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    71.
    发明专利
    未知

    公开(公告)号：DE3926595A1

    公开(公告)日：1991-02-14

    申请号：DE3926595

    申请日：1989-08-11

    Applicant: DEGUSSA

    Inventor： KLOCKNER HANS-JUERGEN DR ,  SCHMOLL RALF DR ,  PANSTER PETER DR ,  KLEINSCHMIT PETER DR

    IPC: C01B6/00 ,  C01B33/04 ,  C01B33/107 ,  C07F7/08

    Abstract: The invention relates to a process for the hydrogenation of halogen-substituted compounds of elements of Periods 2 to 4 of Groups III to V of the Periodic Table with the exception of gallium, aluminium, carbon and nitrogen, which is characterised in that …… a) finely-particulate aluminium is added to a salt melt composed of 50 to 67 mol% of AlCl3 (anhydrous) and 50 to 33 mol% of sodium chloride, … b) hydrogen is introduced into the stirred suspension, or the suspension which is dispersed by other means, so as to hydrogenate the finely-divided aluminium, … c) the resulting mixture is subsequently reacted with the halogen-substituted compound … and … d) the hydrogenated compound is isolated. …

    74.
    发明专利
    未知

    公开(公告)号：DE3482583D1

    公开(公告)日：1990-08-02

    申请号：DE3482583

    申请日：1984-03-23

    Applicant: DEGUSSA

    Inventor： STRACK HANS DR ,  KLEINSCHMIT PETER DR

    IPC: C01B39/00 ,  B01J20/18 ,  C01B39/14 ,  C01B39/22 ,  C01B39/24 ,  C01B39/26 ,  C01B39/36 ,  C04B33/34

    Abstract: Silicate-bound zeolite granulates are disclosed wherein the zeolite contains a cation which is not present in the binder, and where the zeolite can also contain the binder cation. The granulates are produced by placing powdered zeolite in a mixer, adding sodium silicate solution, mixing until zeolite granulates with a grain size of at least 0.1 mm are obtained, optionally after-rolling the zeolite granulates. The moist zeolite granulates can be initially dried at temperatures of 20 degrees to 39 degrees C., where the carbon dioxide content of the drying air is adjusted to less than 200 ppm. Thereafter, a second drying step can be carried out at temperatures of 40 degrees to 120 degrees C. as well as a third drying stage at 121 degrees to 200 degrees C. under otherwise identical conditions. The products may be activated at temperatures of 600 degrees C. maximum. The zeolite granulates thus obtained are then treated with a first aqueous metal salt solution, washed and then optionally treated with a second aqueous metal salt solution, washed and dried again at 40 degrees to 200 degrees C., preferably 100 degrees to 120 degrees C., and then optionally calcined to 300 degrees to 650 degrees C.

    Pptd. silica prodn. by hydrolysis of silicon tetra:chloride - by dropwise addn. of water or silicon tetra:chloride to other reactant which is mixed or dissolved in organic solvent
    77.
    发明专利
    Pptd. silica prodn. by hydrolysis of silicon tetra:chloride - by dropwise addn. of water or silicon tetra:chloride to other reactant which is mixed or dissolved in organic solvent 未知

    公开(公告)号：DE3937394A1

    公开(公告)日：1990-05-23

    申请号：DE3937394

    申请日：1989-11-10

    Applicant: DEGUSSA

    Inventor： PAULI INGO DR ,  KLEINSCHMIT PETER DR ,  SCHWARZ RUDOLF DR

    IPC: C01B33/18

    Abstract: Silicic acids (I) are produced by hydrolysis of SiCl4 (II) with water in the presence of an organic solvent system (III), the novelty is that either (II) or the water is added dropwise, in pure form, to the other reactant (water or (II)) which is in the form of a mixt. or in soln. with (III). (III) is e.g. hydrocarbon, ether (e.g. THF), EtOAc, CHCl3, acetone, silicone oil, AcOH etc. or a mixt. thereof, pref. (II) is added to the aq. phase (esp. at 0-10 deg.C for prodn. of spherical (I)). USE/ADVANTAGE - The process enables the prodn. of hydrophobic pptd. silica in one step (if the solvent contains a siloxane or a silicone oil), with BET surface and particle size distribution tailored to requirements (by adjusting the process conditions), the prod. is pref. obtd. as compact 20-100 micron spheres, useful e.g. as a catalyst support, foam suppressant, matting agent, silicone rubber filler, etc.

    Doped alkaline earth metal and lead ferrite prodn.
    78.
    发明专利
    Doped alkaline earth metal and lead ferrite prodn. 未知

    公开(公告)号：DE3922747A1

    公开(公告)日：1990-03-08

    申请号：DE3922747

    申请日：1989-07-11

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH DR ,  HALBRITTER GUENTER ,  KLEINSCHMIT PETER DR

    IPC: G11B5/706

    Abstract: Prodn. of finely divided flakes of doped alkaline earth metal and lead ferrites, for data carriers, from raw ferrite materials or impure ceramic raw materials involves (a) dissolving the starting substances by digestion with molten basic alkali metal cpds. in excess; (b) dissolving the melt in water to obtain a precursor; and (c) heat treating the filtered-off precursor for 0.5-6 hrs. at 600-950 deg.C.

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