公开(公告)号：NO870600D0

公开(公告)日：1987-02-16

申请号：NO870600

申请日：1987-02-16

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTHER ,  KOLKMANN FRIEDRICH ,  GRADL REINHARD ,  RESSEL HERBERT

IPC: C01B25/222 ,  C01B25/01 ,  C01B25/22 ,  C01B25/223 ,  C01B25/00

公开(公告)号：NO862574L

公开(公告)日：1986-12-29

申请号：NO862574

申请日：1986-06-25

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTHER ,  GRADL REINHARD ,  KOLKMANN FRIEDRICH

IPC: B01D11/04 ,  C01B25/238 ,  C01B25/46 ,  C01G1/02 ,  C22B3/38 ,  C22B7/00 ,  C01B

Abstract: Residue obtained upon the removal of heavy metal contaminants from crude phosphoric acid by means of a dialkyldithiophosphoric acid ester and adsorbent is worked up into ecologically reliable solid matter and into a heavy metal concentrate. The solid matter and heavy metal concentrate are separated from one another by successive mechanical and chemical treatment. The sequential order of these two operational steps can be inversed.

公开(公告)号：ZA861099B

公开(公告)日：1986-10-29

申请号：ZA861099

申请日：1986-02-14

Applicant: HOECHST AG

Inventor： KOLKMANN FRIEDRICH ,  RESSEL HERBERT ,  GRADL REINHARD ,  SCHIMMEL GUENTHER

IPC: C01B25/22 ,  C01B25/225 ,  C01B25/226 ,  C01B

Abstract: Wet-process phosphoric acid is made by subjecting a phosphate ore to processing treatment with a mineral acid resulting in the formation of a processed suspension. The formation of silicofluorides is obviated by adding, either to the phosphate ore or the processed suspension, a quantity of an aluminum compound soluble in phosphoric acid sufficent for the processed suspension to present an aluminum concentration of 0.3 to 1.0 wgt %, based on P2O5.

公开(公告)号：NO862574D0

公开(公告)日：1986-06-25

申请号：NO862574

申请日：1986-06-25

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTHER ,  GRADL REINHARD ,  KOLKMANN FRIEDRICH

IPC: B01D11/04 ,  C01B25/238 ,  C01B25/46 ,  C01G1/02 ,  C22B3/38 ,  C22B7/00 ,  C01B

Abstract: Residue obtained upon the removal of heavy metal contaminants from crude phosphoric acid by means of a dialkyldithiophosphoric acid ester and adsorbent is worked up into ecologically reliable solid matter and into a heavy metal concentrate. The solid matter and heavy metal concentrate are separated from one another by successive mechanical and chemical treatment. The sequential order of these two operational steps can be inversed.