Refining

The process of converting crude oil into a more valuable commodity.

Refining

Refining (also perhaps called by the mathematical term affining) is the process of purification of a (1) substance or a (2) form. The term is usually used of a natural resource that is almost in a usable form, but which is more useful in its pure form. For instance, most types of natural petroleum will burn straight from the ground, but it will bu...
Found on http://en.wikipedia.org/wiki/Refining

Refining

• (p. pr. & vb. n.) of Refine
Found on http://thinkexist.com/dictionary/meaning/refining/

refining

(from the article `metallurgy`) Extraction is often followed by refining, in which the level of impurities is brought lower or controlled by pyrometallurgical, electrolytic, or ... Refining is the final procedure for removing (and often recovering as by-products) the last small amounts of impurities left after the major ... The nongl...
Found on http://www.britannica.com/eb/a-z/r/25

refining

refinement noun the process of removing impurities (as from oil or metals or sugar etc.)
Found on https://www.encyclo.co.uk/local/20974

Refining

[metallurgy] Refining (as in non-metallurgical uses) consists of purifying an impure material, in this case a metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the ori...
Found on http://en.wikipedia.org/wiki/Refining_(metallurgy)

Refining

A series of processes for converting crude oil and its fractions to finished petroleum products. Following distillation, a petroleum fraction may undergo one or more additional steps to purify or modify it. These refining steps include; thermal cracking, catalytic cracking, polymerization, alkylation, reforming, hydrocracking, hydroforming, hydroge...
Found on http://www.encyclo.co.uk/local/21121

refining

Any process that purifies or converts something into a more useful form. Metals usually need refining after they have been extracted from their ores by such processes as smelting. Petroleum, or crude oil, needs refining before it can be used; the process involves fractional distillation, the separation of the substance into separate components ...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0006225.html

refining

Conversion of crude oil into useful products, such as naphtha, the most important feedstock for the petrochemical industry. Every refinery begins with the separation of crude oil into different fractions by distillation. The fractions are further treated to convert them into mixtures of more useful products by various methods such as cracking, refo...
Found on http://www.encyclo.co.uk/local/21114

refining

process of removing impurities from liquid charges like metals, alloys or semiconductors
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=841-22-17

refining

refining, any of various processes for separating impurities from crude or semifinished materials. It includes the finer processes of metallurgy, the fractional distillation of petroleum into its commercial products, and the purifying of cane, beet, and maple sugar and many other substances. The nat...
Found on http://www.infoplease.com/ce6/sci/A0841395.html

Refining

The process of cutting, breaking, and flattening the cellulose fibers in pulp. In order to form a strong, flexible paper, pulp fibers need to be flattened and frayed. The refiner has metal discs that can be adjusted to create longer or shorter fibers.
Found on http://www.encyclo.co.uk/local/20829

Refining

To process material to a pure state. Precious metal bullion is fire refined to high purity gold and silver.
Found on http://www.insidemetals.com/index.php?view=mining_glossary

refining

[n] - the process of removing impurities (as from oil or metals or sugar etc.)
Found on http://www.webdictionary.co.uk/definition.php?query=refining
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