VERFAHREN ZUR ABTRENNUNG UND REINDARSTELLUNG VON SALZEN DER DIPHENYLPHOSPHINPHENYL-M-SULFONSAEURE, PHENYLPHOSPHIN-DI(M-PHENYLSULFONSAEURE) UND/ODER TRIPHENYLPHOSPHIN-TRI(M-SULFONSAEURE)

• Main Authors: BEXTEN,LUDGER,.DR, CORNILS,BOY,.DR, KUPIES,DIETER
• Format: Patent
• Language: German
• Published: 13.03.1986
• Edition: 4
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

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 solutions 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.