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Catalyst for gas phase hydrogenation of acetic acid to prepare ethanol

A technology for preparing ethanol and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, organic chemistry, etc., to reduce energy consumption and improve selectivity

Inactive Publication Date: 2011-11-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, judging from the fact that the increase in grain prices has greatly exceeded the increase in ethanol prices, there is still a large room for ethanol prices to rise in the market outlook.

Method used

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  • Catalyst for gas phase hydrogenation of acetic acid to prepare ethanol

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Embodiment 1

[0027] The catalyst of embodiment 1 is 10%Mo-5%Re-1.0%Ru / almond kernel carbon. Prepared by conventional impregnation method: take 8.40 grams of apricot kernel charcoal (20-40 mesh), soak and boil in 3%wt nitric acid for 4 hours before use, wash with distilled water to about pH=7.0, dry at 120°C for 6 hours, and configure 15ml contains 1.8971 grams (NH 4 ) 2 Mo 2 o 4 .4H 2 O, 0.7203 g NH 4 ReO 4 and 0.1996 g RuCl 3 .3H 2 O aqueous solution, air-dried naturally, and oven-dried at 120°C for 4 hours. Before use, in hydrogen at 300°C (atmospheric pressure, 1000h -1 ) reduction activation for 5 hours.

Embodiment 2

[0029] Catalyst 10%W-5.0%Re-1.0%Ru / almond charcoal of embodiment 2. In addition to the configuration 15ml contains 1.5443 grams (NH 4 ) 2 WO 4 Except aqueous solution, all the other preparation steps are identical with embodiment 1.

Embodiment 3

[0031] Catalyst of Example 3 10%W-5.0%Re-1.0%Ru / coir charcoal. Except weighing 8.40 grams of coconut shell charcoal, all the other preparation steps are the same as in Example 2.

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Abstract

The invention provides a catalyst for gas phase hydrogenation of acetic acid to prepare ethanol, consisting of three parts: a main active component, an auxiliary agent and a carrier. The main active component is one or two of transition metal W and Mo. The auxiliary agent is one or more of Pd, Re, Pt, Rh, Ru or other noble metals. The carrier is active carbon or graphite or multi walled carbon nanotube. In a fixed bed reactor, at a certain temperature, under the effects of hydrogen pressure and the catalyst, acetic acid can be transformed into a product with ethanol as a major product with high activity and high selectivity.

Description

technical field [0001] The invention relates to a catalyst for preparing ethanol by gas-phase hydrogenation of acetic acid, and mainly relates to a catalyst for converting acetic acid and hydrogen into ethanol as a main product under gas-phase reaction conditions. 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. my country has a large population but insufficient arable land. Generally speaking, food is not abundant, and oil resources are relatively insufficient, wh...

Claims

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Application Information

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IPC IPC(8): B01J23/656C07C31/08C07C29/149
Inventor 丁云杰王涛吕元马立新宋勤华邵守言凌晨曹宏兵李兴龙
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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