Phosphoric Acid → Hydrochloric Acid

Participants

Reaction Steps

Accordingly, in one aspect of the present invention, there is provided a process for the production of potassium phosphate, which comprises (a) reacting potassium chloride with phosphoric acid in a molar feed ratio of phosphorus to potassium in the range of at least about 1.3:1 at a temperature of about 130° to about 200° C. to form potassium phosphate and by-product hydrogen chloride; (b) removing the hydrogen chloride from the reaction mixture by passing air through the reaction mixture during a first portion of the period for the reaction of the potassium chloride and by passing steam through the reaction mixture during the remainder of the period of the reaction of the potassium chloride; and (c) recovering the stripped hydrogen chloride in the form of hydrochloric acid having a concentration of at least about 20 wt. % HCl.

Provenance & Evidence