Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
1993-12-28
1996-07-16
Manoharan, Virginia
Distillation: processes, separatory
With chemical reaction
Including step of adding catalyst or reacting material
203 95, 203 96, 203DIG16, 20415771, 546345, B01D 334
Patent
active
055363768
ABSTRACT:
A method for producing 2-chloropyridine and 2,6-dichloropyridine by the steps of mixing vaporized chlorine and vaporized water to obtain dilute chlorine; introducing the dilute chlorine and vaporized pyridine into a reactor; and reacting the vaporized pyridine with the dilute chlorine in a gas phase under ultraviolet rays irradiation. By the method, 2-chloropyridine and 2,6-dichloropyridine can be produced in high yields. The present invention is also directed to a method for separating 2,6-dichloropyridine from a mixture containing 2,6-dichloropyridine, 2-chloropyridine and pyridine by the step of carrying out distillation of the mixture containing 2,6-dichloropyridine, 2-chloropyridine and pyridine in the presence of water while adding sulfuric acid to a distillation column. Highly purified 2,6-dichloropyridine can be separated by the method.
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patent: 5141608 (1992-08-01), Kamei
Hata Hiroyuki
Ogasahara Johji
Shigeta Hiromoto
Tokura Ryoichi
Yamaguchi Shigenobu
Manoharan Virginia
Sumitomo Seika Chemicals Co. Ltd.
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