دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a process for manufacturing components for 100-octane gasoline. An alkyl group is introduced into an organic compound either with or without a catalyst. Now usually used to mean alkylation of isobutane with propene, butenes, or hexenes in d1e presence of concentrated sulphuric acid or anhydrous hydrofluoric acid.

a reverse cracking process that convents hydrocarbon light ends (olefins) into longer chain, liquid fuels.

n: 1. the breaking down of low temperatures and pressures.2. a motor gasoline refining process in which heavy hydrocarbon components are broken down into light hydrocarbon components using catalysts and relatively low temperatures and pressures. It produces a gasoline that has a higher octane rating and a lower sulphur content than that produced by thermal cracking.

cracking of a metal under combined action of tensile stress and corrosion in the presence of chlorides and an electrolyte (NACE). Starts at a pit, scratch or notch. Crack proceeds primarily along grain boundaries. The cracking process is accelerated by ch

n: 1. a solid cellular residue produced from the dry distillation of certain carbonceous materials that contains carbon as its principal constituent 2. a residue of heavier hydrocarbons formed by thermal cracking and distillation and deposited in the reservoir during in situ combustion. This residue catches fire and becomes the fuel for continued combustion.

a generally insoluble hydrocarbon that has been oxidized to the point of a solid, often hard mass.

n: The stress corrosion of metal. Produced by the affect of strees and corrosive media.

fatigue-type cracking of metal caused by repeated stresses in a corrosive environment.

n: hydrocarbon gases formed in the catalytic cracking process.

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

n: the process of breaking down large chemical compounds into smaller compounds under the influence of heat or catalysts. In petroleum refining, the two major types of cracking are thermal cracking and

breaking longer chain hydrocarbon molecules to shorter chain molecules.