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)

x

Related articles:

Issue 2021-8 US 2021/0269321 A1

Systems and methods to recover value-added materials from gypsum

(22) 15.05.2021 (43) 02.09.2021 (57) Disclosed herein are systems and methods from processing flue gas desulfurization (FGD) gypsum feedstock and ash feedstocks, either separately or together. FGD...

more
Issue 2015-7-8 WO?2015/085129?A1

Gypsum composites containing ­cementitious materials and methods

(22) 05.12.2014 (43) 11.06.2015 (57) Gypsum composites containing cementitious materials and methods of making the same are provided. Gypsum composites include gypsum and a cementitious material....

more
Issue 2018-10 GB 2557605 A

Method of producing high purity gypsum

(22) 09.12.2016 (43) 27.06.2018 (57) Releasing impurities from a calcium-based mineral to produce pure double salt crystals for producing high quality gypsum and chalk – A method for releasing...

more
Issue 2022-3 WO 2022/036923 A1

Technological process for changing physical and chemical properties of new phosphogypsum by using calcium hydroxide

(22) 02.12.2020 (43) 24.02.2022 (57) A technological process for changing physical and chemical properties of new phosphogypsum by using calcium hydroxide, relating to the technical field of new...

more
Issue 2020-5-6 US 2020/0078980 A1

Gypsum panels, systems, and methods

(22) 25.10.2017 (43) 12.03.2020 (57) Gypsum panels and methods of making the same are provided. A method of making a gypsum panel includes forming a first gypsum slurry by combining stucco, water, a...

more