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Process for producing polyoxymethylene dimethyl ether with methanol and paraformaldehyde

A technology of polyoxymethylene dimethyl ether and process method, which is applied in the direction of chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problem of low yield of process products, and achieve good technical effect and yield and the effect of high selectivity and low production cost

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Process for producing polyoxymethylene dimethyl ether with methanol and paraformaldehyde
  • Process for producing polyoxymethylene dimethyl ether with methanol and paraformaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Preparation of catalyst

[0038] Wash the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until clear water flows out, then soak it with 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of sodium sulfonate polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, and then washed with deionized water until there is no chloride ion in the eluate, 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 dry base resin 98 grams and 300ml contain Cu and be 2 grams of Cu(OH) 2 Mix the aqueous suspension, 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 obtain a catalyst with a Cu content of 2w%.

[0039] 2. Synthesis of polyoxymethylene dimethyl ...

Embodiment 2

[0044] 1. Preparation of catalyst

[0045] Wash the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until clear water flows out, then soak it with 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of sodium sulfonate polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, and then washed with deionized water until there is no chloride ion in the eluate, 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 Mn(OH) containing Mn with 300ml 2 Mix the aqueous suspension, 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 Mn content of 2w%.

[0046] 2. Synthes...

Embodiment 3

[0049] 1. Preparation of catalyst

[0050] Wash the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until clear water flows out, then soak it with 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of sodium sulfonate polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, and then washed with deionized water until there is no chloride ion in the eluate, 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 equivalent to 98 grams of dry base resin, under nitrogen protection, with 300ml of Cu(OH) containing 1 gram of Cu and 1 gram of Mn 2 and Mn(OH) 2 Mix the aqueous suspension, 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 Cu content of 1w%...

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Abstract

The invention relates to a process for producing polyoxymethylene dimethyl ether with methanol and paraformaldehyde. It mainly solves the problem of low yield of polyoxymethylene dimethyl ether products. By adopting the process method of producing polyoxymethylene dimethyl ether with methanol and paraformaldehyde, the process is divided into a reaction zone and a separation zone. The reaction zone includes nitrogen storage tanks, methanol Storage tank, mixing tank with heater, drying pipe, spray tower and liquid phase reactor. The process step in the reaction zone is that paraformaldehyde is heated in the mixing tank to become formaldehyde gas, and then sent to the drying pipe to remove water after being purged with nitrogen. , enter the spray tower from bottom to top, and contact with methanol countercurrently in the spray tower to form a methanol solution of formaldehyde and feed it to the liquid phase reactor. The technical scheme of generating polyoxymethylene dimethyl ether by reacting the mixture better solves this 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 Patents(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