Dehydration technique and dehydration device for synthesizing poly-methoxy-dimethyl ether

A technology of polyoxymethylene dimethyl ether and process method, which is applied in the direction of chemical instruments and methods, preparation of organic compounds, chemical recovery, etc., can solve problems such as complex process and large waste, and reduce energy consumption, pressure and The effect of temperature reduction

Inactive Publication Date: 2015-08-05
无锡智归科技有限公司
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Problems solved by technology

The process is complex and will cause a lot of waste, or bring impurities into the reaction system

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  • Dehydration technique and dehydration device for synthesizing poly-methoxy-dimethyl ether
  • Dehydration technique and dehydration device for synthesizing poly-methoxy-dimethyl ether
  • Dehydration technique and dehydration device for synthesizing poly-methoxy-dimethyl ether

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[0021] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0022] The dehydration process for synthesizing polyoxymethylene dimethyl ether provided by the present invention, at first reduces the bring-in of moisture from the raw material, selects the formaldehyde gas within 0.1% of water content and dissolves in high-concentration methylal (99%- 99.5%) to form a methylal solution of formaldehyde, so that the reactant reacts in the liquid phase. Compared with paraformaldehyde and paraformaldehyde, the reaction conditions are reduc...

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Abstract

The invention discloses a dehydration technique and a dehydration device for synthesizing poly-methoxy-dimethyl ether. The dehydration technique comprises the following steps: selecting a formaldehyde gas of which the moisture content is within 0.1% and high-concentration dimethoxymethane to form a methylal solution of formaldehyde as a reactant; obtaining a poly-methoxy-dimethyl ether product under the acid catalysis condition; further carrying out hydrolysis reaction on high-concentration dimethoxymethane, and further consuming moisture, so as to control the reaction system in an anhydrous state. Therefore, the poly-methoxy-dimethyl ether yield is improved; furthermore, the reaction condition of the reaction system is also reduced; and the reaction energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical production technology and equipment, and mainly relates to a production process method of polyoxymethylene dimethyl ether. Background technique [0002] The characteristics of my country's energy structure are: rich in coal, poor in oil, and low in gas. The sustained and rapid economic growth requires more and more energy, and the contradiction between social and economic development and oil supply has become increasingly prominent. Since 2009, my country's dependence on foreign crude oil has exceeded the warning line (50%) for six consecutive years, seriously affecting my country's energy strategic security. From the perspective of my country's energy strategy and security, combined with the characteristics of my country's primary energy structure, the development of coal-based liquid fuel synthesis technology is undoubtedly of strategic importance. In addition, my country's methanol production...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/56C07C41/58C07C43/30
CPCY02P20/582C07C41/56C07C41/58C07C43/30
Inventor 林立伟黄隆君吴婷马凌
Owner 无锡智归科技有限公司
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