Method for separating glycol from butanediol

A separation method and technology for butanediol, applied in the field of separation of ethylene glycol and butanediol, can solve the problems of high energy consumption, complex process and high separation energy consumption, and achieve low energy consumption, simple process and simple separation process. Effect

Inactive Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that when ethylene glycol and butanediol are separated by azeotropic rectification, the process is complicated and the energy consumption is high, especially when the content of butanediol in the mixture is low, the separation energy consumption is high, and a new method is provided. Separation method of ethylene glycol and butanediol

Method used

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  • Method for separating glycol from butanediol
  • Method for separating glycol from butanediol
  • Method for separating glycol from butanediol

Examples

Experimental program
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Effect test

Embodiment 1

[0017] according to figure 1 Shown flow process, the ethylene glycol solution containing 1,2-butanediol (the mass content of 1,2-butanediol is 1.00%) is that 15 millimeters, height are 150 millimeters with the flow rate of 5 g / min The top of the adsorption column enters, and the adsorption column is filled with Suqing brand DA201-C resin, the operating pressure is normal pressure, the temperature is 40 ° C, and the mass fraction of ethylene glycol obtained at the bottom of the column is 99.99%.

Embodiment 2

[0019] according to figure 1 Shown flow process, the ethylene glycol solution containing 1,2-butanediol (the mass content of 1,2-butanediol is 0.10%) is 15 millimeters from inside diameter, height is 100 millimeters with the flow rate of 5 g / min The top of the adsorption column enters, and the adsorption column is filled with Suqing brand DA201-A resin, the operating pressure is 1MPa, the temperature is 20°C, and the mass fraction of ethylene glycol obtained at the bottom of the column is 100.00%.

Embodiment 3

[0021] according to figure 1 Shown flow process, the ethylene glycol solution containing 1,2-butanediol (the mass content of 1,2-butanediol is 3.00%) is 15 millimeters from inner diameter, height is 200 millimeters with the flow rate of 5 g / min The top of the adsorption column enters, and the adsorption column is filled with Suqing brand DA201-D resin, the operating pressure is 0.5MPa, the temperature is 80°C, and the mass fraction of ethylene glycol obtained at the bottom of the column is 99.99%.

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Abstract

The invention relates to a method for separating glycol from butanediol. By the method, the problems of a complex process and high energy consumption during the separation of the glycol and the butanediol by azeotropic rectification and particularly high separation energy consumption due to low content of the butanediol in a mixture at present are mainly solved. In the method, a glycol solution with less than or equal to 3 percent of butanediol contacts an adsorption column filled with an adsorbent, the butanediol is adsorbed by resin, raffinate is the glycol, and the adsorbent is selected from at least one of nonfunctional resin or a molecular sieve. Through the technical scheme, the problems are better solved. The method can be used for the industrial production of separating the glycol from the butanediol.

Description

technical field [0001] The invention relates to a method for separating ethylene glycol and butanediol. Background technique [0002] Ethylene glycol (EG) is an important organic chemical raw material, mainly used in the production of polyester fiber, antifreeze, unsaturated polyester resin, lubricant, plasticizer, nonionic surfactant and explosives, etc. It can be used in industries such as paint, photographic developer, brake fluid and ink, as a solvent and medium for ammonium perborate, and for the production of special solvents such as glycol ether, etc., and has a wide range of uses. [0003] At present, large-scale ethylene glycol production at home and abroad adopts the process route of direct hydration or pressurized hydration. This process is to prepare a mixed aqueous solution of ethylene oxide and water at a ratio of 1:20 to 22 (molar ratio) in a fixed bed. React in the reactor at 130-180°C, 1.0-2.5MPa for 18-30 minutes, all ethylene oxide is converted into mixed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/76
Inventor 钟禄平肖剑卢咏琰
Owner CHINA PETROLEUM & CHEM CORP
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