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Bubbling type external reaction system and method for synthesizing polyoxymethylene dimethyl ether

A polymethoxydimethyl ether and reaction system technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high production cost, low synthesis conversion rate and yield, etc., and achieve conversion degree of realization, improvement of absorption effect, effect of high-efficiency reaction

Active Publication Date: 2018-02-23
无锡赫利邦化工科技有限公司
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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to overcome the defects of high production cost, low synthetic conversion rate and low yield of polyoxymethylene dimethyl ether at present, and to provide a method for synthesizing polyoxymethylene through continuous conversion of multi-stage different reaction conditions. Reaction System of Dimethyl Ether

Method used

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  • Bubbling type external reaction system and method for synthesizing polyoxymethylene dimethyl ether
  • Bubbling type external reaction system and method for synthesizing polyoxymethylene dimethyl ether
  • Bubbling type external reaction system and method for synthesizing polyoxymethylene dimethyl ether

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Embodiment

[0036] like figure 1 As shown, a bubbling external reaction system for the synthesis of polyoxymethylene dimethyl ether includes a bubbling absorption tower IX, a first external reactor II, a pre-reactor I and a second external reactor III; The output end of the pre-reactor I is connected to the input end of the external reactor I, and the input end of the first external reactor II is also connected to the output end of the bubbling absorption tower IX through the discharge pump V. The first The output end of the external reactor II is respectively connected to the input end of the bubble absorption tower IX and the separation unit; the output end of the bottom of the bubble absorption tower IX is respectively connected to the middle part of the bubble absorption tower IX and the second external The input end of the reactor III is connected, and the output end of the second external reactor III is connected with the middle part of the bubbling absorption tower IX. A condenser...

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Abstract

The invention discloses a bubbling type external reaction system and a method for synthesizing polyoxymethylene dimethyl ether. The multistage continuous conversion under the different reaction conditions is realized by means of an external reactor, a pre-reactor and a bubble absorption tower, the problem of polymerization in a gas phase formaldehyde production process is solved, and the problem that the temperature of a fixed bed reactor is not easy to control is solved. Furthermore, the system and the method, which are provided by the invention, have a heat transfer effect, and can efficiently promote a reaction to be carried out along the positive direction. Bubble absorption greatly improves the formaldehyde absorption effect, thus effectively avoiding the risk of high concentration gas phase formaldehyde polymerization. A rectifying section of the bubble absorption tower can evacuate the reaction heat and the produced impurity methyl formate in time. The pre-reactor can be used for freely adjusting the proportion of reaction raw materials, thus enabling the conversion degree to be controllable.

Description

technical field [0001] The invention relates to the technical field of synthesis of polyoxymethylene dimethyl ether, in particular to a bubbling external reaction system for synthesis of polyoxymethylene dimethyl ether. Background technique [0002] Global energy has entered a period of severe exploitation. High-quality energy is becoming less and less, and energy prices are increasing day by day. Especially after the crude oil crisis, countries have gradually begun to cut production and increase crude oil prices. Oil prices will gradually rise in the future. 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. The development of coal liquefaction to oil technology is undoubtedly of strategic importance. In addition, my country's methanol produ...

Claims

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Application Information

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IPC IPC(8): C07C41/56C07C43/30
CPCC07C41/56C07C43/30
Inventor 邓青桑练
Owner 无锡赫利邦化工科技有限公司
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