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Class Information
Number: 585/836
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > By addition of extraneous agent, e.g., solvent, etc. > Different, sequentially used agents
Description: Subject matter wherein a plurality of different agents are added one after the other to all or part of the feedstock.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7572948 |
Fulvene purification |
Aug. 11, 2009 |
| 7402720 |
Distillation process for removal of methyl acetylene and/or propadiene from an olefin stream |
Jul. 22, 2008 |
| 7186876 |
Process to prepare a process oil |
Mar. 6, 2007 |
| 7060866 |
High pressure separation of dimethyl ether from an olefin stream |
Jun. 13, 2006 |
| 7015014 |
Isolation of carotenoid crystals |
Mar. 21, 2006 |
| 6875341 |
Process for enhancing the value of hydrocabonaceous natural recources |
Apr. 5, 2005 |
| 6844480 |
Method of separating dimethyl ether from an olefin stream |
Jan. 18, 2005 |
| 6812001 |
Isolation of carotenoid crystals from microbial biomass |
Nov. 2, 2004 |
| 6806398 |
Process for removing mercury from liquid hydrocarbon |
Oct. 19, 2004 |
| 6727398 |
Methods and systems for purifying styrene feedstock comprising use of low palladium catalyst |
Apr. 27, 2004 |
| 6559248 |
Process of removing contaminants from an olefin stream using extractive distillation |
May. 6, 2003 |
| 6410816 |
Processing oil and method for producing the same |
Jun. 25, 2002 |
| 6268543 |
Method of removing mercury in liquid hydrocarbon |
Jul. 31, 2001 |
| 6146520 |
Selective re-extraction of lube extracts to reduce mutagenicity index |
Nov. 14, 2000 |
| 6066238 |
Hydrocarbon separation |
May. 23, 2000 |
| 6037516 |
Method for removal of oxygenate impurities from organic chemical streams |
Mar. 14, 2000 |
| 5942654 |
Process for the removal of corrosive compounds from a fluid stream |
Aug. 24, 1999 |
| 5741932 |
Process for preparation of ajoene |
Apr. 21, 1998 |
| 5476986 |
Method for cleaning a mixture of air and vapor from volatile crude oil with recovery of the hydrocarbons, and a system for use in the method |
Dec. 19, 1995 |
| 5434329 |
Treatment of spent refinery caustic |
Jul. 18, 1995 |
| 5322927 |
Method for producing polymers |
Jun. 21, 1994 |
| 5220103 |
Process for the preparation of a cumene feed for cumene oxidation |
Jun. 15, 1993 |
| 5191149 |
Method of refining liquified petroleum gases into aerosol propellants |
Mar. 2, 1993 |
| 5120902 |
Process for the preparation of a cumene feed for cumene oxidation |
Jun. 9, 1992 |
| 5106484 |
Purifying feed for reforming over zeolite catalysts |
Apr. 21, 1992 |
| 4992618 |
Adsorptive separation process for the purification of heavy normal paraffins with non-normal hydrocarbon pre-pulse stream |
Feb. 12, 1991 |
| 4940831 |
Purification of cis-olefins |
Jul. 10, 1990 |
| 4642408 |
Method for the removal of nickel, aluminum and chlorine from olefin oligomers |
Feb. 10, 1987 |
| 4558168 |
Production of high purity butene-1 from an n-butane feedstock |
Dec. 10, 1985 |
| 4433194 |
Purification of cyclohexane |
Feb. 21, 1984 |
| 4401838 |
Purification of hydrocarbons by treatment with polyamines |
Aug. 30, 1983 |
| 4292141 |
Isolation of butadiene from a C.sub.4 -hydrocarbon mixture |
Sep. 29, 1981 |
| 4229607 |
Process for recovery of ethylene oligomers |
Oct. 21, 1980 |
| 4203927 |
Olefin oxidation process |
May. 20, 1980 |
| 4161496 |
Novel method of treating a charge hydrocarbon stream containing isobutene and also butadiene |
Jul. 17, 1979 |
| 4083772 |
Aromatic hydrocarbon separation process |
Apr. 11, 1978 |
| 4060567 |
Method of reducing .alpha.-acetylene content of hydrocarbon |
Nov. 29, 1977 |
| 4028485 |
Non-aqueous removal of soluble hydrogenation catalyst |
Jun. 7, 1977 |
| 4022839 |
Recovery of aluminum from ethylene telomer product |
May. 10, 1977 |
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