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:
Oct. 11, 2011
Filed:
Apr. 21, 2010
Process for preparation of calcium thiosulfate liquid solution from lime, sulfur, and sulfur dioxide
Michael Massoud Hojjatie, Tucson, AZ (US);
Yelena Feinstein, Tucson, AZ (US);
Constance Lynn Frank Lockhart, Tucson, AZ (US);
Michael Massoud Hojjatie, Tucson, AZ (US);
Yelena Feinstein, Tucson, AZ (US);
Constance Lynn Frank Lockhart, Tucson, AZ (US);
Tessenderlo Kerley, Inc., Phoenix, AZ (US);
Abstract
An efficient batch or semi-continuous method of production of relative high concentration, low byproduct-containing, calcium thiosulfate (CaSO) from lime, sulfur or calcium polysulfide, and sulfur dioxide under elevated reaction temperature conditions is described. The product is an emulsion of liquid calcium thiosulfate and solid byproducts. Under the conditions of the art, including the mole ratios of lime to sulfur, the temperature of the reaction process and the sulfur dioxide reaction conditions, including rate and duration, the byproducts are reduced to about 2% by weight.