Quotables
"During my service in the United States Congress, I took the initiative in creating the Internet."
Al Gore ; The basis for the later misquote by US Republicans that Gore had "invented" the Internet. Gore was the leading political champion of the modern-day Internet.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6733564 | Process for recovery of nickel from spent catalyst The present invention relates to a process for recovery of nickel and alumina from spent catalyst by direct leaching with sulphuric acid in presence of small amount of an additive. The invention is useful for recovery of both nickel and sources of nickel and therefo... | 05/11/2004 |
| 6153155 | Recovery of the transition metal component of catalyst used in heavy feed hydroconversion The invention relates to a process for recovering the transition metal component of catalysts used in the hydroconversion of heavy hydrocarbonaceous materials. In accordance with the invention, a slurry of a transition metal catalyst and hydrocarbon is ca... | 11/28/2000 |
| 5702500 | Integrated process for the recovery of metals and fused alumina from spent catalysts An integrated process for the treatment of spent catalysts containing mainly molybdenum, vanadium, nickel, cobalt and, alumina to produce ammonium metavanadate, vanadium pentoxide, molybdic trioxide, fused alumina and a high grade nickel/cobalt alloy esse... | 12/30/1997 |
| 5431892 | Process for recovering valuable metal from waste catalyst A process for recovering valuable metals from a waste catalyst based on an alumina carrier includes (a) roasting the waste catalyst at a temperature range of 400° to 1,000° C. to obtain a roasted product; (b) preparing a reduction dissolution by dissolv... | 07/11/1995 |
| 5415849 | Process for dissolving used catalyst A process for dissolving used catalyst includes the steps of roasting, after subjecting to an optional deoiling treatment, the used catalyst at a temperature lower than 1,000° C. but not lower than the temperature at which any of the residual components ... | 05/16/1995 |
| 5399322 | Selective recovery of dissolved metals and preparation of metal salt products Discussed is a process for recovering metals and metal-containing products, such as a nickel sulfate product, from aqueous feed solutions comprising two or more dissolved metals. A selected metal is isolated and in a purified form in an aqueous raffinate ... | 03/21/1995 |
| 4927794 | Leaching cobalt, molybdenum, nickel, and vanadium from spent hydroprocessing catalysts A process is disclosed to extract metal values selected from the group consisting of cobalt, molybdenum, nickel, tungsten, and vanadium from metal-containing particles, such as spent hydroprocessing catalyst particles containing carbon residue. In this pr... | 05/22/1990 |
| 4861565 | Method of separately recovering metal values of petroleum refining catalyst Metal values including those of cobalt, vanadium, aluminum, molybdenum and tungsten are recovered from spent petroleum refining catalyst by acid leaching the metal values except those of molybdenum or tungsten, separating the resulting solution from the l... | 08/29/1989 |
| 4830997 | Process for regenerating used catalysts by means of hydrogen peroxide aqueous solution stabilized with an organic compound The process has as an object the regeneration of catalysts containing at least one contaminating metal of the vanadium, nickel and iron group. The operation is conducted as follows: (a) The catalyst (1) is roasted in the presence of an oxygen-containing gas ... | 05/16/1989 |
| 4795726 | Method for the regeneration of spent alumina-based catalysts Method for the regeneration of spent alumina-based catalysts wherein the catalyst firstly is treated with steam at elevated temperature in order to remove at least part of the sulphur; subsequently with an oxygen-containing gas at elevated temperature, in... | 01/03/1989 |
| 4752332 | Treating manganese-containing ores with a metal sulfide A process for treating a first metal, manganese-containing ore comprising contacting the manganese-containing ore with an aqueous, acidic composition and a material containing at least one metal sulfide at conditions effective to (1) chemically reduce at ... | 06/21/1988 |
| 4721606 | Recovery of metal values from spent catalysts Spent catalysts from hydrocarbon refining processes, comprising transition metal compounds on aluminum oxide-containing supports, are subjected to an oxidative roasting and are treated with sulfuric acid in a counter-current digester to dissolve metals. F... | 01/26/1988 |
| 4714688 | Process for regenerating used catalysts by means of hydrogen peroxide aqueous solution stabilized with an organic compound The process has as an object the regeneration catalysts containing at least one contaminating metal of the vanadium, nickel and iron group. The operation is conducted as follows: (a) The catalyst (1) is roasted in the presence of an oxygen-containing gas ... | 12/22/1987 |
| 4677085 | Process for removing metals from spent catalyst This invention pertains to a new process for removing metals, especially contaminant metals, from spent catalysts. Also, this invention pertains to a catalyst composite with metals removed by the new process, and to several uses for the catalyst, includin... | 06/30/1987 |
| 4670229 | Cyclic process for recovering metal values and alumina from spent catalysts Metal values and alumina are recovered from spent, usually oily, catalysts by oxygen pressure leaching with sodium hydroxide and/or sodium aluminate to dissolve molybdenum, vanadium and/or tungsten and provide a solid, filterable residue containing alumin... | 06/02/1987 |
| 4666685 | Selective extraction of molybdenum and vanadium from spent catalysts by oxidative leaching with sodium aluminate and caustic Spent hydrodesulfurization catalysts containing alumina, at least one metal from the group consisting of molybdenum, tungsten and vanadium and at least one metal from the group consisting of nickel and cobalt, sulfur, and, usually, residual oil are oxygen... | 05/19/1987 |
| 4657745 | Value recovery from spent alumina-base catalyst A process for the recovery of aluminum and at least one other metal selected from the group consisting of molybdenum, nickel and cobalt from a spent hydrogenation catalyst comprising (1) adding about 1 to 3 parts H2 SO4 to each part ... | 04/14/1987 |
| 4615731 | Hydrometallurgical processing of precious metal-containing materials A hydrometallurgical process is provided for separating heavy metal nuisance elements such as As, Sb, Bi, Sn and Pb from precious metals and/or selenium. The process can be used as a step in an overall hydrometallurgical process for treating refinery resi... | 10/07/1986 |
| 4609634 | High efficiency extraction method for recovering oxidation catalyst material from dimethyl terephthalate esterified oxidate residue and the like Disclosed is a highly efficient continuous method for the aqueous extraction of water-soluble oxidation catalyst material from a residue such as that generated in the production of dimethyl terephthalate from p-xylene by the molecular oxygen oxidation and... | 09/02/1986 |
| 4595666 | Catalyst rejuvenation process for removal of metal contaminants Spent catalysts removed from a catalytic hydrogenation process for hydrocarbon feedstocks, and containing carbon undesired metals contaminants deposits, are rejuvenated for reuse. Following solvent washing to remove process oils, the catalyst is treated e... | 06/17/1986 |
| 4585628 | Stripping metals from spent catalysts Spent catalysts are extracted for removal of catalytic metals from inert supports by oxidizing subvalent metals in a solution of a ligand which forms a soluble stable complex with the oxidized metal. The ligands are salts of 1,1-dithiolate, dithiocarbimat... | 04/29/1986 |
| 4554138 | Leaching metals from spent hydroprocessing catalysts with ammonium sulfate A process for enhancing recovery of metals, especially cobalt, from spent hydroprocessing catalysts when the spent catalyst particles are first roasted at between 400° C. and 600° C. and then contacted with a first aqueous solution of ammonia and an amm... | 11/19/1985 |
| 4522928 | Removal of metal comtaminants from catalysts using buffered oxalic acid A process for removing metal contaminants from a hydroconversion catalyst, said catalyst containing at least one metal from Groups VIB, VIIB or VIII supported on a refractory inorganic oxide. The process comprises contacting the contaminated catalyst with... | 06/11/1985 |
| 4514368 | Leaching nickel, cobalt, molybdenum, tungsten, and vanadium from spent hydroprocessing catalysts A process for removing nickel, cobalt, molybdenum, and vanadium from spent hydroprocessing catalyst particles by roasting the catalyst at between 400° C. and 600° C. and leaching the catalyst particles with an aqueous solution of ammonia and an ammonium... | 04/30/1985 |
| 4501820 | Method for the recovery of a tungsten-containing catalyst from coke containing nickel and vanadium A tungsten-containing catalyst associated with coke containing vanadium and nickel is recovered by a method which includes steam gasification, low temperature burning to remove at least a portion of the coke and selective extraction of the nickel and vana... | 02/26/1985 |
| 4500495 | Recovering metals from spent hydroprocessing catalysts A process for recovering the metal values from spent hydroprocessing catalyst particles. The metal values will include at least one metal of Group VIII of the Periodic Table and at least one metal of Group Vb or Group VIb of the Periodic Table. The spent ... | 02/19/1985 |
| 4474735 | Process for the recovery of valuable metals from spent crude-oil sulfur-extraction catalysts A process for the recovery of valuable metals from roasted crude-oil sulfur-extraction catalyst waste is disclosed. In this process the value metals can be separated from aluminum in a single stage by treating the waste at elevated temperature and pressur... | 10/02/1984 |
| 4454240 | Catalyst regeneration process including metal contaminants removal Spent catalysts removed from a catalytic hydrogenation process for hydrocarbon feedstocks, and containing undesired metals contaminants deposits, are regenerated. Following solvent washing to remove process oils, the catalyst is treated either with chemic... | 06/12/1984 |
| 4415541 | Method of recovering nickel from a spent fat hardening catalyst The invention relates to a method of recovering nickel from a spent fat hardening catalyst which consists of finely divided nickel metal on a carrier for example of infusorial earth and/or synthetic material and suspended in fat. The fat is saponified by ... | 11/15/1983 |
| 4409190 | Extracting cobalt from spent hydroprocessing catalysts with cyanide A process is disclosed for recovery of cobalt from spent catalyst particles. The particles are roasted, leached with an ammonia/ammonium salt leach solution and then leached with a cyanide ion leach solution.... | 10/11/1983 |
| 4394355 | Recovery of catalytically-useful cobalt and like metal moieties from their solid oxalates with EDTA salts The solid oxalate of a catalytic metal such as cobalt, typically formed as an undesired and useless by-product during the liquid-phase oxidation of an organic compound, typically a hydrocarbon, in the presence of a homogeneous catalyst comprising said met... | 07/19/1983 |
| 4367215 | Method of acid leaching of silicates A method of leaching of the metal contents in natural silicates by means of mineral acids to produce a metal-containing leaching liquid and a solid residue is disclosed. The silicate is first crushed but the grain size of substantially all of it is kept a... | 01/04/1983 |
| 4293403 | Catalyst demetallization by converting the metal poisons to a sulfur containing metal compound having a defined low amount of sulfur A process for the removal of metal poisons such as nickel, iron and/or vanadium from a hydrocarbon conversion catalyst which includes the step of contacting the catalyst with a sulfur-containing compound to convert at least a portion of the metals on the ... | 10/06/1981 |
| 4292282 | Process for recovering metals from catalysts for the hydrodesulfurization of hydrocarbons This invention relates to the recovery of molybdenum, vanadium, and aluminum, as well as of cobalt and nickel, from the residues of hydrodesulfurization catalysts. PRIOR ART Molybdenum-containing catalysts are used in the petroleum industry for the hydrod... | 09/29/1981 |
| 4289605 | Catalytic cracking of metal contaminated mineral oil fractions Metal contaminated heavy oils such as residual fractions from petroleum distillation are economically converted to gasoline and other light products in catalytic cracking by practice of a novel catalyst makeup policy of adding controlled proportions of bo... | 09/15/1981 |
| 4272400 | Regeneration of spent hydrodesulfurization catalysts employing presulfiding treatment and heteropoly acids The removal of metals, especially vanadium, from spent hydrofining catalyst is accomplished by a two-step process. Treatment with a gaseous sulfur-containing reagent brings the metals to the surface of the catalyst and converts them to sulfides, which are... | 06/09/1981 |
| 4272401 | Regeneration of spent hydrodesulfurization catalyst with heteropoly acids Contacting deactivated hydrodesulfurization catalyst, such as Co-Mo supported on alumina, with a heteropoly acid, such as molybdophosphoric acid or tungstosilicic acid, in pH range of about 1 to 3 and temperature range of about 20° to 80° C., results, b... | 06/09/1981 |
| 4268415 | Regeneration of spent hydrodesulfurization catalysts with heteropoly acids and hydrogen peroxide Contacting deactivated hydrodesulfurization catalyst, such as Co-Mo supported on alumina, with a heteropoly acid, such as molybdophosphoric acid or tungstosilicic acid, to which dilute hydrogen peroxide is added, results in a significant enhancement in th... | 05/19/1981 |
| 4243550 | Catalyst demetallization with a reductive SO2 wash A process for the removal of metal poisons such as nickel, iron and/or vanadium from a hydrocarbon conversion catalyst which includes the step of contacting the catalyst with a reductive wash medium comprising an aqueous, preferably saturated, solution of... | 01/06/1981 |
| 4182747 | Process for preparation of anhydrous metallic chlorides from waste catalysts A process is disclosed for recovering metallic constituents of spent or waste catalysts containing metallic compounds fixed on an aluminous support. The process is particularly applicable for the recovery of metals such as Al, Mo, V, Ni and Co, contained ... | 01/08/1980 |
