C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/99
C01B 15/08 (2006.01)
Patent
CA 1216413
POTASSIUM MONOPERSULFATE COMPOSITIONS AND PROCESS FOR PREPARING THEM Abstract of the Disclosure A storage stable salt melting at 80° to 150°C having the formula (KHSO5)x(KHSO4)y(K2SO4)z where x+y+z=l, and x=0.4-0.97, preferably 0.60-0.85; y=0.03-0.60, preferably 0.15-0.40; z=0-0.10, preferably 0-0.3; and y is >z, which is treated with 1.0-9.0% of a basic magnesium compound which is MgCO3, Mg(OH)2, MgO or mixtures thereof is disclosed. The salt is prepared by neutralizing Caro's acid with a basic potassium compound to form a reaction mixture. Water is evaporated from the reaction mixture at 15° to 35°C using a vacuum of 2-15 mm Hg absolute pressure to form up to 40 wt. % crystals. The crystals are separated, treated with a basic magnesium compound, dried, and further treated with a basic magnesium compound.
470662
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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