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Method for preparing ethanol by ethyl acetate hydrogenation

A technology for producing ethyl acetate and ethanol, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of high price, low space velocity, high reaction temperature and pressure of ethanol, and achieve low price, The effect of good activity stability and long operation time

Inactive Publication Date: 2018-09-28
肖锦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the invention is to provide a method for the hydrogenation of ethyl acetate to ethanol, that is, to use supported Co-Sn / Al 2 o 3 Catalyst The method of ethyl acetate hydrogenation to ethanol solves the problems of high ethanol reaction temperature and pressure and low space velocity caused by expensive supported palladium or platinum catalysts

Method used

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  • Method for preparing ethanol by ethyl acetate hydrogenation

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Experimental program
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Effect test

Embodiment 1

[0022] Mix and stir a certain amount of ferric nitrate, tin tetrachloride and deionized water evenly to obtain an impregnation solution containing Co‐Sn; add a certain amount of α‐Al to the above impregnation solution 2 o 3 The carrier was aged at room temperature for 24 hours, then dried at 80°C for 4 hours, and calcined at 700°C for 4 hours to obtain a catalyst precursor;

[0023] The catalyst precursor is reduced, the reduction temperature is 400°C, the reduction time is 10h, the hydrogen content in the hydrogen-containing atmosphere is 15% by volume, and the volume space velocity of the hydrogen-containing atmosphere is 2000h ‐1 , to obtain catalyst I. By adjusting the amount of active components and supports, the composition of catalyst I is: Co content 10.5% by weight, Sn content 5.6% by weight, α-Al 2 o 3 The content of 83.9% by weight.

Embodiment 2

[0025] Mix and stir a certain amount of ferric nitrate, tin tetrachloride and deionized water evenly to obtain an impregnation solution containing Co‐Sn; add a certain amount of γ‐Al to the above impregnation solution 2 o 3 The carrier was aged at room temperature for 24 hours, then dried at 80°C for 4 hours, and calcined at 700°C for 4 hours to obtain a catalyst precursor;

[0026] The catalyst precursor is reduced, the reduction temperature is 400°C, the reduction time is 10h, the hydrogen content in the hydrogen-containing atmosphere is 15% by volume, and the volume space velocity of the hydrogen-containing atmosphere is 2000h ‐1 , to obtain Catalyst II. By adjusting the amount of active components and supports, the composition of Catalyst II is: Co content 6.6% by weight, Sn content 12.1% by weight, γ‐Al 2 o 3 The content of 81.1% by weight.

Embodiment 3

[0028] Mix and stir a certain amount of ferric nitrate, tin tetrachloride and deionized water evenly to obtain an impregnation solution containing Co‐Sn; add a certain amount of γ‐Al to the above impregnation solution 2 o 3 The carrier was aged at room temperature for 24 hours, then dried at 80°C for 4 hours, and calcined at 700°C for 4 hours to obtain a catalyst precursor;

[0029] The catalyst precursor is reduced, the reduction temperature is 400°C, the reduction time is 10h, the hydrogen content in the hydrogen-containing atmosphere is 15% by volume, and the volume space velocity of the hydrogen-containing atmosphere is 2000h ‐1 , to obtain catalyst III. By adjusting the amount of active components and supports, the composition of catalyst III is: Co content 8.6% by weight, Sn content 12.1% by weight, γ‐Al 2 o 3 The content of 79.3% by weight.

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Abstract

The invention discloses a method for preparing ethanol by ethyl acetate hydrogenation. The method comprises the steps: mixing ethyl acetate and hydrogen under the conditions that the temperature is 100-200 DEG C, the pressure is 0.1-2.0MPa, the mass space velocity is 10-15h<-1>, and the feeding substance amount ratio of hydrogen to ethyl acetate is 1:1 to 10:1, and contacting the mixture with a supported Co-Sn / Al2O3 catalyst to carry out a hydrogenation reaction to obtain ethanol. The catalyst is relatively low in price and high in activity, ethanol can be obtained under the conditions of lowtemperature, low pressure and high space velocity, and the production cost of ethanol is reduced.

Description

technical field [0001] The invention relates to the field of organic chemical industry, in particular to a method for preparing ethanol by hydrogenating ethyl acetate. Background technique [0002] Ethanol is a high-quality liquid fuel with low sulfur and ash content, similar combustion performance to gasoline, high oxygen content and octane number, complete combustion and low carbon monoxide emissions compared with ordinary gasoline, and the use of ethanol gasoline can significantly To reduce environmental pollution caused by burning gasoline, ethanol is called the "green energy" of the 21st century. With the intensification of the contradiction between oil supply and demand and the increasing pressure on the environment, countries around the world generally pay attention to alternative energy sources, which promotes the development of fuel ethanol. Most of the existing ethanol production technologies use crops as raw materials. Due to the limitation of raw materials, the ...

Claims

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Application Information

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IPC IPC(8): C07C29/149C07C31/08B01J23/835B01J37/18B01J37/02B01J37/08C10L1/02
CPCB01J23/835B01J37/0201B01J37/088B01J37/18C07C29/149C10L1/02C07C31/08Y02P20/584
Inventor 肖锦
Owner 肖锦
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