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    Improvements in the production of high percentage nitric oxide
    1.
    发明专利
    Improvements in the production of high percentage nitric oxide 未知

    公开(公告)号：GB843597A

    公开(公告)日：1960-08-04

    申请号：GB1118259

    申请日：1959-04-02

    Applicant: BASF AG

    Inventor： KRAUSS KURT ,  DIEKMANN HEINRICH

    IPC: C01B21/24 ,  C01B21/26

    Abstract: Nitric oxide is produced by reaction of ammonia (1 volume) with oxygen (1.28-1.4, e.g. 1.33 volumes) in presence of (a) a Pt (e.g. Pt-Rh) catalyst and (b) steam. Preferably the steam is separated from the reaction gas by condensation as dilute nitric acid, the latter being used to wash the reaction gas; it is particularly preferred to treat the washed gas with an alkaline reagent such as 10% NaOH.

    Production of precipitated calcium carbonate
    3.
    发明专利
    Production of precipitated calcium carbonate 未知

    公开(公告)号：GB921077A

    公开(公告)日：1963-03-13

    申请号：GB3067661

    申请日：1961-08-25

    Applicant: BASF AG

    Inventor： DIEKMANN HEINRICH ,  ZAPP KARL-HEINZ

    IPC: C01F11/18 ,  C08K3/26 ,  C09C1/02

    Abstract: Finely divided, substantially pure calcium carbonate is produced by the reaction between aqueous calcium salt solutions, e.g. the nitrate or chloride, and aqueous solutions of ammonium, sodium or potassium carbonates in the presence of water soluble fluorides, e.g. those of sodium, potassium or ammonium. The fluoride is preferably present in the proportion of 0,05-5 parts by weight per 100 parts by weight of the carbonate. After precipitation and filtration the filtrate contains no measurable amount of fluorine. The example refers to calcium carbonate being precipitated from a calcium chloride solution by the addition of ammonium carbonate solution containing 0,2% of potassium fluoride based on the carbonate. The calcium carbonate so produced has a particle size of 0,1m , a fluoride content of 0,09%, and the settling volume of a suspension of 10 g. in 100 c.c. of water is 99 c.c. after two hours.

    Ammonium nitrate of low hygroscopicity and high bulk density and a process for the production thereof
    7.
    发明专利
    Ammonium nitrate of low hygroscopicity and high bulk density and a process for the production thereof 未知

    公开(公告)号：GB929132A

    公开(公告)日：1963-06-19

    申请号：GB2720861

    申请日：1961-07-27

    Applicant: BASF AG

    Inventor： DIEKMANN HEINRICH ,  OPP KARL ,  ROOS HERBERT ,  SCHULZ HANS

    IPC: B01J2/30 ,  C01C1/18 ,  C05C1/02 ,  C06B23/00

    Abstract: Ammonium nitrate of high bulk density and low hygroscopicity is produced by adding sodium, magnesium and phosphate ions at a stage in the processing prior to granulation. At least 0,1% sodium ions and 0,5% phosphate ions are added as Na3PO4, or Na2HPO4, or Na+ is added separately as one or more of the salts NaCl, NaNo3, NaF and Na2SO4, and phosphate ion is added as one or more of (NH4)3PO4, (NH4)2HPO4, Ca3(PO4)2, MgHPO4 K2HPO4, and K3PO4. At least 0,1% of Mg++ is added as Mg(NO3)2, MgSO4, MgCl2, or together with phosphate as Mg(NH4)PO4. The preferred proportions of salts are such that 0,3 to 1,0% of each ion, calculated as the oxide P2O5, Na2O and MgO, is present. The salts are added either during neutralization of the nitric acid by NH3, or to the resultant NH4NO3 solution before, or after, concentration, i.e. to an aqueous NH4NO3 solution, or melt. Specification 800,794 is referred to.ALSO:Ammonium nitrate of high bulk density and low hygroscopicity is produced by adding sodium, magnesium, and phosphate ions at a stage in the processing prior to granulation. At least 0,1% sodium ions and 0,05% phosphate ions are added as Na3PO4, or Na2HPO4, or Na+ is added separately as one or more of the salts NaCl, NaNO3, NaF, and Na2SO4, and phosphate ion is added as one or more of (NH4)3PO4, (NH4)2HPO4, Ca3(PO4)2, MgHPO4, K2HPO4, and K3PO4. At least 0,1% Mg++ is added as Mg(NO3)2, MgSO4, MgCl2, or together with phosphate as Mg(NH4)PO4. The preferred proportions of salts are such that 0,3 to 1,0% of each ion, calculated as the oxides P2O5, Na2O, and MgO, is present. The salts are added either during neutralisation of the nitric acid by NH3, or to the resultant NH4NO3 solution before, or after, concentration, i.e. to an aqueous NH4NO3 solution, or melt. Specification 800,794 is referred to.

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