Polyformaldehyde dimethyl ether synthesis catalyst

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

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

[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 A new catalyst for the synthesis of polyoxymethylene dimethyl ether

Method used

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  • Polyformaldehyde dimethyl ether synthesis catalyst

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Experimental program
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Effect test

Embodiment 1

[0027] 1. Preparation of catalyst

[0028] Sodium sulfonate polystyrene cation exchange resin 7320 was washed with deionized water until clear water flowed out, soaked in 4w% hydrochloric acid for 4 hours, then washed with deionized water until pH = 6, and dried at 60°C to obtain sulfonic acid Type polystyrene cation exchange resin, its total exchange capacity is 4.10mmol / g. Take sulfonic acid polystyrene cation exchange resin equivalent to 98 grams of dry base resin and 300 ml of CuCl containing 2 grams of Cu 2 The aqueous solutions were mixed, left standing at room temperature for 24 hours, finally washed with deionized water until no chloride ions existed, and dried in a vacuum drying oven to constant weight to obtain a catalyst with a Cu content of 2w%.

[0029] 2. Synthesis of polyoxymethylene dimethyl ether

[0030] Add 2 grams of catalyst, 100 grams of methanol and 100 grams of paraformaldehyde in a 300 ml tank reactor, react at 130 ° C and 0.5 MPa autogenous pressure...

Embodiment 2

[0032] 1. Preparation of catalyst

[0033] Sodium sulfonate polystyrene cation exchange resin 7320 was washed with deionized water until clear water flowed out, soaked in 4w% hydrochloric acid for 4 hours, then washed with deionized water until pH = 6, and dried at 60°C to obtain sulfonic acid Type polystyrene cation exchange resin, its total exchange capacity is 4.10mmol / g. Get the sulfonic acid polystyrene cation exchange resin equivalent to 98 grams of dry base resin and 300ml of FeCl containing 2 grams of Fe 2 The aqueous solutions were mixed, left standing at room temperature for 24 hours, finally washed with deionized water until no chloride ions existed, and dried in a vacuum drying oven to constant weight to obtain a catalyst with an Fe content of 2w%.

[0034] 2. Synthesis of polyoxymethylene dimethyl ether

[0035] Add 2 grams of catalyst, 100 grams of methanol and 100 grams of paraformaldehyde in a 300 ml tank reactor, react at 130 ° C and 0.5 MPa autogenous press...

Embodiment 3

[0037] 1. Preparation of catalyst

[0038] Sodium sulfonate polystyrene cation exchange resin 7320 was washed with deionized water until clear water flowed out, soaked in 4w% hydrochloric acid for 4 hours, then washed with deionized water until pH = 6, and dried at 60°C to obtain sulfonic acid Type polystyrene cation exchange resin, its total exchange capacity is 4.10mmol / g. Get the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin and 300ml containing Fe to be 1 gram containing Cu to be 1 gram ferrous chloride cupric chloride mixed aqueous solution and mix, leave standstill 24 hours under room temperature, finally Wash with deionized water until there is no chloride ion, and dry to constant weight in a vacuum oven to prepare a catalyst with a Fe content of 1w% and a Cu content of 1w%.

[0039] 2. Synthesis of polyoxymethylene dimethyl ether

[0040] Add 2 grams of catalyst, 100 grams of methanol and 100 grams of paraformaldehyde i...

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Abstract

The present invention relates to a polyformaldehyde dimethyl ether synthesis catalyst. In the prior art, with the application of methanol, methylal and paraformaldehyde as reaction raw materials to synthesize polyformaldehyde dimethyl ether, the activity and the selectivity of the catalyst are low. A purpose of the present invention is mainly to solve the problems in the prior art. The technical scheme of the present invention comprises that by using the polyformaldehyde dimethyl ether synthesis catalyst, the catalyst is a metal ion modified sulfonic acid type polystyrene cation exchange resin, the sulfonic acid type polystyrene cation exchange resin comprises a cross-linked polystyrene skeleton and a sulfonic acid group, and the metal comprises at least one selected from a group IB element and a group VIII element. The polyformaldehyde dimethyl ether synthesis catalyst of the present invention can be used in the industrial production of polyformaldehyde dimethyl ether.

Description

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

Claims

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Application Information

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