دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: hydrocarbons derived from or containing a benzene ring. Many have an odour. Singlering aromatic hydrocarbons are the benzene series (benzene, ethylbenzenes, and toluene). Aromatic hydrocarbons also include naphthalene and anthracene. Compare aliphatic hydrocarbons.

n: the hydrocarbon liquid lighter than kerosene that can be recovered by catalytic or thermal cracking in a refinery.

n: a part of a mixture of hydrocarbons, usually defined by boiling range--for example, naphtha. gas oil, or kerosene.

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.

n: a combination of straightrun and cracked naphtha.

n: a volatile, flammable liquid hydrocarbon distilled from petroleum and used as a solvent or a fuel.

an aromatic solvent with highly-variable quality. Often has a described carbon range in the C7 to C10 area.

Oil with API gravity of less than 25.

a common diverter. It can sublime, or go directly from a solid to a gas.

Naphtha.