METHOD FOR PREPARING HIGH-PURITY ELEMENTAL PHOSPHORUS AND METHOD FOR PREPARING HIGH-PURITY PHOSPHORIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for preparing high-purity elemental phosphorus capable of simultaneously reducing both arsenic and antimony from crude white phosphorus containing a great amount of arsenic and antimony as impurities.;SOLUTION: The method for preparing high-purity elemental phosphorus includes bringing liquid crude white phosphorus into contact with an iodic acid-containing compound selected from iodic acid and iodates in an aqueous solvent in the presence of a chelating agent, wherein the chelating agent is selected from polyvalent carboxylic acids, polyvalent carboxylates, phosphonic acid and phosphonates.;COPYRIGHT: (C)2012,JPO&INPIT