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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) APPLICATION No:
1262/MAS/1997A
(22) Date of filing of Application:11/06/1997 (43) Publication Date: 09/06/2006
(54) Title of the invention:
A PROCESS FOR PURIFYING E-
CAPROLACTAM
(51)International classification:C07D
201/16.
(31) Priority Document No.196 23 662.2
(32) Priority Date:13/06/1996
(33) Name of priority country:GERMANY
(87) WIPO No. :PCT/EP1997/003098
(61) Patent of addition to
Application No. :
Filed on:
(62) Divisional to
Applcation No.:
Filed on:
(71) Name of Applicant
BASF AG
Address of Applicant:
D-67056 LUDWIGSHAFEN, GERMANY.,
GERMANY
(72) Name of the Inventor(s):
FUCHS, Eberhard.
(57)Abstract
This invention relates to a process for purifying E-caprolactam, which r comprises treating the E-caprolactam to be
purified with a complex borohydride which is selected from the group consisting of NaBH4, LiBH4, KBH4, Ca(BH4)2,
and ~ NaBH3CN and subjecting the reaction mixture to distallation to give SXUH}-caprolactam.
The Patent Office Journal 09/06/2006 10824