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    51.
    发明专利
    未知

    公开(公告)号：DE3347259A1

    公开(公告)日：1985-07-11

    申请号：DE3347259

    申请日：1983-12-28

    Applicant: BASF AG

    Inventor： WEISS FRANZ-JOSEF DR ,  HABERMANN WOLFGANG ,  HAMMES PETER DR ,  FROMMER ELMAR DR ,  THOMAS ERWIN ,  THOMA PETER DR

    IPC: C25B3/00 ,  C01B21/14 ,  C25B1/00

    Abstract: Aqueous solutions of hydroxylamine are prepared from aqueous hydroxylammonium salt solutions by electrodialysis by a method in which the aqueous hydroxylammonium salt solution is fed into the middle zone of an electrolysis cell, which is divided into a cathode zone, an anode zone and a middle zone by means of semipermeable membranes, and is electrolyzed, and the catholyte used is an alkali metal hydroxide solution containing ammonia and/or amines.

    57.
    发明专利
    未知

    公开(公告)号：DE3107702A1

    公开(公告)日：1982-09-16

    申请号：DE3107702

    申请日：1981-02-28

    Applicant: BASF AG

    Inventor： GROSSKINSKY OTTO-ALFRED DIPL C ,  FROMMER ELMAR DIPL CHEM DR ,  RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN

    IPC: C01B21/14

    Abstract: An improved process for the continuous preparation of hydroxylammonium salts by catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended noble metal catalyst at an elevated temperature in several reaction zones connected in series, wherein the improvement comprises maintaining a pH of

    PROCESS FOR PREPARING HYDROXYLAMMONIUM SALTS IN REACTORS MADE FROM STAINLESS STEEL
    59.
    发明专利
    PROCESS FOR PREPARING HYDROXYLAMMONIUM SALTS IN REACTORS MADE FROM STAINLESS STEEL 未知

    公开(公告)号：DE2860884D1

    公开(公告)日：1981-10-29

    申请号：DE2860884

    申请日：1978-09-25

    Applicant: BASF AG

    Inventor： RAPP GUENTHER DR ,  JOCKERS KURT DR ,  THOMAS ERWIN

    IPC: B01J23/00 ,  C01B21/14 ,  C22C38/50

    Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction is carried out in vessels of which the walls consist of conventional copper-free molybdenum-containing austenitic chromium-nickel steels which contain from 16 to 28% by weight of chromium, from 20 to 50% by weight of nickel, from 1 to 4% by weight of molybdenum and at most 0.1% by weight of carbon and which in addition contain an amount of titanium which is at least 5 times the amount of carbon but is not more than 1.0% by weight, or an amount of niobium or tantalum which is at least 8 times the amount of carbon but is not more than 1.5% by weight. The present invention relates to a process for the manufacture of of hydroxylammonium salts by catalytically reducing nitric oxide with hydrogen in a dilute aqueous mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, using corrosion-resistant materials of construction.

    60.
    发明专利
    未知

    公开(公告)号：DE2736872A1

    公开(公告)日：1979-02-22

    申请号：DE2736872

    申请日：1977-08-16

    Applicant: BASF AG

    Inventor： RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN ,  WOLF DIETER DIPL ING DR ,  KUERTEN HERIBERT DIPL ING DR ,  ZEHNER PETER DIPL ING DR

    IPC: B01J10/00 ,  B01J19/24 ,  B01J19/26 ,  B01J23/00 ,  C01B21/14

    Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction mixture is recycled and the gas mixture, containing nitric oxide and hydrogen, present in the gas space above the reaction zone, is introduced, by means of one or more downwardly directed jets of liquid, consisting of the recycled reaction mixture and issuing from a nozzle orifice, into one or more circulation zones which are present in the reaction zone, are open at both sides, extend in the direction of the entering jet of liquid and are completely covered by the reaction mixture, the reaction mixture leaving the bottom of the circulation zone and containing unconverted gases is deflected, passed upwards in the annular zone externally surrounding the circulation zone, and at the same time reaction mixture of low gas content is recycled from a separation zone located under the reaction zone.

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