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PODE (polyoxymethylene dimethyl ethers) catalyst

A technology of dimethyl ether and catalyst, applied in the field of polyoxymethylene dimethyl ether catalyst, can solve the problem of low product selectivity and achieve good yield and good technical effect

Active Publication Date: 2018-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that there is a problem of low product selectivity of n=2-10 in the process of synthesizing polyoxymethylene dimethyl ether with methanol, methylal and paraformaldehyde as reaction raw materials in the prior art, and a kind of New Polyoxymethylene Dimethyl Ether Catalyst

Method used

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  • PODE (polyoxymethylene dimethyl ethers) catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of catalyst

[0039] 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, 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 Cu content of 2w%.

[0040] 2. ...

Embodiment 2

[0043] 1. Preparation of catalyst

[0044] 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 Ra(OH) containing 2 grams of Ra 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 ...

Embodiment 3

[0048] 1. Preparation of catalyst

[0049] 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 Be(OH) containing 2 grams of Be under nitrogen protection 2 The aqueous suspension is mixed, 1 drop of glacial acetic acid is added, mixed, allowed to stand at room temperature for 24 hours, and dried to constant weight in a vacuum drying oven to obtain a catalyst with a Be con...

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Abstract

The invention relates to a PODE (polyoxymethylene dimethyl ethers) catalyst and mainly aims to solve the problems of low catalyst activity and selectivity in technologies for synthesizing PODE from reaction materials including methanol, methylal and polyoxymethylene in the prior art. The PODE catalyst is modified metal ion modified sulfonic acid type polystyrene cation exchange resin including a crosslinked polystyrene framework and a sulfonic acid group; modified metals comprise at least one of IIA metals. Therefore, the catalyst can be used in industrial production of PODE.

Description

Technical field [0001] The invention relates to a polyoxymethylene dimethyl ether catalyst. Background technique [0002] In recent years, with the deepening of the 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 received increasing attention. [0003] Dimethyl ether was first proposed as an additive to diesel. However, due to its poor cold start performance, high vapor pressure at room temperature, and easy air resistance, the cost of dimethyl ether as an alternative fuel for vehicles h...

Claims

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Application Information

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IPC IPC(8): C07C41/56C07C43/30B01J31/10
CPCB01J31/10C07C41/56C07C43/30
Inventor 杨为民高晓晨缪晓春吴征石竹柏诗哲高焕新
Owner CHINA PETROLEUM & CHEM CORP
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