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| Number | Title | Issue Date |
| 7232782 | Regeneration, pretreatment and precipitation of oxides of manganese Methods and systems for regenerating and pretreating oxides of manganese and precipitation of oxides of manganese from manganese salt solutions. The oxides of manganese and manganese salt solutions are processed utilizing heated aqueous oxidizing solutions at or nea... | 06/19/2007 |
| 6878654 | Reactivation of aromatics alkylation catalysts The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an oxygen-containing gas at a temperature of about 120 to about 600° C. and then co... | 04/12/2005 |
| 6797184 | Catalyst for treating waste water, method for preparing the same and process for treating waste water A method is provided for oxidizing and/or decomposing organic and/or inorganic oxidizable substances in waste water by wet oxidation with a use of a catalyst, wherein the oxidizable substances are oxidized and/or decomposed with an oxygen containing gas in the prese... | 09/28/2004 |
| 6531517 | Process for increasing carbon monoxide hydrogenation activity of catalysts via low temperature oxidation with water, steam or mixture thereof A process for increasing the hydrogenation activity, particularly the carbon monoxide hydrogenation activity, of a catalyst or catalyst precursor comprised of a particulate solids support component and a catalytic metal, or metals component, preferably co... | 03/11/2003 |
| 6465529 | Process for increasing cobalt catalyst hydrogenation activity via aqueous low temperature oxidation An aqueous low temperature oxidation (ALTO) process wherein a catalyst or catalyst precursor constituted of a solids support, or powder component, and a metal, or metals component, inclusive of cobalt, is oxidized, reduced and rendered catalytically activ... | 10/15/2002 |
| 6121179 | Supercritical treatment of adsorbent materials Contaminated adsorbent particles, preferably activated carbon particles, are regenerated in water at supercritical conditions. The particles are preferably mixed in water prior to treatment. The mixture is preferably heated to a temperature at least about... | 09/19/2000 |
| 5468701 | Process for regenerating spent acid-activated bentonite clays and smectite catalysts A three step process for regenerating spent bleaching clays and acid-activated smectite catalyst granules includes: (1) an extraction step to remove a majority of entrained oil, preferably about 75% to about 95% by weight of the entrained oil, when regene... | 11/21/1995 |
| 5358915 | Process for regenerating spent acid-activated bentonite clays and smectite catalysts A three step process for regenerating spent bleaching clays and acid-activated smectite catalyst granules includes: (1) an extraction step to remove a majority of entrained oil, preferably about 75% to about 95% by weight of the entrained oil, when regene... | 10/25/1994 |
| 5217935 | Processes for regenerating catalysts contaminated with carbonaceous materials Processes for the regeneration of catalysts, such as hydrogenation catalysts, and the defouling of objects, which are contaminated with carbonaceous deposits. The catalyst or object is contacted with water, oxygen-containing gas, and at least one alkaline... | 06/08/1993 |
| 5087374 | Removal of contaminates from granular solids There is disclosed a method for the removal of impurities, particularly organic impurities from granular solids, having its greatest immediate application for the regeneration of spent adsorbents which are used to purify waste water. The spent activated c... | 02/11/1992 |
| 4952541 | Acrylonitrile dimerization process and method of treating residual catalyst Treatment of dicyanobutene to inactivate residual dimerization catalyst facilitates hydrogenation of the product to form adiponitrile.... | 08/28/1990 |
| 4816134 | Passivation of metal contaminated cracking catalysts This invention provides a nozzle for discharging a relatively small amount of a metals passivating agent into a catalytic cracking unit at a relatively high velocity through a relatively large diameter opening. This invention further provides a process fo... | 03/28/1989 |
| 4629606 | Recovery of tungsten compounds The present invention provides a process for recovering a tungsten compound from a waste liquor containing a high-boiling organic compound and the tungsten compound, which process comprises the steps of spray-burning said waste liquor at an air ratio of 1... | 12/16/1986 |
| 4532111 | Recovery of catalysts as W, Mo or Ru oxychlorides in liquid phase chlorination of pyiridine compounds Metal chloride catalysts employed in liquid phase chlorination reactions are recovered by treating the reaction mass with oxygen or air to form solid metal oxychloride compounds which can be separated and reused.... | 07/30/1985 |
| 4506032 | Dehydrogenation catalyst composition This invention relates to a new catalyst for converting hydrocarbons. The catalyst comprises a platinum group component, a Group IVA component, especially tin, an alkali or alkaline earth component, more than 0.2 weight %, calculated on an elemental basis... | 03/19/1985 |
| 4208380 | Process for the recovery of cobalt from its impure, aqueous, in particular nickel-bearing, solutions and catalyst therefor Cobalt is recovered as a finely-divided and anhydrous salt from impure, nickel-bearing, aqueous solutions of cobalt, by exposing the aqueous solution to oxidation at an elevated temperature in the presence of ammonia and the respective ammonium salt, the ... | 06/17/1980 |
| 4123500 | Recovery of precious metals by oxidation in the aqueous phase of associated carbonaceous support material This invention relates to the recovery of precious metals. More particularly, the invention relates to a process for the recovery of a catalytic metal from a carbonaceous residue or support comprising subjecting an aqueous slurry of material containing ca... | 10/31/1978 |
| 4101635 | Method for regenerating and recycling catalyst for oxidation of sulfur dioxide In a method for oxidizing sulfur dioxide by contacting a sulfur dioxide-containing gas and an oxygen-containing gas with an aqueous solution containing pentavalent vanadium and divalent manganese as a catalyst, the method for regenerating and recycling th... | 07/18/1978 |
