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Method for preparing alcohol by acetic acid gas phase hydrogenation

A technology for hydrogen preparation and acetic acid, applied in chemical instruments and methods, hydroxyl compound preparation, organic compound preparation, etc., can solve the problems of high reaction pressure and poor selectivity, and achieve the advantages of reducing reaction pressure and energy consumption, and improving selectivity. Effect

Active Publication Date: 2011-11-02
JIANGSU SOPO CHEM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These current methods generally have the disadvantages of high reaction pressure and poor selectivity.

Method used

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  • Method for preparing alcohol by acetic acid gas phase hydrogenation
  • Method for preparing alcohol by acetic acid gas phase hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The catalyst used is W-Re-Ru / almond charcoal. The weight composition of the catalyst is: W=10.0%, Re=5%, Ru=2%, and the rest is carrier activated carbon. Commercial apricot kernel charcoal was used as the carrier, and the catalyst active component W and additives Re and Ru were loaded on the carrier activated carbon (the particle size of activated carbon was 20-40 mesh) by conventional impregnation method. 7.0 grams (about 10ml) of the catalyst was activated by hydrogen before the reaction, and the activation conditions were: GHSV=1000h -1 , Atmospheric pressure, 300°C, reduction time 5 hours. Choose a fixed bed reactor. The reaction temperature is 250°C, the hydrogen pressure is 10.0MPa, and the H 2 / acetic acid (refined acetic acid) molar ratio is 15 acetic acid liquid space velocity is 1.0h -1 , the reaction time is 50h, sampling analysis. The gas phase effluent was analyzed by gas chromatography, Porapark Q packed column, TCD detector; the liquid product sample...

Embodiment 2

[0025] The space velocity of acetic acid liquid is 0.5h -1 , other conditions are identical with embodiment 1.

Embodiment 3

[0027] The space velocity of acetic acid liquid is 1.9h -1 , other conditions are identical with embodiment 1.

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Abstract

The invention relates to a method for preparing alcohol by acetic acid gas phase hydrogenation. A reaction system comprises acetic acid, hydrogen and a catalyst; the reaction temperature is 120-300 DEG C; the reaction pressure is 1.0-20.0MPa; the space velocity of acetic acid liquid is 0.5-10.5h<-1>; the molar ratio of H2 to acetic acid is 1-250; the catalyst takes activated carbon as a carrier; and main active components comprise one or two of transitional metals such as W and Mo. The addition agent is one of or more of precious metals such as Pd, Re, Pt, Rh and Ru and the like; and the acetic acid and the hydrogen can be converted into alcohol with high activity and selectivity under the action of the catalyst.

Description

technical field [0001] The invention relates to a method for preparing ethanol by gas-phase hydrogenation of acetic acid, in particular a method for producing ethanol by gas-phase hydrogenation of acetic acid as a raw material. Background technique [0002] Ethanol is an important solvent and chemical raw material, and it is also an ideal high-octane non-polluting vehicle fuel and its additives. Brazil has been using ethanol as vehicle fuel or fuel additive for many years. In recent years, my country has implemented the promotion of ethanol gasoline in many provinces, and the effect is obvious. With the improvement of environmental quality requirements, the development of alcohol fuel and the addition of alcohol or ether in gasoline have become the main way to improve automobile fuel. The industrial production method of ethanol is mainly based on the grain fermentation method, and every ton of ethanol produced by the grain fermentation method needs to consume 3.2 tons of co...

Claims

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Application Information

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IPC IPC(8): C07C31/08C07C29/149B01J23/656
Inventor 宋勤华邵守言胡宗贵代松涛朱桂生丁云杰严丽王涛马立新
Owner JIANGSU SOPO CHEM
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