Decoloration and color stabilization of TEDA solution

Details Decoloration and color stabilization of TEDA solution Decoloration and color stabilization of TEDA solution

2006-07-11

2006-07-11

Wilson, James O. (Department: 1624)

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

Reexamination Certificate

active

07074926

ABSTRACT:
The present invention relates to a process for preparing TEDA solutions comprising a solvent selected from the group consisting of polyhydric alcohols and ethers of polyhydric alcohols. The process comprises passing gaseous TEDA into the solvent and subsequently treating the solutions with one or more suitable adsorbents. This gives solutions which have only low color numbers and are color-stable on storage. The solutions can be used as such in preferred applications of TEDA, preferably polyurethane production.

REFERENCES:
patent: 3297701 (1967-01-01), Brader, Jr. et al.
patent: 3993651 (1976-11-01), Keating
patent: 4017494 (1977-04-01), Bosche et al.
patent: 4216323 (1980-08-01), Otsuki et al.
patent: 4463320 (1984-07-01), Dawson
patent: 4582904 (1986-04-01), Wells et al.
patent: 4757143 (1988-07-01), Vanderpool et al.
patent: 4804758 (1989-02-01), Hoelderich et al.
patent: 5741906 (1998-04-01), Santiesteban et al.
patent: 6552194 (2003-04-01), Lang et al.
patent: 6627756 (2003-09-01), Riechers et al.
patent: 24 42 929 (1976-03-01), None
patent: 26 11 069 (1976-09-01), None
patent: 28 49 993 (1979-05-01), None
patent: 37 18 395 (1987-12-01), None
patent: 36 34 258 (1988-04-01), None
patent: 111 928 (1984-06-01), None
patent: 382 055 (1990-08-01), None
patent: 831 096 (1998-03-01), None
patent: 842 935 (1998-05-01), None
patent: 842 936 (1998-05-01), None
patent: 952 152 (1999-10-01), None
patent: 1 070717 (2001-01-01), None
patent: 1 223 172 (2002-07-01), None
Hawley's Condensed Chemical Dictionary, 13th ed., revised by Richard J. Lewis, Sr, Van Nostrand Reinhold, p. 960, © 1997.
Derwent JP 049048-609 (Abstract) 1972.

Affiliated with

Also associated with

Rating

Decoloration and color stabilization of TEDA solution does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Decoloration and color stabilization of TEDA solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decoloration and color stabilization of TEDA solution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3529948