公开(公告)号：JPS63161133A

公开(公告)日：1988-07-04

申请号：JP30880487

申请日：1987-12-08

Applicant: DEGUSSA

Inventor： WAGNER RUDOLF ,  SCHIWIORA HARRY ,  STUEMKE MANFRED ,  GROLL WERNER

IPC: A61K6/04 ,  C22C5/04

Abstract: Palladium alloys consisting of (a) 65 to 85% palladium, (b) 0 to 10% gold and/or 0 to 5% platinum, (c) 0.1 to 10% tin, (d) 1 to 10% gallium, (e) 1 to 12% copper, (f) 0.05 to 1.5% ruthenium and/or 0.05 to 0.7% rhenium as well as (g) 0.01 to 4% tungsten and/or 0.01 to 4% aluminum and/or 0.01 to 4% zinc are use to produce firmly seated and removable dentures. These alloys do not form oxide films when melted in air.

公开(公告)号：CA2389428C

公开(公告)日：2009-02-10

申请号：CA2389428

申请日：2000-10-26

Applicant: DEGUSSA

Inventor： HAAS THOMAS ,  CREUTZ MATTHIAS ,  WAGNER RUDOLF ,  SAUER JORG ,  GLENNEBERG JURGEN ,  VANHEERTUM RUDOLF

IPC: C01B15/023 ,  B01J8/02 ,  B01J10/00 ,  B01J23/44 ,  B01J35/02

Abstract: The hydrogenation step in the anthrachinone process for producing hydrogen peroxide in a hydrogenation reactor performed on a solid bed catalyst from particle-shaped catalyst is known in prior art. According to the invention, the residence time of a catalyst is increased by transporting working solution containing reaction support material and transporting a hydrogen-containing gas phase as a mixture from the downside to the upside through a hydrogenati on reactor. The empty pipe velocity of the working solution is 0.05 to 100 m/h, in particular 10 to 50 m/h.

公开(公告)号：PL361835A1

公开(公告)日：2004-10-04

申请号：PL36183501

申请日：2001-10-24

Applicant: DEGUSSA

Inventor： NORDHOFF STEFAN ,  CREUTZ MATTHIAS ,  GROSS STEFAN ,  WAGNER RUDOLF

IPC: B01D9/02 ,  C01B15/013

Abstract: A process for the continuous preparation of very highly concentrated hydrogen peroxide having a content of greater than 80 wt.%, especially over 98 wt.%, by suspension crystallization and after-treatment of the H2O2 crystals. The after-treatment takes the form of countercurrent washing in a hydraulic or mechanical washing column with a packed crystal bed. Hydrogen peroxide is disclosed having a concentration of from 99.9 to 100 wt.% and a content of TOC, nitrate, phosphate, nickel and tin of in each case less than 4 mg/l.

公开(公告)号：CA2436892A1

公开(公告)日：2002-06-06

申请号：CA2436892

申请日：2001-10-24

Applicant: DEGUSSA

Inventor： WAGNER RUDOLF ,  GROSS STEFAN ,  CREUTZ MATTHIAS ,  NORDHOFF STEFAN

IPC: B01D9/02 ,  C01B15/013

Abstract: The invention relates to a process for the continuous preparation of very highly concentrated hydrogen peroxide having a content of greater than 80 wt.%, especially over 98 wt.%, by suspension crystallisation and after- treatment of the H2O2 crystals. According to the invention, the after- treatment takes the form of countercurrent washing in a hydraulic or mechanical washing column with a packed crystal bed. The invention also provides hydrogen peroxide having a concentration of from 99.9 to 100 wt.% a nd a content of TOC, nitrate, phosphate, nickel and tin of in each case less th an 4 mg/l.

公开(公告)号：CA2427710A1

公开(公告)日：2002-05-10

申请号：CA2427710

申请日：2001-10-04

Applicant: DEGUSSA

Inventor： CREUTZ MATTHIAS ,  GLENNEBERG JURGEN ,  WAGNER RUDOLF ,  NORDHOFF STEFAN ,  MOLLER ROLF-DIETER

IPC: B01D9/02 ,  C01B15/013

Abstract: The invention is directed towards a process for the concentration of aqueous hydrogen peroxide, comprising discontinuous crystallisation. According to the invention, a cooling surface arranged in a crystallising vessel and first wetted with hydrogen peroxide is cooled at a high cooling rate, whereupon seed crystals form. The cooling rate is at least 1 K/s, preferably from 10 to 30 K/s. When the vessel has been filled with H2O2 starting material, the latter crystallises, starting from the seed crystals, and forms a crystal layer. When the mother liquor of lower H2O2 concentration has been discharged, there follows a sweating operation with a slow increase in temperature, as a result of which the H2O2 concentration in the crystal layer is increased further.

公开(公告)号：DE19953185A1

公开(公告)日：2001-05-23

申请号：DE19953185

申请日：1999-11-05

Applicant: DEGUSSA

Inventor： HAAS THOMAS ,  GLENNEBERG JUERGEN ,  WAGNER RUDOLF ,  CREUTZ MATTHIAS ,  SAUER JOERG ,  VANHEERTUM RUDOLF

IPC: B01J8/02 ,  B01J10/00 ,  B01J23/44 ,  B01J35/02 ,  C01B15/023

Abstract: The hydrogenation step in the anthrachinone process for producing hydrogen peroxide in a hydrogenation reactor performed on a solid bed catalyst from particle-shaped catalyst is known in prior art. According to the invention, the residence time of a catalyst is increased by transporting working solution containing reaction support material and transporting a hydrogen-containing gas phase as a mixture from the downside to the upside through a hydrogenation reactor. The empty pipe velocity of the working solution is 0.05 to 100 m/h, in particular 10 to 50 m/h.

公开(公告)号：AU1387501A

公开(公告)日：2001-05-14

申请号：AU1387501

申请日：2000-10-26

Applicant: DEGUSSA

Inventor： HAAS THOMAS ,  GLENNEBERG JURGEN ,  WAGNER RUDOLF ,  CREUTZ MATTHIAS ,  SAUER JORG ,  VANHEERTUM RUDOLF

IPC: B01J8/02 ,  B01J10/00 ,  B01J23/44 ,  B01J35/02 ,  C01B15/023

Abstract: In carrying out the hydrogenation stage of the anthraquinone process for the preparation of hydrogen peroxide in a hydrogenation reactor on a fixed bed catalyst of a particulate catalyst, the service life of the catalyst is increased in that the working solution comprising the reaction carrier and a gas phase comprising hydrogen, are passed through the hydrogenation reactor from the bottom upwards. The empty tube speed of the working solution is 0.05 to 100 m/h, preferably 10 to 50 m/h.

公开(公告)号：CA2389428A1

公开(公告)日：2001-05-10

申请号：CA2389428

申请日：2000-10-26

Applicant: DEGUSSA

Inventor： GLENNEBERG JURGEN ,  CREUTZ MATTHIAS ,  HAAS THOMAS ,  SAUER JORG ,  VANHEERTUM RUDOLF ,  WAGNER RUDOLF

IPC: B01J8/02 ,  B01J10/00 ,  B01J23/44 ,  B01J35/02 ,  C01B15/023

Abstract: The hydrogenation step in the anthrachinone process for producing hydrogen peroxide in a hydrogenation reactor performed on a solid bed catalyst from particle-shaped catalyst is known in prior art. According to the invention, the residence time of a catalyst is increased by transporting working soluti on containing reaction support material and transporting a hydrogen-containing gas phase as a mixture from the downside to the upside through a hydrogenati on reactor. The empty pipe velocity of the working solution is 0.05 to 100 m/h, in particular 10 to 50 m/h.

公开(公告)号：ES2020543B3

公开(公告)日：1991-08-16

申请号：ES87116065

申请日：1987-10-31

Applicant: DEGUSSA

Inventor： WAGNER RUDOLF ,  STUMKE MANFRED ,  GROLL WERNER ,  SCHIWIORA HARRY

IPC: A61K6/04 ,  C22C5/04

公开(公告)号：AU8220287A

公开(公告)日：1988-06-16

申请号：AU8220287

申请日：1987-12-08

Applicant: DEGUSSA

Inventor： WAGNER RUDOLF ,  SCHIWIORA HARRY ,  STUMKE MANFRED ,  GROLL WERNER

IPC: A61K6/04 ,  C22C5/04

Abstract: Palladium alloys consisting of (a) 65 to 85% palladium, (b) 0 to 10% gold and/or 0 to 5% platinum, (c) 0.1 to 10% tin, (d) 1 to 10% gallium, (e) 1 to 12% copper, (f) 0.05 to 1.5% ruthenium and/or 0.05 to 0.7% rhenium as well as (g) 0.01 to 4% tungsten and/or 0.01 to 4% aluminum and/or 0.01 to 4% zinc are use to produce firmly seated and removable dentures. These alloys do not form oxide films when melted in air.