The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2006
Filed:
Jun. 09, 2003
Michael Massoud Hajjatie, Tucson, AZ (US);
Harry Charles Kominski, Iii, Phoenix, AZ (US);
Mark Daniel Aspengren, Chandler, AZ (US);
Mark Pierce Clarkson, Phoenix, AZ (US);
Constance Lynn Frank Lockhart, Tucson, AZ (US);
Michael Massoud Hajjatie, Tucson, AZ (US);
Harry Charles Kominski, III, Phoenix, AZ (US);
Mark Daniel Aspengren, Chandler, AZ (US);
Mark Pierce Clarkson, Phoenix, AZ (US);
Constance Lynn Frank Lockhart, Tucson, AZ (US);
Tessenderlo Kerley, Inc., Phoenix, AZ (US);
Abstract
An efficient process to produce calcium thiosulfate (CaSO) from lime, sulfur and oxygen is described. By selecting appropriate process conditions such as mole ratios of lime to sulfur, temperature and pressure of the reaction process and the oxidation conditions, including rate and duration, the concentration of byproducts in the resulting suspension can be reduced to about 2% by weight or less. The solid particulate dispersion in the suspension tends to form a slimy solid suspension that is hard to filter if not treated properly. The suspension then can be acidified and treated with a flocculent. This agglomerates the solids into a floc that filters with ease. The resulting calcium thiosulfate is a clear liquid with concentrations achievable up to 29%.