Process for indirectly producing alcohol with synthetic gas and application of process

Abstract

The invention relates to a process for indirectly producing alcohol with synthetic gas. The process comprises the steps that the synthetic gas formed by mixing industrial carbon monoxide with hydrogen is taken as a raw material to synthesize methanol; methanol is dehydrated to prepare dimethyl ether; dimethyl ether, carbon monoxide and hydrogen are mixed for carbonylation reaction to prepare methyl acetate; methyl acetate is purified and hydrogenated; a hydrogenated product is purified; and an alcohol product is obtained. An adopted catalyst, the process and a device have the characteristics of high conversion per pass and high effective utilization rate of reaction heat; the load of separating a crude product is reduced greatly; the production flow is shortened; and the production energy consumption is reduced greatly.

Description

technical field [0001] The invention relates to a process for indirect production of ethanol from synthesis gas and its application, belonging to the field of ethanol production from synthesis gas. Background technique [0002] Ethanol is an important basic chemical raw material, used to manufacture acetaldehyde, ethylene, ethylamine, ethyl acetate, acetic acid, ethyl chloride, etc., and derived from medicines, dyes, paints, spices, synthetic rubber, detergents, pesticides and other products There are many intermediates and more than 300 kinds of products. At the same time, in the application of fuel energy industry, because ethanol has low calorific value, high latent heat of vaporization, good antiknock performance, and high oxygen content, it is easy to produce phase separation in the presence of a small amount of water, and compared with ordinary gasoline, it burns more completely. , low CO emissions, similar combustion performance, etc., so it is called "green energy" ...

AI Technical Summary

Problems solved by technology

However, in its process route, precious metals such as rhodium and iridium are used in the methanol carbonylation process; ethanol is produced by hydrogenation of acetic acid, and the technology of directly and selectively producing ethanol from acetic acid using a platinum / tin catalyst (patent USP7863489), the hydrogenation process requires Two steps to complete, the economy needs to be verified

At the same time, the process has high requirements on materials and relatively large investment. For example, the methanol carbonylation acetic acid reactor and acetic acid hydrogenation reactor equipment use expensive zirconium or Hastelloy

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