Preparation of UV grade synthetic pyridine

Details Preparation of UV grade synthetic pyridine Preparation of UV grade synthetic pyridine

1988-04-27

1989-11-28

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546250, C07D21302, C07D213127

Patent

active

048838810

ABSTRACT:
A method of preparing UV-grade synthetic pyridine from a pyridine-containing reaction product mixture which also contains at least one other compound which is UV absorbing to a sufficient extent that said pyridine mixture is not UV grade, said mixture being obtained from the condensation reaction, over an effective catalyst, of one of more aldehydes and/or ketones with one or more amines and/or ammonia, comprises recovering from said mixture a pyridine-water azeotrope effective to separate pyridine therefrom sufficiently free of UV-absorbing compounds to be UV grade.

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Riddick, J. A. and Bunger, W. B. and Sakano, T. K.; "Physical Properties and Methods of Purification--Organic Solvents", Techniques of Chemistry; vol. 11, 4th Edition, pp. 1076-1079.
Harmsen, L. W. F., Removal of Nitrogen Compounds From Waste Water; CA vol. 108, No. 06, Sec. 160, Abstract No. 043304.

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