公开(公告)号：US4225718A

公开(公告)日：1980-09-30

申请号：US14385

申请日：1979-02-22

申请人： Donald J. Perettie ,  Norman L. Dean

发明人： Donald J. Perettie ,  Norman L. Dean

IPC分类号： C07D213/61 ,  C07D213/04

CPC分类号： C07D213/61

摘要： Substantially pure 2,3,5,6-tetrachloropyridine is recovered from a mixture of chlorinated pyridines containing initially 2,3,5,6-tetrachloropyridine and other chlorinated pyridines in an improved process which comprises (a) reacting by contacting a first mixture of chlorinated pyridines with chlorine in the presence of a strong Lewis acid catalyst to thereby obtain a second mixture consisting essentially of 2,3,5,6-tetrachloropyridine and pentachloropyridine, and (b) recovering the 2,3,5,6-tetrachloropyridine from said second mixture. The reaction is normally conducted at a temperature of from about 150.degree. C. to about 300.degree. C. by pressurizing chlorine into a molten mixture of the chlorinated pyridines and maintaining such conditions until substantially all of the isomers have been converted to the symmetrical tetrachloropyridine or pentachloropyridine.

摘要翻译： 在改进的方法中，从最初含有2,3,5,6-四氯吡啶和其它氯化吡啶的氯化吡啶的混合物中回收基本上纯的2,3,5,6-四氯吡啶，其包括（a）通过使第 在强路易斯酸催化剂存在下用氯氯化吡啶，由此得到基本上由2,3,5,6-四氯吡啶和五氯吡啶组成的第二混合物，和（b）从2,3,5,6-四氯吡啶中回收2,3,5,6-四氯吡啶 第二个混合物。 反应通常在约150℃至约300℃的温度下进行，通过将氯加压到氯化吡啶的熔融混合物中并保持这种条件直到基本上所有的异构体已经转化为对称的四氯吡啶或 五氯吡啶。

公开(公告)号：US4281135A

公开(公告)日：1981-07-28

申请号：US153793

申请日：1980-05-28

申请人： Donald J. Perettie ,  Norman L. Dean

发明人： Donald J. Perettie ,  Norman L. Dean

IPC分类号： C07D213/61 ,  C07D213/04

CPC分类号： C07D213/61

摘要： Highly chlorinated pyridines are prepared by reacting 2,6-dichloropyridine with chlorine at temperatures of from about 150.degree. to about 300.degree. C. in the presence of an aluminum, iron or silica oxide catalyst and under sufficient pressure to maintain the 2,6-dichloropyridine reactant as a liquid.

摘要翻译： 在铝，铁或二氧化硅催化剂的存在下，在足够的压力下，使2,6-二氯吡啶与氯在约150℃至约300℃的温度下反应制备高度氯化的吡啶， 二氯吡啶反应物作为液体。