公开(公告)号：AU636075B2

公开(公告)日：1993-04-08

申请号：AU1132992

申请日：1992-02-28

Applicant: DEGUSSA AKTIENGESELLSCHAFT

Inventor： DIETER BINDER ,  PETER KLEINSCHMIT ,  HANS HOFFMEISTER ,  ROLAND REUTER

IPC: C01G25/02 ,  C04B35/486

Abstract: The invention relates to monoclinic zirconium oxide having an SiO2 content of less than 1% by weight, which is characterised by dendrite-shaped particles having a mean grain size (d50 value) in the range from 0.5 mu m to 3.0 mu m and a specific surface area (BET) in the range from 3 to 15 m /g. The zirconium oxide is prepared by thermal cracking of zirconium silicate in a high-frequency or medium-frequency inductive fusion furnace with a sinter crust crucible, quenching of the melt by blowing air onto a melt jet and/or spraying the latter with water and leaching the thermally cracked zirconium silicate with concentrated alkali metal hydroxide solution at 100 to 200 DEG C. The zirconium oxides according to the invention is distinguished from prior zirconium oxide by its improved suitability for the production of zirconium silicate colouring materials of the host lattice and inclusion types - pigments of higher colour intensity are obtained.

公开(公告)号：ZA8803833B

公开(公告)日：1988-12-13

申请号：ZA8803833

申请日：1988-05-27

Applicant: DEGUSSA AKTIENGESELLSCHAFT

Inventor： MICHAEL WITZEL ,  PETER KLEINSCHMIT ,  WOLF-DIETER PFEIFER ,  CARL VOIGT ,  PETER ALBERS

IPC: B01J23/40 ,  C01C3/02 ,  C01C ,  B01J

CPC classification number: B01J23/40 ,  C01C3/0229

公开(公告)号：ZA9201534B

公开(公告)日：1992-11-25

申请号：ZA9201534

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER ,  DIETER BINDER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  HOFFMEISTER HANS ,  HANS HOFFMEISTER ,  REUTER ROLAND ,  ROLAND REUTER

IPC: C01G25/02 ,  C04B35/486 ,  C01G ,  C04B ,  C09C

CPC classification number: C04B35/486 ,  C01G25/02 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/80

公开(公告)号：ZA9201532B

公开(公告)日：1992-11-25

申请号：ZA9201532

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER ,  DIETER BINDER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  BIRTIGH GERHARD ,  GERHARD BIRTIGH ,  ZETZMANN KLAUS ,  KLAUS ZETZMANN

IPC: C04B35/653 ,  F27D3/14 ,  F27D25/00 ,  H05B6/24 ,  C04B ,  H05B

CPC classification number: F27D25/001 ,  C04B35/653 ,  F27D3/145 ,  H05B6/24

公开(公告)号：ZA921533B

公开(公告)日：1992-11-25

申请号：ZA921533

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER ,  DIETER BINDER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  ZETZMANN KLAUS ,  KLAUS ZETZMANN ,  HOFFMEISTER HANS ,  HANS HOFFMEISTER

IPC: C01B33/20 ,  C01G25/02 ,  F27D3/14 ,  C01B ,  C01G ,  C09C

公开(公告)号：FR2668762A1

公开(公告)日：1992-05-07

申请号：FR9113628

申请日：1991-11-05

Applicant: DEGUSSA

Inventor： WERNER HARTMANN ,  MARTIN KADNER ,  RUDOLF SCHWARZ ,  PETER KLEINSCHMIT ,  EGBERT BRANDAU ,  HANS HUSCHKA

IPC: B01J2/08 ,  B01J21/04 ,  B01J35/08 ,  C01B13/34 ,  C01F7/02

公开(公告)号：ZA9100899B

公开(公告)日：1991-11-27

申请号：ZA9100899

申请日：1991-02-06

Applicant: DEGUSSA

Inventor： BRAND REINHOLD ,  REINHOLD BRAND ,  FOERSTER MARTIN ,  MARTIN FOERSTER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  OHMER JOHANNES ,  JOHANNES OHMER ,  ENGLER BERND ,  BERND ENGLER ,  HARTMANN WERNER ,  WERNER HARTMANN ,  KOBERSTEIN EDGAR ,  EDGAR KOBERSTEIN ,  SCHWARZ RUDOLF ,  RUDOLF SCHWARZ

IPC: B01J21/06 ,  B01J35/10 ,  B01J37/00 ,  B28B3/20 ,  C04B35/46 ,  C01G ,  B01J ,  C04B

CPC classification number: B01J21/063 ,  B01J35/1014 ,  B01J35/1038 ,  B01J35/1052 ,  B01J35/1061 ,  B01J37/0009 ,  C04B35/46

公开(公告)号：ZA883833B

公开(公告)日：1988-12-13

申请号：ZA883833

申请日：1988-05-27

Applicant: DEGUSSA AKTIENGESELLSCHAFT

Inventor： MICHAEL WITZEL ,  PETER KLEINSCHMIT ,  WOLF-DIETER PFEIFER ,  CARL VOIGT ,  PETER ALBERS

IPC: B01J23/40 ,  C01C3/02 ,  C01C ,  B01J

Abstract: A specific form of surface coating of Al2O3 catalysts, using additional amounts of aluminium ions and minimum amounts of platinum ions, made it possible to use Al2O3 as a catalyst for long-term operation (150 days and more) in the preparation of hydrogen cyanide from hydrocarbons and ammonia, preferably in the BMA process.

公开(公告)号：ZA921534B

公开(公告)日：1992-11-25

申请号：ZA921534

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER ,  DIETER BINDER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  HOFFMEISTER HANS ,  HANS HOFFMEISTER ,  REUTER ROLAND ,  ROLAND REUTER

IPC: C01G25/02 ,  C04B35/486 ,  C01G ,  C09C ,  C04B

Abstract: The invention relates to monoclinic zirconium oxide having an SiO2 content of less than 1% by weight, which is characterised by dendrite-shaped particles having a mean grain size (d50 value) in the range from 0.5 mu m to 3.0 mu m and a specific surface area (BET) in the range from 3 to 15 m /g. The zirconium oxide is prepared by thermal cracking of zirconium silicate in a high-frequency or medium-frequency inductive fusion furnace with a sinter crust crucible, quenching of the melt by blowing air onto a melt jet and/or spraying the latter with water and leaching the thermally cracked zirconium silicate with concentrated alkali metal hydroxide solution at 100 to 200 DEG C. The zirconium oxides according to the invention is distinguished from prior zirconium oxide by its improved suitability for the production of zirconium silicate colouring materials of the host lattice and inclusion types - pigments of higher colour intensity are obtained.

公开(公告)号：ZA921532B

公开(公告)日：1992-11-25

申请号：ZA921532

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER ,  DIETER BINDER ,  KLEINSCHMIT PETER ,  PETER KLEINSCHMIT ,  BIRTIGH GERHARD ,  GERHARD BIRTIGH ,  ZETZMANN KLAUS ,  KLAUS ZETZMANN

IPC: B22D41/46 ,  C04B35/653 ,  C21B7/14 ,  F27B14/06 ,  F27D3/14 ,  F27D3/15 ,  F27D25/00 ,  H05B6/24 ,  C04B ,  H05B

Abstract: A method is disclosed for the semi-continuous melting of ceramic material by means of inductive melting in high-frequency and medium-frequency induction melting furnaces whose melting coil surrounds a sintering crust crucible and contains a run-out channel. In tile method, melt is periodically run out and material to be melted is supplied to the crucible so as to replace the material removed preferably so as to maintain a constant level. An intensively cooled channel is used as a run-out device. For the melt broaching, the melt nose is grasped from below by way of an automatically controllable broaching lance of a broaching device and raised. The broaching lance is then advanced between the bottom of the channel and the solidified melt until the sintering crust is pierced. The method permits a reliable and economic management of the process and the maintenance of the quality of the melted products. A device for periodic melt broaching as well as an induction melting furnace equipped with an intensively coolable run-out channel provides apparatus for carrying out the above method.