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US 4,054,499 AGranted
Process for producing 2-chloropyridine
AssigneeSeitetsu Kagaku Co., Ltd.
InventorsMasao Kawamura, Tadaaki Nishi, Hiro Tsuchiya, Syuzi Takagi
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Abstract
Pyridine is reacted with chlorine at a molar ratio of pyridine to chlorine of 0.5-10 : 1 in a gaseous phase in the presence of at least 0.2 moles, preferably 1 to 20 moles of steam per mole of pyridine under irradiation of ultraviolet rays of 2000-5000 A, thereby producing 2-chloropyridine.
Claims7
A process for producing 2-chloropyridine by reaction of pyridine with chlorine in a molar ratio of pyridine to chlorine of 0.5:1 - 10:1 under irradiation of photolytic light of 2,000 to 5,000 A in the gaseous phase, which comprises:
- A. feeding and evaporating pyridine to provide gaseous pyridine in a reactor having therein a light source lamp means provided with a light source cooling means;
- B. feeding and evaporating 2 to 15 moles of water per mole of pyridine to provide steam in said reactor;
- C. feeding chlorine to said reactor;
- and
- D. providing photolytic light of 2,000 to 5,000 A from said light source lamp to thereby effect photolytic reaction in the gaseous phase to provide said 2-chloropyridine, and wherein said light source lamp is cooled by means of said light source cooling means.
2 more elements
Dependencies are inferred from the claim text.