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System and method for preparing crude ethanol through hydrogenation of hydrogenation raw materials and application

A technology for the preparation of crude ethanol and hydrogen, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as insufficient heat utilization, increased equipment cost, and incomplete separation, and achieve improved gas-liquid separation Effect, reduce corrosion, reduce the effect of equipment corrosion

Active Publication Date: 2021-10-01
CHNA ENERGY INVESTMENT CORP LTD +1
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of equipment corrosion due to incomplete gas-liquid separation of reaction products existing in the existing technology of direct hydrogenation of acetic acid to ethanol, insufficient utilization of heat generated by hydrogenation reaction, and high-temperature gasification to increase equipment costs, and provide A system, method and application for preparing crude ethanol by hydrogenating hydrogenation raw materials

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  • System and method for preparing crude ethanol through hydrogenation of hydrogenation raw materials and application
  • System and method for preparing crude ethanol through hydrogenation of hydrogenation raw materials and application
  • System and method for preparing crude ethanol through hydrogenation of hydrogenation raw materials and application

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Embodiment 1

[0082] according to figure 1 Shown flow process, utilize system and method provided by the invention to carry out hydrogenation of acetic acid to prepare crude ethanol, the implementation process is as follows:

[0083] (1-1) The fresh acetic acid as hydrogenation raw material and the circulating acetic acid from the external deacidification tower and the circulating acetaldehyde from the external deacidification tower are respectively carried out in the heater 4 with the high-temperature reaction product from the reaction product outlet 22 Heat exchange, preheating the hydrogenation raw material to 110°C and entering the upper part of the gasification device 100 from the hydrogenation raw material inlet 12 for spraying;

[0084] (1-2) Mix the fresh hydrogen with the circulating hydrogen after the pressurization of the compressor as the hydrogen raw material, and exchange heat with the high-temperature reaction product from the reaction product outlet 22 in the heater 4, and p...

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Abstract

The invention relates to the field of ethanol preparation, in particular to a system and method for preparing crude ethanol through hydrogenation of hydrogenation raw materials and application. The system comprises gasification equipment (100), heating equipment (400), reaction equipment (200), first gas-liquid separation equipment (300) and second gas-liquid separation equipment (500), wherein the heating equipment (400) is used for respectively heating a hydrogenation raw material, hydrogen and a mixed raw material gas obtained by gasification by utilizing heat of a reaction product; and the first gas-liquid separation equipment (300) is sequentially provided with a first separation section, a second separation section and a third separation section from bottom to top and is used for carrying out first gas-liquid separation on a reaction product in a direct cooling manner. The low-temperature gasification of acetic acid can be realized, the gas-liquid separation effect of the reaction product in the process of preparing crude ethanol by hydrogenation of the hydrogenation raw material is remarkably improved, and the reaction heat is fully utilized.

Description

technical field [0001] The invention relates to the field of ethanol preparation, in particular to a system, method and application for preparing crude ethanol by hydrogenating hydrogenation raw materials. Background technique [0002] Ethanol is an important chemical product and chemical intermediate. There is a great demand for ethanol in the chemical industry. Ethanol has obvious advantages as a petroleum additive and is currently the most important fuel additive in the world. [0003] At present, ethanol production adopts the fermentation method using food and commercial crops as raw materials, which leads to the development of fuel ethanol industry being restricted by two bottlenecks: high cost and national food and cultivated land security. Non-grain route ethanol production technologies include: cellulose (mainly biomass straw) fermentation method, syngas synthesis ethanol method, etc. Among them, the cellulose fermentation ethanol technology (such as CN101235392) do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/149C07C29/76C07C31/08
CPCC07C29/149C07C29/76C07C31/08
Inventor 田树勋龙俊英张雪冰陈强张冰
Owner CHNA ENERGY INVESTMENT CORP LTD
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