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Class Information
Number: 585/835
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > With fractional disengagement from agent by use of other agent
Description: Subject matter wherein a hydrocarbon-containing feedstock or a portion thereof, engaged with an extraneous agent, e.g., dissolved in a solvent, complexed with a complexing agent, etc., is treated with a second agent to remove a part only of the engaged nonagent material.










Patents under this class:

Patent Number Title Of Patent Date Issued
8101812 Extraction of hydrocarbons from hydrocarbon-containing materials Jan. 24, 2012
6875341 Process for enhancing the value of hydrocabonaceous natural recources Apr. 5, 2005
6416655 Selective extraction using mixed solvent system Jul. 9, 2002
6350372 Mercury removal in petroleum crude using H2S/C Feb. 26, 2002
5942654 Process for the removal of corrosive compounds from a fluid stream Aug. 24, 1999
5563315 Separation of aromatic hydrocarbons from a mixture of aromatic and non-aromatic hydrocarbons by solute swing extraction Oct. 8, 1996
5352336 Removal of low-boiling fractions from high temperature heat transfer systems Oct. 4, 1994
5256258 Removal of low-boiling fractions from high temperature heat transfer systems Oct. 26, 1993
5237122 Alkylation catalyst regeneration Aug. 17, 1993
5202520 Method for aromatic hydrocarbon recovery Apr. 13, 1993
5073669 Method for aromatic hydrocarbon recovery Dec. 17, 1991
4997547 Method for the production of an aromate concentrate suitable for use as blending component for fuel Mar. 5, 1991
4962275 Method and apparatus for supercritical fluid extraction solution separation Oct. 9, 1990
4863587 Method for recovery of a phenolic polymerization inhibitor Sep. 5, 1989
4836896 Separation of m-diisopropylbenzene from p-diisoproylbenzene by azeotropic distillation with acetophenone Jun. 6, 1989
4761222 Method for separating normally liquid organic compounds Aug. 2, 1988
4740632 Process for removing methanol from alkylation unit feed stream Apr. 26, 1988
4508597 Recovery of organic solvents from liquid mixtures Apr. 2, 1985
4267034 Separating olefins from paraffins with dimethyl sulfoxide extractant May. 12, 1981
4174353 Olefin separation process Nov. 13, 1979











 
 
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