Method for producing electronic grade...

Details Method for producing electronic grade... Method for producing electronic grade...

2007-09-21

2010-11-02

Davis, Brian J (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S477000, C564S479000, C564S480000, C564S497000

Reexamination Certificate

active

07825281

ABSTRACT:
A process for preparing electronics-grade 2,2′-aminoethyoxyethanol by reacting diethylene glycol with ammonia in the presence of a catalyst in a reactor to give a reaction mixture from which a crude 2,2′-aminoethoxyethanol stream is separated off and is purified further by distillation in a pure column, wherein a sidestream comprising electronics-grade 2,2′-aminoethoxyethanol is taken off from the pure column as a result of the diethylene glycol being passed through a filter which ensures a degree of removal of at least 99% for solid particles having a maximum particle size of ≦1.5 μm before the diethylene glycol is fed into the reactor, is proposed.

REFERENCES:
patent: 5288911 (1994-02-01), Koppenhoefer et al.
patent: 7183438 (2007-02-01), Gerlach et al.
patent: 2008/0255351 (2008-10-01), Hoffer et al.
patent: 0510382 (1992-10-01), None
patent: WO-03/076386 (2003-09-01), None
patent: WO-2007/036496 (2007-04-01), None
patent: WO 2008/037587 (2008-04-01), None
patent: WO 2008/037589 (2008-04-01), None
patent: WO 2008/037590 (2008-04-01), None
Database CAPLUS on STN, Acc. No. 1977:75586, Koliushko et al., Gazovaya Promyshlennost (1976), 8, p. 25-27 (abstract).

Affiliated with

Also associated with

Rating

Method for producing electronic grade... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for producing electronic grade..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing electronic grade... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4209574