TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Condition: The disproportionation reaction conditions include the presence of an initiator (greater than 0.01 wt.% based on the combined weight of the hydrocarbon feed and the initiator); a temperature of 24-191 degreesC; an acidic disproportionation catalyst that is suitable for catalyzing a hydrogen reaction between secondary and tertiary carbenium ions; and a contact time of the feed with the catalyst from 30 seconds to 2 hours.The mole ratio of isopentane(s) to the lower paraffin in the hydrocarbon feed is 0.01-80.Preferred Component: The lower paraffin comprises a hydrocarbon comprising propane and n-butane.The initiator comprises:(a) haloalkane comprising fluoropropane, fluorobutanes and fluoropentanes;(b) a branched paraffin comprising a multi-branched paraffin having 4-10C per molecule, or a combination of any two; or(c) olefin(s), where at least one comprises 3-20C olefin and combination of propylene, butylene and pentene.The hydrocarbon feed further comprises water (less than 6 wt.%). The hydrocarbon phase is further separated into an isobutane stream comprising isobutane and a +5C alkylate stream comprising 4C hydrocarbons.    TECHNOLOGY FOCUS - POLYMERS - Preferred Catalyst: The acidic disproportionation catalyst can also be polyfluoroalkane sulfonic acid, where the polyfluoroalkane moiety contains 1-20C. SPECIFIC MATERIALS - The acidic disproportionation catalyst comprises sulfuric acid or hydrofluoric acid (preferably hydrofluoric acid).    EXAMPLE - A feed composition (43.2 g) was disproportionated in a batch reactor in which hydrofluoric acid (HF) (146.9 g), dissolved light hydrocarbons and water were stirred at 1500 rpm. The reactor temperature was 207.7 degreesF, and the volume to volume ratio of HF to hydrocarbon was 2:1. The HF and disproportionation product was drawn off into a sample cylinder, contacted with potassium hydroxide solution to destroy free HF, collected and analyzed by standard chromatography. The separated disproportionation product was collected and analyzed at the end of the run (30 minutes). Test results provided a 69.55 wt.% increase in the iso-5C conversion and an increased iso-4C selectivity of 41.7.