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Method for preparing chloropropylene oxide from biomass glycerol

A technology of epichlorohydrin and biomass, which is applied in the field of preparing epichlorohydrin from biomass glycerol, can solve the problems of high cost of epichlorohydrin preparation and insufficient utilization of raw materials, achieve good industrialization prospects, increase environmental and economic Benefits and less by-products

Inactive Publication Date: 2018-04-13
JIANGSU SOPO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a method for preparing epichlorohydrin from biomass glycerol to reduce the preparation cost of epichlorohydrin and improve Reaction conversion and yield

Method used

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  • Method for preparing chloropropylene oxide from biomass glycerol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Mix 1kg of glycerin and 25g of propionic acid, heat to 115°C and keep it warm, pass hydrogen chloride gas into the system at a flow rate of 300mL / min; bubbling for 72 hours, and absorb the tail gas with lye;

[0024] (2) After the material obtained in step (1) is cooled to room temperature, it is transferred to another reactor, heated to 30°C, and then 1.12L of 10mol / L KOH solution is added to continue the reaction for 30min;

[0025] (3) After the reaction in step (2) is completed, the solid is removed by filtration to obtain an epichlorohydrin solution.

Embodiment 2

[0027] (1) Mix 1kg of glycerin and 35g of acetic acid, heat to 140°C and keep it warm, feed hydrogen chloride gas into the system at a flow rate of 300mL / min; bubbling reaction for 48h, tail gas is absorbed with lye;

[0028] (2) After the material obtained in step (1) is cooled to room temperature, it is transferred to another reactor, heated to 30°C, and then 1.27L of 8mol / L KOH solution is added to continue the reaction for 30min;

[0029] (3) After the reaction in step (2) is completed, the solid is removed by filtration to obtain an epichlorohydrin solution.

Embodiment 3

[0031] (1) Mix 1kg of glycerin and 50g of acetic acid and heat it to 90°C and keep it warm, then pass hydrogen chloride gas into the system at a flow rate of 300mL / min; bubbling for 72 hours, and absorb the tail gas with lye;

[0032] (2) After the material obtained in step (1) is cooled to room temperature, it is transferred to another reactor, heated to 60°C, and then 1.09L of 6mol / L KOH solution is added to continue the reaction for 30min;

[0033] (3) After the reaction in step (2) is completed, the solid is removed by filtration to obtain an epichlorohydrin solution.

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Abstract

The invention provides a method for preparing chloropropylene oxide from biomass glycerol. The method comprises the following steps: first mixing biomass glycerol with organic acid, carrying out heating to 90-140 DEG C, maintaining the temperature, introducing hydrogen chloride gas into the obtained system and starting a bubbling reaction, wherein tail gas is absorbed with alkali liquor; cooling amaterial obtained in the previous step to room temperature, then transferring the material to another reactor, heating the material to 30-90 DEG C, and adding a KOH solution with a concentration of 6-10 mol / L for a reaction; and at the end of the reaction, removing solids through filtration so as to obtain a filtrate which is a chloropropylene oxide solution. The method of the invention has the advantages of simple process, easy availability of raw materials, low cost and good industrialization prospects.

Description

technical field [0001] The invention relates to a preparation method of chemical intermediate epichlorohydrin, more specifically, relates to a method for preparing epichlorohydrin from biomass glycerin. Background technique [0002] Epichlorohydrin is an important fine chemical raw material and intermediate of chemical products, which is widely used. Used in the production of adhesives, positive ion exchange resins and glass fiber reinforced plastics, chlorohydrin rubber, epoxy resins, insulating products, and explosives. Before the development of biomass diesel, epichlorohydrin was used to synthesize glycerin with relatively high price. Due to the improvement of technology, glycerin as a biomass diesel product reached more than 90%. Favored by scientists, the preparation of dichloropropanol and epichlorohydrin with glycerin as raw material, and the development of other chemical product production processes with glycerin as raw material have stepped onto the stage of histor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/08C07D301/26
CPCC07D303/08C07D301/26
Inventor 朱桂生殷恒波凌荣春邵守言刘玲肖稳德唐丽朱言萍
Owner JIANGSU SOPO GRP
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