(JP9501867-W)      A catalyst comprises (i) an acidic solid prod. obtd. by modifying a Gp. IVB metal oxide with an oxyanion of a Gp.VIB metal and (ii) a hydrogenation/dehydrogenation component deposited on the solid prod. Prodn. of the catalyst comprises: (a) contacting the hydroxide or hydrated oxide of a Gp.IVB metal with an aq. soln. of a source of oxyanion and (b) depositing a hydrogenation/dehydrogenation component of the obtd. solid prod. A process for isomerising a 4-8C paraffin feed involves contacting the feed with the above catalyst.    USE -   Catalyst is useful in a 4-8C paraffin isomerisation esp. to higher octane gasoline blending components.    ADVANTAGE -   Maintains high activity over time with high 5+C yield and selectivity esp. to high-octane dimethyl butanes.    (US5719097-A)      A catalyst comprises (i) an acidic solid prod. obtd. by modifying a Gp. IVB metal oxide with an oxyanion of a Gp.VIB metal and (ii) a hydrogenation/dehydrogenation component deposited on the solid prod. Prodn. of the catalyst comprises: (a) contacting the hydroxide or hydrated oxide of a Gp.IVB metal with an aq. soln. of a source of oxyanion and (b) depositing a hydrogenation/dehydrogenation component of the obtd. solid prod. A process for isomerising a 4-8C paraffin feed involves contacting the feed with the above catalyst.    USE -   Catalyst is useful in a 4-8C paraffin isomerisation esp. to higher octane gasoline blending components.    ADVANTAGE -   Maintains high activity over time with high 5+C yield and selectivity esp. to high-octane dimethyl butanes.    (EP710152-B1)      A catalyst comprises (i) an acidic solid prod. obtd. by modifying a Gp. IVB metal oxide with an oxyanion of a Gp.VIB metal and (ii) a hydrogenation/dehydrogenation component deposited on the solid prod. Prodn. of the catalyst comprises: (a) contacting the hydroxide or hydrated oxide of a Gp.IVB metal with an aq. soln. of a source of oxyanion and (b) depositing a hydrogenation/dehydrogenation component of the obtd. solid prod. A process for isomerising a 4-8C paraffin feed involves contacting the feed with the above catalyst.    USE -   Catalyst is useful in a 4-8C paraffin isomerisation esp. to higher octane gasoline blending components.    ADVANTAGE -   Maintains high activity over time with high 5+C yield and selectivity esp. to high-octane dimethyl butanes.