C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
C30B 29/40 (2006.01) C01G 28/02 (2006.01) C22B 3/08 (2006.01) C22B 3/24 (2006.01) C22B 3/46 (2006.01) C25C 1/12 (2006.01)
Patent
CA 2634878
The present invention is to provide a process for producing a scorodite that can shorten the time required for synthesizing the scorodite, and further can improve the yield of arsenic and iron into the scorodite. Accordingly, a process for producing a crystalline scorodite from an acidic aqueous solution containing pentavalent As and trivalent Fe, wherein the synthesis of the crystalline scorodite is performed after the molar ratio of trivalent Fe to pentavalent As contained in the acidic aqueous solution is adjusted to be equal to or more than 0.9 and equal to or less than 1.1 is provided.
La présente invention vise à fournir un procédé pour préparer une scorodite, procédé permettant de synthétiser la scorodite rapidement, et améliorant le rendement d'arsenic et de fer dans la scorodite. On présente donc un procédé permettant de produire une scorodite cristalline à partir d'une solution aqueuse acide contenant de l'As pentavalent et du Fe trivalent, procédé selon lequel la synthèse de la scorodite cristalline est effectuée après que le ratio molaire du Fe trivalent à l'as pentavalent a été ajusté pour être égal ou supérieur à 0,9, et égal ou inférieur à 1,1.
Katsura Shigeo
Kimura Yukio
Jx Nippon Mining & Metals Corporation
Marks & Clerk
Nippon Mining & Metals Co. Ltd.
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