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| Number | Title | Issue Date |
| 4861738 | Process for regenerating and stabilizing phosphorus-vanadium-oxygen complex catalysts The present invention relates to a process for the regeneration and stabilization of certain phosphorus-vanadium-oxygen complex catalysts or phosphorus-vanadium-oxygen co-metal complex catalysts, with halogen-containing components and subsequently treatin... | 08/29/1989 |
| 4861484 | Catalytic process for degradation of organic materials in aqueous and organic fluids to produce environmentally compatible products A novel catalytic process is provided for the controlled degradation of organic materials into environmentally compatible products comprising at least carbon dioxide. The process employs a solid catalyst comprising at least one transition element and a pe... | 08/29/1989 |
| 4814305 | Method for regeneration of oxidation catalyst A method for regenerating a phosphorus-, molybdenum- and alkali metal-containing oxidation catalyst spent in the production of an unsaturated carboxylic acid by vapor-phase oxidation of an unsaturated aldehyde, which comprises treating the deactivated cat... | 03/21/1989 |
| 4800186 | Regeneration of fluorocarbonsulfonic acid catalysts A method of regenerating a deactivated fluorocarbonsulfonic acid polymer catalyst by contacting the deactivated catalyst with a solvent combination wherein a first solvent swells the structure of the polymer and the other acts as a diluent to modify the s... | 01/24/1989 |
| 4769127 | Computerized monorail catalyst handling process and system for resid hydrotreating units An improved catalyst handling process and system is provided to safely, effectively, and automatically transport catalyst by remote control to and from resid hydrotreating units. The process and equipment feature computerized monorail equipment for effici... | 09/06/1988 |
| 4743358 | Method for suppressing the harmful effects of metal contaminants on hydrocarbon conversion catalysts using a strontium colloid system A strontium colloid system is introduced into a hydrocarbon conversion process to suppress the harmful effects of one or more metal contaminants in the hydrocarbon feedstock on the active component(s) of the catalyst used in said process. The strontium co... | 05/10/1988 |
| 4680168 | Extraction of Group 8 metals from organic solutions Metals of Group 8 are recovered from an organic medium by liquid-liquid extraction into an aqueous phase in the presence of a water-soluble cyclic phosphite, forming an aqueous extract phase containing the metals in complex combination with the cyclic pho... | 07/14/1987 |
| 4676933 | Method for purification of amido acids A method for purification of C12 -C16 amido acids prepared from C10 -C14 amido acids is disclosed. The amido acids are purificed by dissolving the crude product in organic alcohol solvent and chloroform at a tem... | 06/30/1987 |
| 4529714 | Process for regenerating silver-containing carrier catalysts for the preparation of ethylene oxide The subject invention relates to a process for regenerating silver-containing carrier catalysts used in the preparation of ethylene oxide which comprises treating a deactivated catalyst with a solution comprising a potassium, rubidium, or cesium compound ... | 07/16/1985 |
| 4496665 | Process for cracking high-boiling hydrocarbons using continuous addition of acidity enhancing additives A process for economically converting carbo-metallic oils to lighter products. The carbo-metallic oils contain 650° F.+ material which is characterized by containing material which will not boil below about 1025° F., a carbon residue on pyrolysis of at ... | 01/29/1985 |
| 4476238 | Separation of tars from carbonylation reaction mixtures Tarry residues often are formed in carbonylation reactions, such as those in which esters or ethers are carbonylated to produce ethylidene diacetate or carboxylic acid anhydrides, such as acetic anhydride. Such residues contain Group VIII noble metal cata... | 10/09/1984 |
| 4476237 | Separation of tars from carbonylation reaction mixtures Tarry residues often are formed in carbonylation reactions, such as those in which esters or ethers are carbonylated to produce ethylidene diacetate or carboxylic acid anhydrides, such as acetic anhydride. Such residues contain Group VIII noble metal cata... | 10/09/1984 |
| 4434240 | Recovery of noble metal values from carbonylation residues Heavy residues produced by noble metal catalyzed carbonylation reactions and containing Group VIII noble metals, particularly rhodium, are treated with reagents to precipitate solids containing substantially all of the noble metal contained in the residue... | 02/28/1984 |
| 4422954 | Method to restore the metal content of a noble metal hydrogenation catalyst This invention is a method to restore the metal content of a supported noble metal hydrogenation catalyst comprising adding the appropriate amount of a noble metal salt of a weak acid to a fluid feed passing across the catalyst.... | 12/27/1983 |
| 4388217 | Process for the recovery of catalyst values Disclosed is a process for the recovery of catalyst values from a catalyst-tar solution derived from a production system in which acetic anhydride is prepared by carbonylating methyl acetate in the presence of rhodium, lithium and methyl iodide. The catal... | 06/14/1983 |
| 4374042 | Method of reactivating a catalytic composite of a carrier material and a mercaptan oxidation catalyst A method of reactivating a mercaptan oxidation catalytic composite of an adsorptive support and a metal chelate comprising contacting the composite with an aqueous solution of a quaternary ammonium compound and a linear ionic compound at a temperature of ... | 02/15/1983 |
| 4372875 | Method for obtaining and reusing of oxidation catalyst in the Witten DMT process A process for effecting the recovery and use of a heavy metal oxidation catalyst from a high-boiling distillation residue obtained during the Witten process for the production of dimethyl terephthalate involves the extraction of the high-boiling distillat... | 02/08/1983 |
| 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 and reacting the mixture at high temperature in the presence... | 04/20/1982 |
| 4321128 | Phosphorus passivation process A passivation process for decreasing the poisonous effects from contamination by metals, such as vanadium, iron, nickel or copper that can occur during a catalytic conversion of a hydrocarbon feedstock containing such metals is disclosed. The process empl... | 03/23/1982 |
| 4319057 | Regeneration of molecular sieves Molecular sieves used for dehydration are regenerated with methanol or acetone.... | 03/09/1982 |
| 4283304 | Process for removing triorganophosphine from a liquid composition Process for removing triorganophosphine from a rhodium containing composition or a rhodium containing concentrate thereof.... | 08/11/1981 |
| 4273675 | Process for the preparation of spherical carbon particles and spherical activated carbon particles Disclosed herein is a process for producing spherical carbon particles in which a pitch or a heavy oil of a low softening point is mixed with an organic solvent to reduce the viscosity thereof and is fused and shaped into spherical particles. Added to the... | 06/16/1981 |
| 4259301 | Removal of acidic compounds from gaseous mixtures A method for removing an acidic component from a gaseous mixture by contacting the gaseous mixture in an absorber with an absorbing solution which removes substantial quantities of the acidic component. The gaseous mixture is then passed through an adsorp... | 03/31/1981 |
| 4212728 | Catalytic cracking of hydrocarbons The combustion of carbon monoxide in the regenerator of a fluid catalytic cracking plant is controlled by adding a minute amount of a platinum metal compound or a rhenium compound to the circulating inventory of cracking catalyst during operation of the p... | 07/15/1980 |
| 4186085 | Suspension of powdered carbonaceous adsorbent in a hydrocarbon solvent and its use in waste water treatment A novel composition is formed by suspending a carbonaceous adsorbent in a branched hydrocarbon solvent. In addition, said powdered carbonaceous adsorbent suspended in a hydrocarbon solvent, preferably a branched hydrocarbon solvent, is an effective adsorb... | 01/29/1980 |
| 4146738 | Process for the telomerization or oligomerization of acyclic conjugated diolefins Acyclic conjugated diolefins of 4-6 carbon atoms can be telomerized or oligomerized by themselves or with H-acidic compounds in the presence of an activated palladium (triarylphosphine) catalyst prepared by oxidatative removal of 1-3.5 molar equivalents o... | 03/27/1979 |
| 4038208 | Processes for regenerating dispersions of ligand-stabilized, palladium(II) halide complexes used in carbonylation catalysts This invention concerns processes for regeneration of carbonylation catalysts consisting of dispersions of ligand-stabilized palladium(II) halide complexes in quaternary ammonium, phosphonium and arsonium salts of trihalostannate(II) and trihalogermanate(... | 07/26/1977 |
| 3965036 | Regeneration of activated carbon with a solution of sorbed species in a solvent Solvent regeneration of activated carbon on which a chemical species is sorbed is enhanced by the selective use of a regenerant solution containing a solvent for said chemical species and a predetermined concentration of the chemical species in solution. ... | 06/22/1976 |
