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Class Information
Number: 585/838
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > Different, sequentially used agents > Resolution of feed into more than two different components
Description: Subject matter wherein three or more different materials, contained in the feedstock to the process, are separated from each other.

Patents under this class:

Patent Number Title Of Patent Date Issued
8101812 Extraction of hydrocarbons from hydrocarbon-containing materials Jan. 24, 2012
7718841 Extractive distillation May. 18, 2010
7572948 Fulvene purification Aug. 11, 2009
7186876 Process to prepare a process oil Mar. 6, 2007
6566410 Methods of demulsifying emulsions using carbon dioxide May. 20, 2003
6410816 Processing oil and method for producing the same Jun. 25, 2002
5942654 Process for the removal of corrosive compounds from a fluid stream Aug. 24, 1999
4960958 Catalysts for catalytic pyrolysis of phenol distillation residue and process for recovering useful substances by pyrolysis the same Oct. 2, 1990
4353840 Use of amine-aluminum chloride adducts as alkylation inhibitors in a ligand-complexing process Oct. 12, 1982
4174353 Olefin separation process Nov. 13, 1979
4140587 Process for the separation of diolefins from mixtures containing the same Feb. 20, 1979
4038332 Separation of ethyl fluoride Jul. 26, 1977
3979474 Process for separating isobutylene from C.sub.4 hydrocarbon mixtures Sep. 7, 1976
3944483 Distillative recovery of aromatics with water addition in azeotropic proportions Mar. 16, 1976

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