首页>
外国专利>
REDUCTION DECHLORINATION OF 1,1,2-TETRAFLUORO-2- CHLOROETHANE
REDUCTION DECHLORINATION OF 1,1,2-TETRAFLUORO-2- CHLOROETHANE
展开▼
机译：1,1,2-四氟-2-氯乙烷的还原脱氯
展开▼
页面导航
摘要
著录项
相似文献
摘要
PURPOSE: To easily obtain 1,1,1,2-tetrafluoroethane in a high conversion ratio by subjecting 1,1,1,2-tetrafluoro-2-chloroethane to reductive dechlorination in a specific solvent at specific temp. by using Zn in the presence of a proton source. ;CONSTITUTION: 1,1,1,2-tetrafluoro-2-chloroethane is subjected to reductive dechlorination for 5 min-20 hr in a polar aprotic solvent such as dimethylformamide in the presence of a proton source such as pyridinium acetate at 250°C under a pressure of 1-200 atm by using finely divided elemental Zn or metal Zn to obtain the objective compd. useful as a solvent, a propellant, especially, a cooling medium. As the above mentioned proton source, an ammonium component represented by formula NR3H+ [wherein R is H, 1-4C alkyl or (substd.)pyridinium] and ammonium carboxylate composed of a carboxylate component of 1-8C alkyl or aryl such as acetate are pref. used.;COPYRIGHT: (C)1990,JPO
展开▼
机译：目的：通过在特定温度下在特定溶剂中对1,1,1,2-四氟-2-氯乙烷进行还原脱氯，以轻松获得高转化率的1,1,1,2-四氟乙烷。通过在质子源存在下使用Zn。 ;组成：在质子源（如乙酸吡啶鎓）存在下，在极性非质子传递溶剂（如二甲基甲酰胺）中于1,25,1,1,2，-四氟-2-氯乙烷进行5分钟至20小时的还原脱氯反应在1-200 atm的压力下，通过使用细分的元素Zn或金属Zn获得目标化合物。推进剂特别是冷却介质可用作溶剂。作为上述质子源，由式NR 3 H + [其中R是H，1-4C烷基或（≤）吡啶]表示的铵组分和铵由1-8C烷基或芳基的羧酸盐组分如乙酸组成的羧酸盐是优选的。 COPYRIGHT：（C）1990，JPO
展开▼
