公开(公告)号：GR3001752T3

公开(公告)日：1992-11-23

申请号：GR900400706

申请日：1991-04-11

Applicant: DEGUSSA

Inventor： DOERR JUERGEN DR ,  KLEINSCHMIT PETER DR ,  KLINGEL REINHARD DR ,  MANNER REINHARD DR

IPC: C04B28/26 ,  B01D53/02 ,  B01D53/28 ,  B01J20/18 ,  B01J20/28 ,  B01J37/00 ,  C01B39/00 ,  C01B39/14 ,  C01B39/20 ,  C09K5/00 ,  C09K5/08

公开(公告)号：BR9200699A

公开(公告)日：1992-11-10

申请号：BR9200699

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER DR ,  KLEINSCHMIT PETER DR

IPC: B22D41/46 ,  C04B35/653 ,  C21B7/14 ,  F27B14/06 ,  F27D3/14 ,  F27D3/15 ,  F27D25/00 ,  H05B6/24 ,  C04B35/64

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.

公开(公告)号：BR9200697A

公开(公告)日：1992-11-10

申请号：BR9200697

申请日：1992-02-28

Applicant: DEGUSSA

Inventor： BINDER DIETER DR ,  KLEINSCHMIT PETER DR

IPC: C01G25/02 ,  C04B35/486 ,  C09C1/28 ,  C04B35/48

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：AT74573T

公开(公告)日：1992-04-15

申请号：AT88120131

申请日：1988-12-02

Applicant: DEGUSSA

Inventor： LIU ANH THU DR ,  SCHWARZ RUDOLF DR ,  KLEINSCHMIT PETER DR

IPC: B01J21/06 ,  B01J35/10 ,  B01J37/00 ,  C01B21/06 ,  C01F7/00 ,  C01F7/02 ,  C01F7/34 ,  C01G25/00

公开(公告)号：AT73423T

公开(公告)日：1992-03-15

申请号：AT89120839

申请日：1989-11-10

Applicant: DEGUSSA

Inventor： PAULI INGO DR ,  KLEINSCHMIT PETER DR ,  SCHWARZ RUDOLF DR

IPC: C01B33/18

公开(公告)号：AT73111T

公开(公告)日：1992-03-15

申请号：AT88108299

申请日：1988-05-25

Applicant: DEGUSSA

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

IPC: B01J23/40 ,  C01C3/02

公开(公告)号：CS9004522A3

公开(公告)日：1992-01-15

申请号：CS452290

申请日：1990-09-17

Applicant: DEGUSSA

Inventor： KISS AKOS DR ,  SPEER DIETRICH DR ,  KLEINSCHMIT PETER DR ,  HORST JENNY

IPC: C09C1/56 ,  C09C1/00 ,  C09C1/48

CPC classification number: C09C1/0012 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/60

公开(公告)号：BR9101853A

公开(公告)日：1991-12-17

申请号：BR9101853

申请日：1991-05-08

Applicant: DEGUSSA

Inventor： SPEER DIETRICH DR ,  KISS AKOS DR ,  KLEINSCHMIT PETER DR

IPC: C09C1/36 ,  C09C1/00 ,  C09C1/22 ,  C09C1/34 ,  C09C1/40 ,  C09C3/06 ,  C04B33/14

公开(公告)号：CS274564B2

公开(公告)日：1991-08-13

申请号：CS619787

申请日：1987-08-24

Applicant: DEGUSSA

Inventor： DESCHLER ULRICH DR ,  HELLWIG GEORG DR ,  MICHEL RUDOLF ,  KLEINSCHMIT PETER DR ,  WOLFF SIEGFRIED

IPC: C07D251/52 ,  C08K5/34 ,  C08K5/37 ,  C08K5/378 ,  C08L21/00

Abstract: Mixtures of sulfurous triazine compounds and methods of preparing these compounds with the general formula I in which R1, R2=H,R2=benzyl, R2, R3, R4=C1-C8-alkyl, allyl, C3-C8 cycloalkyl, the latter unsubstituted or substituted with 1-3 methyl groups, 2-hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl or R3 and R4 (together): C4-C6-alkylene, -(CH2-CHX)2 Y with X=H, CH3, Y=O,S, Sa: Polysulfide chain with 2-10 S atoms (i.e. 2 I in which R1, R2, R3, R4 have the meanings indicated above is reacted with an ammonium polysulfide or alkali polysulfide and dissolved in a protic polar solvent, especially water, at a temperature of 80 DEG to 140 DEG C.

公开(公告)号：AT58892T

公开(公告)日：1990-12-15

申请号：AT86107159

申请日：1986-05-27

Applicant: DEGUSSA

Inventor： PANSTER PETER DR ,  MUELLER RUDOLF ,  KLEINSCHMIT PETER DR

IPC: C01G23/00 ,  H01M4/00 ,  H01M4/58