公开(公告)号：WO2022098241A1

公开(公告)日：2022-05-12

申请号：PCT/NL2021/050686

申请日：2021-11-09

Applicant: SUSPHOS B.V.

Inventor： SCHIPPER, Willem Johan ,  AJAO, Victor Olusola

IPC: C01B25/22 ,  C01B25/222 ,  C01B25/28 ,  C05B11/04

Abstract: The invention relates to a process for the production of phosphoric acid, phosphoric acid obtainable by the process, the production of ammonium phosphate salts, and to the use of ammonium salts. A process for the production of phosphoric acid, comprising: i) reacting a phosphorus-containing material with an acid, without organic solvent, thereby forming a reaction mixture comprising phosphoric acid, wherein said acid has a pKa of 3.5 or lower, and ii) extracting phosphoric acid from the reaction mixture by adding organic solvent to the reaction mixture, thereby forming a phosphoric acid solution, wherein 20 wt.% or less of free water is added to the reaction mixture, based on the total weight of the reaction mixture, and the phosphorus-containing material comprises secondary raw material comprising phosphate.