公开(公告)号：US20200165133A1

公开(公告)日：2020-05-28

申请号：US16637254

申请日：2018-08-10

Applicant: PRAYON TECHNOLOGIES

Inventor： Alexandre Wavreille ,  Livio Lederer ,  Léon Ninane

IPC: C01B25/32

Abstract: Process of acid attack with sulphuric acid of a phosphate source comprising calcium or not comprising calcium for a predetermined time period ranging from 20 to 180 minutes in the conditions wherein the molar ratio of sulphate from the sulphuric acid and possibly from the phosphate source to the calcium present in the phosphate source ranges from 0.6 to 0.8, and the content in P2O5 in the attack tank is of less than 6%.

公开(公告)号：US11407640B2

公开(公告)日：2022-08-09

申请号：US16637254

申请日：2018-08-10

Applicant: PRAYON TECHNOLOGIES ,  Raphael Etienne Lederer ,  Robert Edouard Lederer

Inventor： Alexandre Wavreille ,  Livio Lederer ,  Léon Ninane

IPC: C01B25/32

Abstract: Process of acid attack with sulphuric acid of a phosphate source comprising calcium or not comprising calcium for a predetermined time period ranging from 20 to 180 minutes in the conditions wherein the molar ratio of sulphate from the sulphuric acid and possibly from the phosphate source to the calcium present in the phosphate source ranges from 0.6 to 0.8, and the content in P2O5 in the attack tank is of less than 6%.