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Processes for producing ethanol from acetaldehyde

A technology for acetaldehyde and ethanol, applied in chemical instruments and methods, preparation of organic compounds, catalysts for physical/chemical processes, etc., can solve problems such as limiting ethanol production

Inactive Publication Date: 2012-04-11
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These impurities can limit the production of ethanol and can require expensive and complex purification trains to separate the impurities from the ethanol

Method used

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  • Processes for producing ethanol from acetaldehyde
  • Processes for producing ethanol from acetaldehyde
  • Processes for producing ethanol from acetaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] An acetaldehyde feed stream comprising 50 wt.% acetaldehyde and 50 wt.% acetic acid was hydrogenated in the presence of a catalyst comprising 1.6 wt.% platinum and 1 wt.% tin. In the gas phase at a temperature of 250°C, a pressure of 250 psig and a rate of 4,500 hr -1 The GHSV undergoes hydrogenation reactions. The composition of the crude ethanol mixture in the reactor effluent is provided in Table 7 below.

Embodiment 2

[0099] The acetaldehyde feed stream was hydrogenated as in Example 1 except at a temperature of 300°C. The composition of the resulting crude ethanol mixture in the reactor effluent is provided in Table 7 below.

Embodiment 3

[0101] An acetaldehyde feed stream having 50 wt.% acetaldehyde and 50 wt.% ethanol was hydrogenated under the conditions described in Example 1. The composition of the resulting crude ethanol mixture in the reactor effluent is provided in Table 7 below.

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PUM

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Abstract

Processes for forming an ethanol mixture by hydrogenating an acetaldehyde feed stream in the presence of a catalyst. The acetaldehyde feed stream comprises acetaldehyde and at least one of acetic acid and ethanol. Preferably the acetaldehyde feed stream is a by-product stream from a vinyl acetate synthesis process.

Description

[0001] priority claim [0002] This application claims priority to: U.S. Provisional Application No. 61 / 300,815, filed February 2, 2010, U.S. Provisional Application No. 61 / 332,699, filed May 7, 2010, filed August 6, 2010 US Provisional Application No. 12 / 852,269; and US Application No. 12 / 915,625, filed October 29, 2010, the entire contents and disclosure of which are hereby incorporated by reference. field of invention [0003] The present invention generally relates to a process for hydrogenating an acetaldehyde feed stream to form an ethanol mixture in the presence of a catalyst. Background of the invention [0004] Ethanol for industrial use is conventionally produced from petrochemical feedstocks such as oil, natural gas or coal, from feedstock intermediates such as synthesis gas, or from starchy or cellulosic materials such as corn or sugar cane. Conventional methods for the production of ethanol from petrochemical feedstocks as well as from cellulosic materials incl...

Claims

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Application Information

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IPC IPC(8): B01J21/16B01J23/62C07C31/08
CPCB01J37/0009B01J23/626C07C67/055C07C29/141B01J23/89B01J21/16C07C31/08C07C69/15
Inventor R·杰夫迪克V·J·琼斯登L·萨拉格尔R·J·沃尼尔H·维尼尔T·霍顿
Owner CELANESE INT CORP
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