Process for preparation of calcium thiosulfate liquid solution from lime, sulfur, and sulfur dioxide

Australia Patent

PATENT NO 2011201818
APP PUB NO AU-2011201818-A1
SERIAL NO

2011201818

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Abstract Process for Preparation of Calcium Thiosulfate Liquid Solution from Lime, Sulfur, and Sulfur dioxide s An efficient batch or semi-continuous method of production of relative high concentration, low byproduct-containing, calcium thiosulfate (CaS2O3) 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 io temperature of the reaction process and the sulfur dioxide reaction conditions, including rate and duration, the byproducts are reduced to about 2% by weight.

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