EP 4188880 A1 20230607 - METHOD FOR MANUFACTURING AMMONIUM SULPHATE AND CALCIUM CARBONATE FROM PHOSPHOGYPSUM
Title (en)
METHOD FOR MANUFACTURING AMMONIUM SULPHATE AND CALCIUM CARBONATE FROM PHOSPHOGYPSUM
Title (de)
VERFAHREN ZUR HERSTELLUNG VON AMMONIUMSULFAT UND CALCIUMCARBONAT AUS PHOSPHORGIPS
Title (fr)
PROCÉDÉ DE FABRICATION DE SULFATE D'AMMONIUM ET DE CARBONATE DE CALCIUM A PARTIR DE PHOSPHOGYPSE
Publication
Application
Priority
- FR 2008203 A 20200731
- MA 2021000016 W 20210728
Abstract (en)
[origin: WO2022025742A1] The invention relates to a method for manufacturing ammonium sulphate and calcium carbonate from phosphogypsum, characterised in that it comprises the following steps: - dispersing phosphogypsum in water to form a phosphogypsum liquid suspension, - sparging gaseous carbon dioxide and gaseous ammonia in the phosphogypsum liquid suspension to precipitate calcium carbonate, - filtering the phosphogypsum liquid suspension to produce a filtrate comprising ammonium sulphate, and a solid residue comprising the calcium carbonate precipitate, - evaporating the filtrate to produce ammonium sulphate and drying the solid residue to produce calcium carbonate.
IPC 8 full level
C01F 11/18 (2006.01); B09B 5/00 (2006.01); C01C 1/24 (2006.01)
CPC (source: EP US)
B01J 8/085 (2013.01 - US); C01C 1/24 (2013.01 - EP); C01C 1/244 (2013.01 - US); C01F 11/18 (2013.01 - EP); C01F 11/181 (2013.01 - US); B01J 2208/00849 (2013.01 - US); B01J 2208/00911 (2013.01 - US); B09B 3/70 (2022.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022025742 A1 20220203; AU 2021315328 A1 20230309; BR 112023001697 A2 20230502; CA 3187515 A1 20220203; CN 118139819 A 20240604; EP 4188880 A1 20230607; FR 3113050 A1 20220204; FR 3113050 B1 20230421; US 2023303400 A1 20230928
DOCDB simple family (application)
MA 2021000016 W 20210728; AU 2021315328 A 20210728; BR 112023001697 A 20210728; CA 3187515 A 20210728; CN 202180062316 A 20210728; EP 21765728 A 20210728; FR 2008203 A 20200731; US 202118018702 A 20210728