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Catalyst used for polyoxymethylene dimethyl ether synthesis

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

Inactive Publication Date: 2017-04-26
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 polyoxymethylene dimethyl ether catalyst

Method used

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  • Catalyst used for polyoxymethylene dimethyl ether synthesis
  • Catalyst used for polyoxymethylene dimethyl ether synthesis
  • Catalyst used for polyoxymethylene dimethyl ether synthesis

Examples

Experimental program
Comparison scheme
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 AlNiCo40, 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 downloadin...

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 AlNiCo44, 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 downloadin...

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 AlNiCo52, 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 downloadin...

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Abstract

The invention relates to a catalyst used for polyoxymethylene dimethyl ether synthesis. The catalyst mainly solves the problems of low catalyst activity and low selectivity of technologies for synthesizing polyoxymethylene dimethyl ether from methanol, methylal and paraformaldehyde in the prior art. The catalyst is a sulfonic acid type polystyryl cation exchange resin and alloy permanent magnet hybrid material, and the sulfonic acid type polystyryl cation exchange resin comprises a crosslinked polystyrene skeleton and a sulfonic group; and the alloy permanent magnet is selected from at least one of AlNiCo40, AlNiCo44 and AlNiCo52. The catalyst is used in industrial production of the polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a catalyst for 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 has ...

Claims

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Application Information

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IPC IPC(8): B01J31/10B01J31/28C07C41/56C07C43/30
Inventor 高晓晨刘文杰顾军民高焕新
Owner CHINA PETROLEUM & CHEM CORP
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