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    IRON-BLUE PIGMENT, PROCESS FOR PREPARING IT AND ITS USE
    1.
    发明专利
    IRON-BLUE PIGMENT, PROCESS FOR PREPARING IT AND ITS USE 未知

    公开(公告)号：DE3162809D1

    公开(公告)日：1984-04-26

    申请号：DE3162809

    申请日：1981-08-11

    Applicant: DEGUSSA

    Inventor： GRATZFELD EVERHARD ,  CLAUSEN EVA ,  REINHARDT HELMUT DR ,  SCHAEFER HANS DR

    IPC: C09D11/00 ,  C01C3/12 ,  C01G49/00 ,  C09C1/00 ,  C09C1/22 ,  C09C1/26 ,  C09D11/02

    Abstract: Iron blue pigment (DIN 55 906) is produced by white paste precipitation and subsequent oxidation of the white paste. Alkali or alkali metal ions i.e. sodium and potassium ions, cyanide or complex iron cyanide ions and iron ions are used as raw materials. The iron blue pigment according to the invention is characterized by a potassium content of 7.0-9.0% by weight, preferably 7.6-9.0% by weight, a sodium content of 0.5-2.0% by weight, preferably 0.5-1.5% by weight, a coloring power according to DIN 53 204 and DIN 53 234 of 5-15% above the Vossen Blue 705 Standard and the following color intervals (determined in accordance with DIN 53 204 and DIN 53 234 in conjunction with DIN 6174, in relation to Vossen Blue 705 as standard): DELTA L: -0.7 to -1.5 DELTA a: -0.5 to +0.3 DELTA b: -0.6 to -2.3 DELTA C: +0.5 to +2.0 In order to save potassium ions, the white paste precipitation of the iron blue pigment according to the invention is carried out in two phases, potassium ions being used as alkali ions in the first phase and sodium ions in the second phase. After removal of the reaction salts and addition of potassium salts, the white paste suspension thus obtained is aged and subsequently oxidized to iron blue pigment by known methods. The iron blue pigment can be used as a pigment for the production of printing inks, colored paints, colored varnishes and as coloring agents for fungicides.

    5.
    发明专利
    未知

    公开(公告)号：DE3780279D1

    公开(公告)日：1992-08-13

    申请号：DE3780279

    申请日：1987-09-05

    Applicant: DEGUSSA

    Inventor： REINHARDT HELMUT DR ,  BECKER ADAM ,  KUHLMANN ROBERT ,  NAUROTH PETER

    IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/154 ,  C01B33/157 ,  C01B33/187 ,  C01B33/193 ,  C09C1/30 ,  A61K7/16

    Abstract: Prodn. of pptd. silica with a cleaning, polishing and thickening action in dentifrices is effected by mixing conventionally prepd. pptd. silicas with different particle sizes and densities in the form of a slurry, and processing the slurry by filtration, washing, drying and grinding. Also claimed are pptd. silicas characterised in terms of their physicochemical properties. Pref. silicas used are (A) a thickener-type silica prepd. as described in DE1467019; (B) an abrasive-type silica prepd. as described in DE3114493, example 10; and (C) a silica with a low Fe content prepd. as described in DE 1293138, example 1. Combinations of (A)+(B), (A)+(C) and (B)+(C) may also be used.

    7.
    发明专利
    未知

    公开(公告)号：DE1642769A1

    公开(公告)日：1972-04-13

    申请号：DED0052699

    申请日：1967-04-04

    Applicant: DEGUSSA

    Inventor： BESCHKE HELMUT ,  REINHARDT HELMUT DR ,  ACHENBACH KARL

    IPC: C01B33/193 ,  C12H1/00 ,  C12H1/04

    Abstract: 1,151,476. Polymer coated silica. DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT. 3 April, 1968 [4 April, 1967], No. 15975/68. Heading C1A. [Also in Divisions C3 and C6] Finely divided silica and a vinyl pyrrolidone (including alkyl analogues) polymer are coprecipitated from a silicate solution with an acid. The specified silicate solution is waterglass. The coprecipitant is used to improve the stability of beer.

    IRON-BLUE PIGMENT, PROCESS FOR PREPARING IT AND ITS USE
    9.
    发明专利
    IRON-BLUE PIGMENT, PROCESS FOR PREPARING IT AND ITS USE 未知

    公开(公告)号：DE3162174D1

    公开(公告)日：1984-03-15

    申请号：DE3162174

    申请日：1981-08-11

    Applicant: DEGUSSA

    Inventor： GRATZFELD EVERHARD ,  CLAUSEN EVA ,  REINHARDT HELMUT DR ,  SCHAEFER HANS DR

    IPC: C09D11/00 ,  C01C3/12 ,  C01G49/00 ,  C09C1/00 ,  C09C1/22 ,  C09C1/26 ,  C09D11/02

    Abstract: Iron blue pigment (DIN 55 906) is produced by white paste precipitation and subsequent oxidation of the white paste. Alakli or alkali metal ions i.e. sodium and potassium ions, cyanide or complex iron cyanide ions and iron ions are used as raw materials. The iron blue pigment according to the invention is characterized by a potassium content of 0.5-4.5% by weight, preferably 0.5-2.0% by weight, a sodium content of 0.2-1.0% by weight, an ammonium content of 2.0-4.5% by weight, preferably 3.0-4.5% by weight, a coloring power in accordance with DIN 53 204 and DIN 53 234 of 5-15% above the Vossen Blue 705 Standard and the following color intervals (determined in accordance with DIN 53 204 and DIN 53 234 in conjunction with DIN 6174, in relation to Vossen Blue 705 as standard): DELTA L: -0.7 to -1.5 DELTA a: -0.5 to 1.5 DELTA b: -0.6 to -2.3 DELTA C: +0.5 to 2.0 In order to save potassium ions, the white paste precipitation of the iron blue pigment according to the invention is carried out in two phases, potassium ions being used as alkali ions in the first phase and sodium ions in the second phase. After removal of the reaction salts and addition of ammonium salts, the white paste suspension thus obtained is aged and subsequently oxidized to iron blue pigment by known methods. The iron blue pigment can be used as a pigment for the production of printing inks, colored paints, colored varnishes and as coloring agents for fungicides.

    10.
    发明专利
    未知

    公开(公告)号：DE2447613A1

    公开(公告)日：1976-04-08

    申请号：DE2447613

    申请日：1974-10-05

    Applicant: DEGUSSA

    Inventor： BRANDT BERND ,  NAUROTH PETER ,  PETERS ALBERT ,  REINHARDT HELMUT DR

    IPC: B01F27/93 ,  B01D1/18 ,  C01B33/18 ,  C01B33/193 ,  C01B33/12

    Abstract: 1511720 Silica suspensions DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 26 Sept 1975 [5 Oct 1974] 39504/75 Heading C1A A silica suspension of at least 12% solids is prepared by continuously introducing a silica filter cake and a suspending agent (e.g. dilute aqueous acid) into a vessel with a stirrer, the ratio of vessel diameter to diameter of the widest part of the stirrer being at most 3:1, the ratio of vessel diameter to filling level being at least 1:2, and the vessel containing at least 1À5 kg. of silica suspension per kg. of filter cake input; stirring the suspension with the stirrer having a peripheral speed of 20-30 m./sec., the suspension having a pH of at most 4; and removing suspension from the zone of maximum turbulence.

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