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Preparation process of heterogeneous ethylene glycol dimethyl ether

A technology of ethylene glycol dimethyl ether and preparation process, which is applied in the directions of ether preparation, alkylene oxide preparation of ether, ether separation/purification, etc., can solve the problems of environmental pollution, complex products, difficulty in separation and purification, etc., and improve production capacity , The effect of easy separation and no corrosion of equipment

Inactive Publication Date: 2021-06-22
NANJING POLYTECHNIC INSITUTE
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  • Abstract
  • Description
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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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  • Preparation process of heterogeneous ethylene glycol dimethyl ether

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Embodiment Construction

[0018] A process for preparing heterogeneous ethylene glycol dimethyl ether. It includes an ethylene oxide storage tank, a dimethyl ether storage tank, an evaporator, a rotameter, a nitrogen cylinder, a superheater, a reactor, a cooler, and a separation trap, and the equipment is connected in sequence through pipelines.

[0019] Among them, the high-temperature reactor is a fluidized bed reactor; ethylene oxide and dimethyl ether are injected into the system through high-pressure nitrogen, and are respectively vaporized by the evaporator, and then further gasified and mixed by the superheater; the high-temperature product is cooled by the condenser captured later.

[0020] The specific flow of the process is as follows:

[0021] The particle diameter that the spray drying method makes is in the solid acid catalyst ZrO of 60um 2 / TiO 2 Load 10mL of microspheres from the top to the bottom grid of the fluidized bed reactor; gradually open the nitrogen cylinder to increase the ...

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Abstract

The invention discloses a preparation process of heterogeneous ethylene glycol dimethyl ether. An ethylene oxide storage tank, a dimethyl ether storage tank, an evaporator, a rotor flow meter, a nitrogen steel cylinder, a superheater, a reactor, a cooler and a separation trap which are sequentially connected through pipelines.

Description

technical field [0001] The invention belongs to the field of organic synthesis in the chemical industry, and in particular relates to a preparation process of heterogeneous 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/10C07C41/02C07C41/34
CPCC07C41/02C07C41/34C07C43/10
Inventor 任春梅张福磊
Owner NANJING POLYTECHNIC INSITUTE
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