دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

describing members of a family of chemicals with a ring structure of carbon chains. Normally xylene, toluene, etc. Benzene is a aromatic but is not used.

benzene, toluene, xylene.

n: a process of petroleum refining in which straight-run, cracked, or mixed naphthas are passed over a solid catalyst at elevated temperatures and moderate pressures in the presence of added hydrogen or hydrogen-containing gases. The main chemical reactions are dehydrogenation and aromatization of the nonaromatic constituents of the naphtha to form either high-octane motor fuel or highgrade aviation gasoline high in aromatic hydrocarbons such as toluene and xylenes. Ninety percent of die sulphur contained in the naphtha is removed.

a substance that will dissolve a solid. In the oil field, oil based solvents may range from xylene for asphaltenes and sludges, to kerosene and diesel/xylene mixtures for paraffins.

n: any of three flammable hydrocarbons, C6H4(CH3h, similar to benzene. A commercial mixture is used as a solvent when oilfield emulsions are being tested.