Patent ID: 6031141
Filing Date: 2000-02-29
Classification: B01J,C07C,Y02P

Abstract:
A process for the manufacture of a fluoroolefin of the formula (R.sup.1).sub.2 C.dbd.C(R.sup.1).sub.2 wherein each R.sup.1 is independently selected from the group consisting of --H, --F, --CF.sub.3, --CHF.sub.2, --CH.sub.2 F, --C.sub.2 F.sub.5, --C.sub.2 HF.sub.4 and --C.sub.2 H.sub.2 F.sub.3, provided that at least one R.sup.1 is not --H, comprising:contacting a hydrofluorocarbon of the formula (R.sup.1).sub.2 CHCF(R.sup.1).sub.2 with a catalyst at temperature of from about 200.degree. C. to about 500.degree. C., said catalyst comprising cubic chromium trifluoride having the following X-ray diffraction powder pattern. Relative d spacing (.ANG.) intensty H K L  5.8888 VS 1 1 1 3.0674 S 3 1 1 2.9432 M 2 2 2 2.0818 W 4 2 2 1.9547 W 5 1 1 1.7991 M7 4 4 0.