method for preparing ethanol, in particular to a method for preparing ethanol by hydrogenating acetate. Background technique [0002] 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, increasing the contact area and increasing the reaction rate. [0003] Regarding the preparation technology of ethanol, the methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/08C07C29/149B01J23/889B01J23/80B01J23/75B01J23/885B01J23/78
CPCB01J23/72B01J23/80B01J23/885C07C29/149B01J21/08B01J23/78B01J35/1019B01J23/8892B01J23/8926
Inventor 王科陈鹏胡玉容李扬范鑫
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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