Agent for promoting filtration dehydration of metal...

Details Agent for promoting filtration dehydration of metal... Agent for promoting filtration dehydration of metal...

C - Chemistry, Metallurgy

07

C

260/527, 134/56,

C07C 59/125 (2006.01) B01D 37/03 (2006.01) C01F 7/14 (2006.01) C07F 9/09 (2006.01)

Patent

CA 1148168

ABSTRACT OF THE DISCLOSURE An agueous slurry of a water-insoluble or slightly water-soluble metal hydroxide can be effectively filtrated and dehydrated by the addition of a novel anionic surfactant of the following formula (1): Image (I) wherein R represents an alkyl or alkenyl group of 8-24 carbon atoms, A represents an alkylene group of 2-4 carbon atoms, X represents SO3M (M being H, K, Na or NH4), PO3M (M being K or Na) or CH2COOM (M being X or Na), and n represents an integer of 1-100 to the agueous slurry of the metal hydroxide or to the washing water. The water content of the metal hydroxide is efficiently reduced by this technique.

390277

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