Process for recovery of pyridine-2,3-dicarboxylic acid

Details Process for recovery of pyridine-2,3-dicarboxylic acid Process for recovery of pyridine-2,3-dicarboxylic acid

1999-04-02

2000-10-17

Fan, Jane

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21330

Patent

active

061334502

ABSTRACT:
Process for recovering a pyridine-2,3-dicarboxylic acid from a process stream in the preparation process of the pyridine-2,3-dicarboxylic acid in which the process stream is subjected to nanofiltration at a pH higher than 4.5 and the pyridine-2,3-dicarboxylic acid-containing concentrate is utilised. Preferably, the pH is chosen to be between 7 and 9 and the concentration factor in nanofiltration greater than 3.
In a suitable embodiment the process stream is formed by the mother liquor obtained in the preparation of pyridine-2,3-dicarboxylic acid by oxidising a suitable quinoline or the corresponding 2,3-lutidine and separating the solid material.

REFERENCES:
patent: 4537971 (1985-08-01), Rebhahn et al.
patent: 5635071 (1997-06-01), Al-Samadi

Affiliated with

Also associated with

Rating

Process for recovery of pyridine-2,3-dicarboxylic acid 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 recovery of pyridine-2,3-dicarboxylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovery of pyridine-2,3-dicarboxylic acid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-470591