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Method for synthesizing PODE (polyoxymethylene dimethyl ethers)

A technology of polyoxymethylene dimethyl ether and synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low product selectivity, etc. The effect of good rate 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] The technical problem to be solved by the present invention is that there is a problem that n=2-10 product selectivity is low in the process of synthesizing polyoxymethylene dimethyl ether with methanol and paraformaldehyde as reaction raw materials in the prior art, and a new method for polyoxymethylene is provided. The synthetic method of dimethyl ether

Method used

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  • Method for synthesizing PODE (polyoxymethylene dimethyl ethers)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Preparation of catalyst

[0033] 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%.

[0034] 2. Synt...

Embodiment 2

[0037] 1. Preparation of catalyst

[0038] 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 98 grams of dry base resin, under nitrogen protection, be 2 grams of Mn(OH) containing Mn with 300ml 2 The aqueous suspensions were mixed, 1 drop of glacial acetic acid was added, mixed, left to stand at room temperature for 24 hours, and dried in a vacuum oven to constant weight to obtain a catalyst with a Mn content of ...

Embodiment 3

[0042] 1. Preparation of catalyst

[0043] 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, with 300ml of Tc containing Tc is 2 grams of Tc (OH) 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 Tc content of 2w%.

[0044] 2. Syn...

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Abstract

The invention relates to a method for synthesizing PODE (polyoxymethylene dimethyl ethers) and mainly solves the problems of low catalyst activity and low selectivity of a technology for synthesizingPODE from methanol and 1,3,5-trioxane as reaction raw materials in the prior art. According to the technical scheme of the method for synthesizing PODE, methanol and 1,3,5-trioxane are taken as raw materials, the raw materials are contacted with a PODE catalyst to be subjected to a reaction, and PODE is produced; the catalyst is sulfonic acid type polystyrene cation exchange resin modified with modified metal ions, and the sulfonic acid type polystyrene cation exchange resin contains a crosslinked polystyrene skeleton and a sulfonic acid group; modified metal comprises at least one metal selected from IB and VIIB. With the adoption of the technical scheme, the method for synthesizing PODE can be applied to industrial production of PODE.

Description

technical field [0001] The invention relates to a synthetic method for 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 高晓晨缪晓春石竹吴征柏诗哲朱桂莲范弢高焕新
Owner CHINA PETROLEUM & CHEM CORP
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