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Catalysts used in the synthesis of polyoxymethylene dimethyl ether

A technology of dimethyl ether and catalyst, which is applied in the field of catalysts, can solve the problems of high cost of paraformaldehyde and low catalyst reaction efficiency, and achieve the effect of good yield

Active Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the prior art, methanol, methylal and paraformaldehyde are used as reaction raw materials to synthesize polyoxymethylene dimethyl ether, which has the problems of low catalyst reaction efficiency and high cost of paraformaldehyde as raw materials , providing a new catalyst for the synthesis of polyoxymethylene dimethyl ether

Method used

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  • Catalysts used in the synthesis of polyoxymethylene dimethyl ether
  • Catalysts used in the synthesis of polyoxymethylene dimethyl ether
  • Catalysts used in the synthesis of polyoxymethylene dimethyl ether

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1. Preparation of catalyst

[0027] (1) Polymerization and hybridization: at room temperature, add 144 grams of styrene, 16 grams of divinylbenzene, 1 gram of BPO and 40 grams of toluene to a 1000 ml three-necked flask and stir evenly, then add 40 grams of 500 mesh AlNiCoTi38, and stir evenly , after adding 300 grams of 1.0w% PVA aqueous solution, then react at 70°C for 3h, 80°C for 1h, and 95°C for 45min under stirring to obtain a pellet-shaped product. Stop stirring and keep boiling the pellet at 95°C for 30min. All the products in the three-necked flask were poured into water for cleaning. The product was washed with ethanol and then washed with H 2 O was washed, placed in an oven and dried at 80° C. for 4 h to obtain 200 g of catalyst precursor I.

[0028] (2) Sulfonation: Add 200 grams of catalyst precursor I to 400 grams of 1,2-dichloroethane to swell at room temperature for 4 hours, then add 100 grams of H with a purity of 98w%. 2 SO 4 , stirring and download...

Embodiment 2

[0035] 1. Preparation of catalyst

[0036] (1) Polymerization and hybridization: at room temperature, add 144 grams of styrene, 16 grams of divinylbenzene, 1 gram of BPO and 40 grams of toluene to a 1000 ml three-necked flask and stir evenly, then add 40 grams of 500 mesh AlNiCoTi60, and stir evenly , after adding 300 grams of 1.0w% PVA aqueous solution, then react at 70°C for 3h, 80°C for 1h, and 95°C for 45min under stirring to obtain a pellet-shaped product. Stop stirring and keep boiling the pellet at 95°C for 30min. All the products in the three-necked flask were poured into water for cleaning. The product was washed with ethanol and then washed with H 2 O was washed, placed in an oven and dried at 80° C. for 4 h to obtain 200 g of catalyst precursor I.

[0037] (2) Sulfonation: Add 200 grams of catalyst precursor I to 400 grams of 1,2-dichloroethane to swell at room temperature for 4 hours, then add 100 grams of H with a purity of 98w%. 2 SO 4 , stirring and download...

Embodiment 3

[0042] 1. Preparation of catalyst

[0043] (1) Polymerization and hybridization: at room temperature, add 144 grams of styrene, 16 grams of divinylbenzene, 1 gram of BPO and 40 grams of toluene to a 1000 ml three-necked flask and stir evenly, then add 40 grams of 500 mesh AlNiCoTi72, and stir evenly , after adding 300 grams of 1.0w% PVA aqueous solution, then react at 70°C for 3h, 80°C for 1h, and 95°C for 45min under stirring to obtain a pellet-shaped product. Stop stirring and keep boiling the pellet at 95°C for 30min. All the products in the three-necked flask were poured into water for cleaning. The product was washed with ethanol and then washed with H 2 O was washed, placed in an oven and dried at 80° C. for 4 h to obtain 200 g of catalyst precursor I.

[0044] (2) Sulfonation: Add 200 grams of catalyst precursor I to 400 grams of 1,2-dichloroethane to swell at room temperature for 4 hours, then add 100 grams of H with a purity of 98w%. 2 SO 4 , stirring and download...

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Abstract

The invention relates to a catalyst used in the synthesis of polyoxymethylene dimethyl ether, which mainly solves the problems of low catalyst activity and low selectivity in the existing technology of synthesizing polyoxymethylene dimethyl ether using methanol, methylal and paraformaldehyde as reaction raw materials. By using a polyoxymethylene dimethyl ether catalyst, the catalyst is a hybrid material of a sulfonic acid-type polystyrene cation exchange resin and an alloy permanent magnet. The sulfonic acid-type polystyrene cation exchange resin includes a cross-linked polystyrene skeleton. and sulfonic acid groups; the technical solution in which the alloy permanent magnet is selected from at least one of AlNiCoTi38, AlNiCoTi60 and AlNiCoTi72 can be used in the industrial production of polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a catalyst used in the synthesis of 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 to 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C07C41/56C07C43/30
CPCC07C41/56B01J23/755B01J31/10B01J31/38B01J35/19C07C43/30
Inventor 高晓晨顾军民刘文杰高焕新
Owner CHINA PETROLEUM & CHEM CORP
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