Phosphoric Acid → Hydrochloric Acid

HRID 344968Notes

Reaction equation

HRID 344968 reaction equation
[Cl-:1].[K+:2].[P:3](=[O:7])([OH:6])([OH:5])[OH:4].[P].[K]>>[P:3]([O-:7])([O-:6])([O-:5])=[O:4].[K+:2].[K+:2].[K+:2].[ClH:1]

Participants

6

Reactant 4

HCID 1004Phosphoric AcidHCID 4873Potassium ChlorideHCID 5462222PotassiumHCID 5462309Phosphorus

Product 2

HCID 313Hydrochloric AcidHCID 62657Potassium Phosphate, Tribasic

Procedure

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.

Workup

  1. customat a temperature of about 130° to about 200° C.

Sources & evidence

ORD record
ord-c3b26be7bdf74ddaa0585d662e14c2e8
Source dataset
uspto-grants-1991_10
Patent number
US05055124

Reaction notes

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