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| Number | Title | Issue Date |
| 6312652 | Ceramic dip pipe and tube reactor for ethylene production A furnace construction for cracking of saturated hydrocarbon feed stocks to olefinic product mixtures, wherein the reaction lines of such furnace are fabricated of a ceramic refractory feed inlet pipe coaxially located with a ceramic refractory tube to de... | 11/06/2001 |
| 6235961 | Process for pretreating cracked gas before caustic tower treatment in ehtylene plants An inline, high-shear mixer is provided in a cracked gas stream upstream of a caustic tower in an ethylene production unit. Spent caustic is withdrawn from the bottom of the caustic tower and pumped to the mixer, where the spent caustic mixes with and abs... | 05/22/2001 |
| 6210583 | Spent caustic pretreatment and enhanced oxidation process A process for pre-treating a spent caustic stream prior to oxidation which includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic using a solvent to yield a spent caustic raffinate ... | 04/03/2001 |
| 5981818 | Integrated cracking and olefins derivative process utilizing dilute olefins A novel process is provided which integrates the cracking of hydrocarbon containing feedstocks with the olefins purification and olefins derivative process utilizing dilute olefin feedstocks.... | 11/09/1999 |
| 5976355 | Low residence time catalytic cracking process A process for producing liquid fuels from heavy hydrocarbons such as residual oil in which the cracking temperatures are in the range of 800° F. to 1200° F., and the residence times are between 0.05 seconds and 0.50 seconds.... | 11/02/1999 |
| 5939596 | Butadiene removal system for ethylene plants with front end hydrogenation systems The present invention provides a process and system for the removal of butadiene from a cracked gas stream prior to entering a front end hydrogenation reactor in an olefin production facility.... | 08/17/1999 |
| 5885422 | Spent caustic (pre)treatment process A process for pretreating a spent caustic stream prior to oxidation includes countercurrent multi-stage elevated temperature solvent extraction of dissolved organic material from the spent caustic using a solvent to yield a spent caustic raffinate contain... | 03/23/1999 |
| 5859304 | Chemical absorption process for recovering olefins from cracked gases The present invention provides an improved method for recovering high purity olefins from cracked gas effluents or other parafin/olefin gaseous mixtures by use of a chemical absorption process.... | 01/12/1999 |
| 5837129 | Process and apparatus for separating fluidized cracking catalysts from hydrocarbon vapor The invention is a process and apparatus for rapidly and efficiently separating a fluidized catalytic cracking mixture into cracking catalysts and hydrocarbon vapor. The invention decreases the production of unwanted hydrocarbon byproducts by decreasing t... | 11/17/1998 |
| 5768913 | Process based mixed refrigerants for ethylene plants A process and system for providing cooling service (refrigerant) for a gas separation process wherein the refrigerant is obtained from the system process fluid and after serving as refrigerant is returned to the process side for separation into product.... | 06/23/1998 |
| 5766558 | Fluid catalytic cracking process and apparatus The present invention provides an apparatus for improving the contacting of feedstock and regenerated catalytic particulates in certain fluid catalytic cracking processes and apparatus.... | 06/16/1998 |
| 5763715 | Butadiene removal system for ethylene plants with front end hydrogenation systems The present invention provides a process and system for the removal of butadiene from a cracked gas stream prior to entering a front end hydrogenation reactor in an olefin production facility.... | 06/09/1998 |
| 5730859 | Process for catalytically cracking paraffin rich feedstocks comprising high and low concarbon components A process for contemporaneously catalytically cracking a paraffin rich feedstock and a heavy feedstock wherein the feedstocks are segregated prior to catalytic cracking in separate reactors with regenerated particulate catalyst solids. The process provide... | 03/24/1998 |
| 5723040 | Fluid catalytic cracking process and apparatus The present invention provides a method for improving the contacting of feedstock and regenerated catalytic particulates in certain fluid catalytic cracking processes and apparatus.... | 03/03/1998 |
| 5662868 | Short residence time cracking apparatus and process A novel apparatus and process for the cracking of hydrocarbons is disclosed which is particularly useful in revamping an existing FCC unit to a short residence time FCC unit.... | 09/02/1997 |
| 5571482 | Apparatus for controlling catalyst temperature during regeneration A catalyst cooler apparatus and process for use with a two-stage regeneration system in a fluidized catalytic cracking process having a device to remove hot catalyst from the second regeneration zone at a point above the air distribution ring under the su... | 11/05/1996 |
| 5565176 | Catalytically cracking paraffin rich feedstocks comprising high and low concarbon components An apparatus for contemporaneously catalytically cracking a paraffin rich feedstock and a heavy feedstock wherein the feedstocks are segregated prior to catalytic cracking in separate reactors with regenerated particulate catalyst solids. The apparatus pr... | 10/15/1996 |
| 5523502 | Flexible light olefins production A novel process having improved flexibility in olefins production is provided which integrates a deep catalytic cracking process with a steam cracking process, and optionally, also including steps of disproportionation and C4 hydrocarbon proces... | 06/04/1996 |
| 5435906 | Process for catalytically cracking feedstocks paraffin rich comprising high and low concarbon components A process for contemporaneously catalytically cracking a paraffin rich feedstock and a heavy feedstock wherein the feedstocks are segregated prior to catalytic cracking in separate reactors with regenerated particulate catalyst solids. The process provide... | 07/25/1995 |
| 5427655 | High capacity rapid quench boiler A quench boiler apparatus and process is disclosed wherein the hot effluent gases are indirectly cooled by contact with a central internal cold side, one or more internal bayonets and one or more waterwall tubes.... | 06/27/1995 |
| 5414170 | Mixed phase front end C2 acetylene hydrogenation The present invention provides an improved process for selectively hydrogenating acetylenes in an olefin plant process stream by selectively hydrogenating the acetylenes downstream of a front end depropanizer and upstream of further separation zones such ... | 05/09/1995 |
| 5382707 | Integrated MTBE process There is provided a novel integrated process for producing methyl tertiary butyl ether from a C4 containing hydrocarbon feedstock comprising passing the feedstock through zones of butadiene hydrogenation, MTBE synthesis, paraffin/olefin separat... | 01/17/1995 |
| 5368726 | Apparatus for treating and regenerating spent caustic The present invention relates to an apparatus for treating and regenerating a spent caustic solution at ambient temperatures which includes means for oxidizing the spent caustic stream with an air/ozone gas mixture, followed by irradiating the oxidized sp... | 11/29/1994 |
| 5340545 | Particulate solids cracking apparatus A catalytic cracking unit is disclosed which provides for quenching of a riser reactor effluent downstream of a rough cut separator and upstream of a cyclone separator.... | 08/23/1994 |
| 5324484 | Particulate solids cracking apparatus and process A catalytic cracking unit is disclosed which provides for separation and quenching of a catalytic cracking effluent.... | 06/28/1994 |
| 5320741 | Combination process for the pretreatment and hydroconversion of heavy residual oils A novel method is disclosed for the hydroconversion of a heavy hydrocarbon feedstock wherein the feed is partially hydroconverted and demetalized in the presence of a catalytic additive and then the hydroconversion is completed in an ebullent bed reactor ... | 06/14/1994 |
| 5280756 | NOx Emissions advisor and automation system A method and system for controlling and providing guidance in reducing the level of NOx emissions based on controllable combustion parameters and model calculations while maintaining satisfactory plant performance and not causing other harmful ... | 01/25/1994 |
| 5271827 | Process for pyrolysis of hydrocarbons An improved hydrocarbon pyrolysis process and apparatus for the production of ethylene comprising a novel furnace comprised of an unfired superheater radiant section and a fired radiant section, adiabatic tube reactor and quench boiler is provided.... | 12/21/1993 |
| 5268104 | Process for treating and regenerating spent caustic The present invention relates to a process for treating and regenerating a spent caustic solution at ambient temperatures which includes oxidizing the spent caustic stream with an air/ozone gas mixture, followed by irradiating the oxidized spent caustic s... | 12/07/1993 |
| 5259855 | Apparatus for separating fluidized cracking catalysts from hydrocarbon vapor The invention is a process and apparatus for rapidly and efficiently separating a fluidized catalytic cracking mixture into cracking catalysts and hydrocarbon vapor. The invention decreases the production of unwanted hydrocarbon byproducts by decreasing t... | 11/09/1993 |
| 5254318 | Lined reformer tubes for high pressure reformer reactors A reformer tube assembly for use in reformer reactors including a ceramic tube having an open top end and a closed bottom end, a corrosive resistant liner for the ceramic tube also having an open top end and closed bottom end and a centrally disposed meta... | 10/19/1993 |
| 5220093 | Process for production of olefins from mixtures of light paraffins Process for catalytic dehydrogenation of a mixture of light paraffins including passing accelerated catalyst with an acceleration gas into a mixing zone for contact with mixed paraffin feedstock, passing the feedstock/catalyst into a reaction zone, separa... | 06/15/1993 |
| 5181937 | Apparatus for production of synthesis gas using convective reforming A convective reformer device is provided which is useful for partially reforming a feed mixture of hydrocarbons and steam. The device includes an outer shell enclosure and a tubular inner core assembly and is specifically adapted to support heat exchange ... | 01/26/1993 |
| 5181482 | Sootblowing advisor and automation system A method and system for controlling and providing guidance in sootblowing based on continuous plant monitoring and model calculations. The continuous monitoring of plant conditions is through a plant distributed control system (DCS) which communicates wit... | 01/26/1993 |
| 5167795 | Process for the production of olefins and aromatics A process for the production of olefins and aromatics from hydrocarbon feedstocks by catalytically cracking alone or cracking and dehydrogenating the hydrocarbons in the presence of an entrained stream of catalytic heat carrying solids at short residence ... | 12/01/1992 |
| 5160623 | Apparatus and process for fluid-fluid contact A process and apparatus for effecting liquid-liquid contact in a plurality of stages between heavy and light liquid streams is provided wherein said streams are capable of undergoing mass transfer with one another or constituents in either stream are capa... | 11/03/1992 |
| 5151158 | Thermal cracking furnace A thermal cracking furnace comprising horizontally disposed and vertically disposed radiant tube sections.... | 09/29/1992 |
| 5147511 | Apparatus for pyrolysis of hydrocarbons An improved hydrocarbon pyrolysis process and apparatus for the production of ethylene comprising a novel furnace comprised of an unfired superheater radiant section and a fired radiant section, adiabatic tube reactor and quench boiler is provided.... | 09/15/1992 |
| 5114682 | Apparatus for recovering heat energy from catalyst regenerator flue gases An improved fluidized catalytic cracking-catalyst regeneration process for catalytically cracking heavy hydrocarbon feedstocks is provided which comprises first and second, relatively lower and higher temperature, catalyst regeneration zones, wherein CO-r... | 05/19/1992 |
| 5110323 | Process for the return of recovered particulate solids by a cyclone separator to a vessel A process for transferring and regulating the recycle of particulate solids separated from a gas-particulate solids suspension in which an auxiliary vesssel and slanted pipe are provided to transfer and regulate particulate solids flow.... | 05/05/1992 |
