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New green synthesis process of dimethoxyethane

A technology for ethylene glycol dimethyl ether and green synthesis, which is used in ether preparation, alkylene oxide preparation of ether, organic chemistry, etc., and can solve problems such as difficulty in separation and purification, environmental pollution, and complex products.

Pending Publication Date: 2020-02-11
NANJING POLYTECHNIC INSITUTE
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Although this synthesis method has easy-to-obtain raw materials and a simple and easy-to-operate process, the product is complex, separation and purification are difficult, and the catalyst severely corrodes the equipment, especially the unavoidable production of dioxane or dioxolane, causing environmental pollution.

Method used

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  • New green synthesis process of dimethoxyethane

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Embodiment Construction

[0017] A new green synthesis process of ethylene glycol dimethyl ether. It includes ethylene oxide storage tanks, dimethyl ether storage tanks, sprayers, rotameters, nitrogen cylinders, heaters, reactors, coolers, separation traps, and the equipment is connected in sequence through pipelines.

[0018] Among them, the high-temperature reactor is a tubular fixed-bed reactor; ethylene oxide and dimethyl ether are injected into the system through high-pressure nitrogen, and are vaporized by the sprayer respectively, and then further gasified and mixed by the heater; the high-temperature product is cooled by the condenser captured after processing.

[0019] The specific process of the process is as follows figure 1 :

[0020] Replace the 0.5 L stainless steel autoclave with nitrogen to replace the air in the autoclave; use nitrogen pressure to feed the metered liquid catalyst, nitrogen pressure to feed the metered dimethyl ether, turn on the stirring, turn on the cooling water, t...

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Abstract

The invention discloses a new green synthesis process of dimethoxyethane (DME). The process involves an ethylene oxide storage tank, a dimethyl ether storage tank, a sprayer, a rotor flow meter, a nitrogen steel cylinder, a heater, a reactor, a cooler and a separation catcher that are sequentially connected through a pipeline.

Description

technical field [0001] The invention belongs to the field of organic synthesis in the chemical industry, and specifically relates to a new green synthesis process of ethylene glycol dimethyl ether. Background technique [0002] Ethylene glycol dimethyl ether (DME for short) has stable chemical properties and solubility. It is a colorless aprotic polar solvent. It can also be used as a gas adsorbent, additive, cleaning agent, catalyst, etc., and is widely used in various chemical industries. industrial field. [0003] With the advancement of science and technology and the development of society, the application of ethylene glycol dialkyl ether continues to expand, and the quantity and quality of market demand in medicine, pesticides, dye intermediates, electronic chemicals, paints, inks, etc. are constantly increasing. . In addition, in recent years, due to the reduction of production capacity in the United States, Western Europe and Japan, the production of ethylene glycol...

Claims

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Application Information

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IPC IPC(8): C07C41/02C07C43/10B01J35/02B01J21/06
CPCC07C41/02B01J21/066B01J35/40B01J35/50C07C43/10
Inventor 王建鑫任春梅张福磊
Owner NANJING POLYTECHNIC INSITUTE
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