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- W40744581 abstract "The formation of gum in gasoline or in pure alkanes and alkenes was accelerated by irradiation with UV light. A vacuum transfer technique was developed for recovery of gum from the liquids. Infrared analysis of the gum indicated the presence of carboxyl, hydroxyl, carbonyl, and ester functional groups. Vacuum distillation of the gum followed by functional group and elemental analyses of the distillate, residue, and original gum did not reveal any major differences between them. A three-step gum reduction process was developed in which the gum was reduced with lithium aluminum hydride, converted to iodo-compounds with potassium iodide, and the iodo-compounds reduced with zinc and hydrogen chloride. Infrared analysis of the reduced gum showed that oxygenated groups had been eliminated, indicating that the gum had been reduced essentially to hydrocarbons. The reduced gum appeared to be highly aromatic. Several oxygen and nitrogen containing compounds were added to a synthetic system of 2-heptene and isooctane or to gasoline to determine their gum-forming potential during irradiation with UV light or in storage. The gums were studied by first reducing them to hydrocarbons, then analyzing the hydrocarbons by such techniques as fractional distillation, gas-liquid chromatography, UV absorption, and mass spectroscopy. Compounds identified inmore » the fraction of reduced gum boiling up to 188/sup 0/C were almost solely aromatic in nature, representing alkylbenzenes, indane, indene, and styrene. The higher boiling material was composed largely of naphthalenes, acenaphthenes, indanes, and indenes.« less" @default.
- W40744581 created "2016-06-24" @default.
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- W40744581 date "1958-01-01" @default.
- W40744581 modified "2023-09-26" @default.
- W40744581 title "Gum and haze formation in motor gasoline" @default.
- W40744581 hasPublicationYear "1958" @default.
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