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Device and method for preparing 1,3,5-trioxane continuously from concentrated formaldehyde as raw material

A technology of trioxymethylene and concentrated formaldehyde, applied in the direction of organic chemistry, can solve problems such as environmental pollution, and achieve the effects of eliminating pollution, reducing energy consumption and simple operation.

Inactive Publication Date: 2017-05-31
苏州双湖化工技术有限公司
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Problems solved by technology

In the existing paraformaldehyde technology, most of them use the benzene extraction process, and the production equipment has caused serious pollution to the environment, which has a certain impact on the promotion of this technology

Method used

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  • Device and method for preparing 1,3,5-trioxane continuously from concentrated formaldehyde as raw material

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Embodiment Construction

[0019] Such as figure 1 As shown (only the main equipment is drawn, other instruments, pumps, valves, intermediate tanks and other equipment have been omitted, and the structural representation will not affect the understanding and implementation of those skilled in the art), a kind of concentrated formaldehyde is used as raw material to continuously prepare trimer Formaldehyde plant, including reaction and concentration system, crystallization system and refining system.

[0020] Described reaction and enrichment system comprise paraformaldehyde reactor R1, concentration tower C2; The top outlet of paraformaldehyde reactor R1 links to each other with the central feed port of concentration tower C2, and concentration tower C2 tower top output outlet is connected with The feed port of the crystallization system J3 is connected, and the extraction outlet of the tower still of the concentration tower C2 is connected with the middle part reflux port of the paraformaldehyde reactor...

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Abstract

The invention discloses a device and a method for preparing 1,3,5-trioxane continuously from concentrated formaldehyde as a raw material. The device comprises a reaction and concentration system, a crystallization system and a refining system. The reaction and concentration system is mainly used for preparing 1,3,5-trioxane from concentrated formaldehyde as the raw material through a reaction under the action of a catalyst and concentrating 1,3,5-trioxane into a 1,3,5-trioxane solution with the concentration of 63% through a concentrating tower; the crystallization system is mainly used for concentrating the 1,3,5-trioxane solution with the concentration of 63% into a 1,3,5-trioxane solution with the concentration of 93% through crystallization; the refining system is mainly used for refining the 1,3,5-trioxane solution with the concentration of 93% into a 1,3,5-trioxane solution with the concentration of 99.9%, and the 1,3,5-trioxane solution serving as an intermediate product is conveyed to other devices for use. Compared with a 1,3,5-trioxane preparing route adopting extraction, the device and the method have the advantages that the flow and the operation are simple, energy consumption is low, environmental pollution caused by benzene is reduced effectively, and the device and the method are quite suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a device and method for continuously preparing paraformaldehyde through a crystallization method. Background technique [0002] With the dwindling of oil resources and the increasing demand for fuel oil in various countries around the world, all countries have intensified their efforts in research and development of new energy sources. [0003] Polyoxymethylene dimethyl ether is a low-molecular-weight acetal polymer with methoxy as the main chain. It is a colorless liquid with a high boiling point. It can be used as a modifier, solvent, plasticizer and release agent for phenolic resins, etc. . At the same time, it is also a diesel oxygenator with excellent performance. Its physical properties are similar to those of diesel. It not only has a high cetane number, but also has a high oxygen content. When adding 15% to diesel, no Retrofitting the vehicle engine oil supply system can significantly improve the combustion characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D323/06
CPCC07D323/06
Inventor 倪国兰陈超群姜玉婷
Owner 苏州双湖化工技术有限公司
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