Recovery process

Details Recovery process Recovery process

C - Chemistry, Metallurgy

07

F

260/530.3

C07F 9/50 (2006.01)

Patent

CA 1238920

NOVEL RECOVERY PROCESS ABSTRACT OF THE DISLCOSURE A process for the purification of salts of at least one member of the group consisting of diphenylphosphine-phenyl -m-sulfonic acid, phenylphosphine-di-(m-phenylsulfonic acid) and triphenylphosphine-tri-(m-sulfonic acid) from aqueous solu- tions thereof comprising adding at least a molar equivalent amount of at least one member of the group consisting of di-(n- pentyl)-amine, di-(n-hexyl)-amine and water-soluble salts of said amines to an aqueous solution containing at least one member of the group consisting diphenylphosphine-phenyl-m-sulfonic acid, phenylphosphine-di-(m-phenylsulfonic acid), triphenylphosphine- tri(m-sulfonic acid)and salts thereof to adjust the pH value to ?7, recovering the precipitate, washing the precipitate and dissolving the same in an aqueous basic solution. -A-

489574

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