EP 3694621 A1 20200819 - IMPROVED METHOD FOR THE CARBON-DIOXIDE EXTRACTION OF PHOSPHATES FROM RAW MATERIALS
Title (en)
IMPROVED METHOD FOR THE CARBON-DIOXIDE EXTRACTION OF PHOSPHATES FROM RAW MATERIALS
Title (de)
VERBESSERTES VERFAHREN ZUR KOHLENSTOFFDIOXID-EXTRAKTION VON PHOSPHATEN AUS ROHSTOFFEN
Title (fr)
PROCÉDÉ AMÉLIORÉ D'EXTRACTION, PAR DIOXYDE DE CARBONE, DE PHOSPHATES CONTENUS DANS DES MATIÈRES PREMIÈRES
Publication
Application
Priority
- DE 102017123807 A 20171012
- EP 2018077420 W 20181009
Abstract (en)
[origin: WO2019072814A1] The aim of the invention is to provide an improved method for the carbon-dioxide extraction of phosphates from raw materials, in which higher yields are achieved. This aim is achieved by a according to the invention in which (a) carbon dioxide is introduced into an aqueous, alcoholic or aqueous/alcoholic suspension of the raw material, (b) the carbon dioxide in the suspension is caused to act on the raw material under increased pressure, then (c) undissolved solid materials are separated out from the suspension, a liquid being obtained, and after that (d) phosphates dissolved in the liquid obtained in step c) are precipitated therefrom and separated from the liquid. The method is characterized in particular in that stages (a) and (b) are carried out in a continuously operating reactor until the pH of the suspension is ≤6.9. The invention further relates to a processing system by means of which said method can be carried out.
IPC 8 full level
B01D 11/02 (2006.01); C01B 25/26 (2006.01); C02F 1/26 (2006.01); C02F 9/00 (2006.01); C02F 11/00 (2006.01); C02F 11/12 (2019.01); C05F 3/00 (2006.01); C05F 7/00 (2006.01)
CPC (source: EP)
B01D 11/0203 (2013.01); B01D 11/0226 (2013.01); B01D 11/0265 (2013.01); B01D 11/0284 (2013.01); B01D 11/0292 (2013.01); C01B 25/26 (2013.01); C02F 9/00 (2013.01); C05B 15/00 (2013.01); C05B 17/00 (2013.01); C05F 1/005 (2013.01); C05F 3/00 (2013.01); C05F 7/00 (2013.01); C05F 9/00 (2013.01); C05F 9/04 (2013.01); C02F 1/001 (2013.01); C02F 1/26 (2013.01); C02F 1/38 (2013.01); C02F 1/385 (2013.01); C02F 1/5263 (2013.01); C02F 1/66 (2013.01); C02F 11/00 (2013.01); C02F 2101/105 (2013.01); C02F 2209/06 (2013.01); C02F 2301/046 (2013.01); C02F 2301/066 (2013.01); Y02A 40/20 (2017.12); Y02P 20/141 (2015.11); Y02P 20/145 (2015.11)
Citation (search report)
See references of WO 2019072814A1
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
DOCDB simple family (publication)
WO 2019072814 A1 20190418; DE 102017123807 A1 20190418; EP 3694621 A1 20200819
DOCDB simple family (application)
EP 2018077420 W 20181009; DE 102017123807 A 20171012; EP 18783477 A 20181009