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