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Preparation and refining method of ethylene glycol mono-t-butyl ether

A technology of mono-tert-butyl ether and ethylene glycol, which is applied in the field of preparation and refining of ethylene glycol mono-tert-butyl ether, and can solve the problems of low ETB yield, low ETB selectivity, and high energy consumption for refining ethylene glycol

Inactive Publication Date: 2017-12-05
孙广
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] This process has ETB selectivity lower (83~85%), by-products such as DBE and C8 (diisobutylene) generate more (15~30%), refined ethylene glycol energy consumption is higher and ETB yield is lower low problem

Method used

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  • Preparation and refining method of ethylene glycol mono-t-butyl ether
  • Preparation and refining method of ethylene glycol mono-t-butyl ether
  • Preparation and refining method of ethylene glycol mono-t-butyl ether

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Embodiment Construction

[0026] The invention provides a method for preparing ethylene glycol mono-tert-butyl ether. The method adopts ethylene glycol and mixed C4 as initial reaction materials in the presence of an acidic catalyst, and carries out the process in a reactor after adding tert-butanol and mixing. Etherification reaction, followed by separation and purification to obtain ethylene glycol mono-tert-butyl ether.

[0027] The reaction material mixture C4 of the present invention is a commonly used liquefied petroleum gas in petrochemical industry. The volume content of isobutene in the mixed C4 is 20-99.99%, and in some embodiments the volume content of the isobutene in the mixed C4 is 30-99.99%.

[0028] In some embodiments, the acidic catalyst is an acidic ion exchange resin, heteropolyacid, heteropolyacid salt or molecular sieve. Acidic ion exchange resins are preferred, and polystyrenesulfonic acid-based ion exchange resins are more preferred.

[0029] In some embodiments, in the starti...

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Abstract

The invention relates to the field of petrochemical industry and provides a preparation and refining method of ethylene glycol mono-t-butyl ether. Under an acid catalyst, glycol, mixed C4 and a third component tert-butyl alcohol undergo an etherification reaction at a certain ratio at the temperature of 10-60 DEG C, at the pressure of 0.2-1.5 MPa and at the space velocity of 0.1-10.0 h<-1>; and finally ethylene glycol mono-t-butyl ether is obtained through separation and refining. By the addition of the third component tert-butyl alcohol, generation of by-products is effectively inhibited, and reaction selectivity of ethylene glycol mono-t-butyl ether is enhanced. The refining technology is simple, has low energy consumption, and is environmentally friendly.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to a method for preparing and refining ethylene glycol mono-tert-butyl ether. Background technique [0002] Aromatic solvents have high photochemical activity. In recent years, some countries have restricted their use in order to prevent air pollution caused by their emissions. In order to find suitable alternative products, ethylene glycol mono-tert-butyl Ether bases (ETB) are gradually being valued and widely used in coatings, inks, washing and other industries. [0003] Although many companies have successively explored and developed more preparation methods of ethylene glycol mono-tert-butyl ether, few are suitable for industrial applications. At present, the target product is mainly prepared by reacting ethylene glycol and isobutylene under an acidic catalyst. [0004] The production and utilization of ethylene glycol tert-butyl ether abroad, Shen Jingyu. Fine Petrochem...

Claims

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Application Information

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IPC IPC(8): C07C41/06C07C41/42C07C43/13
CPCC07C41/06C07C41/42C07C43/13
Inventor 孙广
Owner 孙广
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