72556-74-2Relevant articles and documents
A phosphorus chloride calcium salt of alkali acid radical gallbladder method for preparing four hydrate
-
Paragraph 0027-0032, (2017/02/24)
The invention relates to a method for preparing phosphorylcholine chloride calcium salt tetrahydrate. The method is characterized by consisting of the following steps: (1) dropwise adding a phosphoric acid solution of anhydrous choline chloride into orthophosphoric acid, and reacting at the temperature of 130-180 DEG C, so as to produce phosphorylcholine chloride; (2) enabling a reaction solution to be subjected to neutralization reaction with a proper amount of calcium chloride, calcium carbonate and calcium hydroxide in water; (3) after neutralization reaction, carrying out solid-liquid separation, and refining filter cakes, so as to obtain calcium dihydrogen phosphate or dicalcium phosphate; (4) filtrating a filtrate, obtained through filtrating, with a filter, and then, concentrating and dehydrating; (5) crystallizing a concentrated solution by adding an alcohol solvent, thereby obtaining the product. The method has the advantages that the process flow is simple, waste gases, waste water and waste residues are not generated, and the product quality meets the requirements of crude drug production.