(19)
(11) EP 0 828 699 A1

(12)

(43) Date of publication:
18.03.1998 Bulletin 1998/12

(21) Application number: 96913047.0

(22) Date of filing: 22.04.1996
(51) International Patent Classification (IPC): 
C07B 53/ 00( . )
C07C 51/ 493( . )
C07C 67/ 54( . )
 C07B 57/ 00( . )
C07C 57/ 30( . )
C07C 69/ 612( . )
(86) International application number:
PCT/US1996/005624
(87) International publication number:
WO 1996/034842 (07.11.1996 Gazette 1996/49)
(84) Designated Contracting States:
CH DE ES FR GB IT LI

(30) Priority: 05.05.1995 US 19950434360

(71) Applicant: HOECHST CELANESE CORPORATION
Somerville, N.J. 08876 (US)

(72) Inventors:
  • ASLAM, Mohammad
    Corpus Christi, TX 78413 (US)
  • ELANGO, Varadaraj
    Norwood, MA 02062 (US)
  • FRITCH, John, R.
    Corpus Christi, TX 78410 (US)
  • VOLLHEIM, Thomas, G.
    D-60529 Frankfurt (DE)

(74) Representative: von Kreisler, Alek, Dipl.-Chem., et al 
Patentanwälte, von Kreisler-Selting-Werner, Bahnhofsvorplatz 1 (Deichmannhaus)
50667 Köln
50667 Köln (DE)

   


(54) SEPARATION OF ALPHA-ARYLPROPIONIC ACID ESTER DIASTEREOMERS BY DISTILLATION