公开(公告)号：US4115369A

公开(公告)日：1978-09-19

申请号：US855905

申请日：1977-11-29

申请人： Akitoshi Sugio ,  Tomotaka Furusawa ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Hiroyuki Urabe

发明人： Akitoshi Sugio ,  Tomotaka Furusawa ,  Katsumasa Tanaka ,  Toshikazu Umemura ,  Hiroyuki Urabe

IPC分类号： C08G2/00 ,  B01J19/20 ,  C08G2/10 ,  C08G2/18

CPC分类号： C08G2/18 ,  B01J19/20 ,  C08G2/10

摘要： A process for continuously producing an oxymethylene polymer by continuously polymerizing a starting monomer containing at least 50 mole% of trioxane in bulk in the presence of a catalyst, which comprises feeding the starting monomer into a first-stage polymerization reactor having a self-cleaning action to perform a first-stage polymerization reaction until the conversion reaches 40 to 70%, withdrawing the reaction mixture as a powder from the outlet of the first-stage polymerization reactor, feeding the reaction mixture into a second-stage polymerization reactor having a stirring action to perform a second-stage polymerization reaction until the conversion reaches 95 to 100%, and then withdrawing the polymerization product as a powder from the outlet of the second-stage polymerization reactor.

摘要翻译： 在催化剂存在下，通过连续聚合含有至少50摩尔％的三恶烷的起始单体的方法连续生产甲醛聚合物的方法，其包括将起始单体进料到具有自清洁作用的第一阶段聚合反应器中 进行第一阶段聚合反应，直到转化率达到40〜70％，从第一阶段聚合反应器的出口取出粉末状的反应混合物，将反应混合物进料到具有搅拌作用的第二阶段聚合反应器 进行第二阶段聚合反应，直至转化率达到95〜100％，然后从第二阶段聚合反应器的出口取出作为粉末的聚合产物。