11.
    发明专利
    未知

    公开(公告)号:NO173937C

    公开(公告)日:1994-02-23

    申请号:NO873338

    申请日:1987-08-10

    Applicant: DEGUSSA

    Abstract: Mixtures of sulfurous triazine compounds and methods of preparing these compounds with the general formula I in which R1, R2=H,R2=benzyl, R2, R3, R4=C1-C8-alkyl, allyl, C3-C8 cycloalkyl, the latter unsubstituted or substituted with 1-3 methyl groups, 2-hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl or R3 and R4 (together): C4-C6-alkylene, -(CH2-CHX)2 Y with X=H, CH3, Y=O,S, Sa: Polysulfide chain with 2-10 S atoms (i.e. 2 I in which R1, R2, R3, R4 have the meanings indicated above is reacted with an ammonium polysulfide or alkali polysulfide and dissolved in a protic polar solvent, especially water, at a temperature of 80 DEG to 140 DEG C.

    14.
    发明专利
    未知

    公开(公告)号:MX163305A

    公开(公告)日:1992-04-14

    申请号:MX1174788

    申请日:1988-06-02

    Applicant: DEGUSSA

    Abstract: Encapsulation pigments comprising chromophoric particles embedded in glaze-stable casings are prepared by means of calcination from the appropriate initial products. High yields and strong color intensities are obtained if the chromophoric substance or its initial compounds are bound in and/or to a zeolite and are calcined in this form with the remaining constituents.

    20.
    发明专利
    未知

    公开(公告)号:BR8803516A

    公开(公告)日:1989-02-08

    申请号:BR8803516

    申请日:1988-07-13

    Applicant: DEGUSSA

    Abstract: A specific form of surface coating of Al2O3 catalysts, using additional amounts of aluminium ions and minimum amounts of platinum ions, made it possible to use Al2O3 as a catalyst for long-term operation (150 days and more) in the preparation of hydrogen cyanide from hydrocarbons and ammonia, preferably in the BMA process.

Patent Agency Ranking