公开(公告)号：EP0741706A4

公开(公告)日：1997-04-09

申请号：EP95907461

申请日：1995-01-18

申请人： OLIN CORP

发明人： HANI RAHIM ,  DUMAS RICHARD H ,  GAVIN DAVID F ,  HARRISON CHARLES H ,  KENNEDY MICHAEL A ,  SCHIESSL HENRY W ,  MCMAHON ROBERT E ,  MANKE STEVEN A

IPC分类号： C07D213/61

CPC分类号： C07D213/61

摘要： The present invention relates to a process for preparing 2,6-dichloropyridine which comprises reacting an organic solvent-free, catalyst-free reaction mixture comprising 2-chloropyridine and chlorine in the presence of a hydrogen chloride scavenger and ultraviolet light, and optionally in the presence of added moisture, at a temperature of between about 90 °C and about 185 °C. Also claimed is a method for preventing calcium chloride plugging of the chlorine feed stream and for preventing calcium chloride build-up in the above reaction mixture which comprises adding moisture in the form of water or steam, or a combination thereof, to the reaction mixture prior to, or during, the reaction of said process.

摘要翻译： 本发明涉及一种制备2,6-二氯吡啶的方法，该方法包括在氯化氢清除剂和紫外光的存在下，使包含2-氯吡啶和氯的无有机溶剂的无催化剂的反应混合物和任选地在 在约90℃至约185℃的温度下，存在加入的水分。还要求保护氯原料流中氯化钙堵塞和防止氯化钙在上述反应混合物中积聚的方法， 包括在所述方法的反应之前或期间将水或水蒸汽或其组合的形式加入反应混合物中。