US 2017/0022070 A1

System and methods for ­removing ­impurities from phosphogypsum and manufacturing gypsum binders and products

(22) 02.04.2015

(43) 26.01.2017

(57) Methods and systems that remove impurities from phosphogypsum (PG), including from radium and heavy metal salts, and produce gypsum binders and products. In one embodiment, PG is reacted with a chloride solution in an acidic environment under mechanical manipulation and/or heat followed by galvanic and/or zeolite absorption removal of impurities.

(71) Technion Research & Development Foundation Ltd., Haifa (IL); Vanderbilt University, Nashville, TN (US)

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