Chloropropanediol purifying apparatus and production method thereof

Abstract

The invention discloses a chloropropanediol purifying apparatus and a production method thereof. The apparatus comprises a hydrolysis kettle, a hydrolysate header tank, ion exchange columns, a distillation still and a condenser which are connected through a pipeline, the output pipeline of the condenser is connected with a front fraction pot and a finished product pot, and the front fraction pot and the finished product pot are respectively connected with a vacuum set. The production method comprises the following steps: respectively pumping softened water, sulfuric acid and an aqueous solution of p-toluenesulfonic acid into the hydrolysis kettle according to a ratio, stirring, heating, adding chloropropylene oxide to the hydrolysis kettle for a reaction, and continuously heating for a new reaction after reaction ending; putting the obtained hydrolysate in the ion exchange columns for ion exchange; adding the obtained ion exchange liquid to the distillation kettle, starting stirring, carrying out steam heating, and starting a hydraulic jet vacuum pump; stopping the hydraulic jet vacuum pump when there is no liquid drop between the condenser and a reception pot, and sequentially starting roots vacuum sets; and conveying the obtained material to the front fraction pot, and switching the front fraction pot to the finished product pot.

Description

technical field [0001] The invention relates to a production method of chlorinated glycerol, in particular to a chlorinated glycerin purification device and a production method thereof, belonging to the technical field of chemical industry. Background technique [0002] Chloroglycerol (chemical name 3-chloro-1,2-propanediol) contains -Cl group and two hydroxyl groups in its molecule, and its structural characteristics determine that it is a valuable chemical intermediate. As a pharmaceutical intermediate, it is used in the production of guaiacol glyceryl ether for expectorant and cough medicine, theophylline and prohydroxyphylline for anti-asthma, and the production of non-ionic contrast agents such as iohexol and ioversol; as basic raw materials, Production of plasticizers, surfactants, dyes, etc.; together with bis-(p-hydroxyphenyl)-trichloroethane to synthesize self-extinguishing epoxy resin; also used as a solvent for the production of cellulose acetate, etc. In re...

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Problems solved by technology

[0004] The problem to be solved by the present invention is aimed at problems such as low product purity, high impurity content, low raw material conversion rate, low product yield, poor economic benefit, increased yield and increased cost in the production of domestic chlorinated glycerin industry, Provide a chlorinated glycerol purification device capable of improving product purity, reducing the amount and content of impurities, reducing the amount of waste residue generated in production, reducing product cost, improving product economic benefits, shortening production cycle, and improving equipment utilization

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