C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
6/210
C09C 1/24 (2006.01) C01G 49/02 (2006.01) C01G 49/06 (2006.01)
Patent
CA 2011838
A PROCESS FOR THE PRODUCTION OF IRON OXIDE YELLOW PIGMENTS Abstract of the Disclosure Low-silking iron oxide yellow pigments having improved color qualities are produced by a novel method which utilizes both precipitation process and the Penniman process. Pigments are nucleated and grown by precipitation to achieve multiplication factor of 2.5 to 7 and additional pigment growth is carried out by the Penniman process. Le A 26 475
Biermann Hans-Peter
Hofs Hans-Ulrich
Krockert Bernd
Printzen Helmut
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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