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| Number | Title | Issue Date |
| 7878700 | Polymer removal from a polymer mixer A method and apparatus for controlling the removal of polymer from a mixer using an outlet gate that is coupled to an actuator by way of a pair of flanges, one flange carrying a protuberance and the other flange carrying a depression into which the protuberance fits... | 02/01/2011 |
| 7709693 | Toluene production A method for optimizing the production of nitration grade toluene from a solvent extraction process that produces an aromatic rich extract and a saturate rich raffinate, comprising adding an effective amount of the raffinate back to the extract. ... | 05/04/2010 |
| 7709585 | Ethylene recovery from a polymerization process A method for solution polymerizing ethylene wherein an ethane purge stream is separated, subjected to high efficiency cryogenic distillation, and a side cut from that distillation recycled to the polymerization process while the overhead and bottoms from that distil... | 05/04/2010 |
| 7615144 | Hydrocarbon thermal cracking using hardfaced fittings A thermal cracking process that employs (1) a sinusoidal conduit in the convection section of a thermal cracking furnace, (2) a cross-over conduit, and/or (3) a transfer conduit that contains at least one bend fitting, at least one bend fitting carrying a protective... | 11/10/2009 |
| 7614613 | Method of operating a cooling fluid system In a gravity fed cooling tower liquid return system having a common header with a plurality of valved sub-headers, a distributive control system, risers on the sub-headers, and sensor/transmitters on the risers, some of the sensor/transmitters controlling the valves... | 11/10/2009 |
| 7572366 | Method for processing natural gasoline A method for rendering a high Reid Vapor Pressure natural gasoline feed suitable for addition to the gasoline pool by using steam stripping conditions that provide an overhead fraction that is suitable for thermal cracking, and a bottoms product that has a substanti... | 08/11/2009 |
| 7571890 | Valve construction and method of use An actuated valve having a rotatable cam that controls an opening and closing disc and stop members for the cam, the cam having a notch that allows the cam to be stopped between fully open and fully closed, and an adjustable member on the stop member that correspond... | 08/11/2009 |
| 7550642 | Olefin production utilizing whole crude oil/condensate feedstock with enhanced distillate production A method processing a liquid crude and/or natural gas condensate feed comprising subjecting the feed to a vaporization step to form a vaporous product and a liquid product, subjecting the vaporous product to severe thermal cracking, and subjecting the liquid product... | 06/23/2009 |
| 7550638 | Integrated cracking and metathesis process An integrated method that comprises a hydrocarbon thermal cracking operation to form at least one olefin product, coupled with dimerization and metathesis operations, the dimerization operation forming additional feed material for the metathesis operation, and the m... | 06/23/2009 |
| 7531024 | Plug-flow method and apparatus for operating a curvilinear pressure vessel where transport phenomena occur A method and apparatus for operating a pressure vessel containing a bed of particulate material comprising substantially leveling the bed and employing a plug-flow inducer in the bed. ... | 05/12/2009 |
| 7527725 | Upgrading drip oil A method is disclosed for upgrading drip oil comprising subjecting the drip oil to multiple distillation steps to form a stream rich in aromatics and a separate stream rich in dicyclopentadiene. ... | 05/05/2009 |
| 7493800 | Sampling method A method for sampling a host liquid in a vessel to detect the presence of an undesired liquid in the host liquid and removing host liquid that contains undesired liquid from the vessel, wherein an electrical capacitance probe is employed to detect the presence of th... | 02/24/2009 |
| 7491368 | Method for temporary closing and reopening of a reactor tube A method for deliberately plugging the inlet and outlet ends of a reactor tube in a recoverable manner, which method employs at least one vented plug whereby fluid communication within the tube can be established or terminated at will, and the tube is unplugged only... | 02/17/2009 |
| 7491259 | Residence time distribution method and apparatus for operating a curvilinear pressure vessel where transport phenomena take place A method and apparatus for operating a pressure vessel containing a bed of particulate material comprising substantially leveling the bed and employing a fluid flow distributor above the bed. ... | 02/17/2009 |
| 7404889 | Hydrocarbon thermal cracking using atmospheric distillation A method for thermally cracking a hydrocarbonaceous feed wherein the feed is first processed in an atmospheric thermal distillation step to form a light gasoline and atmospheric residuum mixture. The light gasoline/residuum combination is gasified at least in part i... | 07/29/2008 |
| 7396449 | Olefin production utilizing condensate feedstock A method for utilizing natural gas condensate as a feedstock for an olefin production plant wherein the feedstock is subjected to vaporization and separation conditions that remove light hydrocarbons from the condensate for thermal cracking in the plant, and leave l... | 07/08/2008 |
| 7392988 | Rotary seal A rotary seal housing having opposing ends, a first fluid conducting slot at one of the opposing ends, a pair of spaced apart fluid conducting slots at the other opposing end, and sets of apertures connecting the first fluid conducting slot with the pair of fluid co... | 07/01/2008 |
| 7374661 | Thermal cracking A method for thermally cracking a hydrocarbonaceous feed material using a combustion fuel fired furnace wherein at least part of the combustion fuel employed in the furnace is syngas. ... | 05/20/2008 |
| 7374664 | Olefin production utilizing whole crude oil feedstock A method for utilizing whole crude oil as a feedstock for the pyrolysis furnace of an olefin production plant wherein the feedstock is subjected to vaporization conditions until substantially vaporized with minimal mild cracking but leaving some remaining liquid fro... | 05/20/2008 |
| 7348466 | Solvent extraction In a method for the solvent extraction of butadiene from a mixture of hydrocarbons having four carbon atoms per molecule, which method inherently produces tars, the extraction process is operated with a tar loading level, relative to the solvent employed, of no more... | 03/25/2008 |
| 7326823 | Aromatic compound recovery A method for the solvent extraction recovery of an aromatic wherein an aromatic extract is formed that contains the aromatic and non-aromatics that are both lighter than and heavier than the aromatic, analyzing at least two separate groups of lighter and heavier non... | 02/05/2008 |
| 7270740 | Startup of an olefins production plant A method for starting up an olefin production plant without venting gases to the atmosphere wherein an artificial feed is employed in the compression zone of the plant while the furnace and quench zones remain idle, and gases from the compression and refrigeration z... | 09/18/2007 |
| 7159603 | Mechanical hot tapping method A method of mechanically hot tapping petroleum equipment that contains a hydrocarbonaceous fluid in its interior by drilling an aperture in such equipment while employing cooling by cyclic drilling and/or refrigeration, the equipment drilling being carried out in a ... | 01/09/2007 |
| 7153985 | Ethylene oxide production A process for the formation of ethylene oxide wherein the presence of at least one hydrocarbon having four carbon atoms per molecule in the recycle loop gas of the process is used as an indicator of impending post-ignition conditions. ... | 12/26/2006 |
| 7125483 | Corrosion control in olefin production plants A method for reducing acid corrosion and products of acid corrosion in a thermal cracking plant, the acid corrosion products being compounds of iron, chromium, nickel, lead, cadmium, manganese, mercury, magnesium, calcium, sodium, copper, zinc, lead, molybdenum, and... | 10/24/2006 |
| 7090767 | Hydrodesulfurization of gasoline fractions A method for processing a gasoline range hydrocarbon stream wherein a single reactor/distillation tower stream is fractionated into a light fraction and a heavy fraction, the light fraction is hydrodesulfurized, the heavy fraction is optionally hydrocracked and then... | 08/15/2006 |
| 7078577 | DihydroDicyclopentadiene production A method for forming dihydroDicyclopentadiene comprises mixing a source of dicyclopentadiene with at least one solvent and at least one reactive component in the presence of a source of hydrogen and a selective hydrogenation catalyst, the solvent and reactive compon... | 07/18/2006 |
| 7074976 | Propylene production A method for making propylene from alpha olefins, internal linear olefins and isoolefins wherein the alpha olefins are subjected to a combination of hydrogenation and double bond isomerization to form additional internal linear olefins, the internal linear olefins a... | 07/11/2006 |
| 7073530 | Storage tank de-inventorying A method for emptying a liquid storage tank that has a floating roof which becomes stationery a finite distance above the tank bottom, wherein, after the roof becomes stationery, liquid is continued to be withdrawn from inside the tank while vapor is removed from wi... | 07/11/2006 |
| 7043938 | Method of thawing a cryogenic unit A method for thawing and removing frozen material from a cryogenic separation unit such as that found in an olefin production plant comprising employing a flushing agent to thaw and remove the frozen material, purging the flushing agent with a gas, and removing resi... | 05/16/2006 |
| 7019187 | Olefin production utilizing whole crude oil and mild catalytic cracking A method for utilizing whole crude oil as a feedstock for the pyrolysis furnace of an olefin production plant wherein the feedstock after preheating is subjected to mild catalytic cracking conditions until substantially vaporized, the vapors from the mild catalytic ... | 03/28/2006 |
| 6979757 | Olefin production utilizing whole crude oil and mild controlled cavitation assisted cracking A method for utilizing whole crude oil as a feedstock for the pyrolysis furnace of an olefin production plant wherein the feedstock after preheating is subjected to mild thermal cracking assisted with controlled cavitation conditions until substantially vaporized, t... | 12/27/2005 |
| 6977318 | Propylene production A method for forming propylene wherein ethylene is employed as a primary feed material in a combination of steps comprising dehydration, skeletal isomerization, and metathesis to form a versatile product mix that can contain one or more of propylene, gasoline, MTBE,... | 12/20/2005 |
| 6948453 | Hydrocarbon cracking A method for controlling fouling of a heat exchanger that operates downstream of a cracking furnace by injecting liquid water upstream of the heat exchanger. ... | 09/27/2005 |
| 6949686 | Pyrolysis gasoline stabilization A method for stabilizing pyrolysis gasoline by hydrogenating same over a Group VIII metal catalyst wherein the catalyst is promoted against poisoning by at least one metal from Groups I B, VI B, VII B, and zinc. Poisons preferentially bind with the promoters and not... | 09/27/2005 |
| 6927310 | Tripropylene glycol production A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glyc... | 08/09/2005 |
| 6887070 | Fired furnace operation and apparatus A method and apparatus for continuing the operation of a fuel fired furnace when the air supply from the blower to the furnace is interrupted by employing a combination of a ventilator and drop door, the ventilator having a power source independent of the blower. | 05/03/2005 |
| 6888038 | Enhanced production of light olefins A method for reducing the formation of undesired heavy hydrocarbons when catalytically cracking a heavy olefin containing feed stock to a light olefin product by employing an oxygen containing hydrocarbon as a co-feed stock. ... | 05/03/2005 |
| 6884917 | 1-butene production A method for forming high purity 1-butene wherein a feed composed of pentenes and hexenes is subjected to metathesis with ethylene to form a mixture containing propylene, 1-butene, 2-butenes, pentenes, and hexenes, and high purity 1-butene is separately recovered fr... | 04/26/2005 |
| 6872862 | Propylene production A method for making propylene from alpha olefins, internal linear olefins and isoolefins wherein the alpha olefins are subjected to a combination of hydrogenation and double bond isomerization to form additional internal linear olefins, the internal linear olefins a... | 03/29/2005 |
