Process for removing and recovering precipitation agents...

Details Process for removing and recovering precipitation agents... Process for removing and recovering precipitation agents...

C - Chemistry, Metallurgy

11

D

134/39

C11D 9/40 (2006.01) A23J 1/00 (2006.01) C02F 1/52 (2006.01)

Patent

CA 1054896

ABSTRACT This invention relates to a process for removing and recovering a precipitation agent, such as lignin sulphonic acids, from a precipitated material containing protein. Known techniques for recovering protein from effluents such as slaughterhouse process water result in a protein recovery which is relatively high in precipitation agent content. Protein recovery according to this invention is upgraded by adding sufficient alkaline earth compounds, for example calcium chloride, to the precipitate so as to be able to form an alkali metal proteinate and where necessary, sufficient alkali hydroxide such as sodium hydroxide to neutralize same. The mixture is then heated to coagulate the proteinate so formed and to recover the hydrous precipitation agent so produced. The recovered precipitation may then be advantageously again used as a precipitation agent.

232085

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