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| Number | Title | Issue Date |
| 4197214 | Crystalline zeolite catalysts of chemical reactions Crystalline zeolite catalysts are stabilized against reducing and moisture containing atmospheres by providing and maintaining substantial metal cationic sites in the zeolite during use in chemical reactions encountering reducing and/or moisture rich atmo... | 04/08/1980 |
| 4190554 | Method for reactivation of platinum group metal catalyst with aqueous alkaline and/or reducing solutions A method for reactivation of a platinum group metal catalyst which comprises treating the platinum group metal catalyst lowered in catalytic activity as the result of having been used for the catalytic reaction of hydrocarbons optionally containing an oxy... | 02/26/1980 |
| 4183823 | Regeneration process for poisoned claus alumina catalyst Poisoned alunina catalyst is removed from the reactor and washed with hot water to remove soluble sulfates. The carbon on the washed catalyst is then burned off and the product may again be washed to remove further sulfates formed during the oxidative bur... | 01/15/1980 |
| 4169042 | Cracking process and catalyst for same containing 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 catalyst are precluded or mitigated by contacting the crack... | 09/25/1979 |
| 4147660 | Method for reactivation of platinum group metal catalyst with aqueous alkaline and/or reducing solutions A method for reactivation of a platinum group metal catalyst which comprises treating the platinum group metal catalyst lowered in catalytic activity as the result of having been used for the catalytic reaction of hydrocarbons optionally containing an oxy... | 04/03/1979 |
| 4147624 | Wastewater treatment with desorbing of an adsorbate from an adsorbent with a solvent in the near critical state An adsorbate is removed from an adsorbent by contacting the adsorbent with a near critical liquid which is a solvent for the adsorbate. The near critical liquid containing the dissolved adsorbate is then subjected to at least partial vaporization to form ... | 04/03/1979 |
| 4124528 | Process for regenerating adsorbents with supercritical fluids An adsorbate is removed from an adsorbent by contacting the adsorbent with a supercritical fluid which is a solvent for the adsorbate. The supercritical fluid containing the dissolved adsorbate is then subjected to a physical treatment which renders the s... | 11/07/1978 |
| 4124692 | Preparation of anhydrous TaF5 Anhydrous TaF5 can be synthesized from a mixture comprising water and fluorotantalic acids by contacting said mixture with a dehydrating agent. Preferably, said mixture is formed by contacting tantalum oxides, tantalum oxide-halides or mixtures... | 11/07/1978 |
| 4105704 | Method for preparing and using a soluble metal pentafluoride-hydrogen fluoride catalyst A soluble HF/TaF5 catalyst is prepared in the absence of an organic solvent according to the steps of: (1) contacting tantalum metal with substantially anhydrous liquid HF to form soluble TaF5, the amount of HF being sufficient to maintai... | 08/08/1978 |
| 4101444 | Catalyst demetallization utilizing a combination of reductive and oxidative washes A process for the removal of metal poisons such as nickel, iron and/or vanadium from a hydrocarbon conversion catalyst which includes the steps of contacting the catalyst with both a reductive wash and a subsequent oxidative wash to remove at least a port... | 07/18/1978 |
| 4098833 | Regeneration of hydrocarbon conversion catalysts Hydrocarbon conversion catalysts comprising a metal halide in combination with a Bronsted acid containing fluorine that have become deactivated or partially deactivated by the formation of allyl and alkylaromatic carbonium ion complexes with the acid duri... | 07/04/1978 |
| 4096199 | Process for regenerating fluorosulfuric acid catalyst A process for regenerating an alkylation catalyst comprising fluorosulfuric acid, said catalyst being at least partially deactivated, which comprises: (1) contacting at least a portion of the fluorosulfuric acid with water to form an acid-water mixture, thereb... | 06/20/1978 |
| 4094889 | Restoring selectivity of alkali metal promoted silver catalysts and production of olefine oxides The selectivity of unstable alkali metal promoted silver containing olefin oxide production catalysts is restored by wetting them.... | 06/13/1978 |
| 4086184 | Reactivation of deactivated hydrocarbon conversion catalyst by ultrasonic insonation Catalysts used in hydrocarbon conversion operations are subject to "permanent" deactivation after successive use and regeneration. These permanently deactivated catalysts can be reactivated by immersing them in a liquid medium and subjecting the liquid me... | 04/25/1978 |
| 4075281 | Purification of carbonate process solutions Present process relates to the purification of carbonate process solution which comprises passing said carbonate process solution through a bed of activated carbon to remove organic contaminants from said solution until the adsorbent capacity of said bed ... | 02/21/1978 |
| 4061566 | Process using a supercritical fluid for regenerating synthetic organic polymeric adsorbents and wastewater treatment embodying the same An adsorbate is removed from a polymeric adsorbent by contacting the adsorbent with a supercritical fluid which is a solvent for the adsorbate. The supercritical fluid containing the dissolved adsorbate is then subjected to a physical treatment which rend... | 12/06/1977 |
| 4058457 | Recovery of activated carbon Activated carbon employed for removing weakly held contaminants such as organic chemicals from water, e.g., drinking water, can be recovered or regenerated by back flushing with iodine in water or an organic solvent and then the iodine recovered by reduci... | 11/15/1977 |
| 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 |
| 4038209 | Catalyst regeneration process An improvement in the method of regenerating catalysts which have become inactive as a result of the accumulation of carbonaceous material on their surfaces during use by contacting them with a free oxygen-containing gas at an elevated temperature to burn... | 07/26/1977 |
| 4033899 | Alkylation fluosulfonic-sulfuric acid catalyst recovery process with silica-alumina removal of fluoride compounds A process for removal of fluoride compounds from spent alkylation catalyst containing fluorosulfonic acid and sulfuric acid wherein said spent catalyst is hydrolyzed in the presence of water, at subatmospheric pressure in a vacuum digestion zone for conve... | 07/05/1977 |
| 4031002 | Passivating metals on cracking catalysts with antimony compounds Metals on a cracking catalyst are passivated by contacting the catalyst with at least one compound selected from the group of compounds having the general formula ##STR1## WHEREIN THE R groups which can be the same or different consist of hydroc... | 06/21/1977 |
| 4018705 | Reactivation of a spent liquid phthalocyanine catalytic composite A spent liquid catalytic phthalocyanine composite is reactivated by a method which comprises percolating said spent liquid phthalocyanine composite through a bed comprising an absorbent compound, recovering the percolated liquid catalytic phthalocyanine c... | 04/19/1977 |
| 4017421 | Wet combustion process Aqueous solutions and suspensions of solid particles, even those containing less than one percent of organic materials, may be combusted with air, oxygen, or their mixtures in a process which provides for preheating in countercurrent batches of the raw or... | 04/12/1977 |
| 4014815 | Removal of carbon and vanadium or lead from spent catalysts by means of controlled high temperature treatment with sulfur The regeneration of spent metal catalysts is accomplished by treatment with a sulfurous atmosphere at a pressure of at least 0.10 atmospheres and at a controlled high temperature of between 400-825° C. (preferably between 400°-715° C., and most prefera... | 03/29/1977 |
| 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 |
| 3962126 | Reactivation of a magnesium oxide catalyst A improved method of reactivating a magnesium oxide catalyst is disclosed which comprises contacting the catalyst with water after heating the catalyst.... | 06/08/1976 |
