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Catalyst for preparation of polyoxymethylene dimethyl ether

A dimethyl ether and catalyst technology, which is applied in the field of catalysts for preparing polyoxymethylene dimethyl ether, 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 preparation of polyoxymethylene dimethyl ether

Method used

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  • Catalyst for preparation of polyoxymethylene dimethyl ether

Examples

Experimental program
Comparison scheme
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 type polystyrene cation exchange resin that is equivalent to dry base resin 98 grams and 300ml contain Mg and be 2 grams of MgCl 2 The aqueous solutions were mixed, and stood at room temperature for 24 hours, and finally washed with deionized water until no chloride ions existed, and dried in a vacuum oven to constant weight, that is, a catalyst with a Mg content of 2w% was prepared.

[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 ...

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 Mg is 1 gram and Cu is 1 gram of magnesium chloride copper chloride mixed aqueous solution to mix, under room temperature stand for 24 hours, finally use deionized Wash with water until there is no chloride ion, and dry to constant weight in a vacuum oven to prepare a catalyst with a Mg 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 in a 300 ml t...

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Abstract

The invention relates to a catalyst for preparation of polyoxymethylene dimethyl ether, and mainly solves the problems of low activity and selectivity of catalysts in a polyoxymethylene dimethyl ether synthesis process adopting methanol, methylal and paraformaldehyde as the reaction raw materials in the prior art. According to a technical scheme, the catalyst for preparation of polyoxymethylene dimethyl ether is metal ion modified sulfonic acid type polystyrene cation exchange resin, the sulfonic acid type polystyrene cation exchange resin includes a crosslinked polystyrene skeleton and a sulfonic acid group, and the metal includes at least one of IB group and IIA group elements. The catalyst can be used for the industrial production of polyoxymethylene dimethyl ether.

Description

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

Claims

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Application Information

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IPC IPC(8): B01J31/10C07C41/56C07C43/30
CPCB01J31/10C07C41/56C07C43/30
Inventor 高晓晨刘文杰顾军民高焕新
Owner CHINA PETROLEUM & CHEM CORP
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