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Method for producing polyoxymethylene dimethyl ether from paraformaldehyde

A paraformaldehyde and dimethyl ether technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of low catalyst reaction efficiency and high cost of paraformaldehyde

Active Publication Date: 2017-06-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low catalyst reaction efficiency and high cost of paraformaldehyde as raw material in the process of synthesizing polyoxymethylene dimethyl ether with methanol, methylal and paraformaldehyde as raw materials in the prior art. A new method for producing polyoxymethylene dimethyl ether from paraformaldehyde and a new catalyst suitable for the process

Method used

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  • Method for producing polyoxymethylene dimethyl ether from paraformaldehyde
  • Method for producing polyoxymethylene dimethyl ether from paraformaldehyde

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / CMP-0 (the molar ratio of covalent group to ligand is 0.1), wherein the mass fraction ratio of solid superacid to CMP-0 carrier is 20:80, 100 grams of methanol and 100 grams of paraformaldehyde, at 130 ° C React with 0.8MPa autogenous pressure for 4h, extract the sample and analyze it by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw material methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

Embodiment 2

[0019] Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / CMP-1,4 (the molar ratio of covalent group to ligand is 0.1), wherein the mass fraction ratio of solid superacid to CMP-1,4 carrier is 20:80, 100 grams of methanol and 100 grams of paraformaldehyde , Reacted at 130°C and 0.6MPa autogenous pressure for 4h, and the sample was extracted and analyzed by gas chromatography after centrifugation. The product contains polyoxymethylene dimethyl ether and unreacted raw material methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

Embodiment 3

[0021]Add 2 g of catalyst SO to a 300 ml tank reactor 4 2- / CMP-5 (the molar ratio of covalent group and ligand is 0.1), wherein the mass fraction ratio of solid superacid and CMP-5 carrier is 20:80, 100 grams of methylal and 100 grams of paraformaldehyde, in React at 130°C and 0.6MPa autogenous pressure for 4 hours, extract the sample and analyze it by gas chromatography after centrifugation. 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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Abstract

The invention relates to a method for producing polyoxymethylene dimethyl ether from paraformaldehyde, which mainly solves the problems of low catalyst reaction efficiency and high cost of paraformaldehyde as a raw material in the past. The present invention is by using methanol, methylal and paraformaldehyde as raw material, wherein methanol: methylal: the mass ratio of paraformaldehyde is (0~10): (0~10): 1, wherein methanol and methylal The dosage cannot be 0 at the same time. Under the conditions of reaction temperature of 70-200°C and reaction pressure of 0.2-6MPa, the raw material is in contact with the catalyst to generate polyoxymethylene dimethyl ether, and the dosage of the catalyst is 0.05-10% of the weight of the raw material, wherein The catalyst used comprises the following components in terms of weight fraction: a) 30-80 parts of conjugated microporous polymer carrier (CMPs); b) 20-70 parts of solid superacid technical scheme, which better solves this problem , can be used in the industrial production of polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a method for producing polyoxymethylene dimethyl ether from paraformaldehyde, 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 perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/30C07C41/56
Inventor 杨为民高晓晨高焕新石竹王灿周健陈剑
Owner CHINA PETROLEUM & CHEM CORP
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