Method for producing phthalic anhydride that conforms to...

Details Method for producing phthalic anhydride that conforms to... Method for producing phthalic anhydride that conforms to...

2005-12-31

2009-11-17

Oh, Taylor Victor (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C203S086000, C203S089000, C203S091000

Reexamination Certificate

active

07619098

ABSTRACT:
Process for the preparation of on-spec phthalic anhydride by the distillative purification of crude phthalic anhydride at reduced pressure, where the crude phthalic anhydride is passed to the distillation column above a side take-off, the low-boiling components are removed at the top of the column or in the vicinity of the top of the column and the on-spec phthalic anhydride is removed from the side take-off of the column, in which a distillation column is used whose number of theoretical plates located above the supply of the crude phthalic anhydride into the distillation column is 10 to 20 and the column is operated at a reflux ratio of from 0.1 to 0.5.

REFERENCES:
patent: 3699008 (1972-10-01), Brendt et al.
patent: 4008255 (1977-02-01), Wirth et al.
patent: 4547578 (1985-10-01), Gude et al.
patent: 6570026 (2003-05-01), Peschel et al.
patent: 2004/0060809 (2004-04-01), Disteldorf et al.
patent: 1233012 (2002-08-01), None
patent: WO-01/14308 (2001-03-01), None
Durst et al , Experimental Organic Chemistry, 1980, McGraw-Hill, Inc. p. 49. (3 pages).
Suter, H., “Phthalicanydride and its use”, Steinkopff Verlag, 1972, pp. 39-46.
Ullmanns Encyclopedia of Industrial of Chemical Technology, 5th Edition, 1992, vol. A20, pp. 181-189.
Kirk-Othmer Encyclopedia of Chemical Technology, 4th Edition, vol. 18, pp. 997-1006, 1996.
“Phtalsäureanhydrid”, Europa-Chemie, 1695, Issue 21, p. 7, 1965.
Organics, 1975, 14th Edition, pp. 42-44, 50-60.
Vauck, W. R. A. et al., “Basic Operations of Chemical Process Technology”, 2000, Chapter 10.4.2, pp. 710-761.
Kirk-Othmer, Encyclopedia of Chemical Technology, 4th Edition, 1993, vol. 8, pp. 311-358.

Affiliated with

Also associated with

Rating

Method for producing phthalic anhydride that conforms to... 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 phthalic anhydride that conforms to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing phthalic anhydride that conforms to... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4068816