Process for manufacturing triethanolamine and product obtained

Details Process for manufacturing triethanolamine and product obtained Process for manufacturing triethanolamine and product obtained

2005-12-13

2005-12-13

Davis, Brian (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C252S182120, C252S182290

Reexamination Certificate

active

06974883

ABSTRACT:
The present invention relates to a continuous process for the manufacture of triethanolamine (TEA) comprising, in succession: (i) a step of synthesizing the TEA by continuously bringing ammonia into contact with ethylene oxide under conditions allowing the formation of a reaction mixture comprising mono-, di- and triethanolamines, (ii) a step of continuously separating the ammonia that has not reacted from the reaction mixture and (iii) a step of continuously separating the TEA from the mixture resulting from step (ii). The process is characterized in that a specific mixture of alkanolamines, comprising TEA and from 0.5 to 50% by weight of at least one secondary dialkanolamine, is prepared or isolated from the mixture resulting from step (ii), and in that the TEA is separated and isolated with a degree of purity equal to or greater than 99.2% by weight, by a continuous distillation of the specific mixture of alkanolamines. The present invention also relates to a colorless TEA having a high purity, that can be obtained by the process according to the invention and especially has a high resistance to coloration.

REFERENCES:
patent: 3849262 (1974-11-01), Cocuzza
patent: 4673762 (1987-06-01), Paslean et al.
patent: 5292958 (1994-03-01), Claud et al.
patent: 5424482 (1995-06-01), Overgaard et al.
patent: 5545757 (1996-08-01), Hammer et al.
patent: 5693866 (1997-12-01), Roling et al.
patent: 6388137 (2002-05-01), Ruider et al.
patent: A-2 961 718 (1992-11-01), None
patent: 0 004 015 (1979-09-01), None
patent: A-673 920 (1995-09-01), None
patent: A-760 215 (1956-10-01), None
patent: A2-62 005939 (1987-01-01), None
patent: WO-A-00/32553 (2000-06-01), None
Mitsui Toatsu Chem Inc., “High Pure Tri Ethanolamine Preparation Heat Treat Crude Product Absence Oxygen Useful Cosmetic”, Derwent Abstract of Japanese Appln. 62005939 , (Jan. 12, 1987).
J.F. Martin, “Colour Contaminate Inhibit Ethanolamine Compound Amine Prevent Formation Oxygen Contain Compound”, Derwent Abstract of Canadian Appln. 2061718, (Nov. 23, 1992).
The Merck Index, 12thedition, 1996, Merck & Co., Inc., Whitehouse Station, NJ, p. 1647-1648 entry No. 9798.
Thomas I. McMillan, SRI International Report No. 193 of Jan. 1991, “Ethylene oxide derivatives, ” pages 6-11 to 6-17, 6-25 to 6-27, Fig. 6.3 “ethanolamines”.
Harold W. Scheeline, SRI Imternational Report No. 70 of Aug. 1971, “Ethylene Glycols, Glycols Ethers and Ethanolamines, ” pages 145-147, (Fig. 10, 1, ethanolamines ), 149-153.
Ullmann's Encyclopedia of Industrial Chemistry, 5thed., 1988, vol. B3, Unit operations II, Chapter 4: Distillation and rectification, in particular pages 4-46 to 4-49.

Affiliated with

Also associated with

Rating

Process for manufacturing triethanolamine and product obtained does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for manufacturing triethanolamine and product obtained, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing triethanolamine and product obtained will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3515845