Synthetic method for polyoxymethylene dimethyl ether

A polyoxymethylene dimethyl ether and synthetic method technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high production cost and high price, and achieve low production cost, low cost and high adsorption potential high effect

Active Publication Date: 2014-06-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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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, there is a problem that the production cost is relatively high because of the high price of raw material paraformaldehyde, and a new method is provided. Synthetic method of polyoxymethylene dimethyl ether

Method used

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  • Synthetic method for polyoxymethylene dimethyl ether

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Effect test

Embodiment 1

[0015] Add 2 grams of catalyst active C (activated carbon BET specific surface area 2000m 2 / g, pore volume 0.3ml / g), 100 grams of methanol and 100 grams of paraformaldehyde, reacted at 130 ℃ and 0.8MPa autogenous pressure for 4 hours, extracted samples and analyzed them 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

[0017] Add 2 grams of catalyst active C (activated carbon BET specific surface area 2000m 2 / g, pore volume 0.3ml / g), 100 grams of methanol and 100 grams of paraformaldehyde, reacted at 130 ℃ and 0.6 MPa autogenous pressure for 4 hours, extracted samples and analyzed them 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

[0019] Add 2 grams of catalyst active C (activated carbon BET specific surface area 2500m 2 / g, pore volume 0.3ml / g), 100 grams of methylal and 100 grams of paraformaldehyde, reacted for 4 hours at 130 ℃ and 0.6 MPa autogenous pressure, the sample was extracted and analyzed 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 synthetic method for polyoxymethylene dimethyl ether, and mainly overcomes the problem of relatively high cost in a conventional method for synthesizing polyoxymethylene dimethyl ether by using trioxymethylene as a raw material. The synthetic method takes use of methanol, methylal and paraformaldehyde as raw materials, wherein a mass ratio of methanol to methylal to paraformaldehyde is 0-10 : 0-10 : 1; and the usage amount of methanol and methylal is not zero at the same time; and the raw materials are contacted with a catalyst under a reaction pressure of 0.2-6 MPa to produce polyoxymethylene dimethyl ether (CH3O(CH2O)nCH3), wherein the used catalyst is selected from activated carbon. By adopting the above technical solution, the problem is overcome relatively well; and the synthetic method can be used for industrial production of polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a method for synthesizing polyoxymethylene dimethyl ether. 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 an alternative fuel for vehicles has increased...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/30C07C41/56
CPCC07C41/56C07C43/30
Inventor 高晓晨杨为民刘志成高焕新
Owner CHINA PETROLEUM & CHEM CORP
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