| abstract |
The present invention is related to a method for preparing lactam represented by the following formula: n n n wherein R is C 2-10 alkylene which may be optionally substituted with C 1-6 alkyl or phenyl; R′ is a hydrogen atom, C 1-6 , alkyl, C 1-6 hydroxyalkyl or phenyl. The method for preparing lactam comprises an amination reaction using crystalline aluminosilicate zeolites as catalysts under the condition of gas phase in the presence of (a) lactone, (b) amine and/or ammonia and (c) water. |