公开(公告)号：DE3262541D1

公开(公告)日：1985-04-18

申请号：DE3262541

申请日：1982-06-25

Applicant: DEGUSSA

Inventor： KNORRE HELMUT DR DIPL CHEM ,  FISCHER JOACHIM ,  STUTZEL KLAUS

IPC: C02F1/72 ,  G01N33/18 ,  G05D21/02

Abstract: There is provided a continuous process for the lowering of the content of toxic materials in waste waters which also contain other oxidizable materials by quickly and continuously ascertaining the requirement of hydrogen peroxide, namely by potentiometric determination of the oxidizing agent requirement in a branched-off side-stream using a strong oxidizing agent, such as peroxymonosulfate, peroxydisulfate, permanganate, hypochlorite or ozone, which acts more quickly than hydrogen peroxide under comparable conditions.

公开(公告)号：MX155749A

公开(公告)日：1988-04-25

申请号：MX786982

申请日：1982-06-28

Applicant: DEGUSSA

Inventor： KNORRE HELMUT ,  FISCHER JOACHIM ,  STUTZEL KLAUS

IPC: C02F1/72

公开(公告)号：AU649557B2

公开(公告)日：1994-05-26

申请号：AU2121792

申请日：1992-08-21

Applicant: DEGUSSA

Inventor： FISCHER JOACHIM ,  WOLF HUBERT ,  STUTZEL KLAUS ,  BRANDNER FRIEDHELM ,  DIEHL MANFRED

IPC: C02F1/72 ,  C23F1/16 ,  C23G1/02 ,  G01N27/32 ,  G01N27/416

Abstract: The lowering of the nitrite content of aqueous solutions by treatment using hydrogen peroxide in the acidic pH region can be controlled by measuring the redox potential. In contrast to the teaching of the prior art, in the process according to the invention, the addition of the hydrogen peroxide is not terminated in the region of the highest redox potential but only after lowering the potential to a value of 650+/-10 mV. In this manner, nitrite contents below 1 mg/l can be obtained even when the solutions additionally contain varying amounts of various constituents which can be oxidised by H2O2.

公开(公告)号：AU549345B2

公开(公告)日：1986-01-23

申请号：AU8543782

申请日：1982-06-29

Applicant: DEGUSSA

Inventor： KNORRE HELMUT ,  FISCHER JOACHIM ,  STUTZEL KLAUS

IPC: C02F1/72 ,  G01N33/18 ,  G05D21/02 ,  C02F1/76 ,  C02F1/78

Abstract: There is provided a continuous process for the lowering of the content of toxic materials in waste waters which also contain other oxidizable materials by quickly and continuously ascertaining the requirement of hydrogen peroxide, namely by potentiometric determination of the oxidizing agent requirement in a branched-off side-stream using a strong oxidizing agent, such as peroxymonosulfate, peroxydisulfate, permanganate, hypochlorite or ozone, which acts more quickly than hydrogen peroxide under comparable conditions.

公开(公告)号：BR8203722A

公开(公告)日：1983-06-21

申请号：BR8203722

申请日：1982-06-25

Applicant: DEGUSSA

Inventor： KNORRE HELMUT ,  FISCHER JOACHIM ,  STUTZEL KLAUS

IPC: C02F1/72 ,  G01N33/18 ,  G05D21/02 ,  C02B1/72

Abstract: There is provided a continuous process for the lowering of the content of toxic materials in waste waters which also contain other oxidizable materials by quickly and continuously ascertaining the requirement of hydrogen peroxide, namely by potentiometric determination of the oxidizing agent requirement in a branched-off side-stream using a strong oxidizing agent, such as peroxymonosulfate, peroxydisulfate, permanganate, hypochlorite or ozone, which acts more quickly than hydrogen peroxide under comparable conditions.