Catalyst rhodium/alumina

Hydrogenation, of gallic add with rhodium-alumina catalyst, 43, 62 of resorcinol to dihydroresorcinol, 41,56 Hydrogen peroxide, and formic acid, with indene, 41, 53 in oxidation of benzoic add to peroxy-benzoic add, 43, 93 in oxidation of ieri-butyl alcohol to a,a/r, a -tetramcthyltetra-methylene glycol, 40, 90 in oxidation of teri-butylamine to a,<, a, a -tetramethyltetra-methylenediamine, 40, 92 in oxidation of Crystal Violet, 41, 2, 3—4... 

Although hydrogenation of pyrrole over a rhodium/alumina catalyst gives some 1-pyrroline (Scheme 6.18a), a better method is to dehydro-halogenate A-chloropyrrolidine by heating it with alcoholic potassium hydroxide (Scheme 6.18b). 2,5-Dihydro-1//-pyrrole, containing 15% pyrrolidine, is obtained by the zinc/hydrochloric acid reduction of pyrrole. 

Rhodium-alumina catalysts with only 0.002 wt % Rh had a good activity for converting NO to nitrogen using simulated exhaust but inadequate oxidation activity. The latter situation can be improved by the addition of Pt or Pd, which have a well known ability for CO and hydrocarbon oxidation. However, more ammonia was formed under reducing conditions using R-Rh or Pd-Rh and also the delicate balance of reactions (CO + NO, CO + H2, etc.), which determines NO removal on the lean-side of the stoicheiometric point (i.e., excess of oxygen), was upset. Deposition of Pt... 

Product Distributions from the Reaction of PropyUne with Deuterium over Rhodium-Alumina Catalysts (61)... 

This trend is consistent with the work of Oh, Fisher, et.al. [12], who showed that as they went from a low dispersion, single crystal catalyst to a highly dispersed rhodium/alumina catalyst, the activation energy increased from 30 to 45 kcal/mole. 

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