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Class Information
Number: 208/13
Name: Mineral oils: processes and products > Treatment of refining sludge
Description: Processes which include the treatment of a sludge obtained in the refining of mineral oils to recover additional mineral oil values therefrom.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8562816 Tank cleaning system and apparatus Oct. 22, 2013
8535542 Filter press with integrated radio frequency heating Sep. 17, 2013
8197667 Method to recover crude oil from sludge or emulsion Jun. 12, 2012
8080156 Mercury removal from crude oil Dec. 20, 2011
7919665 Mercury removal from hydrocarbons Apr. 5, 2011
7901569 Process for upgrading heavy oil using a reactor with a novel reactor separation system Mar. 8, 2011
7794586 Viscoelastic upgrading of heavy oil by altering its elastic modulus Sep. 14, 2010
7754661 Recycling of oil-based drilling muds Jul. 13, 2010
7727377 System and process for the treatment of multiphase residues Jun. 1, 2010
7695610 Light fuel oil Apr. 13, 2010
7658838 Delayed coking process for producing free-flowing coke using polymeric additives Feb. 9, 2010
7594996 Petroleum recovery and cleaning system and process Sep. 29, 2009
7517458 Process obtaining landfill disposable wasted from hydrocarbon containing sludge Apr. 14, 2009
7390398 Process for upgrading heavy oil using a highly active slurry catalyst composition Jun. 24, 2008
7008528 Process and system for continuously extracting oil from solid or liquid oil bearing material Mar. 7, 2006
6689925 Conversion of drilling waste to fuel Feb. 10, 2004
6673231 Method for removing sludge in crude oil tank and recovering oil therefrom Jan. 6, 2004
6549817 Method for regulating centrifuges for dehydrating wastewater sludge, using fuzzy logic Apr. 15, 2003
6245216 Method for fluidizing tars Jun. 12, 2001
6214236 Process for breaking an emulsion Apr. 10, 2001
6204421 Method of disposing of waste in a coking process Mar. 20, 2001
6168708 Method for recovery and recycling of hydrocarbon residue Jan. 2, 2001
6120680 Sludge liquefaction process and agents Sep. 19, 2000
6117305 Method of producing water slurry of SDA asphaltene Sep. 12, 2000
6061383 Method and apparatus for tuning polychlorinated biphenyl to harmless May. 9, 2000
6056882 Process of breaking a sludge emulsion with a ball mill followed by separation May. 2, 2000
6004519 Aluminum promoted hydrogenation of alkylation sludge for aluminum chloride recovery Dec. 21, 1999
5998640 Method for recovering oil from an oil-bearing solid material Dec. 7, 1999
5928495 Emulsion for heavy oil dilution and method of using same Jul. 27, 1999
5922189 Process to refine petroleum residues and sludges into asphalt and/or other petroleum products Jul. 13, 1999
5914031 Process in a reducing medium of chemically transforming complex chemical structures in a supercritical fluid Jun. 22, 1999
5897767 Composition and process for the treatment and recovery of oil sludge Apr. 27, 1999
5888375 Method of treating oil sludge Mar. 30, 1999
5888920 Integrated process using in situ regenerated sulfuric acid as catalyst Mar. 30, 1999
5865956 Process and apparatus for the conversion of sludges Feb. 2, 1999
5853563 Treatment of waste petroleum Dec. 29, 1998
5847248 Process and apparatus for the conversion of sludges Dec. 8, 1998
5814206 Passive acid tar neutralization process Sep. 29, 1998
5711870 Delayed coking process with water and hydrogen donors Jan. 27, 1998
5690811 Method for extracting oil from oil-contaminated soil Nov. 25, 1997
5681449 Process for producing oil from organic material-containing sludge Oct. 28, 1997
5656041 Method for detoxifying coal-tar deposits Aug. 12, 1997
5653865 Method and apparatus for recovering the fuel value of crude oil sludge Aug. 5, 1997
5589599 Pyrolytic conversion of organic feedstock and waste Dec. 31, 1996
5573656 Process for converting acid sludge to asphalt Nov. 12, 1996
5547655 Recovery and regeneration of sulfuric acid Aug. 20, 1996
5470455 Process for converting acid sludge to intermediate sludge and soft and/or hard asphalt Nov. 28, 1995
5466361 Process for the disposal of aqueous sulfur and caustic-containing wastes Nov. 14, 1995
5443717 Recycle of waste streams Aug. 22, 1995
5347069 Treating oily wastes Sep. 13, 1994

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