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Process method for synthesizing polyoxymethylene dimethyl ether from methanol

A technology of polyoxymethylene dimethyl ether and process method is applied in chemical instruments and methods, preparation of organic compounds, organic compounds/hydrides/coordination complex catalysts, etc., and can solve the problem of high cost and low yield of synthetic process products. problem, to achieve the effect of high yield and selectivity, low production cost and good technical effect

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is the problem of high product cost and low yield of polyoxymethylene dimethyl ether synthesis process, and a new process for synthesizing polyoxymethylene dimethyl ether is provided, which has the characteristics of low product cost and high yield

Method used

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  • Process method for synthesizing polyoxymethylene dimethyl ether from methanol
  • Process method for synthesizing polyoxymethylene dimethyl ether from methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Preparation of catalyst

[0040] Wash the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until clear water flows out, then soak it with 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of sodium sulfonate polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, and then washed with deionized water until there is no chloride ion in the eluate, 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 Mix the aqueous suspension, 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 obtain a catalyst with a Cu content of 2w%.

[0041] 2. Synthesis of polyoxymethylene dimethyl ...

Embodiment 2

[0045] 1. Preparation of catalyst

[0046] Wash the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until clear water flows out, then soak it with 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of sodium sulfonate polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, and then washed with deionized water until there is no chloride ion in the eluate, 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 Mix the aqueous suspension, 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 obtain a catalyst with a Cu content of 2w%.

[0047] 2. Synthesis of polyoxymethylene dimethyl ...

Embodiment 3

[0051] 1. Preparation of catalyst

[0052] Wash the sodium sulfonate polystyrene cation exchange resin 7320 with deionized water until clear water flows out, then soak it with 4w% hydrochloric acid four times, each use is equivalent to 10 times the dry weight of sodium sulfonate polystyrene cation exchange resin 7320 4w% hydrochloric acid, soaked for 4 hours each time, and then washed with deionized water until there is no chloride ion in the eluate, 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 Mix the aqueous suspension, 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 Mn content of 2w%.

[0053] 2. Synthes...

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Abstract

The invention relates to a process method for synthesizing polyoxymethylene dimethyl ether, which solves the problem of high synthesis cost and low yield of polyoxymethylene dimethyl ether, adopts a process method for synthesizing polyoxymethylene dimethyl ether from methanol, and the process is divided into a reaction zone and a separation zone The reaction zone includes a methanol storage tank, a preheater, a fixed-bed reactor and a bubbling reactor; the process step in the reaction zone is that methanol enters the fixed-bed reactor after being preheated, vaporized and mixed with air, and is catalyzed and oxidized by a formaldehyde synthesis catalyst to form formaldehyde , into the bubbling reactor, in the bubbling reactor, methanol and the recycled mixture are catalyzed by a solid acid catalyst to generate polyoxymethylene dimethyl ether; the separation zone includes an anion exchange resin bed, a rectification module, and a product storage tank; separation The process steps in the zone are that the discharge of the bubble reactor is deacidified by anion exchange resin and then enters the rectification module for separation, the trimer and tetramer of polyoxymethylene dimethyl ether enter the product storage tank, and other components are recycled to the bubble reactor. The technical scheme is used in the production of polyoxymethylene dimethyl ether.

Description

technical field [0001] The invention relates to a process for synthesizing polyoxymethylene dimethyl ether from methanol. Background technique [0002] In recent years, low-carbon has become a major social theme and has gained increasing attention. For example, how to reduce the highly polluting exhaust emissions brought about by the booming automobile manufacturing industry and how to improve the efficiency of fuel oil use has become a research topic of many institutions. [0003] It is generally accepted that oxygenates are very suitable as diesel blending components. At present, many companies and research institutes are investing in finding and screening suitable oxygen-containing compounds, and the screening objects include: acetals, alcohols, carbonates, lipids, ethers, glycol derivatives, etc. For diesel, oxygenated compounds need to have high cetane number, low self-ignition point, and fast ignition. In addition, it should have good miscibility with ordinary diese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/56C07C43/30B01J31/10B01J37/30
CPCC07C41/56B01J31/10B01J37/30B01J2231/4288C07C43/30
Inventor 高晓晨吴征缪晓春
Owner CHINA PETROLEUM & CHEM CORP
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