Abstract: A multi-step hydrocarbon conversion process for producing gasoline from propane is disclosed. Propane is passed into a dehydrogenation zone and the entire dehydrogenation zone effluent is then passed into a catalytic condensation zone wherein propylene is converted into C.sub.6 and C.sub.9 hydrocarbons. The condensation zone effluent, a stripper overhead stream and an absorber bottoms stream are commingled and then separated into vapor and liquid portions. The liquid is passed into the stripper, and the vapor portion is contacted with stripper bottoms liquid in an absorber. The absorber overhead stream is contacted with liquid propane in a second absorber to remove C.sub.6 hydrocarbons and is then recycled to the dehydrogenation zone. Depropanizing a portion of the stripper bottoms yields the liquid propane and a gasoline product.

Abstract: A hydrocarbon conversion process for the production of motor fuel blending stocks from butanes is disclosed. The butane feed stream enters a deisobutanizer column. A normal butane-rich stream removed from the deisobutanizer is passed into an isomerization zone, with isomerization zone effluent being returned to the deisobutanizer. An isobutane-rich deisobutanizer overhead stream is passed through a dehydrogenation zone which contains a depropanizer and then into an alkylation zone. The effluent of the alkylation zone is fractionated into a product stream and recycle streams passed into the deisobutanizer and the depropanizer. The utilities cost of operating the process is lowered by integration of the heat exchange required in the process.

Abstract: A feed of mixed butenes is subjected to a combination process comprising skeletal isomerization, disproportionation, and appropriate fractionation to yield separate streams of isobutane, normal butane, and isoamylenes which can be dehydrogenated to isoprene.