摘要
阐述了近年来气相氟化法合成二氟甲烷所用的氟化催化刑,以及实际生产的工艺流程、工艺条件。在常用的氟化催化剂中,无载体的本体铬基催化剂制备简单,但副反应比较明显,因此通常采用负载型催化剂,载体主要是铝基和镁基。在催化剂中加入一定的金属助剂,可提高催化剂的活性,延长催化剂的寿命。
A fluorination catalyst for methylene fluoride production by gaseous phase fluorination,and its practical process areintrouduced.Among the usual fluorination catalysts,it is common to use load catalyst,the carrier mainly consists of aluminium andmagnesium.Otherwise,adding some amount of metallic aids to the catalyst can improve its reactivity and prolong life of the catalyst.
出处
《化工生产与技术》
CAS
2004年第6期7-10,共4页
Chemical Production and Technology