Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2006-09-05
2006-09-05
Page, Thurman K. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S478000
Reexamination Certificate
active
07102034
ABSTRACT:
A process for preparing sulfonated arylphosphines by reaction of arylphosphines with oleum, wherein, after reaction of the arylphosphines with oleum, the sulfonation mixture is firstly diluted with water, an inert gas stream is then passed through the diluted sulfonation mixture until SO2is no longer liberated from the diluted sulfonation mixture and the latter is then worked up further in a customary manner and its use.
REFERENCES:
patent: 4248802 (1981-02-01), Kuntz
Bahrmann Helmut
Bergrath Klaus
Bohnen Hans
Eckl Robert
Fenske Wilfried
Celanese Chemicals Europe GmbH
Muserlian Charles A.
Page Thurman K.
Puttlitz Karl
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