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Method for decolorizing epoxy chloropropane with hydrogen peroxide

A technology of epichlorohydrin and hydrogen peroxide, which is applied in the direction of organic chemistry, can solve the problems of color impurities and high chroma of epichlorohydrin, and achieve the effects of guaranteed total yield, high safety, and improvement of high chroma

Pending Publication Date: 2022-03-01
JIANGSU RUIXIANG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention proposes a method for decolorizing epichlorohydrin hydrogen peroxide, which solves the problem that the glycerol method epichlorohydrin has a high chroma and contains colored impurities

Method used

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  • Method for decolorizing epoxy chloropropane with hydrogen peroxide

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Effect test

Embodiment 1

[0029] Epoxyne chloropropanes of the chromaticity 40 were added to 2% bioxyhydrate 100g, 0.4 g of sodium hydroxide, stirring and warmed up to 35 ° C, holding 2 h, retained after retail oil, oil layer dehydration, product chrominance value 5, ring The yield of oxychlorochlorophyne is 98.9%.

Embodiment 2

[0031] The chloropropane of the chromaticity 40, adding 2% dual oxygen water 100g, stirring and warping to 35 ° C, holding 2 h, retained afterward, oil layer dehydration, product chloropropane yield 99.0 %.

Embodiment 3

[0033] Epoxyoxropane of the chromaticity 40, add 5% hydrogen peroxide 100g, sodium hydroxide 10g, stirring to warm up to 35 ° C, heat insulation 0.2h, retained oil, oil layer dehydration, product chrominance value 5, ring The oxychloroprice yield was 95.4%.

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Abstract

The invention provides a method for decolorizing epoxy chloropropane with hydrogen peroxide, which is characterized by comprising the following specific processes: adding hydrogen peroxide into epoxy chloropropane with high chroma, layering the obtained reaction liquid to obtain a lower oil phase, and dehydrating and rectifying to obtain epoxy chloropropane; the chromaticity of the epoxy chloropropane with relatively high chromaticity is 25 to 50. According to the invention, the hydrogen peroxide reacts with trace colored impurities in the epichlorohydrin under the action of alkali catalysis to decolorize the epichlorohydrin, so that the problem of high chromaticity of the epichlorohydrin is effectively improved; the provided technological process is simple, the safety is high, existing equipment does not need to be modified much, and the investment cost is low; in the provided process flow, the water layer can be recycled after the reaction liquid is layered, and meanwhile, the water layer containing the glycerol intermediate can be subjected to a crude glycerol pre-chlorination procedure after steam stripping, so that the total yield of the product is ensured.

Description

Technical field [0001] The present invention relates to the field of ethylene chloropropane production, and more particularly to a method of decolorizing epoxy chloropropane hydrogenulfol. Background technique [0002] Epochloropropane (3-chloro-1,2-propylene oxide, Epichlorohydrin) is mainly used to prepare epoxy resin, chlorohydrin rubber, polyether polyol, kiobulus, and mouse mice; simultaneous Organic solvent (resin, gum, cellulose ester, cellulose ether, etc.); also used to manufacture nitrogenated glycerin explosives, glass steel, methacrylate, chlorohyde rubber, glycid derivative, surfactant, electricity Insulation products, etc. It is an important organic synthetic raw material and intermediate. [0003] The glycerol method is used in the epoxyhydrin process, which is difficult to remove the micro-colored impurities, which is difficult to remove micro-colored impurities by distillation, rectification, etc., resulting in a part of the product chromaticity does not meet cus...

Claims

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Application Information

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IPC IPC(8): C07D301/32C07D303/08
CPCC07D301/32C07D303/08
Inventor 申高忠王怡明刘原张志强邱满意张磊张晓阳张巍伟李正启
Owner JIANGSU RUIXIANG CHEM
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