公开(公告)号：NO138996B

公开(公告)日：1978-09-11

申请号：NO753664

申请日：1975-10-31

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01B13/14 ,  C01B33/18 ,  C01G1/02

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：FI752976A

公开(公告)日：1977-01-31

申请号：FI752976

申请日：1975-10-24

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01G

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：FI61854C

公开(公告)日：1982-10-11

申请号：FI752976

申请日：1975-10-24

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01G1/02 ,  C01B13/14 ,  C01B33/18

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：DD151296A5

公开(公告)日：1981-10-14

申请号：DD22161780

申请日：1980-06-05

Applicant: DEGUSSA

Inventor： HECKEL EMIL ,  SEYS FREDDY ,  BAECKELMANS RENE ,  HEILMANN WOLFGANG

IPC: B01D53/68 ,  C01B13/22 ,  C01B13/24 ,  C01B33/16 ,  C01B33/18 ,  C01F7/30 ,  C01G1/02 ,  C01G23/07 ,  C01B33/12

Abstract: The residual gas obtained in the pyrogenic production of metal oxides or metalloid oxides contain besides the desired product elemental chlorine if a chlorine containing starting material is employed. After cooling the residual gas the elemental chlorine is reacted to form hydrogen chloride by using an aqueous solution of a reducing agent and in this form the chlorine is subsequently washed out of the residual gas.

公开(公告)号：FI61854B

公开(公告)日：1982-06-30

申请号：FI752976

申请日：1975-10-24

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01G1/02 ,  C01B13/14 ,  C01B33/18

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：DK145890C

公开(公告)日：1983-10-17

申请号：DK458475

申请日：1975-10-10

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01B13/14 ,  C01B33/18 ,  C01G1/02

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：CH615892A5

公开(公告)日：1980-02-29

申请号：CH1401575

申请日：1975-10-29

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01B13/14

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：NO138996C

公开(公告)日：1978-12-20

申请号：NO753664

申请日：1975-10-31

Applicant: DEGUSSA

Inventor： HECKEL EMIL

IPC: C01B33/12 ,  C01B13/24 ,  C01B13/30 ,  C01B33/16 ,  C01F7/30 ,  C01G23/07 ,  C01B13/14 ,  C01B33/18 ,  C01G1/02

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

公开(公告)号：CA899031A

公开(公告)日：1972-05-02

申请号：CA899031D

Applicant: DEGUSSA

Inventor： HECKEL EMIL ,  MEYER-SIMON EUGEN ,  DUSING GERHARD ,  RENNGARDT FRANZISKA