Appeal No. 1996-3367 Page 2
Application No. 08/480,554
Appellants' invention is directed to a method of reacting
ethylene and chlorine in the presence of a specified catalyst
to
form 1,2-dichloroethane. An understanding of the invention
can be derived from a reading of exemplary claim 1, which is
reproduced below.
1. A process for preparing 1,2-dichloroethane by reaction
of ethylene with chlorine in the presence of a sodium
chloride-iron(III) chloride catalyst, which comprises
maintaining the molar ratio of sodium chloride to iron(III)
chloride from 0.3 to below 0.5 during the whole reaction.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Berkowitz et al. (Berkowitz) 3,496,243 Feb.
17, 1970
Di Fiore et al. (Di Fiore) 3,911,036 Oct. 07,
1975
Böttger et al. (Böttger) DE 4103281 Aug. 06,
1992
(German Offenlegungsschrift)
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