Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1983-09-26
1985-08-27
Rotman, Alan L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
546 5, 546321, C07D21355
Patent
active
045379718
ABSTRACT:
This invention relates to improved processes for the manufacture of quinolinic acid run with a higher concentration of reactants in the initial step wherein quinoline is oxidized with hydrogen peroxide in an aqueous sulfuric acid solution in the presence of copper sulfate to prepare copper quinolinate, and in subsequent steps converting the copper quinolinate from the initial step to quinolinic acid by treating the copper salt with alkali to form the water soluble alkali salt form of quinolinic acid precipitating the copper as insoluble cupric oxide and thereafter treating the soluble alkali salt form with acid to obtain the quinolinic acid, the improvement whereby the reaction of the initial step is carried out in a thermally controllable and safe manner and the formation of by-products is minimized which comprises in the initial step adding separately either in portion-wise multiple and approximately equal portions or adding continuously and simultaneously over a period of time each of the following, the sulfuric acid, the quinoline and the hydrogen peroxide to an aqueous solution of the copper sulfate over such time intervals of sufficient length spaced between each group of portion-wise additions or at such a rate as to allow the hydrogen peroxide to react to maintain an unreacted hydrogen peroxide concentration in the reaction of between approximately three and approximately fifteen percent.
REFERENCES:
patent: 2347410 (1944-04-01), Hawkinson et al.
patent: 2371691 (1945-03-01), Hawkinson et al.
W. Stix and S. Bulgatsch Chemische Berichte 65 11 (1932) [C.A. 26: 2195.sup.1 (1932)] and translation.
Kassner James E.
Rebhahn Robert W. J.
Werner Raymond E.
DuPont Paul E.
Miesle Terrence E.
Rotman Alan L.
The Hilton-Davis Chemical Co.
Wyatt B. Woodrow
LandOfFree
Process for preparing quinolinic 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 preparing quinolinic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing quinolinic acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2002560