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Stone & Webster Engineering Corp. Patents
Assignee:
Stone & Webster Engineering Corp.
Address:
Boston, MA
No. of patents:
59
Patents:


1 2










Patent Number Title Of Patent Date Issued
6312652 Ceramic dip pipe and tube reactor for ethylene production November 6, 2001
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 define an annular space there betwe
6271433 Cat cracker gas plant process for increased olefins recovery August 7, 2001
The invention relates to a new process for more efficient separation and recovery of light olefins such as ethylene and propylene from a fluid catalytic cracking unit. The new process invention for recovering olefins from a mixture of cracked hydrocarbons from a fluid catalytic cracker
6267359 Advanced tray support system using orthogonal grillage July 31, 2001
The present invention relates to the use of orthogonal tray stiffeners in supporting tray panels for process tray.
5981818 Integrated cracking and olefins derivative process utilizing dilute olefins November 9, 1999
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.
5976355 Low residence time catalytic cracking process November 2, 1999
A process for producing liquid fuels from heavy hydrocarbons such as residual oil in which the cracking temperatures are in the range of 800.degree. F. to 1200.degree. F., and the residence times are between 0.05 seconds and 0.50 seconds.
5939596 Butadiene removal system for ethylene plants with front end hydrogenation systems August 17, 1999
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.
5859304 Chemical absorption process for recovering olefins from cracked gases January 12, 1999
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.
5837129 Process and apparatus for separating fluidized cracking catalysts from hydrocarbon vapor November 17, 1998
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 the contact time between the s
5768913 Process based mixed refrigerants for ethylene plants June 23, 1998
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.
5766558 Fluid catalytic cracking process and apparatus June 16, 1998
The present invention provides an apparatus for improving the contacting of feedstock and regenerated catalytic particulates in certain fluid catalytic cracking processes and apparatus.
5763715 Butadiene removal system for ethylene plants with front end hydrogenation systems June 9, 1998
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.
5523502 Flexible light olefins production June 4, 1996
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 C.sub.4 hydrocarbon processing including methyl tertiary buty
5427655 High capacity rapid quench boiler June 27, 1995
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.
5382707 Integrated MTBE process January 17, 1995
There is provided a novel integrated process for producing methyl tertiary butyl ether from a C.sub.4 containing hydrocarbon feedstock comprising passing the feedstock through zones of butadiene hydrogenation, MTBE synthesis, paraffin/olefin separation and skeletal isomerization.
5368726 Apparatus for treating and regenerating spent caustic November 29, 1994
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 spent caustic stream with a broad r
5340545 Particulate solids cracking apparatus August 23, 1994
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.
5324484 Particulate solids cracking apparatus and process June 28, 1994
A catalytic cracking unit is disclosed which provides for separation and quenching of a catalytic cracking effluent.
5280756 NO.sub.x Emissions advisor and automation system January 25, 1994
A method and system for controlling and providing guidance in reducing the level of NO.sub.x emissions based on controllable combustion parameters and model calculations while maintaining satisfactory plant performance and not causing other harmful consequences to the furnace. To impleme
5271827 Process for pyrolysis of hydrocarbons December 21, 1993
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.
5268104 Process for treating and regenerating spent caustic December 7, 1993
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 stream with a broad range of u
5259855 Apparatus for separating fluidized cracking catalysts from hydrocarbon vapor November 9, 1993
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 the contact time between the s
5181937 Apparatus for production of synthesis gas using convective reforming January 26, 1993
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 between a heating fluid, whic
5181482 Sootblowing advisor and automation system January 26, 1993
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 with a computer. The conventional
5167795 Process for the production of olefins and aromatics December 1, 1992
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 times to preferentially produce o
5160623 Apparatus and process for fluid-fluid contact November 3, 1992
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 capable of reaction therebetween and
5147511 Apparatus for pyrolysis of hydrocarbons September 15, 1992
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.
5110323 Process for the return of recovered particulate solids by a cyclone separator to a vessel May 5, 1992
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.
5106587 Particulate solids cracking apparatus April 21, 1992
There is disclosed an improved solids regeneration apparatus for hydrocarbon cracking. The apparatus comprises an entrained bed heater adapter for spouted bed circulation of solids.
5098672 Particulate solids cracking apparatus and process March 24, 1992
A gas-particulate solids separation assembly having a mixed phase solids-gas elongated inlet terminating in a divergent section and horizontally disposed cylcone separators downstream of the separator gas outlets adapted to receive quench oil.
4919898 Particulate solids cracking apparatus April 24, 1990
An apparatus for cracking hydrocarbon with hot particulate solids wherein a curtain of hot particulate solids is delivered to a thermal reactor through peripheral openings and hydrocarbon feed is delivered to the reactor through the curtain of hot particulate solids at an angle.
4901829 Frictional shock absorber enclosed within a housing February 20, 1990
A shock absorbing device having an axial friction brake for the minimization of dynamic motion while allowing motion, seen as especially useful as an alternative to, or in the replacement of, snubber devices. The shock absorbing device has a movable shaft which is attached to the obj
4896496 Single pressure steam bottoming cycle for gas turbines combined cycle January 30, 1990
A process for recapturing waste heat from a gas turbine at a single pressure to drive both a high pressure-high temperature steam turbine and a low pressure steam turbine. By placing the reheat coil of the low pressure steam turbine in a common vessel with a portion of the economizer
4786462 Support structure for a nuclear reactor November 22, 1988
A novel concrete core support structure for nuclear reactors is described.
4761261 Nuclear reactor August 2, 1988
A novel liquid nuclear reactor is described which comprises a reactor vessel that is connected through upper and lower liquid conduit means to one or more satellite tanks that contain a heat exchanger means and pump means.
4737338 Nuclear reactor containing connecting means for connecting a reactor vessel and at least one rec April 12, 1988
Disclosed is a nuclear reactor employing a liquid metal and containing a reactor vessel, and at least one satellite vessel, and a hot and a cold leg connecting means which combine to form a continuous pathway for the flow of the liquid metal between the reactor vessel and the at least on
4663019 Olefin production from heavy hydrocarbon feed May 5, 1987
A process for producing olefins and gasoline from residual oil by thermally cracking a side cut fraction from a fractionation tower, quenching the cracked product with residual oil, producing coke from a portion of the quenched product and using a portion of the coke to provide reaction
4644906 Double tube helical coil steam generator February 24, 1987
A double tube helical coil steam generator is provided in which a multiplicity of inner tubes conducting water are individually surrounded by outer tubes containing liquid metal as a heat transfer agent. The double tubes form into helical coils, providing a large surface area while c
4585543 Method for recovering hydrocarbons from solids April 29, 1986
A system is provided for recovering hydrocarbons from hydrocarbon-containing solids such as oil shale, tar sands or coal. The process includes preheating finely divided solids prior to introduction to a low residence time tubular reactor where a portion of the hydrocarbon is removed
4550769 Solids quench boiler and process November 5, 1985
A process for quenching and cooling reactor effluent is provided. The apparatus utilized to practice the process includes a section for introducing relatively cool particulate solids into a hot effluent stream to effect initial quenching and a section to further cool the composite qu
4497638 Fuel gas generation for solids heating February 5, 1985
An improved process and apparatus for generating fuel gas and decoking particulate solids used as the source of heat to effect chemical reactions in a TRC system.
4496381 Apparatus and method for recovering light hydrocarbons from hydrogen containing gases January 29, 1985
A process and apparatus provide enhanced recovery of ethylene, hydrogen and methane from the effluent produced by cracking olefins. A cracked gas is fractionally condensed in several stages. The overhead vapor from the last stage is refluxed in a rectifier tower to enable recovery of res
4492624 Duocracking process for the production of olefins from both heavy and light hydrocarbons January 8, 1985
The invention is a method for cracking heavy oils to olefins. In parallel streams, the heavy stream and a steam diluent are heated to the point of partial thermal cracking while in the other stream a lighter oil and steam are cracked to produce olefins. The hot, olefinic light stream is
4459071 Solids flow regulator July 10, 1984
An apparatus to serve as a valve to regulate the flow of particulate solids, from an upstream to a downstream location. The valve relies on pressure differential rather than moving mechanical parts. A plenum adjacent a chamber designed to accommodate a slumped mass of particulate sol
4453865 Automatic pressure sensitive regulation assembly June 12, 1984
An automatic pressure sensitive regulation assembly and process is provided for use with a non-mechanical particulate solids flow apparatus. The automatic pressure sensitive regulation assembly comprises first and second pressurized fluid distributors. The first pressurized fluid dis
4437979 Solids quench boiler and process March 20, 1984
A process for quenching and cooling the reactor effluent in a thermal regenerative cracking (TRC) system is disclosed. The process for quenching the reactor effluent includes the steps of introducing particulate solids into the reactor effluent stream, passing the composite stream of rea
4433984 Low residence time solid-gas separation device and system February 28, 1984
This invention relates to an apparatus and method for rapidly separating particulate solids from a mixed phase solids-gas stream which may be at velocities up to 150 ft./sec. and at high temperature. Specifically, the device is designed for incorporation at the discharge of solid-gas
4433193 Process for the production of ethane February 21, 1984
An improved process for producing ethane from aromatic hydrocarbons is described. Hydrogen and the hydrocarbons are introduced into a catalytically inert reactor zone and are reacted under closely controlled conditions which provide an enhanced yield of ethane.
4426359 Solids quench boiler January 17, 1984
Apparatus for quenching and cooling the reactor effluent in a thermal regenerative cracking (TRC) system. The quench apparatus includes a section for introducing relatively cool particulate solids into a hot effluent stream to effect initial quenching and a section to further cool th
4410432 Process for removing hydrogen sulfide from fluids October 18, 1983
A process is disclosed for removing hydrogen sulfide from fluid, particularly geothermal steam. Carbonic acid is sprayed into a condenser to inhibit dissolution of hydrogen sulfide into the condensate and maintain the hydrogen sulfide in gaseous form.
4402713 Process for removing hydrogen sulfide from fluids September 6, 1983
A process is disclosed for removing hydrogen sulfide from fluid, particularly geothermal steam. Condensate rich in hydrogen sulfide is passed countercurrently with vapor rich in carbon dioxide to strip the condensate of hydrogen sulfide.
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