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Method for utilizing high-boiling-point glycerol asphalt generated by rectification in production process of epoxy chloropropane

A technology of epichlorohydrin and production process, which is applied in the field of utilization of epichlorohydrin production waste, can solve the problems of reducing hazardous waste disposal and high cost, and achieves reducing hazardous waste disposal, enhancing waterproofness, and making up for pinholes or air bubbles. The effect of defects

Active Publication Date: 2020-10-16
ZHEJIANG HAOBANG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problem that the waste glycerol pitch produced by epichlorohydrin needs to be treated as hazardous waste with high cost, the present invention provides a method for utilizing high-boiling point glycerol pitch produced by rectification in the production process of epichlorohydrin. Production waste glycerin asphalt is used as the main raw material for the preparation of polyurethane waterproof coatings, turning waste into treasure and reducing hazardous waste disposal

Method used

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  • Method for utilizing high-boiling-point glycerol asphalt generated by rectification in production process of epoxy chloropropane

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Embodiment 1

[0021] A method for utilizing the high-boiling glycerol asphalt produced by rectification in the production process of epichlorohydrin, comprising the following steps:

[0022] (1) Get the rectification high boiler produced after the rectification and refining of the product dichloropropanol rectification and refining of the glycerol method to produce epichlorohydrin in the chlorination reaction stage, and distill at 140° C. to obtain high-boiling glycerol asphalt;

[0023] (2) In parts by weight, take 50 parts of glycerol pitch, 10 parts of isocyanate, and 40 parts of heavy calcium, mix them uniformly, stir and react at 70°C for 3 hours, then add 15 parts of epichlorohydrin and react at 100°C for 2 hours to obtain a reaction mixture;

[0024] (3) After cooling the reaction mixture to 50°C, add 8 parts of plasticizer dibutyl phthalate, 20 parts of filler quartz powder, 0.1 part of auxiliary polydimethylsiloxane defoamer and 30 parts of solvent toluene The parts are stirred eve...

Embodiment 2

[0026] (1) Get the rectification high boiler produced after the rectification and refining of the product dichloropropanol rectification and refining of the glycerol method to produce epichlorohydrin in the chlorination reaction stage, and distill at 130° C. to obtain high-boiling glycerol pitch;

[0027] (2) In parts by weight, take 50 parts of glycerol pitch, 20 parts of isocyanate, and 50 parts of heavy calcium, mix them evenly, stir and react at 60°C for 5 hours, then add 10 parts of epichlorohydrin and react at 90°C for 2 hours to obtain a reaction mixture;

[0028] (3) After cooling the reaction mixture to 60°C, add 5 parts of plasticizer butyl benzyl phthalate, 17 parts of filler bentonite, 0.1 part of auxiliary agent isophorone leveling agent and 20 parts of solvent ethyl acetate and stir Evenly, defoam under the vacuum condition of -0.09MPa for 30 minutes, discharge the material, and prepare polyurethane waterproof coating, which can be applied by scraping or spraying....

Embodiment 3

[0030] (1) Get the rectification high boiler produced after the rectification and refining of the product dichloropropanol rectification and refining of the glycerol method to produce epichlorohydrin in the chlorination reaction stage, and distill at 150° C. to obtain high-boiling glycerol asphalt;

[0031] (2) In parts by weight, take 50 parts of glycerol pitch, take 50 parts of dehydrated glycerol pitch, mix with 15 parts of isocyanate and 45 parts of heavy calcium, stir and react at 100°C for 1h, then add 12 parts of epichlorohydrin at 80°C Reaction 3h, obtains reaction mixture;

[0032] (3) After cooling the reaction mixture to 70°C, add 10 parts of plasticizer dibutyl phthalate, 15 parts of filler bentonite and modified bentonite, 2 parts of auxiliary polyacrylamide dispersant and 25 parts of solvent toluene Stir evenly and discharge the material to obtain a polyurethane waterproof coating, which can be applied by scraping or spraying. Wherein the mass ratio of bentonite...

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Abstract

The invention relates to utilization of epichlorohydrin production waste. In order to solve the problem of high cost caused by dangerous waste disposal of waste glycerol asphalt in epoxy chloropropaneproduction, the invention provides a method for utilizing high-boiling-point glycerol asphalt generated by rectification in production process of epoxy chloropropane. The method comprises the following steps: distilling a rectified high-boiling-point substance generated in the epoxy chloropropane production process to obtain glycerol asphalt; uniformly mixing 50 parts of glycerol asphalt with 10-20 parts of isocyanate and 40-50 parts of ground calcium carbonate, and stirring and reacting at 60-100 DEG C for 1-5 hours to obtain a reaction mixture; and cooling the reaction mixture to 50-70 DEGC, adding 5-10 parts of a plasticizer, 15-20 parts of a filler, 0.1-2 parts of an auxiliary agent and 20-30 parts of a solvent, uniformly stirring, and discharging to obtain a polyurethane waterproofcoating. According to the invention, the epoxy chloropropane production waste glycerol asphalt is used as a main raw material for preparing the polyurethane waterproof coating, so that waste is turnedinto wealth, and hazardous waste disposal is reduced.

Description

technical field [0001] The invention relates to the utilization of epichlorohydrin production waste materials, in particular to a utilization method of high-boiling-point glycerin asphalt produced by rectification in the production process of epichlorohydrin. Background technique [0002] The production of epichlorohydrin by the glycerol method is mainly divided into two steps: chlorination reaction and cyclization reaction. During the chlorination reaction, glycerin and hydrogen chloride gas are used to obtain dichloropropanol under the action of an acidic catalyst. Dichloropropanol often needs to be refined before the cyclization reaction. After dichloropropanol is refined by rectification, tower bottom residue will be produced. According to the "National List of Hazardous Wastes (2016 Edition)", the tower bottom residue is hazardous waste. If the tower bottom residue is not processed into other products, it needs Disposal as hazardous waste has high disposal costs. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/62C08G18/64C08G18/83
CPCC08G18/6476C08G18/831C08K2003/265C08K2201/014C09D175/04C09D7/61C09D7/62C08K3/36C08K3/26C08K3/346C08K13/06C08K9/04
Inventor 林锦堂黄华章吴京春吕少微
Owner ZHEJIANG HAOBANG CHEM
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