Distillation: processes – separatory – With disparate physical separation – Utilizing liquid-liquid extracting of distillation product
Reexamination Certificate
2006-11-17
2011-11-15
Manoharan, Virginia (Department: 1771)
Distillation: processes, separatory
With disparate physical separation
Utilizing liquid-liquid extracting of distillation product
C203S060000, C203S098000, C546S246000, C546S353000
Reexamination Certificate
active
08057643
ABSTRACT:
A process recovers of pyridine and/or its derivatives from their aqueous mass and/or manufacturing reaction mass by liquid-liquid extraction employing an alkyl acetate. The process further involves effective recovering and recycling of solvents from the aqueous phase and other waste obtained during the process.
REFERENCES:
patent: 2058435 (1936-10-01), Fisher et al.
patent: 4237300 (1980-12-01), Bochis et al.
patent: 4364869 (1982-12-01), Muller et al.
patent: 4404388 (1983-09-01), Fah et al.
patent: 5100514 (1992-03-01), Berg et al.
patent: 5208342 (1993-05-01), Gupton et al.
patent: 5364941 (1994-11-01), Yamakawa et al.
patent: 6087507 (2000-07-01), Laitinen et al.
patent: 6133449 (2000-10-01), Brightwell et al.
patent: 6346623 (2002-02-01), Steinbauer et al.
patent: 6939972 (2005-09-01), Kumar et al.
patent: 7348435 (2008-03-01), Kaushik et al.
patent: 0 261 549 (1988-03-01), None
patent: 0 573 954 (1993-12-01), None
patent: 7 215939 (1995-08-01), None
Vladimir N. Bulavka, et al., “Synthesis of 4-aminopyridine and 4-acetylaminopyridine by reduction of 4-nitropyridine-N-oxide with iron and mineral acids”, Fourth International Electronic Conference on Synthetic Organic Chemistry, XP-002440537, http://pages.unibas.ch/mdpi/ecsoc-4/a0082/a0082.htm, 2000.
Agarwal Ashutosh
Dixit Sanjeev Kumar
Kumar Mahendra
Singh Shailendra Kumar
Jubilant Organosys Limited
Manoharan Virginia
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
LandOfFree
Eco-friendly process for recovery of pyridine and/or its... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Eco-friendly process for recovery of pyridine and/or its..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eco-friendly process for recovery of pyridine and/or its... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4280857