crude petroleum — Naphtha Naph tha (n[a^]f th[.a] or n[a^]p th[.a]), n. [L. naphtha, Gr. na fqa, fr.Ar. nafth, nifth.] 1. (Chem.) The complex mixture of volatile, liquid, inflammable hydrocarbons, occurring naturally, and usually called {crude petroleum}, {mineral … The Collaborative International Dictionary of English
Light crude oil — is liquid petroleum that has a low density and flows freely at room temperature.[1] It has a low viscosity, low specific gravity and high API gravity due to the presence of a high proportion of light hydrocarbon fractions.[2] It generally has a… … Wikipedia
Benchmark (crude oil) — Crude oil benchmarks, also known as oil markers, were first introduced in the mid 1980s. There are three primary benchmarks, WTI, Brent Blend, and Dubai. Other well known blends include the Opec basket used by OPEC, Tapis Crude which is traded in … Wikipedia
Heavy crude oil — or Extra Heavy oil is any type of crude oil which does not flow easily. It is referred to as heavy because its density or specific gravity is higher than of light crude oil. Heavy crude oil has been defined as any liquid petroleum with an API… … Wikipedia
petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… … Universalium
Petroleum — For other uses, see Petroleum (disambiguation). Proven world oil reserves, 2009 … Wikipedia
Crack spread — Energy portal Crack spread is a term used in the oil industry and futures trading for the differential between the price of crude oil and petroleum products extracted from it that is, the profit margin that an oil refinery can expect to make by… … Wikipedia
Cracking (chemistry) — In petroleum geology and chemistry, cracking is the process whereby complex organic molecules such as kerogens or heavy hydrocarbons are broken down into simpler molecules such as light hydrocarbons, by the breaking of carbon carbon bonds in the… … Wikipedia
Coking — Thermal refining processes used to produce fuel gas, gasoline blendstocks, distillates, and petroleum coke from the heavier products of atmospheric and vacuum distillation. Includes: Delayed Coking. A process by which heavier crude oil… … Energy terms
Delayed coking — A process by which heavier crude oil fractions can be thermally decomposed under conditions of elevated temperatures and pressure to produce a mixture of lighter oils and petroleum coke. The light oils can be processed further in other refinery … Energy terms
carbon rejection — Crude oil contains a wide variety of hydrocarbon molecules, ranging from a single carbon atom (methane) to very long chain molecules. The lighter molecules that make up gasoline, jet and diesel contain a lower ratio of carbon to hydrogen than the … Petroleum refining glossary