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Ethanol production from acetic acid utilizing a molybdenum carbide catalyst

一种碳化钼、助催化剂的技术，应用在有机化学、化学仪器和方法、羟基化合物制备等方向，能够解决没有提供乙酸到乙醇转化的具体实例等问题

Inactive Publication Date: 2013-03-06
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, no specific example of conversion of acetic acid to ethanol is provided

Method used

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  • Ethanol production from acetic acid utilizing a molybdenum carbide catalyst
  • Ethanol production from acetic acid utilizing a molybdenum carbide catalyst
  • Ethanol production from acetic acid utilizing a molybdenum carbide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A catalyst comprising 8 wt.% molybdenum carbide and 5 wt.% copper on silica was deployed in a tubular reactor made of stainless steel with an inner diameter of 30 mm and capable of raising to a controlled temperature. The length of the catalyst bed after loading was about 70 mm.

[0061] The feed liquid of acetic acid was evaporated and charged into the reactor together with hydrogen and helium as carrier gas, and the average gas hourly space velocity ( GHSV) is about 2500hr -1 . The molybdenum carbide and copper catalysts exhibited 98.9% selectivity to ethoxylates. The selectivity to ethane is 1.5%.

Embodiment 2

[0063] The reactor and procedure of Example 1 were repeated except for the catalyst comprising 8 wt.% molybdenum carbide and 1 wt.% palladium on silica.

[0064] The feed liquid of acetic acid was evaporated and charged to the reactor together with hydrogen and helium as carrier gas, the average gas hourly space velocity (GHSV) of the combined gas was about 2500 hr at a temperature of about 250°C and a pressure of 14 barg -1 . The selectivity to ethanol was 64.4% at 52.5% conversion of acetic acid. The selectivity to ethoxylates was 98.3%. The selectivity to ethane was 1.7%.

Embodiment 3

[0066] The reactor and procedure of Example 1 were repeated except for the catalyst comprising 8 wt.% molybdenum carbide and 1 wt.% palladium on silica.

[0067] The feed liquid of acetic acid was evaporated and charged to the reactor together with hydrogen and helium as carrier gas, the average gas hourly space velocity (GHSV) of the combined gas was about 2500 hr at a temperature of about 250°C and a pressure of 14 barg -1 . The selectivity to ethanol was 64.5% at 62% conversion of acetic acid. The selectivity to ethoxylates was 98.3%. The selectivity to ethane was 1.7%.

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Abstract

A process for the selective and direct formation of ethanol from acetic acid comprising contacting a feed stream containing acetic acid and hydrogen in vapor form at an elevated temperature with a hydrogenation catalyst comprising molybdenum carbide and one or more promoter metals selected from the group consisting of copper, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, titanium, zinc, chromium, rhenium, potassium, tin and tungsten on a catalyst support.

Description

technical field [0001] The present invention relates generally to a process for the selective and direct formation of ethanol from acetic acid using a catalyst comprising molybdenum carbide and a compound selected from the group consisting of copper, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, supported on a catalyst support. One or more promoter metals of iridium, platinum, titanium, zinc, chromium, rhenium, potassium, tin and tungsten. Background technique [0002] There has long been a need for an economically viable process for converting acetic acid to ethanol. Ethanol is an important commodity feedstock for a variety of industrial products and is also used as a fuel additive for gasoline. Ethanol can be easily dehydrated to ethylene, which can then be converted into a variety of products based on both polymers and small molecules. Ethanol is routinely produced from feedstocks where price fluctuations become more pronounced. That is, fluctuating natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/149C07C31/08
CPCC07C29/149C07C31/08
Inventor V·J·约翰斯顿B·金米奇J·C·范德瓦尔J·兹恩克V·祖扎纽克J·查普曼L·陈
Owner CELANESE INT CORP
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