公开(公告)号：JPH10310424A

公开(公告)日：1998-11-24

申请号：JP2078098

申请日：1998-02-02

Applicant: DEGUSSA

Inventor： SCHUETTE RUEDIGER DR ,  ALT CHRISTIAN HANS ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED DR ,  HIPPEL LUKAS VON DR ,  FEUER OLIVER ,  LOROESCH JUERGEN DR

IPC: C01C3/08 ,  C01C3/10

Abstract: PROBLEM TO BE SOLVED: To obtain the granule of high-purity alkali (earth) metal cyanide by spraying an aq. soln. or suspension of an alkali (earth) metal hydroxide into a reactor, allowing the soln. or suspension to react with gaseous hydrogen cyanide and vaporizing the water introduced into the reactor and generated. SOLUTION: The reaction consists in the spray granulation in a fluidized bed kept at 100-250 deg.C. Hydrogen cyanide is introduced at 120-400 deg.C along with a fluidization gas (e.g. nitrogen). The molar ratio of the hydrogen cyanide to the alkali (earth) hydroxide equivalent is controlled to 1-5. For example, the BMA- or the reacting gas from the Shawingan's process contg. hydrogen contg. hydrogen cyanide and hydrogen as the main components is used or the reacting gas from the Andrussow's process contg. hydrogen cyanide, N2 , H2 , H2 O and CO as the main components is used. The concn. of the alkali metal metal soln. to be sprayed is controlled to 10-70 wt.%.

公开(公告)号：AP786A

公开(公告)日：1999-11-26

申请号：AP9801197

申请日：1998-02-04

Applicant: DEGUSSA ,  CYPLUS GMBH ,  EVONIK DEGUSSA GMBH

Inventor： SCHUTTE RUDIGER ,  ALT HANS CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED ,  HIPPEL LUKAS VON ,  FEUER OLIVER ,  LOROSCH JURGEN

IPC: C01C3/08 ,  C01C3/10

Abstract: The invention relates to a process for the direct preparation of alkali metal cyanide and alkaline earth metal cyanide granules from an HCN-containing gas and an aqueous solution or suspension of an alkali metal or alkaline earth metal hydroxide. Reaction is performed in a reactor for fluidised bed spray granulation, wherein a solution or suspension of the hydroxide is sprayed onto seed granules of the cyanide being prepared and at the same time a hydrogen cyanide-containing gas is supplied to the reactor and water is evaporated by means of a fluidising gas. The preferred fluidising gas is steam. The reaction gases from a BMA or Andrussow process may be quenched with water and the gas mixture used as fluidising gas. By using a CO2-free HCN-containing gas, alkali metal cyanide granules with an outstanding combination of properties, including a concentration of alkali metal ' carbonate and alkali metal formate together of less then 0.4 wt.%, are obtainable.

公开(公告)号：DE59900384D1

公开(公告)日：2001-12-06

申请号：DE59900384

申请日：1999-03-31

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JUERGEN ,  SCHUETTE RUEDIGER ,  WILDNER WERNER

IPC: B01J8/02 ,  C01B15/029

Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H2 and O2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H2, O2, and H2O vapor. Solutions with high H2O2 concentration can be obtained according to the invention without additional concentration.

公开(公告)号：PL343402A1

公开(公告)日：2001-08-13

申请号：PL34340299

申请日：1999-03-31

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JUERGEN ,  SCHUETTE RUEDIGER ,  WILDNER WERNER

IPC: B01J8/02 ,  C01B15/029

Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H2 and O2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H2, O2, and H2O vapor. Solutions with high H2O2 concentration can be obtained according to the invention without additional concentration.

公开(公告)号：CZ28998A3

公开(公告)日：1998-08-12

申请号：CZ28998

申请日：1998-01-30

Applicant: DEGUSSA

Inventor： SCHUTTE RUDIGER DR ,  ALT HANS CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED DR ,  VON HIPPEL LUKAS DR ,  FEUER OLIVER ,  LOROSCH JURGEN DR

IPC: C01C3/08 ,  C01C3/10 ,  B01J2/04

Abstract: Preparation of alkali or alkaline earth metal cyanide granules involves spraying an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide suspension onto a fluidised product seed bed at 100-250 degrees C in a fluidised bed spray granulation reactor which is supplied with a hydrogen cyanide-containing gas in amount ≥ 1 mol HCN per metal equivalent, the introduced and formed water being evaporated by the fluidising gas supplied at 110-500 degrees C. Also claimed are sodium or potassium cyanide granules having a spherical particle shape with a smooth or raspberry-like surface structure, 0.1-20 mm particle diameter for 99 wt.% of the granules, ≥ 600 g/dm bulk density, less than 1 wt.% wear measured by the roller wear test (Erwaka TAR wear tester, 20 g sample, 60 minutes, 20 rpm.) and a clumping index of NOTGREATER 4 (measured by 14 day 10g load application onto a 100 g sample in a 5.5 cm inside diameter cylinder), the novelty being that the alkali metal carbonate content is less than 0.5 wt.% and the alkali metal formate content is less than 0.3 wt.%, the alkali metal in these by-products being the same as that in the cyanide. Preferably, the total alkali metal carbonate and alkali metal formate content is less than 0.4 wt.% and the granules are prepared by the above process using reaction gas from a BMA process and superheated steam as fluidising gas.

公开(公告)号：TR200002858T2

公开(公告)日：2000-12-21

申请号：TR200002858

申请日：1999-03-31

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JURGEN ,  SCHUTTE RUDIGER ,  WILDNER WERNER

IPC: B01J8/02 ,  C01B15/029

Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H2 and O2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H2, O2, and H2O vapor. Solutions with high H2O2 concentration can be obtained according to the invention without additional concentration.

公开(公告)号：AU3706799A

公开(公告)日：1999-11-01

申请号：AU3706799

申请日：1999-03-31

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JURGEN ,  SCHUTTE RUDIGER ,  WILDNER WERNER

IPC: B01J8/02 ,  C01B15/029

Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H2 and O2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H2, O2, and H2O vapor. Solutions with high H2O2 concentration can be obtained according to the invention without additional concentration.

公开(公告)号：SK14398A3

公开(公告)日：1998-08-05

申请号：SK14398

申请日：1998-02-02

Applicant: DEGUSSA

Inventor： SCHUETTE RUEDIGER ,  ALT HANS-CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED ,  VON HIPPEL LUKAS ,  FEUER OLIVER ,  LOROESCH JUERGEN

IPC: C01C3/08 ,  C01C3/10

Abstract: Preparation of alkali or alkaline earth metal cyanide granules involves spraying an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide suspension onto a fluidised product seed bed at 100-250 degrees C in a fluidised bed spray granulation reactor which is supplied with a hydrogen cyanide-containing gas in amount ≥ 1 mol HCN per metal equivalent, the introduced and formed water being evaporated by the fluidising gas supplied at 110-500 degrees C. Also claimed are sodium or potassium cyanide granules having a spherical particle shape with a smooth or raspberry-like surface structure, 0.1-20 mm particle diameter for 99 wt.% of the granules, ≥ 600 g/dm bulk density, less than 1 wt.% wear measured by the roller wear test (Erwaka TAR wear tester, 20 g sample, 60 minutes, 20 rpm.) and a clumping index of NOTGREATER 4 (measured by 14 day 10g load application onto a 100 g sample in a 5.5 cm inside diameter cylinder), the novelty being that the alkali metal carbonate content is less than 0.5 wt.% and the alkali metal formate content is less than 0.3 wt.%, the alkali metal in these by-products being the same as that in the cyanide. Preferably, the total alkali metal carbonate and alkali metal formate content is less than 0.4 wt.% and the granules are prepared by the above process using reaction gas from a BMA process and superheated steam as fluidising gas.

公开(公告)号：PT1073608E

公开(公告)日：2002-03-28

申请号：PT99919213

申请日：1999-03-31

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  RUDIGER SCHUTTE DR ,  BALDUF TORSTEN ,  BECKER-BALFANZ CATRIN ,  HEMME INA ,  ROLLMANN JURGEN ,  WILDNER WERNER

IPC: B01J8/02 ,  C01B15/029

Abstract: An aqueous solution of hydrogen peroxide is produced by direct synthesis from hydrogen and oxygen in the presence of a heterogeneous catalyst. According to the invention, a gas mixture comprising H2 and O2, essentially saturated or supersaturated with water (=containing fog) is fed into a reactor containing the catalyst. The volume ratio of the gas mixture fed in (standard liters per hour) to liquid removed (liters per hour) is adjusted to a value equal to or greater than 15,000, especially 20,000 to 50,000, and the gas mixture leaving the reactor is recycled after replenishment with H2, O2, and H2O vapor. Solutions with high H2O2 concentration can be obtained according to the invention without additional concentration.

公开(公告)号：CA2328107A1

公开(公告)日：1999-10-21

申请号：CA2328107

申请日：1999-03-31

Applicant: DEGUSSA

Inventor： WILDNER WERNER ,  BERTSCH-FRANK BIRGIT ,  BALDUF TORSTEN ,  ROLLMANN JURGEN ,  SCHUTTE RUDIGER ,  HEMME INA ,  BECKER-BALFANZ CATRIN

IPC: B01J8/02 ,  C01B15/029

Abstract: The invention relates to a method for producing an aqueous solution of hydrogen peroxide from hydrogen and oxygen by direct synthesis in the presence of a heterogeneous catalyst. According to this method, a mixture containing H2 and O2 is supplied to the reactor which contains the catalyst. Said gas mixture is essentially saturated or oversaturated (= containing mist) with water vapour. The volume ratio of gas mixture (Nl/h) supplied to liquid (l/h) taken off is adjusted to values equal to or greater than 15,000, especially 20,000 to 50,000 and the gas mixture leaving the reactor is re-stocked with H2, O2 and H2O vapour and recycled. According to the invention, solutions with a high concentration of H2O2 can be obtained without any further concentration.