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US Patent 4610865 - Process for the production of potassium peroxymonosulphate triple salt
US Patent Issued on September 9, 1986
Estimated Patent Expiration Date:
June 27, 2005Estimated 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.
Estimated Patent Expiration Date:
June 27, 2005Estimated 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.AbstractThe present invention provides a process for the production of the triple salt 2KHSO5.KHSO4.K.sub.2 SO4 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 maximum 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 concentrated solution and from this, by cooling to a temperature below 15° C., the triple salt is precipitated 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. | InventorsAssigneeApplicationNo. 06/749887 filed on 06/27/1985US Classes:423/513PersulfateField of Search423/513PersulfateExaminersPrimary: Straub, Gary P.Attorney, Agent or FirmUS Patent References2802722, 3002813, 3041139, 3203756International ClassesC01B 15/00 (20060101)C01B 15/08 (20060101) Foreign Application Priority Data1984-07-23 DE |
