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Class Information
Number: 585/837
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > Different, sequentially used agents > One agent is a diluent, i.e., nonselective solvent or heat exchange material
Description: Subject matter in which one of the agents serves to heat or cool a material involved in the process or in which the agent dissolves an entire hydrocarbon feedstream.

Patents under this class:

Patent Number Title Of Patent Date Issued
8557087 Process for the separation of a hydrocarbon-containing feed stream Oct. 15, 2013
RE44462 Carbon dioxide fractionalization process Aug. 27, 2013
7777088 Carbon dioxide fractionalization process Aug. 17, 2010
7572948 Fulvene purification Aug. 11, 2009
6100439 Styrene caustic wash extraction aid Aug. 8, 2000
4439629 Extraction process for beta-carotene Mar. 27, 1984
4266086 Process for removing .alpha.-acetylenes from diolefins May. 5, 1981
4098838 Process for obtaining sulfur free pure naphthalene from bituminous coal tar and thionaphthene as a by-product Jul. 4, 1978
4070410 Method of isolating individual normal alkanes from petroleum stock Jan. 24, 1978
3944483 Distillative recovery of aromatics with water addition in azeotropic proportions Mar. 16, 1976

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