公开(公告)号：CA1195824A

公开(公告)日：1985-10-29

申请号：CA418811

申请日：1982-12-31

Applicant: HOECHST AG

Inventor： GRADL REINHARD ,  SCHIMMEL GUENTHER ,  KRAUSE WERNER ,  HEYMER GERO

IPC: C01B25/238 ,  B01D11/04 ,  C01B25/237 ,  C01B25/46 ,  C01G1/00 ,  C22B3/00

Abstract: PROCESS FOR REMOVING HEAVY METAL IONS FROM WET-PROCESSED PHOSPHORIC ACID The disclosure relates to process for removing heavy metal ions, especially cadmium, copper, lead and mercury ions from wet-processed phosphoric acid. To this end, the crude acid is contacted with a mixture consisting of an adsorbent and a diorganyldithiophosphoric acid ester or, after treatment with the ester, the acid is contacted with the adsorbent alone, and the purified phosphoric acid is ultimately separated from the ester and adsorbent.

公开(公告)号：CA1191700A

公开(公告)日：1985-08-13

申请号：CA406297

申请日：1982-06-29

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTER ,  KRAUSE WERNER ,  GRADL REINHARD

IPC: C02F1/26 ,  C01B25/238 ,  C02F1/62 ,  C22B3/00 ,  C22B3/38

Abstract: PROCESS FOR EXTRACTING HEAVY METAL IONS FROM AQUEOUS SOLUTIONS The disclosure relates to a process for liquid/ liquid-extraction of heavy metal ions from acid aqueous solutions with the aid of water-insoluble dithiophosphoric acid diesters as extracting agents. More particularly, use is made of phosphoric acid solutions with a P2O5content of from 3 to 80 weight %, the solutions being free from emulsion-forming organic contaminants or having previously been freed therefrom in known manner. The resulting aqueous phase is separated from the phase containing the dithiophosphoric acid diester.

公开(公告)号：FI68388B

公开(公告)日：1985-05-31

申请号：FI830270

申请日：1983-01-26

Applicant: HOECHST AG

Inventor： GRADL REINHARD ,  SCHIMMEL GUENTHER ,  KRAUSE WERNER ,  HEYMER GERO

IPC: C01B25/238 ,  B01D11/04 ,  C01B25/237 ,  C01B25/46 ,  C01G1/00 ,  C22B3/00

公开(公告)号：DD212965A5

公开(公告)日：1984-08-29

申请号：DD25578283

申请日：1983-10-19

Applicant: HOECHST AG

Inventor： KRAUSE WERNER ,  PIEPER WERNER

IPC: C07F9/38

Abstract: The disclosure provides a novel process for making 1-hydroxyalkane-1-phosphonic acids by reacting an aldehyde with tetraphosphorus hexoxide.

公开(公告)号：DD202509A5

公开(公告)日：1983-09-21

申请号：DD24161982

申请日：1982-07-13

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTHER ,  KRAUSE WERNER ,  GRADL REINHARD

IPC: C02F1/26 ,  C01B25/238 ,  C02F1/62 ,  C22B3/00 ,  C22B3/38 ,  B01D11/04

Abstract: The disclosure relates to a process for liquid/liquid-extraction of heavy metal ions from acid aqueous solutions with the aid of water-insoluble dithiophosphoric acid diesters as extracting agents. More particularly, use is made of phosphoric acid solutions with a P2O5-content of from 3 to 80 weight %, the solutions being free from emulsion-forming organic contaminants or having previously been freed therefrom in known manner. The resulting aqueous phase is separated from the phase containing the dithiophosphoric acid diester.

公开(公告)号：DD157463A5

公开(公告)日：1982-11-10

申请号：DD22845881

申请日：1981-03-19

Applicant: HOECHST AG

Inventor： KRAUSE WERNER ,  GROSSE JUERGEN ,  KLOSE WERNER

IPC: C07F9/165 ,  B01J31/00 ,  B01J31/02 ,  C07B61/00 ,  C07F9/17 ,  C07F9/18

Abstract: The invention relates to a process wherein an alcohol and/or phenol is reacted with phosphorus pentasulfide in the presence of a catalyst which is selected from (a) phosphonium salts of the general formula: I (b) ammonium salts of the general formula: II (c) phosphine oxides of the general formula: III (d) phosphine sulfides of the general formula: IV (e) phosphinic acid derivatives of the general formula: V In formulae I through V, the substituents R1, R2, R3 and R4 each stand for identical or different alkyl-, aryl-, alkaryl- or aralkyl- groups having from 1 to 22 carbon atoms. A stands for an inorganic or organic acid, and X and Y, respectively, stand for both oxygen and sulfur, and M stands for a monovalent metal or oxygen.