Preparation of sulfonated triarylphosphines

Details Preparation of sulfonated triarylphosphines Preparation of sulfonated triarylphosphines

1983-08-30

1984-11-20

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260505R, C07C14324

Patent

active

044838018

ABSTRACT:
Sulfonated triarylphosphines well suited for catalysis are facilely prepared by (i) sulfonating the aromatic moieties of a corresponding triarylphosphine starting material with an H.sub.2 SO.sub.4 /SO.sub.3 mixture; (ii) hydrolyzing the sulfonation reaction mixture to terminate said sulfonation reaction when same has attained the desired degree of sulfonation, thereby producing a hydrolysate rich in sulfuric acid and which comprises the product sulfonated triarylphosphine; (iii) next liquid/liquid extracting said hydrolysate with an organic phase comprising at least one phosphoric or diphosphoric, phosphonic or diphosphonic, phosphinic or diphosphinic ester, or phosphine oxide or diphosphine dioxide, or slightly water miscible or immiscible C.sub.4 -C.sub.12 alcohol, or sulfoxide extractant, whereby the sulfonated triarylphosphine is extracted into said organic phase, (iv) separating the organic phase from the aqueous raffinate; (v) regenerating said organic phase with water or with an aqueous solution; and (vi) recovering an aqueous solution of said sulfonated triarylphosphine.

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