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Decarburization solvent and preparation thereof

A solvent and decarbonization technology, applied in separation methods, chemical instruments and methods, gas fuels, etc., can solve the problems of insufficient comprehensive decarbonization capacity, and achieve the effects of low regeneration energy consumption, large absorption capacity, and high purification degree

Inactive Publication Date: 2008-09-17
王胜利
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  • Claims
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Problems solved by technology

[0006] The technical problem to be solved in the present invention is: provide a kind of improved N-methyldiethanolamine (MDEA) decarburization solution, overcome the defect that the comprehensive decarburization ability that existing MDEA decarburization solution exists is insufficient

Method used

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Embodiment Construction

[0014] The present invention will be further described below by embodiment, and its purpose is to understand content of the present invention better.

[0015] A decarburization solvent, containing N-methyldiethanolamine, also includes a defoamer and an activator, wherein the content of the N-methyldiethanolamine in the decarburization solvent is 80-90wt%, and the defoamer The content of the foaming agent in the decarburization solvent is 0.1-0.5 wt%, and the content of the activator in the decarburization solvent is 10-20 wt%. In addition, the activator can be diethanolamine, monoethanolamine, sterically hindered amine, piperazine or a mixture of two or more. The defoamer is simethicone.

[0016] The following steps are required to prepare the above-mentioned decarburization solvent: first, add N-methyldiethanolamine with a content of 80 to 90 wt% in the decarburization solvent to the reaction kettle, and then sequentially add 0.1 to 90 wt% of N-methyldiethanolamine in the de...

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PUM

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Abstract

The invention relates to a decarburization solvent, which comprises n-methyldiethanolamine, defoamer and activator; wherein, the content of the n-methyldiethanolamine is 80 to 90wt% in the decarburization solvent; the content of the defoamer is 0.1 to 0.5wt% in the decarburization solvent; the content of the activator is 10 to 20wt% in the decarburization solvent. The decarburization solvent has the advantages of being applicable to the removing of carbon dioxide in the mixed gas of syngas, city gas or natural gas, removing the sulphide, large absorption capacity, high degree of purification, and low regeneration energy consumption.

Description

technical field [0001] The invention relates to the technical field of gas decarburization, in particular to a decarburization solvent and a preparation method thereof. Background technique [0002] It is well known that the removal of carbon dioxide from gases containing carbon dioxide is a widely used technology in industry. For example, in the process of natural gas, petroleum gas, city gas and synthesis gas, it is necessary to remove carbon dioxide. On the other hand, carbon dioxide itself is an important industrial raw material, which can be used to manufacture urea and organic synthesis raw materials. [0003] Since BASF developed the piperazine-activated MDEA decarburization technology in the 1970s, due to its advantages of low regeneration energy consumption, high gas purification, non-degradation of the solution, and no corrosion to carbon steel, the activated MDEA decarburization technology Widely used all over the world. So far, it has become a low-energy chemi...

Claims

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Application Information

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IPC IPC(8): B01D53/14C10L3/10
CPCY02C10/06Y02C20/40
Inventor 王胜利
Owner 王胜利
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