摘要:
A soluble HF/TaF.sub.5 catalyst is prepared in the absence of an organic solvent according to the steps of:(1) contacting tantalum metal with substantially anhydrous liquid HF to form soluble TaF.sub.5, the amount of HF being sufficient to maintain the TaF.sub.5 thus formed as a homogeneous substantially liquid phase catalyst at a temperature ranging from about 0.degree. to 150.degree. C.,(2) contacting the catalyst thus formed with a hydrocarbon feedstock in a hydrocarbon conversion process to form an acid catalyst phase and a hydrocarbon product phase,(3) stripping HF from said catalyst phase with a gas containing molecular hydrogen thereby reducing the mole ratio of HF to TaF.sub.5, and(4) passing the stripped acid catalyst phase from step (3) to the hydrocarbon conversion process, thereby maintaining the mole ratio of HF to TaF.sub.5 within said process at a level between that obtained in step (1) and step (3).
摘要:
Mixed tetrahydropolycyclopentadienes are isomerized in the presence of anhydrous aluminum trichloride to form an additive suitable for use with a high energy missile fuel. The amount of aluminum trichloride present is such that the weight ratio of trichloride to the tetrahydropolydiene is in the range between from about 0.005 to about 0.75. Also the isomerization involves an inert solvent and is at a temperature between from about -20.degree. C to about 25.degree. C. Also anhydrous hydrogen chloride is present to facilitate the isomerization.
摘要:
Hydrocarbon conversion is effected in the presence of a catalyst consisting essentially of graphite having intercalated in the lattice thereof between about 5 and about 75 weight percent of a Lewis acid. The catalyst may additionally have intercalated therein a minor proportion of a Bronsted acid and/or a Group VI-B or Group VIII metal. The catalyst of graphite having the specified components intercalated in its structure is shown to be much more effective in hydrocarbon conversion, e.g., isomerization, than catalysts having said components deposited on the surface of the graphite.