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    Improvements in the production and regeneration of platinumcarrier catalysts for thesynthesis of hydroxylamine from nitric oxide and hydrogen
    4.
    发明专利
    Improvements in the production and regeneration of platinumcarrier catalysts for thesynthesis of hydroxylamine from nitric oxide and hydrogen 未知

    公开(公告)号：GB886801A

    公开(公告)日：1962-01-10

    申请号：GB1195560

    申请日：1960-04-05

    Applicant: BASF AG

    Inventor： JOCKERS KURT ,  MEIER HERMANN

    IPC: B01J21/18 ,  B01J21/20 ,  B01J23/40 ,  B01J23/42 ,  B01J23/58 ,  B01J23/96 ,  B01J27/13 ,  C01B21/14

    Abstract: Platinum catalysts, for the synthesis of hydroxylamine from nitric oxide and hydrogen in the presence of dilute mineral acids, are produced or regenerated by a process wherein an aq. PtIV salt solution is first reduced to the PtII stage in presence of graphite or activated charcoal (as carrier) at a chloride ion concentration which is a multiple of (e.g. 20-50 times) the molar Pt concentration of the initial solution and at pH 3-7, by a selective reducing agent, the Pt being then precipitated on the carrier at pH 2,3-4,0 by a strong reducing agent. The selective reducing agent is preferably sodium dithionite or its reaction product obtained by hydrolysis and addition of formaldehyde (e.g. sodium hydroxymethanesulphinate), or sulphurous acid and its compounds such as the sodium and calcium salts. The strong reducing agent is preferably formic acid or its sodium or calcium salt. The PtIV solution may be formed by the action of aqua regin on Pt , e.g. in a catalyst requiring regeneration. Specifications 624,353, 667,870, 714,226, 720,796, 736,632, 772,693 and U.S.A. Specifications 2,658,028, 2,767,147, 2,798,791, 2,834,740 and 2,861,960 are referred to.

    5.
    发明专利
    未知

    公开(公告)号：FR1502586A

    公开(公告)日：1967-11-18

    申请号：FR86034

    申请日：1966-12-02

    Applicant: BASF AG

    Inventor： JOCKERS KURT ,  MEIER HERMANN ,  TAGLINGER LUDWIG

    IPC: C01B21/24

    Abstract: 1,159,399. Nitric oxide. BADISCHE ANILIN- & SODA-FABRIK A.G. 2 Dec., 1966 [4 Dec., 1965]. No. 54079/66. Heading C1A. Nitric oxide is produced by reacting sulphur with aqueous nitric acid at an HNO 3 ; S molar ratio of at least 4 : 3 in a reactor at 350- 650‹ C. The sulphur may be supplied to the reactor in vapour or liquid form, in the latter case by spraying, and the nitric acid in vapour form. The nitric acid used may have a concentration of 30-70 wt. per cent. At an HNO 3 : S molar ratio of 4 : 3 the principal by-product is SO 2 , and at 6 : 3 or more it is H 2 SO 4 . In the latter case, nitric oxide of 99% purity and pure dilute sulphuric acid may be obtained by passing the hot reaction gases to a distillation column, separately condensing out the sulphuric acid and any excess nitric acid present, and freeing the NO from other nitrogen oxides by washing with e.g. caustic soda solution.

    Purification of dilute commercial sulfuric acid
    7.
    发明专利
    Purification of dilute commercial sulfuric acid 未知

    公开(公告)号：GB935877A

    公开(公告)日：1963-09-04

    申请号：GB3816561

    申请日：1961-10-25

    Applicant: BASF AG

    Inventor： JOCKERS KURT ,  MEIER HERMANN

    IPC: C01B17/90 ,  C01B21/14

    Abstract: Inorganic or organic impurities are removed from dilute sulphuric acid by treatment with hydrogen sulphide in preferred amount 5-50 mg./litre, in the presence of active carbon, and after separating the active carbon from the sulphuric acid the remainder of the hydrogen sulphide is destroyed with hydrogen peroxide in the presence of active carbon. The hydrogen sulphide may be added as such or produced in situ by adding a solution of sodium sulphide, sodium hydrogen sulphide, ammonium sulphide or calcium sulphide. The acid containing hydrogen sulphide is passed through a first tower packed with active carbon having a surface area of 1000 mg.2-1 and a grain size of 3 mm., in 5-10 minutes. Excess hydrogen peroxide, e.g. 25-250 mg. per litre is added and the liquid is passed through a second tower packed with active carbon, in 3-6 minutes. Four organic p impurities are present, the impure acid may be pretreated by passage through a tower containing active carbon before treatment with hydrogen sulphide.

    Production of Nitric Oxide
    10.
    发明专利
    Production of Nitric Oxide 未知

    公开(公告)号：GB1159399A

    公开(公告)日：1969-07-23

    申请号：GB5407966

    申请日：1966-12-02

    Applicant: BASF AG

    Inventor： JOCKERS KURT ,  MEIER HERMANN ,  TAGLINGER LUDWIG

    IPC: C01B21/24

    Abstract: 1,159,399. Nitric oxide. BADISCHE ANILIN- & SODA-FABRIK A.G. 2 Dec., 1966 [4 Dec., 1965]. No. 54079/66. Heading C1A. Nitric oxide is produced by reacting sulphur with aqueous nitric acid at an HNO 3 ; S molar ratio of at least 4 : 3 in a reactor at 350- 650‹ C. The sulphur may be supplied to the reactor in vapour or liquid form, in the latter case by spraying, and the nitric acid in vapour form. The nitric acid used may have a concentration of 30-70 wt. per cent. At an HNO 3 : S molar ratio of 4 : 3 the principal by-product is SO 2 , and at 6 : 3 or more it is H 2 SO 4 . In the latter case, nitric oxide of 99% purity and pure dilute sulphuric acid may be obtained by passing the hot reaction gases to a distillation column, separately condensing out the sulphuric acid and any excess nitric acid present, and freeing the NO from other nitrogen oxides by washing with e.g. caustic soda solution.

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