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Method for producing polyoxymethylene dimethyl ether from methanol and paraformaldehyde

A technology of polyoxymethylene dimethyl ether and process method, which is applied in chemical instruments and methods, preparation of organic compounds, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low yield of process products, etc. Good technical effect, high yield and selectivity, low production cost

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

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is the problem that the yield of polyoxymethylene dimethyl ether process products is low in the prior art with methanol and paraformaldehyde as raw materials, and a new process for producing polyoxymethylene dimethyl ether is provided. Has the advantage of high yield

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 1. Preparation of catalyst

[0041] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the Cu(OH) that is equivalent to the sulfonic acid type polystyrene cation exchange resin of 98 grams of dry base resin and 300ml containing Cu is 2 grams 2 The aqueous suspensions were mixed, 1 drop of glacial acetic acid was 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%.

[0042] 2...

Embodiment 2

[0047] 1. Preparation of catalyst

[0048] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin that is equivalent to 98 grams of dry base resin, under the protection of nitrogen, be 2 grams of Mn(OH) containing Mn with 300ml 2 The aqueous suspensions were mixed, 1 drop of glacial acetic acid was added, mixed, left to stand at room temperature for 24 hours, and dried in a vacuum oven to constant weight to obtain a catalyst with a Mn cont...

Embodiment 3

[0052] 1. Preparation of catalyst

[0053] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin that is equivalent to 98 grams of dry base resin, under nitrogen protection, be 2 grams of Tc(OH) containing Tc with 300ml 2 Mix the aqueous suspensions, add 1 drop of glacial acetic acid, mix, let stand at room temperature for 24 hours, and dry to constant weight in a vacuum oven to prepare a catalyst with a Tc content of 2w%.

[0054] 2. Sy...

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Abstract

The invention relates to a method for producing polyoxymethylene dimethyl ether from methanol and paraformaldehyde. The method for producing polyoxymethylene dimethyl ether from methanol and paraformaldehyde is used to mainly solve the problem of low yield of the polyoxymethylene dimethyl ether product. The method is characterized in that a reaction zone and a separation zone are involved in the method, and the reaction zone includes a nitrogen storage tank, a methanol storage tank, a mixing tank with a heater, a drying tube, a spray tower and a liquid phase reactor; and a technology in the reaction zone comprises the following steps: the paraformaldehyde is heated in the mixing tank to form a formaldehyde gas, the formaldehyde gas is conveyed into the drying tube through nitrogen blowing,is dewatered, then enters the spray tower from top to bottom, and is in countercurrent contact with methanol in the spray tower to form a methanol solution of formaldehyde, and the methanol solutionof formaldehyde is fed into the liquid phase reactor, and reacts with a recovered mixture introduced to the reactor under the action of a solid acid catalyst to generate the polyoxymethylene dimethylether. The method for producing polyoxymethylene dimethyl ether well solves the technical problem, and can be used in the industrial production of polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a process for producing polyoxymethylene dimethyl ether with methanol 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. According to statistics, in 2011 my country's dependence on foreign oil reached 56.5%, an increase of 1.7 percentage points compared with 2010. Since my country became a net oil importer for the first time in 1993, China's dependence on foreign oil has been rising from 6% in that year, and broke through the warning line of 50% 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/56C07C43/30B01J31/10B01J37/30
CPCC07C41/56B01J31/10B01J37/30B01J2231/4288C07C43/30Y02P20/584
Inventor 高晓晨石竹缪晓春
Owner CHINA PETROLEUM & CHEM CORP
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