Process for preparing potassium peroxomonosulfate triple salt
Patent 5607656 Issued on March 4, 1997. Estimated Expiration Date: 
February 6, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 6, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3041139 Process for the production of potassium peroxymonosulphate triple salt Class of stable potassium monopersulfate compositions Patent #: 5139763 InventorsAssigneeApplicationNo. 597201 filed on 02/06/1996US Classes:423/513, Persulfate423/551Alkali metal containing (Li, Na, K, Rb, or Cs)ExaminersPrimary: Straub, Gary P.Assistant: Vanoy, Timothy C. Attorney, Agent or FirmForeign Patent References
International ClassC01D 005/00Foreign Application Priority Data1995-02-07 DEAbstractA process for preparing the potassium peroxomonosulfate triple salt 2 KHSO5 ⋅KHSO4 ⋅K2 SO4 by partial neutralization of sulfuric acid-Caro's acid fed to a working solution containing KHSO5, KHSO4 and K2 SO4 with caustic potash solution and evaporation of water. The cold crystallization procedure (15° 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 H2 SO5 and 15 to 30 wt. % of H2 SO4 and a working solution with a concentration of 28 to 38 wt. % of KHSO5, 18 to 28 wt. % of KHSO4 and greater than 0 to 3 wt. % of K2 SO4 and supplying additional sulfuric acid, wherein the molar ratio of H2 SO5 to added H2 SO4 to KOH is 3 to 1:3 to 5:8. |
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