C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
23/99
C01D 5/02 (2006.01) C01B 15/08 (2006.01)
Patent
CA 1229216
ABSTRACT Process for the production of potassium peroxymono- sulphate triple salt The present invention provides a process for the production of the triple salt 2KHSO5.KHSO4.K2SO4 from sulphuric acid, hydrogen peroxide and potassium hydroxide, wherein, for continuous production, an aqueous working solution which contains KHSO5, sulphuric acid and potassium sulphate in a molar ratio of 1.3 to 2.5/1.2 to 2.0/1, is concentrated in an evaporation plant under reduced pressure and at a temperature of at most 40°C. to a concentration which corresponds to a content of 20 to 30% by weight of KHSO5, a partial stream is removed from the concen- trated solution and from this, by cooling to a temperature below 15°C., the triple salt is precipit- ated out and separated, the mother liquor obtained is combined with the remaining solution, the solution is reconstituted by the addition of 90 to 100% sulphuric acid, 30 to 90% hydrogen peroxide and concentrated aqueous potassium hydroxide solution and recycled to the evaporation plant.
484908
Reh Wolfgang
Schelle Siegfried
Marcoux & Sher Swabey Mitchell Houle
Peroxid-Chemie Gmbh
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