Method of purifying hydroxyalkyl amide

Details Method of purifying hydroxyalkyl amide Method of purifying hydroxyalkyl amide

2007-12-25

2007-12-25

Carr, Deborah D. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Fatty compounds having an acid moiety which contains the...

C554S070000

Reexamination Certificate

active

10712830

ABSTRACT:
A method for purifying hydroxyalkyl amide of residual alkanolamine by using nonpolar solvent, an acidic pH, salt solutions and an elevated temperature.

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patent: 4208293 (1980-06-01), Zaweski
patent: 4729769 (1988-03-01), Schlicht et al.
patent: 4960530 (1990-10-01), Everett et al.
patent: 5523431 (1996-06-01), Sköld
patent: 6034257 (2000-03-01), Oftring et al.
patent: 2252555 (1992-08-01), None
patent: WO 96/40619 (1996-12-01), None

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