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8173567 |
Process for regenerating catalyst
Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross...
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8088705 |
Process for sulfurization or presulfurization of solid particles of a catalyst or an adsorbent
The invention relates to a process for incorporating sulfur in the porosity of the solid particles of a catalyst for the conversion of hydrocarbons or an adsorbent. This process is carried out...
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7951739 |
Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units
An improved spent catalyst regenerator which contains sub-troughs branching off from the main trough, distribution troughs which extend outward from the sides of the main trough and the...
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7951740 |
Method of inhibiting in situ silicate formation in desulfurization sorbents
A method for regenerating desulfurization sorbents that minimizes the in situ formation of one or more silicates. It has been discovered that regenerating sulfur-laden sorbent particles in a carbon...
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7935314 |
Apparatus for mixing regenerated and carbonized catalyst
An apparatus for mixing regenerated and carbonized catalyst involves obstructing upward flow of catalyst by one or more baffles between a catalyst inlet and a feed distributor. Each catalyst stream...
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7932204 |
Method of regenerating catalyst in a fluidized catalytic cracking unit
Systems and methods of improving synthesis gas quality in a fluid catalytic cracking unit are disclosed. In one example, a method comprises reacting a first stage regeneration gas comprising oxygen...
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7915191 |
Three-stage counter-current FCC regenerator
This invention is directed to a method and apparatus for regenerating a catalyst used in an FCC unit, including providing a spent catalyst into an upper portion of a regenerator, maintaining a...
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7906697 |
Method of circulating catalyst between a catalyst regenerator and an external catalyst cooler
This invention relates to efficiently regenerating catalyst particles by minimizing the formation of localized “hot spots” and “cold spots” in a regeneration zone. Specifically this inventi...
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7816294 |
Methods and configurations for catalyst regeneration
A catalyst regenerator (100) has a first section (110) and a second section (120) and is operated such that carbon from a carbon-contaminated catalyst (140) is converted to carbon monoxide in the...
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7799287 |
Apparatus and process for regenerating catalyst
Disclosed is an apparatus and process for disengaging regenerated catalyst from flue gas in a catalyst regenerator so as to avoid re-entrainment of catalyst that has settled into a bed in the...
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7749762 |
Test methods for simulating FCC regenerator catalysis and catalyst deactivation
A method for testing the performance of catalysts used for conversion of FCC regenerator gases comprises subjecting the catalyst simultaneously to a mixture of gases including an oxidizing gas and...
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7745365 |
Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units
An improved spent catalyst regenerator which contains sub-troughs branching off from the main trough, distribution troughs which extend outward from the sides of the main trough and the...
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7655589 |
Process and apparatus for the regeneration of spent FCC catalyst
Disclosed is an improved regeneration process and system for the regeneration of a spent FCC catalyst in a regenerator without vertical partitions by introducing different fluidization gas streams...
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7582587 |
Passivation of sulphur hydroconversion catalyst
The present invention concerns a process for ex situ oxidizing passivation of hydrocarbon hydroconversion catalysts, in particular for hydrotreatment in their sulphurized states, in which the...
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7470644 |
Process for combusting coke
The invention pertains to a process for combusting coke of a coke-containing FCC catalyst in a regeneration unit of a FCC unit having the introduction of oxygen-containing gas through a...
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7459595 |
Processes for lifting spent catalyst into a regenerator in an oxygenate to olefins reaction system
This invention provides processes for transporting catalyst, preferably in an oxygenate to olefins reaction system. In one embodiment, an oxygenate contacts molecular sieve catalyst particles in a...
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7452838 |
Controlling temperature in catalyst regenerators
This invention relates to efficiently regenerating catalyst particles by minimizing the formation of localized “hot spots” and “cold spots” in a regeneration zone. In one embodiment, the inventi...
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7419929 |
Critical phase alkylation process
A process for the production of ethylbenzene by the ethylation of benzene in the critical phase over a molecular sieve aromatic alkylation catalyst comprising cerium-promoted zeolite beta. An...
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7217401 |
Mercury removal from activated carbon and/or fly ash
A method for reducing the amount of mercury affixed to a sorbent and/or fly ash is disclosed. The method includes the steps of providing an amount of sorbent and/or fly ash wherein at least a...
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7199069 |
Method for destruction of organic compounds by co-oxidation with activated carbon
A method for oxidizing carbon adsorbable organic compounds in a controlled manner within a bed of activated carbon. The bed of activated carbon is exposed to a source of molecular oxygen, such as...
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7172685 |
Desulfurization system with novel sorbent transfer mechanism
A hydrocarbon desulfurization system employing regenerable solid sorbent particulates in a fluidized bed desulfurization reactor. The sulfur-loaded sorbent particulates are continuously withdrawn...
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7148171 |
Method for adding heat to a reactor system used to convert oxygenates to olefins
The present invention provides a method for adding heat to a reactor system used to convert oxygenates to olefin, in which supplemental heat is added with a heating fuel, e.g., a torch oil, having...
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7053260 |
Reducing temperature differences within the regenerator of an oxygenate to olefin process
The present invention provides a process for making an olefin product from an oxygenate feedstock which comprises: a) contacting the feedstock in a reaction zone with a catalyst comprising i) a...
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7026262 |
Apparatus and process for regenerating catalyst
Disclosed is an apparatus and process for prolonging the residence time of catalyst in a chamber for regenerating catalyst. Spent catalyst, perhaps from an FCC reactor, is introduced into a chamber...
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6827908 |
Standpipe inlet for enhancing particulate solids circulation for petrochemical and other processes
In a fluid catalytic cracking (FCC) unit, a regenerator, a stripper or a withdrawal well connecting to either of the vessels, includes a standpipe for circulating catalyst from one vessel to...
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6776607 |
Process for minimizing afterburn in a FCC regenerator
The invention relates to a process and apparatus for controlling afterburning in the regenerator of a FCC unit. The process and apparatus inject steam into the dilute phase within a regenerator to...
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6635795 |
Desulfurization with improved sorbent regeneration
While contacting under regeneration conditions an oxygen-containing stream with a sorbent comprising a promoter metal and zinc sulfide which has been sulfurized by contact with sulfur-containing...
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6610255 |
Vanadium removal in FCC by use of an outboard vessel
A fluid catalytic cracking (FCC) process performed in a FCC process unit containing a reactor, a regenerator and an outboard vessel. Catalyst particles containing vanadium are circulated back and...
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6602476 |
Apparatus and process for heat exchange with fluid beds
Apparatus and process for heat exchange with fluid beds comprises heat-exchange tubes located longitudinally with respect to the axis of a fluidization zone with a rectangular pitch, one side of...
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6579820 |
Reactor modifications for NOx reduction from a fluid catalytic cracking regeneration vessel
A process for regenerating a spent catalyst having coke deposits thereon in a catalyst regeneration vessel having a dense phase and a dilute phase, wherein the process comprises the steps of: (a)...
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6566539 |
Catalyst regeneration by treatment with an oxidizing agent
A process for the production of tetrahydrofuran, gamma butyrolactone, 1,4-butane diol and the like from a hydrogenatable precursor such as maleic acid, succinic acid, corresponding esters and their...
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RE37842 |
Regenerating zeolitic cracking catalyst
A method for countering the adverse effect of contaminating metals on a cystalline aluminosilicate catalyst comprising contacting the catalyst with a metallic passivating agent to effect some...
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6403515 |
Process for treating a catalyst or an adsorbent in a fluidized bed
The invention concerns a process for fluidising a catalyst or an adsorbent in a furnace which is fixed but the fluidised bed advances, optionally with rotation, in the presence of another inert...
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6114265 |
Combustion control in a fluid catalytic cracking regenerator
Disclosed is a process for controlling combustion in a fluid catalytic cracking regenerator. More specifically, afterburning which occurs during the combustion process is controlled by adjusting...
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6083862 |
Cyclic process for oxidation of calcium sulfide
Calcium sulfide particles in mixtures with carbon particles, as in coal gasifier waste, are converted to calcium oxide by repeated cycles of oxidation and reduction by utilizing the carbon as a...
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5908804 |
Reduction of emissions from FCC regenerators
Coke is burned in the regenerator vessel of an FCC complex with a combustion medium consisting of a diluent gas, such as air, enriched with oxygen, The regenerator is operated in partial combustion...
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5863851 |
Combustion catalysts containing binary oxides and processes using the same
A catalyst composition containing one or more binary oxides of palladium and rare earth metal such as Ce, La, Nd, Pr and/or Sm. The catalyst composition is used for the catalytic combustion of...
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5858207 |
FCC process with combined regenerator stripper and catalyst blending
An FCC arrangement uses a regenerator stripper vessel for removing CO and light hydrocarbons upstream of the regeneration zone that can operate with backmix addition of regenerated catalyst...
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5854161 |
Process for the regeneration of a catalyst
A process is provided for the regeneration of a vanadium-phosphorus oxide catalyst which has been used in a process for the preparation of maleic anhydride by oxidizing butane. The used catalyst...
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5837637 |
Catalyst regeneration
The present invention provides a process for continuously regenerating a catalyst or an adsorbent which comprises the steps of:(a) establishing an ebullating or expanded bed by passing a gaseous...
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5827793 |
Controlled FCC catalyst regeneration using a distributed air system
Spent FCC catalyst is regenerated under net reducing conditions in a regenerator to minimize the migration of vanadium on the spent FCC catalyst particles. Reducing conditions in at least the...
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5773378 |
Spent catalyst distribution
A regenerator in a FCC unit, with the reactor elevated above the regenerator and a side entry spent catalyst introduction to the regenerator, is modified by installing a spent catalyst distribution...
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5773379 |
Thermal regulation process for a solid in a heat exchanger using cylindrical tube surfaces
The invention concerns a process for thermal regulation in a continuous fluidized bed treatment process for a powdered solid, wherein the solid is treated in a fluidized bed treatment zone, at...
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5719093 |
Method and apparatus for desorbing teda and methyl iodine from used teda-impregnated active carbon by utilizing fluidized bed
A method and an apparatus are disclosed for desorbing TEDA by utilizing a fluidized bed so as to reuse a used impregnated active carbon for the purpose of removing toxic materials from a fluid. The...
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5693582 |
Process for catalyst regeneration
A process for regenerating used catalysts having deposited on their surface contaminants comprising carbonaceous and/or sulfur-containing materials which comprises:a) contacting said particles in a...
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5686648 |
Continuous process for the isomerization of olefins with regeneration of the catalyst
Continuous process for the skeletal isomerization of n-olefins containing at the most 20 carbon atoms, in the presence of a catalyst essentially constituted by alumina and titanium, in which a...
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5648585 |
Process for isomerizing linear olefins to isoolefins
This invention relates to a process in which a linear olefin is converted under isomerizing conditions to its corresponding methyl branched isoolefin by contact at a temperature of from 200° C. to ...
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5612003 |
Fluidized bed wtih cyclone
A fluidized bed vessel includes a cyclone which has a leg for returning particulate material to the bed, and an eductor at the bottom of the leg for providing the gas to fluidize the bed and for...
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5578093 |
Fluid bed desulfurization
A method and apparatus for desulfurizing a gas and regenerating a sorbent is disclosed. The sulfur-containing feed gas which can be an effluent gas from a coal gasification reactor, for example, is...
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5565089 |
Process for decoking catalysts
Coke deposits are removed from particulates by combustion in a regenerator by a process in which air is initially used as the oxidant. The combustion gas is subjected to a separation process to...
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