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    12.
    发明专利
    未知

    公开(公告)号：DE3685796D1

    公开(公告)日：1992-07-30

    申请号：DE3685796

    申请日：1986-09-22

    Applicant: DEGUSSA

    Inventor： KLEINSCHMIT PETER ,  KRIECHBAUM GANGOLF ,  STRACK HANS

    IPC: C01B39/24 ,  C01B33/26 ,  C01B39/20

    Abstract: Prodn. of a seeding mixt. for faujasite synthesis comprises (i) diluting aq. NaOH soln. with water, while stirring, and heating to 50-80 deg.C; (ii) adding pptd. silicic acid; (iii) cooling the mixt. to 30-70 deg.C; (iv) adding aq. sodium aluminate soln. and then water, so as to give a mixt. of the compsn. 9-15 Na2O:Al2O3:9-15 SiO2:140-260 H2O; and (v) ageing the mixt. at 30-40 deg.C for 18-72 hrs. The concn. of the aq. NaOH is pref. about 50%. The pptd. silicic acid can be used as powder or filter cake; it has e.g. 6% drying loss (105 deg.C), 5% ignition loss (1000 deg.C); and Na2O content 1%. The sodium aluminate soln. contains 100-200 g/l Al2O3 and 150-300 g/l Na2O. The seeding mixt. is pref. stored at 35 deg.C. A tendency to gel after a certain period of storage causes no handling problems if the mixt. is stored in a stirred vessel.

    16.
    发明专利
    未知

    公开(公告)号：FI72436B

    公开(公告)日：1987-02-27

    申请号：FI810440

    申请日：1981-02-13

    Applicant: DEGUSSA ,  HENKEL KGAA

    Inventor： STRACK HANS

    IPC: C11D3/12 ,  B01J20/18 ,  B01J39/14 ,  C01B20060101 ,  C01B33/26 ,  C01B39/16 ,  C11D3/08 ,  C01B33/28

    Abstract: There is produced crystalline zeolite powder of Type A having an average particle diameter of 7 to 8.5 mu by introducing the components waterglass and alkali aluminate liquor under defined conditions simultaneously into a receiver containing water, stirring, subsequently first adding more alkali aluminate liquor and then more waterglass solution. The thus obtained crystalline zeolite powder is used as a phosphate substitute in washing agents.

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