Matches 101 - 150 out of 168 < 1 2 3 4 >
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5371052 Process for recovering boron trifluoride  
There is provided a process for recovering boron trifluoride catalyst from an oligomerization mixture, which comprises introducing an oligomerization mixture containing catalyst comprising boron...
5349116 Alkane alkylation and catalyst therefor  
A composition of matter comprises trifluorometbanesulfonic acid and a solid inorganic material which contains aluminum borate and aluminum oxide, This composition is used as a catalyst for...
5290741 Methods of preserving, storing, and using hydroxylamine production catalyst  
This invention relates to methods of preserving, storing, and using hydroxylamine production catalyst and, more particularly, to methods of preparing, storing, and using such catalyst in...
5290742 Methods of preserving, storing, and using certain carbon supported platinum catalysts  
This invention relates to methods of preserving, storing, and using hydroxylamine production catalyst and, more particularly, to methods of preparing, storing, and using such catalyst in...
5250483 Method for treatment of catalysts using denitrifying bacteria  
A method of releasing metals from catalysts in a form that is readily recoverable using denitrifying bacteria is disclosed. The method can be used to regenerate catalysts and to recover metals from...
5204070 Reactor for processing a catalyst material  
A reactor for processing a catalyst material comprises a reaction chamber including a support for the catalyst material. A laser radiation entry means, a gas inlet and an exhaust are provided, each...
5182030 Regeneration of adsorbents using advanced oxidation  
The present invention is a method of purifying fluid having organic material. The method comprises two operational steps. The first step includes passing the fluid through an adsorbent such that...
5160586 Ozone decomposing reactor  
There is disclosed an ozone decomposing reactor which comprises: a catalyst structure composed of a carrier having at least one passage extending therethrough for allowing an ozone containing...
5124291 Method for deagglomerating and re-exposing catalyst in a fluid bed reactor  
A fluid bed catalyst which has lost activity or fluidization quality through agglomeration, contamination, or a physical or chemical change on the surface of the catalyst is deagglomerated and/or...
5120897 Isoparaffin/olefin alkylation  
The present invention provides a Lewis acid-catalyzed isoparaffin/olefin alkylation process in which acid consumption and energy costs are decreased by employing an acid sorption stage to separate...
5036031 Metal plated microsphere catalyst  
Cross-linked polymer microspheres are carefully separated into fractions of equal size and density by first using sieves and then using hydraulic separation in a cone. Each fraction is separately...
5015611 Water regeneration of deactivated catalyst  
A catalyst useful for promoting the conversion of organonitrogen and organosulfur compounds in a hydrocarbon-containing feedstock is regenerated in a method wherein a deactivated catalyst is...
4988652 Process for recovering catalyst for use in preparing α-(4-isobutylphenyl)propionic acid  
An efficient process for recovering a catalyst used in the preparation of α-(4-isobutylphenyl)propionic acid, which comprises recovering part of a nickel catalyst component, such as nickel...
4985133 Reducing NO.sub.x emissions from FCC regenerators by segregated cracking of feed  
A fluidized catalytic cracking process using a riser reactor to crack a mixture of high and low nitrogen content fresh feeds is operated to reduce NO x emissions in the regenerator flue gas....
4900713 Stabilizing spent hydrotreating catalyst for reprocessing or storage  
A method of stabilizing pyrophoric hydrotreating catalyst drums has been discovered. The dry catalyst is introduced into drums which have been purged with an inert gas such as nitrogen or carbon...
4888316 Preparation of hydrotreating catalyst from spent catalyst  
An active hydrotreating catalyst composition is prepared by a process comprising the steps of (a) grinding a spent hydrotreating catalyst containing carbonaceous deposits, (b) mixing the ground...
4828802 Method of FCCU spent catalyst regeneration and extension tube means  
A method for supplying spent catalyst to a catalyst regenerator comprises (1) guiding the flow of spent catalyst from the lower end of a spent catalyst standpipe downwardly therefrom and (2)...
4812429 Method for cleaning waste gas denitrating catalyst  
In a reaction device in which catalyst layers having vertical passages for a waste gas are arranged, gas rectifying plates are disposed at regular intervals above the catalyst layers and these...
4789528 Technique for sequential rotation of reactors in a multi-reactor catalytic conversion system  
A multi-reactor hydrocarbon catalytic conversion system includes at least three reactors, a feed source for providing hydrocarbon feed to the reactors and apparatus for sequentially backwardly...
4758252 Hydrostatic method employing PSA vent gas pressure for vacuum regeneration  
This invention relates to an energy efficient method of vacuum regenerating an adsorbent bed. In a typical process, the adsorbent bed undergoes an adsorption step, a vent step, and a vacuum purge...
4757038 Regeneration of iron-antimony metallic oxide catalysts  
Iron-antimony metallic oxide catalysts which have become deactivated after being used for the production of aldehydes, acids, nitriles, or dienes through oxidation, ammoxidation, or oxidative...
4753907 Fluid particle material regeneration method and apparatus  
Solids e.g. catalysts are separated from suspensions in gases e.g. products from catalytic cracking of crude oil fractions a discharging of suspensions against a surface positioned above the outlet...
4749467 Lube dewaxing method for extension of cycle length  
An improved method which provides for an extended cycle length in catalytic lube dewaxing of residual lube oil feedstocks and easier catalyst regeneration. The method may incorporate catalytically...
4729975 Method for regenerating a denitration catalyst for exhaust gases from coal-burning apparatus  
A method for regenerating a denitration catalyst for exhaust gases discharged from coal-burning apparatus, in which a used catalyst whose denitration performance has lowered is contacted with...
4729821 In situ activation of catalysts by applied electrical potentials  
A new method is described for the in situ activation of catalysts. Conductive catalysts or catalyst compositions are treated by applying a relatively high (up to 3,000 vdc), substantially...
4721826 Process for restoring or maintaining the activity of heterogeneous catalysts for reactions at normal and low pressures  
By the process of the present invention the activity of heterogeneous catalysts for reactions at normal and low pressures is restored or maintained. These catalysts can lose their activity as a...
4618702 Manufacture of butanedicarboxylic acid esters  
Increased catalyst concentration relative to butadiene in its carboalkoxylation permits operation at reduced pressure and simplifies process steps.
4536483 Process for regeneration of iron-antimony metallic oxide catalysts  
Iron-antimony metallic oxide catalysts which have become deactivated after being used for the production of aldehydes, acids, nitriles, or dienes through oxidation, ammoxidation, or oxidative...
4495064 Metal passivation additive employed in a cracking process  
A process for passivating metals in a cracking operation comprising treating the cracking catalyst with antimony tris(hydroxy-hydrocarbylthiolate).
4454366 Method of recovering and recycling boron trifluoride catalyst  
Spent boron trifluoride catalyst is removed from organic liquids by contacting the liquid with polyvinyl alcohol. For example, boron trifluoride catalyst is removed from 1-olefin oligomer product...
4446074 Preparation of rhodium complex compounds  
Process for preparing hydridocarbonyltris(triorganophosphorus) rhodium compounds.
4430199 Passivation of contaminant metals on cracking catalysts by phosphorus addition  
High gas and coke make due to contamination of a zeolitic fluid cracking catalyst by metal species such as nickel and vanadium during a cracking process is reduced by adding a phosphorus compound...
4421672 Method of cyclic desorption of adsorption media loaded with adsorbates  
A method of cyclic desorption of adsorption agents cyclically loaded with adsorbates is performed in two phases in which a mixture of a desorption vapor and an adsorption vapor is guided over an...
4409122 Catalyst reactivation  
A process for the reactivation of spent tellurium-containing oxidic catalysts (suitable for oxidation, ammoxidation and/or oxidative dehydrogenation of olefines), wherein a solid particulate...
4387247 Catalytic reduction of nitro aromatic compounds with hydrogen sulfide and carbon monoxide  
In the reduction of di- or polynitro aromatic compounds by gaseous H 2 S over a solid catalyst, addition of CO gas promotes formation of amino groups from all nitro groups in the molecule. A...
4372841 Process for reducing coke formation in heavy feed catalytic cracking  
A method for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone is disclosed, where the feedstock contains at...
4372840 Process for reducing coke formation in heavy feed catalytic cracking  
A method for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone is disclosed, where the feedstock contains at...
4325809 Hydrocarbon processing  
Metals deposited on an inert contact material during high temperature decarbonizing and demetallizing of heavy petroleum stocks are inactivated by mixing the contact material with a silica donor...
4306086 Hydroformylation catalyst system and processes  
This invention relates to a catalyst system for the hydroformylation of propene consisting essentially of a catalytic complex of rhodium, carbon monoxide, and a triarylphosphine, and a cobalt...
4264433 Passivating metals on cracking catalysts by indium antimonide  
Contaminating metals on a clay based cracking catalyst are passivated by contacting the catalyst with indium antimonide under elevated temperature conditions.
4263130 Process for cracking hydrocarbons with a catalyst passivated with an antimony tris (hydrocarbyl sulfide)  
A hydrocarbon cracking process employing a catalyst treated with an antimony tris (hydrocarbyl sulfide) to passivate thereon contaminating metals, e.g., vanadium iron, and/or nickel is disclosed....
4257876 Passivation of metals contaminating a cracking catalyst with trihydrocarbylantimony oxide and process for converting hydrocarbons  
A cracking catalyst is treated with a trihydrocarbylantimony oxide to passivate contaminating metals whenever these metals have been deposited on the catalyst. Unused or used catalyst can be...
4256564 Cracking process and catalyst for same containing indium to passivate contaminating metals  
A novel cracking catalyst, a method of preparing same, and an improved hydrocarbon cracking process are provided wherein the adverse effects of metals such as nickel, vanadium, iron, copper, and...
4238367 Passivation of metals on cracking catalyst with thallium  
A hydrocarbon cracking catalyst is treated with thallium to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or unused catalysts can be treated.
4218337 Passivating metals on cracking catalysts with tellurium  
A novel cracking catalyst, a method of preparing same and an improved hydrocarbon cracking process are provided wherein adverse effects of metals such as nickel, vanadium and iron in the cracking...
4217191 Process for regenerating contaminated activated carbon  
Process for regenerating activated carbon particles contaminated by oxidizable impurities. An electrolysis cell is divided by a liquid-permeable membrane to define an anodic chamber and a cathode...
4208302 Passivating metals on cracking catalysts  
Contaminating metals on a clay based cracking catalyst are passivated by contacting the catalyst with indium antimonide under elevated temperature conditions.
4207204 Passivation of metals on cracking catalyst with a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate)  
A hydrocarbon cracking catalyst is treated with a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate) to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or...
4193891 Passivation of metals on cracking catalyst with an antimony thiocarbamate  
A hydrocarbon cracking catalyst is treated with an antimony thiocarbamate to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or unused catalyst can be treated.
4192770 Cracking catalyst restoration with boron compounds  
A process for restoring selectivity of cracking catalysts which are contaminated with metals during cracking operations which comprises contacting the catalyst with at least one boron compound for...
Matches 101 - 150 out of 168 < 1 2 3 4 >