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| Number | Title | Issue Date |
| 8153542 | Method for treating flue gas catalysts A method for treating a catalyst base that comprises a contact area of porous material. A fluid, such as a flue gas stream, can be conducted along the contact area. A catalytically relevant substance is introduced into pores of the catalyst base using a transport fl... | 04/10/2012 |
| 8114802 | Heavy oil upgrade process including recovery of spent catalyst A process to upgrade heavy oil and convert the heavy oil into lower boiling hydrocarbon products is provided. The process employs a catalyst slurry comprising catalyst particles with an average particle size ranging from 1 to 20 microns. In the upgrade process, spen... | 02/14/2012 |
| 8012899 | Recycling of ionic liquid catalyst Provided is a process for safely transporting or recycling an ionic liquid catalyst based on chloroaluminates. The process comprises mixing a secondary alcohol with an ionic liquid based on a chloroaluminate and allowing a reaction to occur forming an aluminum chlor... | 09/06/2011 |
| 7906447 | Regeneration and rejuvenation of supported hydroprocessing catalysts Methods for rejuvenation of supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, making use of these metals, an organic complexing agent, and optionally an organic additive, are provided. The rejuvenation includes stripping and regenerati... | 03/15/2011 |
| 7439390 | Process for preparing amino acids using the amidocarbonylation reaction The present invention relates to a sequence for the preparation of amino acids, for example alpha-amino acids, in particular methionine, by making use of an amidocarbonylation reaction in the presence of a cobalt carbonyl catalyst and separating the catalyst in the ... | 10/21/2008 |
| 7361619 | Fischer-Tropsch catalyst production Dispersed Active Metal catalyst for hydrogenation reactions is produced by treating a substantially catalytically inactive metal particulate with a solution capable of oxidizing the metal particulate and comprising of at least one compound of a hydrogenation catalys... | 04/22/2008 |
| 7208624 | Process for producing acetic acid An improved process is disclosed for producing acetic acid, including the following steps: reacting a carbonylatable reactant such as methanol, methyl acetate, methyl formate or dimethyl ether with carbon monoxide in a reaction medium containing water, methyl iodide... | 04/24/2007 |
| 7182926 | Process for separating and recovering valuable metals A process for economically separating and recovering valuable metal components, with few kinds of chemicals being used, with no waste water that causes environmental pollution being discharged, and also perfectly no by-products being formed by means of simple steps.... | 02/27/2007 |
| 7163908 | Metathesis catalysts The present invention relates to supported catalysts based on Re2O7/(—Al2O3 for use in the preparation of cycloalkadienes in a metathesis reaction, a process for preparing cycloalkadienes in the presence of these support... | 01/16/2007 |
| 7045666 | Bromination of hydroxyaromatic compounds and further conversion to dihydroxyaromatic compounds Brominated hydroxyaromatic compounds such as p-bromophenol are prepared by contacting a hydroxyaromatic compound with oxygen and a bromine source such as hydrogen bromide or an alkali metal or alkaline earth metal bromide in an acidic medium, in the presence of elem... | 05/16/2006 |
| 6994799 | Ester-containing fluid compositions Disclosed are ester-containing fluid compositions, methods of making such compositions, and methods of using such compositions. The fluid compositions comprise a mix of branched and linear ester compounds, and the fluid compositions are characterized by certain perf... | 02/07/2006 |
| 6982234 | Methods and apparatus for removing catalyst from oxidation reactor effluent Methods and apparatus for removing a catalyst from a reaction mixture formed by reacting a hydrocarbon or an oxygenated hydrocarbon with an oxidant in the presence of the catalyst in a reactor, in which the reaction mixture contains one or more dibasic acids. The ca... | 01/03/2006 |
| 6960699 | Method for the hydroformylation of olefins The invention relates to a process for preparing alcohols by hydroformylation of olefins or olefin mixtures, separation from the catalyst and subsequent hydrogenation, with an extraction being carried out after removal of the catalyst and before the hydrogenation of... | 11/01/2005 |
| 6930210 | Process to produce polyether polyols The invention relates to a process to produce high-purity, low-odour polyether polyols, with very low levels of catalytic residues, by means of alkene oxide polyaddition reactions to substances that contain active hydrogens in the presence double metal cyanides as c... | 08/16/2005 |
| 6927307 | Method for reactivating catalyst for methacrylic acid preparation This invention provides a method of reactivating a catalyst for methacrylic acid production, which catalyst is used in production of methacrylic acid through vapor-phase oxidation of methacrolein or vapor-phase oxidative dehydrogenation of isobutyric acid, contains ... | 08/09/2005 |
| 6923922 | Recover and recycle rhodium from spent partial oxidation catalysts A method for the recovery of rhodium from spent supported catalysts. In one embodiment, a method for recovering rhodium from a host material includes roasting the host material in air at a temperature sufficient to convert at least a portion of rhodium to Rh2 | 08/02/2005 |
| 6912962 | Apparatus for the cleaning of flue gases containing sulfur dioxide An apparatus for the cleaning of flue gases containing ash and sulfur dioxide produced by burning sulfur-containing coal in the combustion chamber of a circulating fluidized-bed firing system includes a system for delivering a particulate SO2 sorbent into... | 07/05/2005 |
| 6809053 | Method for reactivating sulfonated resin catalyst A sulfonated resin catalyst whose activity has lowered as a result of use in the polymerization of silicone oil is reactivated by washing the catalyst with a low molecular weight siloxane medium, volatilizing off the siloxane medium under atmospheric or reduced pres... | 10/26/2004 |
| 6777369 | Process for producing catalyst The present invention relates to the effective utilization of a used catalyst containing at least molybdenum, an A element (at least one element selected from the group consisting of phosphorus and arsenic) and an X element (at least one element selected from the gr... | 08/17/2004 |
| 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 |
| 6559085 | Method for regenerating molybdenum-containing oxide fluidized-bed catalyst A method for regeneration of a molybdenum-containing oxide fluidized bed catalyst which comprises impregnating a fluidized catalyst of a metal oxide containing molybdenum, bismuth and iron which has been deteriorated by being used for a reaction in produc... | 05/06/2003 |
| 6555004 | Method for separating catalyst, product and solvent A method for separating an oxidation catalyst, an oxidation reaction product and a reaction solvent from a reaction mixture obtained by oxidizing a substrate in the presence of an oxidation catalyst containing an aromatic N-hydroxyimide compound and a tra... | 04/29/2003 |
| 6403514 | Process for the regeneration of zeolitic catalysts containing titanium A process is described for regenerating exhausted zeolitic catalysts containing titanium and deriving from oxidation processes of organic substrates with hydrogen peroxide. Said process consists in carrying out a treatment in an aqueous medium with hydrog... | 06/11/2002 |
| 6331261 | Water softener salt formulation The monosodium and monopotassium citrates are improved iron-sequestering agents in salt compositions for regenerating spent water softener cation exchange resins. The dry compositions comprise a surfactant, an alkali metal chloride selected from the group... | 12/18/2001 |
| 6309996 | Suspension carbonation process for reactivation of partially utilized sorbent A novel process has been developed for reactivation of partially utilized calcium-based sorbents for increased SO2 removal and sorbent utilization from coal-fired boilers/combustors. Spent sorbent and combustor ash samples are treated under spe... | 10/30/2001 |
| 6255510 | Production of aromatic carboxylic acids and recovery of Co/Mn catalyst from ash Cobalt and/or manganese is recovered from the ash obtained following incineration of the catalyst containing residue arising from the liquid phase oxidation of an aromatic carboxylic acid such as terephthalic acid. Recovery is effected by contacting the a... | 07/03/2001 |
| 6232495 | Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids This invention relates to methods and reactor devices for controlling the oxidation of hydrocarbons to dibasic acids, in the presence of a cobalt catalyst and a monobasic acid, such as acetic acid, by treating the catalyst from the reaction mixture, outsi... | 05/15/2001 |
| 6162753 | Process for recovering cobalt carbonyl catalysts used to produced N-acyl-alpha-amino acid derivatives by amidocarbonylation The present invention relates to a process for recovering cobalt carbonyl catalysts used in the preparation of N-acyl-alpha-amino acid derivatives by amidocarbonylation comprising the process steps: adding aqueous hydrogen peroxide solution to the reaction sol... | 12/19/2000 |
| 6096673 | Catalyst recovery in the production of 2,5-dihydrofuran by isomerization of vinyl oxirane An improved process is provided for the recovery of catalyst components from oligomeric impurities which are formed during the industrial preparation of 2,5-dihydrofuran by the catalytic isomerization of vinyl oxirane followed by an essential separation o... | 08/01/2000 |
| 5965472 | Recovery of catalyst systems from diaryl carbonate-containing reaction solutions by suspension crystallization Catalyst systems with a content of a platinum-group-metal catalyst, a co-catalyst, a quaternary salt and a base for the oxidative carbonylation of aromatic hydroxy compounds to the corresponding diaryl carbonates are according to the invention obtained as... | 10/12/1999 |
| 5955394 | Recovery process for oxidation catalyst in the manufacture of aromatic carboxylic acids An improved separation process for the continuous catalytic oxidation of aromatic alkyls for the production of aromatic carboxylic acids in a liquid solvent medium, wherein the reactor product stream is withdrawn from the oxidation process, then separated... | 09/21/1999 |
| 5936130 | Process for preparing a rhodium complex solution and process for producing an aldehyde A process for producing a rhodium complex solution, which comprises contacting an aqueous solution of a water-soluble rhodium compound and an organic solvent solution of a water-insoluble tertiary organic phosphorus compound, preferably in the presence of... | 08/10/1999 |
| 5908805 | Preparation of transition metal/phosphine catalysts by hydrogen reduction Transition metal (0) or (1)/phosphine catalysts suited, e.g., for the hydrocyanation of ethylenically unsaturated compounds, are produced by reducing, via hydrogenation, aqueous solutions containing at least one transition metal compound and at least one ... | 06/01/1999 |
| 5882619 | Preparation of a hydrogenation catalyst using M(OR)m Xn A carbon-containing catalyst support is prepared by treating the carbon-containing catalyst support with a compound of the formula I M(OR)m Xn I where M is Ti or Zr, X is Cl or Br, and R is C1 ... | 03/16/1999 |
| 5840643 | Recovery of oxidation catalysts used for the production of trimellitic acid A method for separating oxidation catalysts used for producing trimellitic acid, which comprises the steps of: adding water to a reactor effluent in a volume ratio of water to the reactor effluent of 0:1 to 11:1, the reactor effluent being in a slurry sta... | 11/24/1998 |
| 5837635 | Process for producing mixed oxide powders from deactivated denox catalysts The invention relates to a process for re-processing deactivated DENOX catalysts on the basis of Ti/V/Mo/W mixed oxides.... | 11/17/1998 |
| 5756413 | Process for recovering cobalt carbonyl catalysts used in the preparation of N-acyl--amino acid derivates by amidocarbonylation The present invention relates to a process for recovering the cobalt carbonyl catalyst used, in which a water-soluble cobalt salt is first prepared by addition of acid and this is subsequently precipitated as cobalt hydroxide. This cobalt hydroxide is the... | 05/26/1998 |
| 5716895 | Process for regeneration of catalysts A simple and excellent process for the regeneration of heteropolyacid catalysts can be provided. A heteropolyacid catalyst, e.g. a phosphomolybdic acid catalyst, whose activity has been lowered can be regenerated by dissolving and/or suspending it in an a... | 02/10/1998 |
| 5693833 | Process for the reactivation of iodine-containing catalysts Disclosed is a process for converting an iodine-free organotin (IV) compound resulting from the decomposition of an organotin (IV) iodide during the catalytic isomerization of γ,δ-epoxyalkenes to 2,5-dihydrofurans to the corresponding, catalytically act... | 12/02/1997 |
| 5648308 | Process for upgrading metallocene catalysts Inorganic and organic impurities are removed from a metallocene catalyst compound comprising the steps of (a) separating inorganic impurities from said compound by forming a solution of said compound in an organic solvent medium which is substantially a n... | 07/15/1997 |
