Process for indirectly producing alcohol with synthetic gas and application of process
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A technology for synthesis gas and methanol synthesis, which is applied in the production of bulk chemicals, preparation of organic compounds, preparation of hydroxyl compounds, etc., and can solve the problems of high price, unproven economy, and high material requirements.
Active Publication Date: 2013-04-03
SHANGHAI WUZHENG ENG TECH CO LTD
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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 hydrogen
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Embodiment 1
[0097] In this example, refer to the attached Figure 1-2 The apparatus and procedures shown set up the various reaction components.
[0098] Methanol reactor A is a plate-type fixed-bed reactor with an inner diameter of 40mm and a height of 1800mm. It is equipped with a Cu-Zn-Al catalyst for synthesizing methanol (composed of CuO 15wt%, ZnO 65wt% and Al 2 o 3 20wt%); the reaction zone temperature is 225-265°C, and the reaction pressure is 5MPa;
[0099] Industrial carbon monoxide (purity 98V%) and H 2 (Purity is 99.9V%) is mixed into synthesis gas at a volume ratio of 2.7:1, and the methanol reactor outlet heat exchanger C and the methanol reactor inlet heat exchanger B are continuously heat-exchanged to reach the catalyst bed inlet temperature of the methanol reactor A After 195°C, feed from the top of the methanol reactor A to catalyze the methanol synthesis reaction, and the bottom reaction product passes through the outlet heat exchanger C of the methanol reactor to e...
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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" ...
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