公开(公告)号：DE2357524A1

公开(公告)日：1975-05-28

申请号：DE2357524

申请日：1973-11-17

Applicant: DEGUSSA

Inventor： DITTRICH GUNTHER DR ,  KUEHNER GERHARD DR ,  VOLL MANFRED DR

IPC: C09C1/50 ,  C09C1/54

公开(公告)号：DE2410565A1

公开(公告)日：1975-09-18

申请号：DE2410565

申请日：1974-03-06

Applicant: DEGUSSA

Inventor： ROTHBUEHR LOTHAR DR ,  KUEHNER GERHARD DR ,  DITTRICH GUNTHER DR

IPC: C09C1/50 ,  F23D17/00

公开(公告)号：DE2318652A1

公开(公告)日：1974-11-07

申请号：DE2318652

申请日：1973-04-13

Applicant: DEGUSSA

Inventor： DITTRICH GUNTHER DR ,  KLEINSCHMITT PETER DR ,  MANNSFELD SVEN-PETER DR ,  SCHMIDT FELIX DR ,  WAGNER ADOLF

IPC: A62D3/32 ,  A62D101/26 ,  A62D101/45 ,  C02F9/00 ,  C21D1/46 ,  C23C8/40 ,  A62D3/00

Abstract: Pollution by waste from melts used in hardening, carburising and nitriding steel, and from heat-treatment melts contg. alkali nitrite/nitrate, is prevented by common destruction of (1) cyanides, cyanates and complex cyanides (I)and of (2) nitrates and nitrites (II). Powdery mixts contg (I) and (II) are reacted with one another, in molten or sinter sintered conditions, using a wt. ratio (II):(I)>2.1(>4), and reducing excess (II) by reaction with C or C-contg. substances in molten phase. Mixts of powdered salts are heated at least to formation of melt, partic. when C is added after reaction of (I) and (II), or powdered salts contg. (I) or (II) may be introduced into stirred melt of the other cpd gp. Reduction with C may be effected also during reaction of salt mixts. esp. at 50 degrees C above their melting temp.

公开(公告)号：DE2305491A1

公开(公告)日：1974-08-29

申请号：DE2305491

申请日：1973-02-05

Applicant: DEGUSSA

Inventor： DITTRICH GUNTHER DR ,  JAEGER GERHARD DR ,  KUEHNER GERHARD DR ,  MEYER-SIMON EUGEN DR ,  SAUER HEINRICH DIPL ING

IPC: C09C1/50