Preparation of xylylenediamine (XDA)

Details Preparation of xylylenediamine (XDA) Preparation of xylylenediamine (XDA)

2008-01-29

2008-01-29

Barts, Samuel (Department: 1621)

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

Organic compounds

Amino nitrogen containing

Reexamination Certificate

active

10571615

ABSTRACT:
A process for preparing xylylenediamine, comprising the steps ofammoxidizing xylene to phthalonitrile by contacting the vaporous product of this ammoxidation stage directly with a liquid organic solvent (quench),removing products having a boiling point higher than phthalonitrile (high boilers) from the resulting quench solution or suspension andhydrogenating the phthalonitrile,wherein the organic solvent used for the quench is N-methyl-2-pyrrolidone (NMP), after the removal of the high boilers and before the hydrogenation, there is a partial or complete removal of the NMP and/or of products having a boiling point lower than phthalonitrile (low boilers) andthe phthalonitrile for the hydrogenation step is dissolved or suspended in an organic solvent or in liquid ammon.

REFERENCES:
patent: 2002/0038054 (2002-03-01), Hurley et al.
patent: 2003/0013917 (2003-01-01), Nakamura et al.
patent: 2041360 (1971-02-01), None
patent: 1193244 (2002-04-01), None
patent: 1279661 (2003-01-01), None
patent: 1306449 (1973-02-01), None
patent: WO-2005028417 (2005-03-01), None

Affiliated with

Also associated with

Rating

Preparation of xylylenediamine (XDA) does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of xylylenediamine (XDA), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of xylylenediamine (XDA) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3916051