Back to results
US 4,049,786 AGranted
Process of preparing peroxymonosulfate
AssigneeFMC Corporation
InventorJohn S. Chiang
Life of this patent
Estimating the term…
Abstract
High strength peroxymonosulfate is prepared by adding concentrated sulfuric acid to a solution of a soluble peroxydisulfate whereby the heat of solvation of the sulfuric acid hydrolyzes the peroxydisulfate to the peroxymonosulfate; the temperature is controlled to provide a range of about 140.degree. to 160.degree. F. After about 15 to 45 minutes, the solution is cooled rapidly to about room temperature.
Claims3
In a method of preparing a peroxymonosulfate by rapid hydrolysis of a peroxydisulfate with concentrated sulfuric acid, wherein active oxygen losses during said hydrolysis are suppressed, comprising the steps:
- a. providing a solution of a soluble peroxydisulfate at a temperature of about 100.degree. F.;
- F.;
- b. mixing the peroxydisulfate solution of step (a) with concentrated sulfuric acid in a volume ratio of peroxydisulfate solution to concentrated sulfuric acid of 1 to 0.07 to 1 to 0.15, whereby the heat of solvation of the sulfuric acid initiates the hydrolysis reaction and produces a solution temperature between about 140.degree. to 160.degree. F;
- c. maintaining said solution temperature of 140.degree. to 160.degree. F. for about 5 to 45 minutes;
- and
- d. rapidly cooling the reaction to about room temperature.
3 more elements
Dependencies are inferred from the claim text.