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Method for preparing polyoxymethylene dimethyl ether

A technology of polyoxymethylene dimethyl ether and paraformaldehyde, applied in chemical instruments and methods, preparation of organic compounds, catalyst activation/preparation, etc., can solve the problems of low yield, achieve low production cost, yield and selection The effect of high efficiency and good technical effect

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is the low yield of polyoxymethylene dimethyl ether synthesis process products in the prior art using methylal and paraformaldehyde as raw materials, and a new catalyst for the preparation of polyoxymethylene dimethyl ether is provided

Method used

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  • Method for preparing polyoxymethylene dimethyl ether
  • Method for preparing polyoxymethylene dimethyl ether

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Embodiment 1

[0050] 1. Preparation of catalyst

[0051] After washing the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until the water flows out, soak it in 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of the sodium sulfonate polystyrene cation exchange resin 7320 Soaked in 4w% hydrochloric acid for 4 hours each time, and then washed with deionized water until the eluate is free of chloride ions. After drying at 60°C, a sulfonic acid type polystyrene cation exchange resin is obtained, with a total exchange capacity of 4.10 mmol / g. Take the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin and 300 ml of Cu(OH) containing 2 grams of Cu 2 The aqueous suspension is mixed, 1 drop of glacial acetic acid is added, mixed, left standing at room temperature for 24 hours, and dried in a vacuum drying oven to a constant weight to obtain a catalyst with a Cu content of 2w%.

[0052] 2. Synthes...

Embodiment 2

[0057] 1. Preparation of catalyst

[0058] After washing the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until the water flows out, soak it in 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of the sodium sulfonate polystyrene cation exchange resin 7320 Soaked in 4w% hydrochloric acid for 4 hours each time, and then washed with deionized water until the eluate is free of chloride ions. After drying at 60°C, a sulfonic acid type polystyrene cation exchange resin is obtained, with a total exchange capacity of 4.10 mmol / g. Take the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, and add 300ml of Mn(OH) containing 2 grams of Mn under nitrogen protection 2 The aqueous suspension is mixed, 1 drop of glacial acetic acid is added, mixed, and allowed to stand at room temperature for 24 hours, and dried in a vacuum drying oven to a constant weight to obtain a catalyst with a ...

Embodiment 3

[0062] 1. Preparation of catalyst

[0063] After washing the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until the water flows out, soak it in 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of the sodium sulfonate polystyrene cation exchange resin 7320 Soaked in 4w% hydrochloric acid for 4 hours each time, and then washed with deionized water until the eluate is free of chloride ions. After drying at 60°C, a sulfonic acid type polystyrene cation exchange resin is obtained, with a total exchange capacity of 4.10 mmol / g. Take the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, and add 300ml of Tc(OH) containing 2 grams of Tc under nitrogen protection 2 The aqueous suspension was mixed, 1 drop of glacial acetic acid was added, mixed, and allowed to stand at room temperature for 24 hours, and dried in a vacuum drying oven to a constant weight to obtain a catalyst with ...

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Abstract

The invention relates to a method for preparing polyoxymethylene dimethyl ether, and solves the problem of low yield in the process of synthesizing polyoxymethylene dimethyl ether from methylal and paraformaldehyde as raw materials. The method for preparing polyoxymethylene dimethyl ether comprises the following step: in the presence of a catalyst, methylal and paraformaldehyde react as raw materials to generate polyoxymethylene dimethyl ether. The catalyst is metal ion-modified cation exchange resin, and the metal includes Group IB metal. By the above method, the above technical problem is greatly solved.

Description

Technical field [0001] The invention relates to a method for preparing polyoxymethylene dimethyl ether. Background technique [0002] my country's resource pattern is characterized by "rich coal, less oil, and gas", and my country's vigorous industrial development puts forward increasing requirements for oil supply. However, in recent years, my country's oil resources have become increasingly tight, and the pressure on oil supply has increased unprecedentedly. According to statistics, my country's dependence on foreign oil reached 56.5% in 2011, an increase of 1.7% over 2010. Since my country became a net oil importer for the first time in 1993, China's oil dependence on foreign countries has risen from 6% that year and broke the 50% warning line in 2009. 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 fuel substitutes based on coal has attracted increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/30C07C41/56C07C41/58B01J31/10B01J37/30
CPCC07C41/56C07C41/58B01J31/10B01J37/30B01J2231/4288C07C43/30
Inventor 高晓晨石竹范弢
Owner CHINA PETROLEUM & CHEM CORP