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Production method of PODE (polyoxymethylene dimethyl ethers)

A technology of polyoxymethylene dimethyl ether and paraformaldehyde, applied in chemical instruments and methods, preparation of organic compounds, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low product selectivity and achieve The effect of 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

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Problems solved by technology

[0006] The technical problem 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 and paraformaldehyde as reaction raw materials in the prior art, and a new polyoxymethylene dimethyl ether is provided. Methods of Ether Production

Method used

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  • Production method of PODE (polyoxymethylene dimethyl ethers)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Preparation of catalyst

[0031] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin that is equivalent to dry base resin 98 grams and 300ml contain Cu and be 2 grams of Cu(OH) 2 The aqueous suspensions were mixed, 1 drop of glacial acetic acid was added, mixed, left standing 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%.

[0032] 2. Synt...

Embodiment 2

[0035] 1. Preparation of catalyst

[0036] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, under nitrogen protection, be 2 grams of Ra(OH) with 300ml containing Ra 2 Mix the aqueous suspensions, add 1 drop of glacial acetic acid, mix, let stand at room temperature for 24 hours, and dry to constant weight in a vacuum oven to prepare a catalyst with an Ra content of 2w%.

[0037] 2. Synthesis...

Embodiment 3

[0040] 1. Preparation of catalyst

[0041] Sodium sulfonate type polystyrene cation exchange resin 7320 is washed with deionized water until clear water flows out, then soaked four times with 4w% hydrochloric acid, each use is equivalent to 10 times the dry weight of sodium sulfonate type polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, then washed with deionized water until the eluate was free of chloride ions, and dried at 60°C to obtain a sulfonic acid polystyrene cation exchange resin with a total exchange capacity of 4.10 mmol / g. Get the sulfonic acid type polystyrene cation exchange resin equivalent to 98 grams of dry base resin, under nitrogen protection, be 2 grams of Be(OH) with 300ml containing Be 2 Mix the aqueous suspensions, add 1 drop of glacial acetic acid, mix, let stand at room temperature for 24 hours, and dry to constant weight in a vacuum oven to prepare a catalyst with a Be content of 2w%.

[0042] 2. Synthesis ...

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Abstract

The invention relates to a production method of PODE (polyoxymethylene dimethyl ethers) and mainly aims to solve the problems of low catalyst activity and selectivity in technologies for synthesizingPODE from reaction materials including methanol and trioxymethylene in the prior art. According to the production method of PODE, methanol and trioxymethylene are used as raw materials and contacted with a PODE catalyst to react to produce PODE; the 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 Cu and IIA metals. Therefore, the production method can be used in industrial production of PODE.

Description

technical field [0001] The invention relates to a method for producing 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 increased...

Claims

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Application Information

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IPC IPC(8): C07C41/56C07C43/30B01J31/10
CPCB01J31/10B01J2231/4288C07C41/56C07C43/30
Inventor 高晓晨吴征石竹缪晓春柏诗哲朱桂莲范弢高焕新
Owner CHINA PETROLEUM & CHEM CORP
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