METHOD OF REMOVING SULFITE COMPOUNDS FROM WATER-SOLUBLE SULFURIZED TRIARYLPHOSPHINES Russian patent published in 2004 - IPC

Abstract RU 2240324 C2

FIELD: industrial organic synthesis.

SUBSTANCE: invention relates to a method for removal of sulfite compounds from water-soluble sulfurized triarylphosphines, which consists in at least partially removing sulfite compounds when reducing pH of original compound solution to a value below or equal to 4 and maintaining this pH value until weight percentage of sulfite in solution attains value below 100 ppm.

EFFECT: avoided destruction of triarylphosphines when used as catalysts or as catalytic system ligands.

9 cl, 3 ex

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RU 2 240 324 C2

Authors

Auni Larbi

Burattin Paolo

Kokere P'Er

Juzer Mark

Dates

2004-11-20—Published

1999-12-21—Filed