公开(公告)号：US3888845A

公开(公告)日：1975-06-10

申请号：US12155071

申请日：1971-03-05

Applicant: TEIJIN LTD

Inventor： FUJITA YUTAKA ,  NARUCHI TATSUYUKI ,  YOSHISATO EISHIN

IPC: B01J23/74 ,  B01J23/86 ,  B01J23/94 ,  C07D201/08 ,  C07D41/06

CPC classification number: B01J23/94 ,  B01J23/74 ,  B01J23/868 ,  C07D201/08 ,  Y02P20/52 ,  Y02P20/582 ,  Y02P20/584

Abstract: Epsilon-caprolactam is prepared without the formation of byproduct ammonium sulfate by contacting at least one of Epsilon caprolactone or a C1-4 lower alkyl ester of Epsilon hydroxycaproic acid, hydrogen and ammonia in the vapor phase at 200* to 320*C. with a solid catalyst comprising (A) at least one oxide selected from titanium dioxide, alumina, aluminasilica and silica, and (B) metallic copper. Optionally the catalyst contains metallic nickel and/or chromium sesquioxide.