Synthesis method of polyformaldehyde dimethyl ether

A technology of polyoxymethylene dimethyl ether and synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high price and high production cost, and achieve low production cost, good yield and high The effect of reaction conversion

Inactive Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that in the process of synthesizing polyoxymethylene dimethyl ether with methanol and paraformaldehyde as raw materials in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] [Example 1]

[0013] Add 2g of catalyst Cl in a 300ml tank reactor - / TiO 2 , 100ml of methanol and 100g of paraformaldehyde, reacted at 130℃ and 0.8MPa autogenous pressure for 4h, and the sample was centrifuged and analyzed by gas chromatography. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

Example Embodiment

[0014] [Example 2]

[0015] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / Fe 2 O 3 , 100 ml of methanol and 100 g of paraformaldehyde, reacted at 130°C and 0.6 MPa autogenous pressure for 4 hours, and the sample was centrifuged and analyzed by gas chromatography. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

Example Embodiment

[0016] [Example 3]

[0017] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / Fe 2 O 3 , 100 ml of methylal and 100 g of paraformaldehyde, reacted at 130°C and 0.6 MPa autogenous pressure for 4 hours, and the sample was centrifuged and analyzed by gas chromatography. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methylal and paraformaldehyde, and its composition distribution is shown in Table 1.

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PUM

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Abstract

The invention relates to a synthesis method of polyformaldehyde dimethyl ether, which mainly solves the problem that the traditional method for synthesizing the polyformaldehyde dimethyl ether with trioxymethylene as a raw material has higher cost. In the invention, methanol, methylal and paraformaldehyde are used as raw materials, wherein the mass ratio of the methanol to the methylal to the paraformaldehyde is (0-10): (0-10): 1, the using amount of the methanol and the methylal cannot be zero simultaneously; and the raw materials are in contact and react with a catalyst to generate the polyformaldehyde dimethyl ether with a chemical formula of CH3O(CH2O)nCH3 under the condition that the reaction temperature is 70-200 DEG C and the reaction pressure is 0.2-6MPa, wherein the used catalyst is selected from at least one of SO4<2->/ZrO2, SO4<2->/Fe2O3, Cl<->/TiO2, Cl<->/Fe2O3, SO4<2->/Al2O3 and S2O8<2->/ZrO2. The synthesis method provided by the method better solves the problem of the traditional method and can be used in industrial production of the polyformaldehyde dimethyl ether.

Description

technical field [0001] The invention relates to a method for synthesizing polyoxymethylene dimethyl ether, in particular to a method for synthesizing polyoxymethylene dimethyl ether with paraformaldehyde as a raw material. Background technique [0002] In recent years, with the deepening influence of the industrial revolution and my country's unique resource pattern of "more coal, less oil, and gas", my country's oil resources have become increasingly tense, and the pressure on oil supply has increased unprecedentedly. It is estimated that in the next 10 to 20 years, my country's oil supply rate will only be ~50%. How to use our country's rich coal resources to solve our country's energy crisis has become an urgent problem for scientific researchers. Therefore, the development of new oil substitutes from coal-based methanol has attracted increasing attention. [0003] DME was first proposed as a diesel additive. However, due to its poor cold start performance, high vapor p...

Claims

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Application Information

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IPC IPC(8): C07C43/30C07C41/56
Inventor 李丰冯伟樑高焕新孙洪敏杨为民
Owner CHINA PETROLEUM & CHEM CORP
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