Method for preparing lactam
AssigneeDairen Chemical Corporation
InventorsShien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Cheng-Lin Tsai, Joe-Min Lin
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Abstract
The present invention is related to a method for preparing lactam represented by the following formula: 1 wherein R is C2-10 alkylene which may be optionally substituted with C1-6 alkyl or phenyl; R′ is a hydrogen atom, C1-6, alkyl, C1-6 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.
Claims15
A method for preparing lactam represented by the following formula (I):
- 4
- wherein R is C2-10 alkylene which may be optionally substituted with C1-6 alkyl or phenyl;
- R′ is a hydrogen atom, C1-6 alkyl, C1-6 hydroxyalkyl or phenyl;
- which 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;
- wherein said lactone is represented by the following formula (II):
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- wherein the definition of R has the same meaning as described above;
- wherein said amine is a primary, secondary or tertiary acyclic amine substituted with one to three C1-6 alkyl, C1-6 hydroxyalkyl or phenyl.
A method of claim I, wherein the constraint index of said crystalline aluminosilicate zeolite is 1 to 12.
Dependencies are inferred from the claim text.