Method for preparing lactam
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United States of America Patent
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Jul 17, 2001
Grant Date -
N/A
app pub date -
Oct 28, 1999
filing date -
Jan 27, 1995
priority date (Note) -
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Abstract
The present invention includes a process for the preparation of a lactam by vapor phase reaction of an aliphatic aminonitrile with water in the presence of a solid catalyst, wherein the catalyst is an alumina having a specific surface, measured by the BET method, greater than or equal to 10 m.sup.2 /g. The alumina catalyst is further characterized by either: (a) a specific surface less than or equal to 280 m.sup.2 /g, and a volume of pores with a diameter greater than 500 .ANG. which is greater than or equal to 10 ml/100 g; or (b) a specific surface greater than or equal to 50 m.sup.2 /g and less than or equal to 280 m.sup.2 /g, and a volume of pores with a diameter greater than 70 .ANG. which is greater than or equal to 30 m.sup.2 /g.
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