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Combined production system for synthesis and separation of low-carbon mixed alcohols and its combined production process

A low-carbon mixed alcohol and joint production technology, which is applied in the separation/purification of hydroxyl compounds, the preparation of organic compounds, the preparation of hydroxyl compounds, etc., can solve the problems of poor separation effect and difficult production technology of low-carbon mixed alcohols, and achieve clean Utilize coal resources, reduce dependence, and realize the effect of coal resources

Active Publication Date: 2017-03-15
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The main purpose of the present invention is to provide a low-carbon mixed alcohol synthesis and separation joint production system and its joint production process, to solve the technical difficulties in the production technology of using raw material synthesis gas to synthesize low-carbon mixed alcohol in the prior art, and at the same time Solved the problem of poor separation effect of low-carbon mixed alcohols

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  • Combined production system for synthesis and separation of low-carbon mixed alcohols and its combined production process
  • Combined production system for synthesis and separation of low-carbon mixed alcohols and its combined production process
  • Combined production system for synthesis and separation of low-carbon mixed alcohols and its combined production process

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no. 3 example

[0111] The third embodiment adopts the low-carbon mixed alcohol separation subsystem of the present invention to carry out low-carbon mixed alcohol separation, and the low-carbon mixed alcohol separation subsystem is as follows image 3 shown.

[0112] The low-carbon mixed alcohol separation subsystem includes: flash tank, non-condensable gas removal tower, the first dehydration rectification tower, methanol rectification tower, ethanol rectification tower, extractive rectification tower, n-propanol rectification tower, the first A phase separator and corresponding cooler.

[0113] The operating conditions of each tower are as follows:

[0114] The operating pressure of the non-condensable gas removal tower is 0.203Mpa(G), and the operating temperature is 112.4°C;

[0115] The operating pressure of the first dehydration rectification tower is 0.081Mpa(G), and the operating temperature is 117.9°C;

[0116] The operating pressure of the methanol rectification tower is -0.05Mp...

no. 2 example

[0122] The second embodiment adopts the low-carbon mixed alcohol separation subsystem of the present invention to carry out low-carbon mixed alcohol separation, and the low-carbon mixed alcohol separation subsystem is as follows figure 2 shown.

[0123] The low-carbon mixed alcohol separation subsystem includes: methanol rectification tower, ethanol rectification tower, extractive rectification tower, n-propanol rectification tower, extractant recovery tower, n-propanol purification rectification tower, first dehydration rectification tower 1. The second dehydration rectification tower and the non-condensable gas removal tower; it also includes a first phase separator, a second phase separator, a membrane separation device and a corresponding cooler. The extractant is ethylene glycol, and the oil-water separation membrane in the membrane separation device is a ceramic pervaporation membrane.

[0124] The operating conditions of each tower are as follows:

[0125] The operat...

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Abstract

The invention provides a joint production system and a joint production process for synthesizing and separating low-carbon mixed alcohol. The joint production system for synthesizing and separating the low-carbon mixed alcohol comprises a low-carbon mixed alcohol synthesis subsystem and a low-carbon mixed alcohol separation subsystem, wherein the low-carbon mixed alcohol synthesis subsystem comprises a raw gas treatment module, a low-carbon alcohol synthesis module and a product treatment module which are communicated with one another in order, and the product treatment module comprises a low-carbon alcohol separation part which comprises a low-carbon alcohol separator and is provided with a low-carbon mixed alcohol outlet for draining a low-carbon mixed alcohol product; and the low-carbon mixed alcohol separation subsystem comprises a methanol rectifying tower, an ethanol rectifying tower, an extraction rectifying tower and an n-propyl alcohol rectifying tower. By adopting the system and the process provided by the invention, the problem of production technical difficulty during synthesis of the low-carbon mixed alcohol by using a raw material synthetic gas in the prior art is solved, and meanwhile, the problem of poor separation effect of the low-carbon mixed alcohol is solved.

Description

technical field [0001] The invention relates to the field of coal-to-alcohol chemical industry, in particular to a combined production system for synthesis and separation of low-carbon mixed alcohols and a combined production process thereof. Background technique [0002] In recent years, the supply of crude oil has become increasingly tight, and methanol, an alternative fuel for crude oil, has many shortcomings in performance. C 2+ Low-carbon alcohols refer to low-carbon mixed alcohols formed from C1-C6 alcohols, which are mainly formed after dehydration of crude mixed alcohols synthesized from coal-based synthesis gas. Low-carbon mixed alcohols have higher octane Value and good blending performance with gasoline, it can replace methyl tert-butyl ether (MTBE) as a gasoline additive. At the same time, low-carbon mixed alcohol itself is also a good clean fuel, which can replace gasoline as fuel. In fact, if the mixed low-carbon alcohols are separated, high-grade chemical al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/04C07C31/08C07C31/10C07C31/12C07C29/152C07C29/76C07C29/80C07C29/84
CPCC07C29/152C07C29/80C07C29/84C07C31/04C07C31/08C07C31/10C07C31/12C07C31/02
Inventor 吴秀章卢卫民李水弟王立志谢君张艳红郭胜好苏爱东董栗英彭晓春戈军赵代胜蔡丽娟李艺马英民房克功王贵王军亭张永红路江
Owner CHNA ENERGY INVESTMENT CORP LTD
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