Method for synthesizing polyformaldehyde dimethyl ether from methanol, methylal and paraformaldehyde

A technology of polyoxymethylene dimethyl ether and paraformaldehyde, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as low catalyst conversion rate, complicated preparation process, unstable reaction, etc., and achieve production Low cost, simple separation, good product yield

Active Publication Date: 2014-03-26
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 prior art, methanol, methylal, and paraformaldehyde are used as raw materials to synthesize polyoxymethylene dimethyl ether. The catalyst con

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] [Example 1]

[0015] Add 2g of catalyst 001*7(732), 100ml of methanol and 100g of paraformaldehyde into a 300ml tank reactor, and react for 4h at 130℃ and 0.8MPa autogenous pressure. The sample is centrifuged and separated by gas chromatography. analysis. The product contains polyoxymethylene dimethyl ether and unreacted raw materials methanol and paraformaldehyde, and its composition distribution is shown in Table 1.

[0016]

Example Embodiment

[0017] [Example 2]

[0018] Add 2 g of catalyst D113, 100 ml of methanol and 100 g of paraformaldehyde into a 300 ml tank reactor, react at 130°C and 0.6 MPa autogenous pressure for 4 hours, and centrifuge the sample for analysis 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.

[0019]

Example Embodiment

[0020] [Example 3]

[0021] Add 1 g of catalyst D001, 100 ml of methylal and 100 g of paraformaldehyde into a 300 ml tank reactor, react at 130°C and 0.6 MPa autogenous pressure for 4 hours, and extract the sample for centrifugal separation and analyze 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.

[0022]

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PUM

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Abstract

The invention relates to a method for synthesizing polyformaldehyde dimethyl ether from methanol, methylal and paraformaldehyde, and is mainly used for solving the problems that the catalyst in the prior art is low in percent conversion, unstable in reaction, complicated in preparation technology, and not easy to control. The problems are well solved by adopting the technical scheme that methanol, methylal and paraformaldehyde are adopted as raw materials, and the raw materials contact the catalyst and react to generate polyformaldehyde dimethyl ether under the conditions that the reaction temperature is 70-200 DEG C and the reaction pressure is 0.2-6MPa, wherein the mass ratio of methanol to methylal to paraformaldehyde is (0-10):(0-10):1, and the dosages of methanol and methylal cannot be 0 at the same time; the used catalyst is acidic ion exchange resin; the dosage of the catalyst is 0.05-10% of the weight of the raw materials. The method can be applied to industrial production of polyformaldehyde dimethyl ether.

Description

technical field [0001] The invention relates to a method for synthesizing polyoxymethylene dimethyl ether from methanol, methylal and paraformaldehyde. 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 10-20 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 pressure at room temperature, and easy air resistance, the cost of DME as a...

Claims

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Application Information

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IPC IPC(8): C07C43/30C07C41/56
CPCC07C41/56C07C43/30
Inventor 高晓晨刘志成许云风高焕新杨为民
Owner CHINA PETROLEUM & CHEM CORP
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