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vacuum cracking

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  • Cracking joints — is the action of moving joints to produce a sharp cracking or popping sound. The most common form of this occurs during deliberate knuckle cracking. It is possible to crack many other joints, such as those between the back and neck vertebrae,… …   Wikipedia

  • Vacuum distillation — At atmospheric pressure, dimethyl sulfoxide boils at 189°C. Under a vacuum, it distills off into the connected receiver at only 70°C. Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is …   Wikipedia

  • vacuum distillation — 1. A secondary distillation process which uses a partial vacuum to lower the boiling point of residues from primary distillation and extract further blending components. 2. Distillation under reduced pressure, which reduces the boiling… …   Petroleum refining glossary

  • Vacuum distillation —   Distillation under reduced pressure (less the atmospheric) which lowers the boiling temperature of the liquid being distilled. This technique with its relatively low temperatures prevents cracking or decomposition of the charge stock.   U.S.… …   Energy terms

  • Fluid catalytic cracking — (FCC) is the most important conversion process used in petroleum refineries. It is widely used to convert the high boiling hydrocarbon fractions of petroleum crude oils to more valuable gasoline, olefinic gases and other products.cite book|author …   Wikipedia

  • Wallace and Gromit's Cracking Contraptions — Wallace Gromit s Cracking Contraptions Cover art for the Cracking Contraptions R2 DVD Directed by Loyd Price Christopher Sadler P …   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

  • Brazing — This article is about the metal joining process. For the cooking technique, see braising. Brazing practice Brazing is a metal joining process whereby a filler metal is heated above and distributed between two or more close fitting parts by… …   Wikipedia

  • Visbreaker — A visbreaker is a processing unit in oil refinery whose purpose is to reduce the quantity of residual oil produced in the distillation of crude oil and to increase the yield of more valuable middle distillates (heating oil and diesel) by the… …   Wikipedia

  • Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… …   Wikipedia

  • Oil refinery — Anacortes Refinery (Tesoro), on the north end of March Point southeast of Anacortes, Washington An oil refinery or petroleum refinery is an industrial process plant where crude oil is processed and refined into more useful petroleum products,… …   Wikipedia

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