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Ethanol production method

A technology of ethanol and catalyst, which is applied in the field of ethanol production, can solve the problems of low single pass conversion rate, poor selectivity, harsh catalyst reaction conditions, etc., and achieve the effect of mild reaction conditions, good technical effect, and good catalyst activity selectivity

Active Publication Date: 2014-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the prior art acetic acid catalytic hydrogenation to ethanol technology has the problems of harsh catalyst catalytic reaction conditions, low single-pass conversion rate and poor selectivity, and provides a new method for producing ethanol

Method used

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Embodiment 1

[0040] Catalyst 1 is used as the upper bed, catalyst 6 is the lower bed, the weight ratio of the upper and lower beds is 1:2, pure acetic acid is used as the raw material, and the upper and lower bed catalyst weight ratio is 1:2, the inlet reaction temperature is 230 °C, and the hydrogen pressure is 2.5 MPa , H 2 The molar ratio to acetic acid is 30, and the volume space velocity of the liquid phase raw material is 0.3 h -1 The reaction was carried out under certain conditions, and the catalytic results are shown in Table 2.

[0041]

Embodiment 2~12

[0043] The catalyst used is shown in Table 2, with pure acetic acid as raw material, at the inlet reaction temperature of 230 ° C, hydrogen pressure of 2.5 MPa, H 2 The molar ratio to acetic acid is 30, and the volume space velocity of the liquid phase raw material is 0.3 h -1 The reaction was carried out under certain conditions, and the catalytic results are shown in Table 2.

[0044]

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Abstract

The invention relates to an ethanol production method. The problems of strict catalytic reaction conditions and low once-through conversion rate of acetic acid hydrogenation catalysts in the prior art in the ethanol production process are solved in the invention. The method comprises the following steps: allowing raw materials comprising acetic acid and hydrogen to contact and react with a composite bed catalyst composed of a Pd-based catalyst and a Cu-based catalyst at a reaction temperature of 180-270DEG C under a reaction pressure of 0.5-5.0MPa under an acetic acid liquid volume air speed of 0.1-0.5h<-1> to generate ethanol and water, wherein a molar ratio of hydrogen to acetic acid is 1:0.1-0.01; and separating to obtain ethanol. The above technical scheme well solves the problems, and the method can be used in the industrial production of ethanol through acetic acid hydrogenation.

Description

technical field [0001] The present invention relates to a method for producing ethanol. Background technique [0002] Non-renewable resources such as coal, oil, and natural gas are becoming less and less. Many countries, such as Brazil, the United States, and China, are actively developing and utilizing biomass fuel ethanol production technology to alleviate the energy crisis facing the world. As a clean energy source, ethanol can not only replace tetraethyl lead as an anti-knock agent for gasoline, but also be used as a vehicle fuel, greatly reducing the pollution caused by gasoline combustion. At present, 60% of the world's ethanol production is used as automobile fuel, and the production methods of ethanol mainly include biomass fermentation and chemical synthesis using petroleum-based substances as raw materials. The Global Renewable Fuels Alliance and F.O. Licht released the global annual ethanol production forecast on February 14, 2011. The global ethanol production i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/08C07C29/149B01J23/89B01J23/889
CPCB01J23/002B01J23/8892B01J23/8966B01J2523/00C07C29/149C07C31/08B01J2523/17B01J2523/27B01J2523/31B01J2523/25B01J2523/72B01J2523/3706B01J2523/22B01J2523/48
Inventor 王辉王德举张勤顾国耀李则俊王燕波
Owner CHINA PETROLEUM & CHEM CORP
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