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Process unit and method for preparing polymethoxy dimethyl ether

A polymethoxydimethyl ether and preparation process technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry and other directions, can solve the problems of complex process and high cost of raw materials, and achieve simple process route and service life. Long, overall simple effect

Active Publication Date: 2014-03-12
JIANGSU KAIMAO PETROCHEM TECH
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  • Abstract
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Problems solved by technology

At present, paraformaldehyde and methanol are mostly used as raw materials in China, the process is complicated, and the cost of raw materials is high

Method used

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  • Process unit and method for preparing polymethoxy dimethyl ether

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Embodiment Construction

[0022] 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.

[0023] like figure 1 Shown is a flow chart of the production process for synthesizing polyoxymethylene dimethyl ether (DMMn, n=3-5) with formaldehyde and methylal as raw materials provided by the present invention. The process flow is introduced in detail as follows:

[0024] The raw materials used in this process are formaldehyde (mass concentration 37-90%) and methylal (mass concentration 82-99.5%), and the reaction conversion rate can reach about 90%. The catalyst is...

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Abstract

The invention discloses a process unit and method for preparing polymethoxy dimethyl ether. According to the method, cheaper and more accessible methylal formaldehyde are used as raw materials, and a solid acid resin with longer service life is used as a catalyst to synthesize the polymethoxy dimethyl ether. By using the cheaper and more accessible methylal formaldehyde are used as the raw materials, the complete process workshop and process route are simple; and the catalyst adopts the solid acid resin which has the advantages of low cost, simple preparation process and longer service life.

Description

technical field [0001] The invention belongs to the technical field of chemical product production technology, and in particular relates to a preparation technology and device of polymethoxydimethyl ether (DMMn, n=3~6). Background technique [0002] Due to the excessive emission of diesel pollutants, the statistics of the past two years show that the nitrogen oxides emitted by domestic diesel vehicles are close to 70% of the total automobile emissions, and the particulate matter exceeds 90%. Motor vehicle exhaust emissions have become an important factor in air pollution, and smoggy weather occurs frequently. How to effectively control PM2.5 and motor vehicle exhaust pollution has become a hot spot of social concern. Only by starting with the oil at the source can we truly solve the problem of "black smoke from the exhaust" of diesel vehicles. Increasing the oxygen-containing components of diesel is considered by experts to be the development direction of diesel cleanliness....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/30C07C41/56
CPCC07C41/56C07C43/30
Inventor 向家勇许引杨科歧张鸿伟周淑敏
Owner JIANGSU KAIMAO PETROCHEM TECH
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