Production method of dichloropropanol

A technology of dichloropropanol and its production method, which is applied in the chemical industry and can solve the problems of increased investment in equipment, increased energy consumption, and ignorance of effective effects, etc.

CN101805243AActive Publication Date: 2010-08-18NINGBO HUANYANG CHEM

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: NINGBO HUANYANG CHEM
Publication Date: 2010-08-18

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Abstract

The invention relates to a production method of dichloropropanol, comprising the following reaction steps: glycerol reacts with gaseous HCl in the presence of organic carboxylic acid catalyst, reaction liquid reactant reacts with gaseous HCl in the presence of Lewis acid catalyst and then reacts with gaseous HCl again under the action of microwave and the stirring action; after passing through a low-boiling-point substance distillation tower and a rectifying tower, the mixture is prepared into the product of the invention. Compared with the prior art, HCl conversion rate is improved by about one time. When the combined catalysis technology of the invention is adopted, the dosage of the organic carboxylic acid catalyst is lowered by half, glycerol conversion rate is improved by 2%, and product yield is improved by 5%; and meanwhile, side reaction is reduced so as to avoid the defect that extra potentially toxic organic carboxylic acid side reaction generates a great quantity of waste, thus protecting environment.

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Description

【Technical field】

[0001] The invention belongs to the technical field of chemical industry. More particularly, the present invention relates to a kind of production method of dichloropropanol. 【Background technique】

[0002] The invention relates to a production method for producing mainly 1,3-dichloro-2-propanol isomers through nucleophilic substitution reaction of renewable raw material glycerin and gaseous hydrogen chloride. Dichloropropanol is used to produce epichlorohydrin, and epichlorohydrin is the raw material for producing epoxy resin. Epoxy resin is mainly used in electronics, electrical industry, building materials, new materials, wind power equipment, epichlorohydrin is also used It is used in the production of surfactants and synthetic rubber, and is widely used in the fields of daily chemical and light industry technology.

[0003] At present, traditional epichlorohydrin is prepared from dichloropropanol produced from propylene extracted from petroleum. [...

Claims

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