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    PRODUCTION OF RED TO YELLOW PIGMENTS BASED ON NITRIDE AND OXYNITRIDE
    1.
    发明专利
    PRODUCTION OF RED TO YELLOW PIGMENTS BASED ON NITRIDE AND OXYNITRIDE 失效

    公开(公告)号：JP2000247646A

    公开(公告)日：2000-09-12

    申请号：JP2000043265

    申请日：2000-02-21

    Applicant: DMC2 DEGUSSA METALS CATALYSTS CERDEC AG

    Inventor： JANSEN MARTIN ,  GUENTHER EBERHARD ,  LETSCHERT HANS-PETER DR

    IPC: C01G35/00 ,  C01B21/06 ,  C01B21/082 ,  C09C1/62 ,  C09C3/06

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing red to yellow pigments based on nitrides and oxynitrides, which is easily carried out on an industrial scale. SOLUTION: When the red to yellow pigments are produced by using nitrides or oxynitrides, each containing at least one metal having a valence in the range of +3-+5, a mixture of powdered metal compounds or metal compounds selected from the group of oxides, hydroxides, mixed oxides, carbonates, nitrates, oxynitrides having a degree of nitration less than that of the oxynitrides to be produced, halides, oxyhalides, and nitridehalides is nitrated by ammonia fluidizing on the metal compounds at 700-1,250 deg.C using a rotary tube reactor or fluidized layer reactor in the presence of at least one powdered oxide which is selected from the group of SiO2, GeO2, SnO2, TiO2, ZrO2 and HfO2 and which is uniformly dispersed in the metal compounds to be nitrated.

    2.
    发明专利
    未知

    公开(公告)号：DE19907618A1

    公开(公告)日：2000-08-24

    申请号：DE19907618

    申请日：1999-02-23

    Applicant: DMC2 DEGUSSA METALS CATALYSTS

    Inventor： JANSEN MARTIN ,  GUENTHER EBERHARD ,  LETSCHERT HANS-PETER

    IPC: C01G35/00 ,  C01B21/06 ,  C01B21/082 ,  C09C1/62 ,  C09C3/06

    Abstract: Nitriding of powdered metal compound(s) is carried out in a rotating tubular or fluidized bed reactor. Process for the production of a red-yellow pigment based on a nitride or oxynitride with a metal having a valency of +3 to +5 comprises nitriding a powdered metal compound or a mixture of metal compounds selected from oxides, oxide hydrates, mixed oxides, carbonates, nitrates, oxide nitrates with a low degree of nitriding, halides, oxide halides and nitride halides with ammonia flowing over the metal compound(s) at 700-1250 degrees C. The oxygen of an oxide nitride to be formed originates from the metal compound(s). Nitriding is carried out in a rotating tubular or fluidized bed reactor.

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