Process for preparing potassium peroxomonosulfate triple salt

Details Process for preparing potassium peroxomonosulfate triple salt Process for preparing potassium peroxomonosulfate triple salt

1996-02-06

1997-03-04

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423551, C01D 500

Patent

active

056076568

ABSTRACT:
A process for preparing the potassium peroxomonosulfate triple salt 2 KHSO.sub.5 .multidot.KHSO.sub.4 .multidot.K.sub.2 SO.sub.4 by partial neutralization of sulfuric acid-Caro's acid fed to a working solution containing KHSO.sub.5, KHSO.sub.4 and K.sub.2 SO.sub.4 with caustic potash solution and evaporation of water. The cold crystallization procedure (15.degree. C. or below) hitherto required is avoided and a high active oxygen yield is produced by using sulfuric acid-Caro's acid with 50 to 70 wt. % of H.sub.2 SO.sub.5 and 15 to 30 wt. % of H.sub.2 SO.sub.4 and a working solution with a concentration of 28 to 38 wt. % of KHSO.sub.5, 18 to 28 wt. % of KHSO.sub.4 and greater than 0 to 3 wt. % of K.sub.2 SO.sub.4 and supplying additional sulfuric acid, wherein the molar ratio of H.sub.2 SO.sub.5 to added H.sub.2 SO.sub.4 to KOH is 3 to 1:3 to 5:8.

REFERENCES:
patent: 3041139 (1962-06-01), D'Addieco
patent: 4610865 (1986-09-01), Reh et al.
patent: 5139763 (1992-08-01), Amini

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