Abstract: 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 sub-troughs, and downflow tubes extending downward from the bottom of the main trough and sub-troughs.

Abstract: The athermal sorbent bed regeneration system of the present invention includes a main fuel supply, at least one sorbent bed, a source of microwave energy, and a secondary fuel supply. The main fuel supply has a first concentration of an impurity and the secondary fuel supply has a second concentration of the impurity that is less than the first concentration of the impurity. The sorbent bed adsorbs the impurity. The microwave energy source regenerates the sorbent bed for reuse.

Abstract: In one exemplary embodiment, a process for regenerating a hydrocarbon conversion catalyst for a hydrocarbon conversion zone can generally include passing the hydrocarbon conversion catalyst through, sequentially, a catalyst-disengaging zone having a first atmosphere, an adsorption zone having a second atmosphere, and a regeneration zone including a combustion zone; introducing an inert gas between the first atmosphere and the second atmosphere; and passing a flue gas from the combustion zone to the adsorption zone.

Abstract: A catalytic reforming process including a reaction zone and a separate catalyst regeneration zone where catalyst is collected in a catalyst collector in the reaction zone and then directed to the catalyst regeneration zone wherein the catalyst collector is purged with a net gas stream.

Abstract: A process is disclosed for regenerating a used catalyst comprising two or more noble metals supported on a carrier. The method comprises calcining a used catalyst comprising a noble metal and a transition metal supported on an inorganic carrier in an oxygen-containing gas to produce a calcined catalyst; and contacting the calcined catalyst with a hydrogen-containing gas at a temperature higher than 430° C.

Abstract: Systems and processes are provided that relate to the recovery of sorbates in processes utilizing temperature controlled adsorption. Sorbate recovery can include providing a temperature controlled adsorber that is undergoing a regeneration cycle after undergoing an adsorption cycle. The temperature controlled adsorber can have one or more adsorption flow passages and one or more heat transfer flow passages. The one or more adsorption flow passages can contain an adsorptive material coating with a sorbate adsorbed thereto. A heating fluid can be provided to the one or more heat transfer flow passages of the temperature controlled adsorber. A regeneration stream can be provided to the one or more adsorption flow passages of the temperature controlled adsorber. The adsorptive material coating can be regenerated by removing the sorbate from the temperature controlled adsorber to produce a regeneration effluent stream.

Abstract: Disclosed is a process for combusting dry gas to heat the air supplied to an FCC regenerator to increase its temperature and minimize production of undesirable combustion products. Preferably, the dry gas is a selected FCC product gas. Alternatively or additionally, dry gas from an FCC product stream is separated and delivered to an expander to recover power before combustion.

Abstract: The present invention is directed to a novel metal-promoted zeolite catalyst, a method of producing the catalyst and a method of using the catalyst for the selective catalytic reduction of NOx with improved hydrothermal durability. The novel metal-promoted zeolite is formed from a low sodium zeolite and is hydrothermally treated after metal ion-exchange.

Abstract: A process is disclosed for the regeneration of a deactivated wax covered Fischer-Tropsch catalyst, a pumpable suspension of deactivated catalyst being injected into a hot gas stream and the regenerated catalyst then being separated off from the gas stream, optionally further treated by calcination and/or reduction.

Abstract: A process for stripping gases from catalyst material in which catalyst travels down baffles at a first acute angle and then at a second acute angle on the same baffle. Traveling down the baffle at the second angle assures the catalyst will cross a downcomer channel and land on an adjacent baffle.

Abstract: 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 oxide-rich environment unexpectedly reduces the in situ silicate formation rate, as compared to similar sorbents regenerated using conventional methods.

Abstract: A method and a device for the regeneration of a particle filter, especially a diesel particle filter, arranged in the exhaust gas train of an internal combustion engine, wherein an exhaust gas stream to be cleaned is supplied to the at least one particle filter. The exhaust gas stream supplied to the at least one particle filter is a raw exhaust gas stream of the internal combustion engine, into which, during regeneration mode, a heated exhaust gas stream at a higher temperature than the raw exhaust gas stream is mixed at a point upstream of the particle filter under the control of at least one open-loop and/or closed-loop control device, which actuates a throttle device and/or shut-off device in accordance with predetermined regeneration parameters.

Abstract: 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 to different regions of a dense phase catalyst zone at the lower end of the regenerator such as a high velocity central region and a low velocity annular zone are formed, positioned below a common dilute catalyst phase.

Abstract: Carbon monoxide is removed from material streams by adsorption to an adsorption composition comprising oxides of copper, zinc and aluminum, the copper-comprising fraction of which has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at most 60%.

Abstract: The present invention relates to a method of regenerating a ruthenium catalyst for the hydrogenation of phthalates, which comprises flushing the catalyst with inert gas in a regeneration step until the original activity or part of the original activity has been attained.

Abstract: A method of reclaiming a titanosilicate from a deactivated or spent oxidation catalyst containing a titanosilicate having deposited thereon one or more catalytic metals, such as gold, and optionally, one or more promoter metals, the method involving treating the deactivated catalyst with an oxidant; contacting the oxidant-treated catalyst with acid, preferably aqua regia; washing the titanosilicate to remove residual acid; and optionally drying and/or calcining. A method of reconstituting an active oxidation catalyst from a spent or deactivated oxidation catalyst, the method involving reclaiming the titanosilicate as noted above, and then depositing one or more catalytic metals and, optionally, one or more promoter metals onto the reclaimed titanosilicate.

Abstract: A process for regenerating a hydrogenation catalyst which has been used in a gas-phase hydrogenation, which comprises stripping at from 50 to 300° C. with a substance or a substance mixture which under the process conditions has no oxidizing action and is present in the gaseous state is described.

Abstract: Carbon monoxide is removed from streams by adsorption on an adsorption composition which comprises copper and zirconium oxides but no zinc oxide, which comprises from 70 to 99.8% by weight of copper oxide and from 0.2 to 30% by weight of zirconium oxide, based on the total amount of the adsorption composition.

Abstract: New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature is followed by a first hold period before heating to a higher second temperature and maintaining the second temperature for a second hold period. In one aspect, the overall activation process takes less than 10 hours.

Abstract: A gas stream containing e.g. molecular hydrogen is used for the regeneration of a catalyst for NOx and SO2 removal from the flue gas of a gas turbine. In order to reduce the consumption of regeneration gas, the gas inlet is located between the SCOSOx catalyst (2) and the SCONOx catalyst (3). The regeneration gas leaves the catalyst chamber upstream of the SCOSOx catalyst and is recycled. For the regeneration of the SCONOx catalyst and to keep SO2 containing gas from entering the SCONOx catalyst, a second regeneration gas inlet is located downstream of the SCONOx catalyst. The regeneration gas entering the catalyst chamber through this port passes the SCONOx (3) and the SCOSOx catalyst (2). The direction of the flow in the SCONOx catalyst can also be reversed. In another example, regeneration gas outlets are located both upstream of the SCOSOx and downstream of the SCONOx catalyst. But, only the regeneration gas from the SCONOx catalyst is recycled.

Abstract: An apparatus and method for adding an alkali metal promoter into steam and contacting the solution with a dehydrogenation catalyst during a dehydrogenation reaction is disclosed. The apparatus has a first conduit capable of transporting an alkali metal salt solution and a second conduit in fluid communication with the first conduit, the second conduit capable of transporting steam so that the alkali metal salt is dissipated into the steam prior to entry into a dehydrogenation reaction zone.

Abstract: The present patent application describes a method of regenerating a ruthenium catalyst for the hydrogenation of benzene, which comprises flushing the catalyst with inert gas in a regeneration step until the original activity or part of the original activity has been attained.

Abstract: An in-situ method for regenerating a deactivated catalyst removes a calcium sulfate layer masking active catalyst sites. A reducing agent converts the calcium sulfate to calcium oxide, which is then removed, by reintrainment into the flue gas steam using soot blowers or sonic horns. The method is particularly useful for regenerating selective catalytic reduction (SCR) catalysts used to remove nitrogen oxides from flue gas produced by combustion of coal from the Powder River Basin. The method can be practiced using existing SCR system hardware, and without removing the SCR system from service.

Abstract: A process and device for purifying flue gases in refuse incineration plants during regeneration of a catalyst which serves for reducing nitrogen oxides, by, in a first step, removing acidic pollutant gases from the flue gas in a wet or dry manner, in a second step adding ammonia for reducing nitrogen oxides to the flue gas purified in the first step, in a third step feeding the flue gas admixed with the ammonia to a catalyst, where the catalyst is heated at a controlled heat-up rate for regeneration, which leads to liberation of ammonia, where the amount of ammonia added in the second step and the heat-up rate in the third step are controlled by the amount of a pollutant gas selected from the group of ammonia, and which the purified flue gas contains.

Abstract: Provided is a method of regenerating a honeycomb type SCR catalyst which is used in selective catalytic reduction (SCR), comprising treating a waste honeycomb type SCR catalyst used in an industrial boiler with a mixed solution containing 0.1 M to 1.0 M H2SO4, 0.005 M to 0.1 M NH4VO3 and 0.005 M to 0.1 M 5(NH4)2O.12WO3.5H2O in an air lift loop reactor.

Abstract: A method of operating a continuous system for a catalyst regeneration process wherein the regeneration section includes a combustion zone, at least one oxygen boost zone, a halogenation zone and a drying zone in serial progression.

Abstract: Treatment at elevated temperature and advantageously superatmospheric pressure with an inert gas, especially nitrogen, rejuvenates molecular sieve catalysts deactivated by use in liquid-phase or supercritical or dense-phase olefin oligomerization, or by use in aromatic alkylation.

Abstract: The current invention provides methods and apparatus for integrating a high temperature waste heat recovery system with a chemical or refining process which requires heat energy at a temperature less than the operational temperature of the waste heat recovery system. Additionally, the current invention provides methods and apparatus suitable for retrofitting existing process units requiring heat energy at a temperature of T2 with a waste heat recovery system operating at temperature of T1 where T1 is greater than T2.

Abstract: The present invention relates to the regeneration of a SOx removal catalyst (14) and a NOx reducing catalyst (12). Additionally, this invention relates to the reduction or elimination of sulfur breakthrough from the SOx removal catalyst (14) to the NOx reducing catalyst (12) that may occur during or after a regeneration sequence.

Abstract: The invention is directed to a method of rejuvenating silicoaluminophosphate molecular sieve catalyst that has been deactivated hydrothermally as well as a method of using the rejuvenated catalyst to make an olefin product from an oxygenate feed. In particular, the invention is directed to rejuvenating the catalyst by contacting it with warm water, ammonium salts, dilute acids or low pressure steam until the catalytic activity level of the catalyst has been increased to the desired extent.

Abstract: The invention is directed to a method of rejuvenating silicoaluminophosphate molecular sieve catalyst that has been deactivated hydrothermally as well as a method of using the rejuvenated catalyst to make an olefin product from an oxygenate feed. In particular, the invention is directed to rejuvenating the catalyst by contacting it with warm water, ammonium salts, dilute acids or low pressure steam until the catalytic activity level of the catalyst has been increased to the desired extent.

Abstract: Provided herein are adsorbents and methods of using the adsorbents to at least partially remove one or more adsorbates. In an aspect, an adsorbate within a phase is at least partially removed by providing an adsorbent material and contacting the adsorbent material with the phase having an adsorbate, to at least partially remove the adsorbate. Various adsorbents are disclosed having the chemical formula RE1-x-y-zBxB?yB?zOw, where RE is RE is a rare earth metal, B is a trivalent metal ion, B? is a transition metal ion or an alkaline earth element, B? is a transition metal ion, 0?x?0.25, 0?y?0.95, 0?z?0.75, w is a number which results in charge balance, and x+y+z<1.

Abstract: Carbon monoxide is removed from streams by adsorption on an adsorption composition which comprises copper, zinc and zirconium oxides and whose copper-comprising component has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 90% and not more than 97%.

Abstract: Carbon monoxide is removed from streams by adsorption on an adsorption composition which comprises copper, zinc and zirconium oxides and whose copper-comprising component has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 45% and not more than 75%.

Abstract: A process and apparatus are disclosed contacting hydrocarbon feed with catalyst in a reactor vessel under conditions more vigorous than bubbling bed conditions and preferably fast fluidized flow conditions. The vigorous conditions assure thorough mixing of catalyst and feed to suppress formation of dry gas and the promotion of hydrogen transfer reactions.

Abstract: A process for the preparation of a catalyst which comprises activating a catalyst precursor comprising a cobalt compound and a support with a gas comprising at least 5 mol % of a hydrocarbon.

Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.

Abstract: Systems and methods are provided for the regeneration of adsorbent medium and the production of additional fatty acid esters, i.e., biofuel, in particular, by means of discharging adsorbed contaminants from an adsorbent medium such as an inorganic catalytic medium by methods that convert the contaminants into additional biofuel or biofuel intermediates, thereby increasing production efficiency, conserving labor, and reducing material waste and environmental contamination.

Abstract: Disclosed herein are sorbents and devices for controlling sulfur oxides emissions as well as systems including such sorbents and devices. Also disclosed are methods for making and using the disclosed sorbents, devices and systems. In one embodiment the disclosed sorbents can be conveniently regenerated, such as under normal exhaust stream from a combustion engine, particularly a diesel engine. Accordingly, also disclosed are combustion vehicles equipped with sulfur dioxide emission control devices.

Abstract: A catalytic additive for reducing NOx, SOx, and/or precursors thereof in a regenerator flue gas comprises an alkaline earth metal, phosphorous, and at least one transition metal on an alumina-based support.

Abstract: A method of converting oxygenate-containing feedstock to light olefins comprises charging a reactor with catalyst, feeding the feedstock into the reactor, contacting the feedstock with the catalyst and converting the feedstock to olefins while depositing byproducts on catalyst resulting in spent catalyst, regenerating the spent catalyst by combustion gases, and stripping the regenerated catalyst of gases entrained in the regenerating step. The stripping step is accomplished using nitrogen gas to strip the entrained gases from the regenerate catalyst. In one embodiment, regenerated catalyst is passed through a regenerated catalyst stripper before it is returned to the reactor.

Abstract: A process for regenerating a catalyst used in the preparation of acrolein from glycerol, which comprises tungsten compounds and has acidic properties and at least one promoter.

Abstract: 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 aromatic feedstock having a benzene content of at least 90 wt. % is supplied into a reaction zone and into contact with the cerium-promoted zeolite beta having a silica/alumina mole ratio within the range of 50-150 and a cerium-aluminum ratio of 0.5-1.5. Ethylene is supplied to the alkylation reaction zone in an amount to provide a benzene/ethylene mole ratio of 1-15. The reaction zone is operated at temperature and pressure conditions in which benzene is in the super critical phase to cause ethylation of the benzene in the presence of the cerium zeolite beta alkylation catalyst. An alkylation product is produced containing ethylbenzene as a primary product with the attendant production of heavier alkylated by-products of no more than 60 wt. % of the ethylbenzene.

Abstract: Finely divided ferrous carbonate absorbent, siderite granules or absorbent particles made by mixing, agglomerating and shaping finely powdered ferrous carbonate, preferably siderite, in combination with minor effective amounts of water or an optional binder, followed by drying, are used to treat and significantly reduce concentrations of hydrogen sulfide, carbonyl sulfide, organic disulfides, mercaptans and other sulfurous compounds and contaminants in gaseous and liquid fluid streams such as natural gas, light hydrocarbon streams, crude oil, acid gas mixtures, carbon dioxide gas and liquid streams, anaerobic gas, landfill gas, geothermal gases and liquids, and the like. Methods for absorbing sulfur compounds in a moist atmospheric environment and for regenerating the absorbent by contacting it with air and steam or, continuously, by mixing the feed stream with moist air are also disclosed.

Abstract: A process for regenerating a catalyst bed deactivated in the course of a heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, in which a gas comprising molecular oxygen is conducted at elevated temperature through the deactivated catalyst bed and, in the course of the regeneration, the content of molecular oxygen in the regeneration gas is increased repeatedly and the increase in the carbon oxide content of the regeneration gas as it flows through the deactivated catalyst bed is restricted to values of ?5% by volume.

Abstract: A process for regeneration of a catalyst that comprises at least one EUO-structural-type zeolite in acid form and at least one hydro-dehydrogenating metal, used in a process for isomerization of a hydrocarbon feedstock that comprises aromatic compounds with eight carbon atoms, comprising at least a) a stage for eliminating a majority of the coke, deposited on said catalyst, by combustion in the presence of a gas that contains oxygen at a temperature that is less than or equal to 600° C., and b) a stage for oxychlorination of the product that is obtained from stage a), carried out between 200 and 550° C. in the presence of at least one gas mixture that contains at least oxygen, water and chlorine and/or at least one chlorinated compound, is described.

Abstract: Processes are disclosure which comprise alternately contacting an oxygen-carrying catalyst with a reducing substance, or a lower partial pressure of an oxidizing gas, and then with the oxidizing gas or a higher partial pressure of the oxidizing gas, whereby the catalyst is alternately reduced and then regenerated to an oxygenated state. In certain embodiments, the oxygen-carrying catalyst comprises at least one metal oxide-containing material containing a composition having one of the following formulas: (a) CexByB?zB?O?, wherein B=Ba, Sr, Ca, or Zr; B?=Mn, Co, or Fe; B?=Cu; 0.01<x<0.99; 0<y<0.6; 0<z<0.5; and 1<?<2.2; (b) SrvLawBxB?yB?zO?, wherein B=Co or Fe; B?=Al or Ga; B?=Cu; 0.01<v<1.4; 0.1<w<1.6; 0.1<x<1.9; 0.1<y<0.9; 0<z<2.2; and 3<?<5.5).

Abstract: In one exemplary embodiment, a process for regenerating a hydrocarbon conversion catalyst for a hydrocarbon conversion zone can generally include passing the hydrocarbon conversion catalyst through, sequentially, a catalyst-disengaging zone having a first atmosphere, an adsorption zone having a second atmosphere, and a regeneration zone including a combustion zone; introducing an inert gas between the first atmosphere and the second atmosphere; and passing a flue gas from the combustion zone to the adsorption zone.

Abstract: Hydrogenated vegetable oil exhibiting superior thermal stability and containing reduced levels of saturates and trans fatty acids are produced using an activated hydrogenation catalyst and/or an improved hydrogenation process incorporating high shear. The use of a high shear mechanical device incorporated into the hydrogenation process as a reactor device is shown to be capable of enabling reactions that would normally not be feasible under a given set of reaction pressure and temperature conditions. For example, the hydrogenation process described herein enables a reduction of hydrogenation time, and operation at lower temperatures than current processes. The resulting hydrogenated vegetable oil is particularly useful in frying, confectionery baking, and other applications where a product with a low trans fat content or higher thermal stability is desirable. The hydrogenated oil produced may comprise less than 10 weight % of trans fatty acids with less than 5 weight % of linolenic acid (C18:3).

Abstract: A method of rejuvenating a deactivated molecular sieve catalyst, deactivated by use in an olefin oligomerization or aromatics alkylation process, which method comprises contacting the deactivated catalyst with a stream of rejuvenation gas comprising a hydrocarbon product fraction from the process at an elevated temperature and pressure for a time sufficient to effect an increase in catalytic activity of the deactivated catalyst.