| 摘要 |
The durability and selectivity of a supported nobel metal hydrodechlorination catalyst can be improved by treating the supported catalyst, which comprises support and catalytic noble metal, with a halide salt (such as a late transition metal halide salt, a post transition metal containing halide salt, or a combination thereof), together with the use of an alkali metal halide, ammonium halide, or a combination thereof. Suitable late transition metal and post transition metal halides for use herein include zinc chloride, tin chloride, and cupric chloride. A suitable alkali metal halide for use herein includes lithium chloride. The novel resulting supported catalyst has its noble metal component, which is in the zero valent state, predominantly residing adjacent, the surface of the support in a form which is predominantly visible under a microscope having a resolution of about 5 ANGSTROM . The catalyst also comprises the late transition metal, the post transition metal or combination thereof, optionally in the presence of the alkali metal moiety, ammonium moiety, or combination thereof.
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