公开(公告)号：CA2084854A1

公开(公告)日：1993-06-15

申请号：CA2084854

申请日：1992-12-08

Applicant: HOECHST AG

Inventor： BETTERMANN GERHARD ,  SCHIMMEL GUENTHER ,  HIMMRICH JOHANNES

IPC: C09K3/18 ,  C23F11/06

Abstract: HOE 91/H 030 Process for the preparation of alkali metal acetates To prepare a corrosion-inhibitlng liquid de-icing agent based on alkali metal acetates, 30 to 50 percent strength by weight alkali metal hydroxide solution is introduced into a reaction container provided with a cooling device and a mixing device, and 85 to 100% strength acetic acid is metered into the reaction container until the ratio by weight of acetic acid to alkali metal hydroxide solution therein (0.30 to 0.45) : 1. A portion of this solution is transferred from the reaction container to a stirred dissolving tank and 0.03 to 1% by weight, relative to the batch, of benzotriazole and/or tolyltriazole and/or imidazole is dissolved therein. The resulting solution containing azole is introduced into the reaction container along with 0.01 to 0.2% by weight of phosphoric acid, relative to the batch. Acetic acid continues to be metered into the reaction container until the density of the solution in the reaction container is 1.07 to 1.39 g/cm3 at 20.degree.C. Small amounts of alkali metal hydroxide solution or acetic acid are then introduced into the reaction container until the pH of the solution therein is 9.2 to 9.8. Finally, this solution is withdrawn from the reaction container as a liquid de-icing agent.

公开(公告)号：HU913423D0

公开(公告)日：1992-01-28

申请号：HU342391

申请日：1991-10-31

Applicant: HOECHST AG

Inventor： STANKOWIAK ACHIM ,  KAPFINGER JOSEF ,  BETTERMANN GERHARD

IPC: C09K3/18 ,  E01H10/00

Abstract: The deicing agent described comprises an aqueous solution of at least one alkali metal acetate or at least one alkaline earth metal acetate or a mixture of the two, and water as the principal components, and from 0.01 to 1% by weight of at least one water-soluble triazole compound or at least one water-soluble imidazole compound or a mixture of the two, and optionally from 0.01 to 0.5% by weight of at least one alkali metal phosphate as inhibitors. The process described for melting snow and ice on traffic surfaces comprises applying the novel deicing agent in an effective amount to the ice- and/or snow-covered surfaces to be treated.

公开(公告)号：ZA891571B

公开(公告)日：1989-11-29

申请号：ZA891571

申请日：1989-03-01

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTHER ,  GUENTHER SCHIMMEL ,  KOLKMANN FRIEDRICH ,  FRIEDRICH KOLKMANN ,  BETTERMANN GERHARD ,  GERHARD BETTERMANN ,  HEYMER GERO ,  GERO HEYMER

IPC: C01B25/234 ,  C01B25/235 ,  C01B25/46 ,  C01B ,  B01J ,  B01D

Abstract: A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100 DEG to 200 DEG C., preferably 140 DEG to 160 DEG C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85 DEG to 90 DEG C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m2/g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m3/h of wet-process phosphoric acid per m3 of activated charcoal bed.

公开(公告)号：NO302483B1

公开(公告)日：1998-03-09

申请号：NO914287

申请日：1991-11-01

Applicant: HOECHST AG

Inventor： STANKOWIAK ACHIM ,  KAPFINGER JOSEF ,  BETTERMANN GERHARD

IPC: C09K3/18 ,  E01H10/00

Abstract: The deicing agent described comprises an aqueous solution of at least one alkali metal acetate or at least one alkaline earth metal acetate or a mixture of the two, and water as the principal components, and from 0.01 to 1% by weight of at least one water-soluble triazole compound or at least one water-soluble imidazole compound or a mixture of the two, and optionally from 0.01 to 0.5% by weight of at least one alkali metal phosphate as inhibitors. The process described for melting snow and ice on traffic surfaces comprises applying the novel deicing agent in an effective amount to the ice- and/or snow-covered surfaces to be treated.

公开(公告)号：NO914287A

公开(公告)日：1992-05-04

申请号：NO914287

申请日：1991-11-01

Applicant: HOECHST AG

Inventor： STANKOWIAK ACHIM ,  KAPFINGER JOSEF ,  BETTERMANN GERHARD

IPC: C09K3/18 ,  E01H10/00

CPC classification number: C09K3/185 ,  C09K3/18

公开(公告)号：ZA8901571B

公开(公告)日：1989-11-29

申请号：ZA8901571

申请日：1989-03-01

Applicant: HOECHST AG

Inventor： SCHIMMEL GUENTHER ,  GUENTHER SCHIMMEL ,  KOLKMANN FRIEDRICH ,  FRIEDRICH KOLKMANN ,  BETTERMANN GERHARD ,  GERHARD BETTERMANN ,  HEYMER GERO ,  GERO HEYMER

IPC: C01B25/234 ,  C01B25/235 ,  C01B25/46 ,  C01B ,  B01D ,  B01J

CPC classification number: C01B25/461 ,  C01B25/235

公开(公告)号：HRP940843A2

公开(公告)日：1997-02-28

申请号：HRP940843

申请日：1994-10-26

Applicant: HOECHST AG ,  RUHRCHEMIE AG

Inventor： STANKOWIAK ACHIM ,  KAPFINGER JOSEF ,  BETTERMANN GERHARD

IPC: C09K3/18 ,  E01H10/00

Abstract: The deicing agent described comprises an aqueous solution of at least one alkali metal acetate or at least one alkaline earth metal acetate or a mixture of the two, and water as the principal components, and from 0.01 to 1% by weight of at least one water-soluble triazole compound or at least one water-soluble imidazole compound or a mixture of the two, and optionally from 0.01 to 0.5% by weight of at least one alkali metal phosphate as inhibitors. The process described for melting snow and ice on traffic surfaces comprises applying the novel deicing agent in an effective amount to the ice- and/or snow-covered surfaces to be treated.

公开(公告)号：HUT59438A

公开(公告)日：1992-05-28

申请号：HU342391

申请日：1991-10-31

Applicant: HOECHST AG

Inventor： STANKOWIAK ACHIM ,  KAPFINGER JOSEF ,  BETTERMANN GERHARD

IPC: C09K3/18 ,  E01H10/00

Abstract: The deicing agent described comprises an aqueous solution of at least one alkali metal acetate or at least one alkaline earth metal acetate or a mixture of the two, and water as the principal components, and from 0.01 to 1% by weight of at least one water-soluble triazole compound or at least one water-soluble imidazole compound or a mixture of the two, and optionally from 0.01 to 0.5% by weight of at least one alkali metal phosphate as inhibitors. The process described for melting snow and ice on traffic surfaces comprises applying the novel deicing agent in an effective amount to the ice- and/or snow-covered surfaces to be treated.

公开(公告)号：PH25359A

公开(公告)日：1991-05-13

申请号：PH38173

申请日：1989-02-08

Applicant: HOECHST AG

Inventor： SCHIMMEL GUNTHER ,  BETTERMANN GERHARD ,  HEYMER GERO ,  KOLKMANN FRIEDRICH

IPC: C01B25/234 ,  C01B25/235 ,  C01B25/46

Abstract: A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100 DEG to 200 DEG C., preferably 140 DEG to 160 DEG C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85 DEG to 90 DEG C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m2/g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m3/h of wet-process phosphoric acid per m3 of activated charcoal bed.

公开(公告)号：MX169786B

公开(公告)日：1993-07-26

申请号：MX1512789

申请日：1989-03-02

Applicant: HOECHST AG

Inventor： KOLKMANN FRIEDRICH ,  SCHIMMEL GUNTHER ,  BETTERMANN GERHARD ,  HEYMER GERO

IPC: C01B25/234 ,  C01B25/235 ,  C01B25/46 ,  C01B25/222 ,  B01J20/20

Abstract: A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100 DEG to 200 DEG C., preferably 140 DEG to 160 DEG C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85 DEG to 90 DEG C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m2/g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m3/h of wet-process phosphoric acid per m3 of activated charcoal bed.