C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 22/14 (2006.01) C01B 17/90 (2006.01) C01G 23/053 (2006.01) C01G 49/14 (2006.01) C04B 28/02 (2006.01)
Patent
CA 2531218
The invention relates to a reducing agent for the soluble chromate content of cement and to methods for the production thereof, which comprise concentrating an used sulfuric acid, containing iron(II) sulfate, and separating the sulfuric acid from the obtained precipitate which contains iron(II) sulfate.
L'invention concerne un agent de réduction destiné aux chromates solubles présents dans du ciment. Elle concerne également des procédés de production dudit agent de réduction, consistant à concentrer un acide sulfurique utilisé, qui contient du sulfate de fer (II), et à séparer l'acide sulfurique du précipité obtenu contenant le sulfate de fer (II).
Auer Gerhard
Bahl Werner
Klein Detlef
Koellisch Klaus
Laubach Benno
Kerr-Mcgee Pigments Gmbh
Kirby Eades Gale Baker
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