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| Number | Title | Issue Date |
| 8163971 | Method of providing heat for chemical conversion and a process and system employing the method for the production of olefin A method and system for providing heat to a chemical conversion process is advantageously employed in the production of olefin by the catalytic dehydrogenation of a corresponding hydrocarbon. The catalytic dehydrogenation process employs diluent steam operating at a... | 04/24/2012 |
| 7309383 | Process for removing solid particles from a gas-solids flow Catalyst losses are prevented in riser reactor systems by using a low inlet velocity for the first cyclone separator in each multi-stage cyclone separator in the reactor. Catalyst particles not separated from the product output flow in an oxygenate-to-olefin reactor... | 12/18/2007 |
| 7273961 | Quench process The present invention is a process for quenching a reactor effluent stream. The reactor effluent stream comprises water, olefin product, and methanol and is further entrained with catalyst fines. The process removes water, catalyst fines, and methanol. Particularly,... | 09/25/2007 |
| 7271306 | Heat recovery from the effluent stream of an oxygenate-to-olefin process The present invention comprises a process for cooling a reactor effluent stream from a methanol-to-olefins reactor. The process is efficient and recovers heat from the reactor effluent stream in one or more highly usable forms, preferably high pressure superheated s... | 09/18/2007 |
| 6884863 | Catalyst fines handling and disposal process The present invention is directed to a process for handling and/or disposing catalyst fines produced in an oxygenate-to-olefins reactor. The process enhances the way catalyst fines are separated from the liquid fraction by use of a flocculent. ... | 04/26/2005 |
| 6870072 | Heat recovery in an olefin production process Disclosed is a process for recovering heat in an oxygenate to olefin (“OTO”) production process. The process includes removing heat while maintaining the temperature of an effluent stream that comprises solid particles (typically catalyst particles) and a gas ph... | 03/22/2005 |
| 6777585 | Catalyst fines handling and disposal process The present invention is directed to a process for handling and/or disposing catalyst fines produced in an oxygenate-to-olefins reactor. The process enhances the way catalyst fines are separated from the liquid fraction by use of a flocculent. ... | 08/17/2004 |
| 6482998 | Process for converting oxygenates to olefins with direct product quenching for heat recovery The present invention relates to a process for catalytically converting a feedstock comprising an oxygenate to olefins utilizing a heat exchange device to transfer heat from at least a portion of an effluent of an oxygenate conversion reactor to the feeds... | 11/19/2002 |
| 6459009 | Two-stage quench tower for use with oxygenate conversion process The invention is a process for recovering heat and removing impurities from a reactor effluent stream withdrawn from a fluidized exothermic reaction zone for conversion of oxygenates into light olefins from an oxygenate feedstream. The process comprises a... | 10/01/2002 |
| 6267873 | Fluidized catalytic cracking process A fluidized catalytic cracking process for catalytically cracking a feed to lighter products includes introducing a heated catalyst and the feed into a bottom riser of a fluidized catalytic cracking apparatus and allowing the heated catalyst and the feed ... | 07/31/2001 |
| 6171449 | Cascade reboiling of ethylbenzene/styrene columns Apparatus and process are disclosed for the distillation separation of styrene monomer from ethylbenzene utilizing a split feed to two distillation columns in conjunction with cascade reboiling utilizing thermal energy from the overhead of one column to s... | 01/09/2001 |
| 6121504 | Process for converting oxygenates to olefins with direct product quenching for heat recovery The present invention relates to a process for catalytically converting a feedstock comprising an oxygenates to olefins with direct product quenching to increase heat recovery and to improve heat integration.... | 09/19/2000 |
| 6020534 | Process for production of propylene and ethylene by non-catalytic oxycracking of propane or propane-rich C2 -C4 paraffins A process for the production of propylene and ethylene by non-catalytic oxidative conversion of propane by allowing the endothermic hydrocarbon cracking reaction to occur simultaneously with the exothermic hydrocarbons oxidative conversion reactions in an... | 02/01/2000 |
| 5914029 | High efficiency desulfurization process Economies in capital cost and operation of a hydrocarbon refining unit for desulfurization of diesel fuel are provided by a heat exchange sequence which eliminates the need for a fired heater on the product fractionation zone. The feed to the fractionatio... | 06/22/1999 |
| 5800697 | FCC process with dual function catalyst cooling An FCC reactor and regenerator arrangement provides substantially independent control of temperature on the reactor side and regenerator side of the process. The arrangement withdraws cooled regenerated catalyst for transfer to a reactor riser and cooled ... | 09/01/1998 |
| 5763725 | Process for the production of ethylene by non-catalytic oxidative cracking of ethane or ethane rich C2 -C4 paraffins An improved process for the production of ethylene by non-catalytic oxidative cracking of ethane or ethane rich C2 -C4 paraffins with high conversion, selectivity and productivity, operating in a most energy efficient and safe manner... | 06/09/1998 |
| 5738779 | Hydrotreating process with two phase flow splitting and heat recovery In a hydrotreating process a two phase flow splitter is used in combination with parallel heat exchanger trains for heat transfer stability. Flow maldistribution of liquid and vapor between heat exchanger trains is thereby avoided without more complex fee... | 04/14/1998 |
| 5710356 | Method of conducting an endothermic reaction in a packed-bed reactor with external energy addition A novel, packed-bed, reverse flow reactor is provided for the endothermic dehydrogenation of ethylbenzene to styrene. The catalyst bed is flanked by inert end sections to prevent the occurrence of the reverse reaction. Ethylbenzene vapor is added at one e... | 01/20/1998 |
| 5600052 | Process and apparatus for controlling reaction temperatures A reactor arrangement and process for indirectly contacting a reactant stream with a heat exchange stream uses an arrangement of heat exchange plates to control temperature conditions by varying the heat transfer factor in different portions of a continuo... | 02/04/1997 |
| 5599510 | Catalytic wall reactors and use of catalytic wall reactors for methane coupling and hydrocarbon cracking reactions Dual-flow chemical reactor cores containing catalytic heat-transfer walls comprising both a gas-impervious material and a suitable catalyst which allows oxidative coupling of methane into higher hydrocarbons, dual-flow reactors having these catalytic heat... | 02/04/1997 |
| 5573645 | Process and apparatus for the separation of aromatic hydrocarbons A distillation process and apparatus for recovering high purity aromatic products from a mixed aromatic hydrocarbon feedstock containing benzene, toluene and xylene by use of distillation towers integrated by heat exchange whereby substantial savings in o... | 11/12/1996 |
| 5365006 | Process and apparatus for dehydrogenating alkanes An alkane-containing feedstream is passed through one or more tubes, which may contain alkane-dehydrogenation catalyst, immersed in a bed of fluidized particles. The bed is at an elevated temperature which maintains the temperature within the tube(s) at a... | 11/15/1994 |
| 5336821 | Alkylation process with reactor effluent heat recovery A process for the alkylation of aromatic hydrocarbons such as cumene and ethylbenzene is disclosed. A portion of the effluent stream from an alkylation reactor passes through an indirect heat exchanger to transfer heat to a flashed stream containing the p... | 08/09/1994 |
| 5315056 | Catalyst regeneration in a dehydrogenation process In a dehydrogenation process wherein catalyst is regenerated off-stream by use of heated air, at least two reactors are in the regeneration cycle, with regeneration air being heated to regeneration catalyst temperature for introduction into the first reac... | 05/24/1994 |
| 5254781 | Olefins process which combines hydrocarbon cracking with coupling methane An olefins process is described which combines cracking of a hydrocarbon feedstock with the coupling of methane using an oxygen-affording gas such that the heat evolved in the exothermic methane coupling reaction is effectively transferred to the endother... | 10/19/1993 |
| 5243122 | Dehydrogenation process control In a steam active catalytic process employing a fixed catalyst bed for the dehydrogenation of alkanes to alkenes wherein reaction temperatures above about 500° C. (932° F.) must be maintained for commercially feasible conversions, the decline in catalys... | 09/07/1993 |
| 5215650 | Cooling exothermic regenerator with endothermic reactions Operational flexibility of a fluid catalytic cracking process is improved by indirectly cooling catalyst in an endothermic catalyst cooler. Catalyst withdrawn from the FCC unit is cooled by driving an endothermic chemical reaction, which may be either the... | 06/01/1993 |
| 5214225 | Dehydrogenation process with improved heat recovery A process for making ethylenically unsaturated hydrocarbons from a saturated C3 -C5 hydrocarbon feed with improved heat recovery. The feed is partially vaporized against hot discharge gases from product compressors, completely vapori... | 05/25/1993 |
| 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 |
| 5162599 | Rapid thermal pyrolysis of gaseous feeds containing hydrocarbon molecules mixed with an inert working gas In its simplest sense, the present invention is directed toward a process for the thermal conversion of methane into unsaturated gaseous hydrocarbons, especially olefins, comprising first compressing methane in the presence of an inert gas having a higher... | 11/10/1992 |
| 5053573 | Reduction of benzene content of reformate by reaction with cycle oils Conversion of benzene to heavier aromatics by contact with alkyl polynucleararomatics, preferably FCC heavy cycle oil, in the presence of an alkylation/transalkylation catalyst is disclosed. Efficient conversion of relatively dilute benzene in reformate i... | 10/01/1991 |
| 5030789 | Catalytic method for the dimerization, codimerization or oligomerization of olefins with the use of an autogenous thermoregulation fluid The invention provides a catalytic method for the dimerization or codimerization or oligomerization, in particular selective, of olefins, carried out under pressure, in a reaction zone 1 containing a solid catalyst bed in which is disposed a plurality of ... | 07/09/1991 |
| 5026946 | Homogeneous partial oxidation of a methane-containing paraffinic hydrocarbon A C2 and higher hydrocarbon product including ethylene is produced from a methane-containing gaseous paraffinic hydrocarbon feedstock by a process comprising heating the feedstock admixed with oxygen in an amount of at least 5% mol under elevat... | 06/25/1991 |
| 5012028 | Process for upgrading light hydrocarbons using oxidative coupling and pyrolysis A process for converting a gaseous reactant comprising methane or natural gas to higher molecular weight hydrocarbon products is disclosed which comprises: (1) contacting said gaseous reactant with an oxidative coupling catalyst at a reaction temperature ... | 04/30/1991 |
| 4956509 | Integrated paraffin upgrading and catalytic cracking processes A process is disclosed for decreasing the emission of airborne pollutants from an oil refinery and for upgrading a paraffinic feedstream to olefins and/or aromatics. Flue gas from a fluid catalytic cracking process catalyst regenerator is cooled to supply... | 09/11/1990 |
| 4943669 | Method according to the invention is notably applied to the selective dimerization of propylene into methyl-4-pentene-1 The invention provides a catalytic method for the dimerization or codimerization or oligomerization, particularly selectively, of olefins, carried out under pressure, in a reaction zone 1 containing a solid catalyst bed into which is disposed a plurality ... | 07/24/1990 |
| 4894210 | Purification of a hydrocarbon mixture Desulphurization of saturated or near saturated gaseous hydrocarbon stream is effected using a bed of a particulate adsorbent comprising zinc oxide. Condensation of the higher boiling components is avoided by heating the raw gas to a temperature at least ... | 01/16/1990 |
| 4886932 | Thin bed cofeed reaction system for methane conversion The invention relates to the conversion of methane to higher hydrocarbons by reaction of methane and gaseous oxidant under adiabatic conditions in a thin bed reactor, wherein the hydrocarbon feed contains 1 to 10 wt % C2+ alkanes bas... | 12/12/1989 |
| 4876409 | Thin bed cofeed reactors for methane conversion The invention relates to the conversion of methane to higher hydrocarbons by reaction of methane and gaseous oxidant under adiabatic conditions in a thin bed reactor, and to reactors for carrying out this reaction.... | 10/24/1989 |
| 4859308 | Two-stage process for conversion of alkanes to gasoline Lower alkanes are converted to olefins in a `third bed` external catalyst cooler (ECC) in which hot catalyst, from a first regenerator (`second bed`) operating in conjunction with a fluid catalytic cracker (`first bed`), thermally cracks and dehydrogenate... | 08/22/1989 |
