Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7820579 | Method of restoring catalytic activity to a spent hydrotreating catalyst, the resulting restored catalyst, and a method of hydroprocessing A method of restoring catalytic activity to a spent hydroprocessing catalyst that has a first carbon concentration. The concentration of carbon on the spent hydroprocessing catalyst is reduced to provide a carbon-reduced catalyst having a second carbon concentration... | 10/26/2010 |
| 7261806 | Process to prepare a base oil from slack-wax A process to prepare a base oil starting from a slack wax containing feedstock by (a) contacting the feedstock in the presence of hydrogen with a sulphided hydrodesulphurisation catalyst having nickel and tungsten on an acid amorphous silica-alumina carrier and (b) ... | 08/28/2007 |
| 7256149 | Catalyst regeneration process Used noble metal-containing titanium zeolite catalysts, that have been employed in the liquid-phase epoxidation of olefins with hydrogen and oxygen in the presence of a buffer, are regenerated by heating the used catalyst at a temperature of at least 250° C. in the... | 08/14/2007 |
| 7169735 | Catalyst and process for preparing the same The object of the present invention is to provide a catalyst that is highly active and capable of maintaining its activity for a long period of time even in a high-temperature environment. The present invention is a catalyst including: a porous carrier which is comp... | 01/30/2007 |
| 7132582 | Catalytic process for the preparation of isolongifolene The present invention relates to a catalytic process for preparation of isolongifolene using nanocrystalline solid super acid. This process is an eco-friendly, single step, solvent free catalytic process for the preparation of a tricyclic sesqui-terpene hydrocarbon,... | 11/07/2006 |
| 7115537 | Process for the regeneration of zeolite catalysts A process for the regeneration of a zeolitic catalyst which is at least partially exhausted by use in the synthesis of optionally substituted methylenedianiline (MDA) and derivatives thereof, or of a mixture of optionally substituted MDA and derivatives thereof, wit... | 10/03/2006 |
| 7087546 | Process for regenerating and rejuvenating additive-based catalysts The present invention pertains to a process for regenerating and rejuvenating an additive-based hydrotreating catalyst containing Group VIB and Group VIII hydrogenation metals. The process comprises the steps of regenerating the catalyst by contacting it with an oxy... | 08/08/2006 |
| 7045479 | Intermediate precursor compositions used to make supported catalysts having a controlled coordination structure and methods for preparing such compositions Intermediate precursor compositions for use in manufacturing supported reactive catalysts having a controlled coordination structure, and methods for manufacturing such precursor compositions are disclosed. The precursor compositions include a catalyst complex forme... | 05/16/2006 |
| 7030053 | Catalyst composition comprising ruthenium and a treated silica support component and processes therefor and therewith for preparing high molecular weight hydrocarbons such as polymethylene A catalyst composition and a process of using a catalyst composition for preparing high molecular weight hydrocarbons, such as polymethylene, from a fluid containing hydrogen and carbon monoxide are disclosed. The catalyst composition contains ruthenium and a treate... | 04/18/2006 |
| 6958309 | Hydrothermal pretreatment for increasing average pore size in a catalyst support A pretreatment method for increasing the average pore size of a catalyst support is disclosed which increases the diffusivity and effectiveness factor η. The pretreatment method includes calcining the support in moisturized air at an elevated temperature sufficient... | 10/25/2005 |
| 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 |
| 6916965 | Treatment of acid catalysts The invention is directed to a method of stabilizing metalloaluminophosphate molecular sieves and catalysts derived therefrom. In particular, the invention is directed to a method of treating such molecular sieves with one or more nitrogen containing compounds havin... | 07/12/2005 |
| 6908873 | Regeneration of spent supported metal catalysts A method for regenerating spent supported metal catalysts comprising treating the spent catalyst with an organo-metallic complex forming agent having an ionization constant pK1 of at least 2.5. The catalyst activity is restored to an activity level near t... | 06/21/2005 |
| 6905997 | Method for generating catalysts A process is provided for the regeneration of a heterogeneous catalyst used for the preparation of compounds containing NH2 groups by the hydrogenation, with hydrogen, of compounds containing at least one unsaturated carbon-nitrogen bond, wherein ... | 06/14/2005 |
| 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 |
| 6872678 | Process for activating a catalyst containing an S-containing additive The present invention pertains to a process for activating a catalyst composition comprising at least one hydrogenation metal component of Group VI and/or Group VIII of the Periodic Table, and an S-containing organic additive, wherein the catalyst is contacted with ... | 03/29/2005 |
| 6872859 | Process for the preparation of bisphenols with zeolites The present invention relates to a process for preparing bisphenols which comprises reacting a carbonyl compound containing at least two carbon atoms with an aromatic compound, containing a hydroxyl group and at least one hydrogen atom bound to the aromatic ring, in... | 03/29/2005 |
| 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 |
| 6756516 | Treatment of acid catalysts The invention is directed to a method of stabilizing metalloaluminophosphate molecular sieves and catalysts derived therefrom. In particular, the invention is directed to a method of treating such molecular sieves with one or more nitrogen containing compounds selec... | 06/29/2004 |
| 6740615 | Regeneration of used supported noble metal catalysts A method for regenerating used supported noble metal catalysts, which method includes solvent cleaning the used catalyst by contact with a suitable organic liquid cleaning solvent such as alcohols, ketones and such to remove organic deposits from the catalyst, follo... | 05/25/2004 |
| 6710002 | Method for regenerating a zeolitic catalyst A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at fro... | 03/23/2004 |
| 6685896 | Method for recovering rhodium from reaction products of oxosynthesis The invention relates to a method for separating and recovering rhodium from reaction products of oxosynthesis, especially reaction products containing cobalt. The invention also relates to the reuse of rhodium as a catalyst for hydroformulation and to a ... | 02/03/2004 |
| 6683015 | Method for reactivating a catalyst composition The present invention is directed to a method for reactivating a deactivated carbonylation catalyst composition previously used in a carbonylation reaction involving an aromatic hydroxy compound, carbon monoxide and oxygen, so that the re-activated cataly... | 01/27/2004 |
| 6673733 | Method for regenerating heteropolyacid catalyst and method for producing methacrylic acid The invention provides a method for regenerating with high efficiency a deteriorated catalyst of reduced activity, said catalyst originating from a heteropolyacid catalyst containing heteropolyacid formed of molybdophosphoric acid and/or molybdovanadophos... | 01/06/2004 |
| 6596661 | Process for regenerating a deactivated catalyst A process for regenerating a catalyst, in particular a plate-type or honeycomb catalyst, which has been at least partially deactivated by catalyst poisons, is described. The catalyst is treated with a gaseous reducing agent and with a polyfunctional compl... | 07/22/2003 |
| 6566292 | Process for the enhancement of the cycle life of a zinc-chromium based catalyst in the synthesis of 2-methylpyrazine The present invention relates to enhancement of the cycle life of a zinc chromium based catalyst used in the synthesis of 2-methylpyrazine by increasing the reaction temperature step-wise, starting from a low temperature, while monitoring the levels of to... | 05/20/2003 |
| 6506701 | Rapid purification by polymer supported quench Novel polymer-supported quenching reagents of Formula I, P--L--Q I wherein P is a polymer of low chemical reactivity which is soluble or insoluble; Q is one or more quenching reagents, or an acid or base addition salts thereof, that are capable of selective covale... | 01/14/2003 |
| 6498120 | Rejuvenating SAPO molecular sieve with anhydrous liquid or vapor This invention is to a method of rejuvenating a molecular sieve. The method includes contacting a molecular sieve having a methanol uptake index of less than 1, or a catalyst containing molecular sieve having a methanol uptake index of less than 1, with a... | 12/24/2002 |
| 6417128 | Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst This invention relates to methods of replacing water and cyclohexanone with acetic acid in an aqueous solution of catalyst, preferably a cobalt compound. Such an aqueous solution is produced by extracting catalyst with water from a cyclohexanone/water sol... | 07/09/2002 |
| 6413897 | Method for regenerating an alkylation catalyst Disclosed is an alkylation process which utilizes a catalyst containing hydrogen fluoride, and, optionally, a volatility reducing additive, as an alkylation catalyst. The process provides for the regeneration of an alkylation catalyst having ASO, and, opt... | 07/02/2002 |
| 6380119 | Method for regenerating a zeolitic catalyst A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at from 2... | 04/30/2002 |
| 6365761 | Process for preparing alkylene oxide Process for the preparation of alkylene oxide, which process comprises passing a feed comprising an organic hydroperoxide and alkene through a bank of at least two serially connected reactors all containing a bed of heterogeneous epoxidation catalyst part... | 04/02/2002 |
| 6291394 | Process for improving catalysts Provided are high activity catalysts based upon gamma alumina containing substrates impregnated with one or more catalytically active metals which catalysts in addition contain a nanocrystalline phase of alumina of a crystalline size at the surface of les... | 09/18/2001 |
| 6284695 | Method for rejuvenating solid paraxylene adsorbent The method for rejuvenating solid paraxylene adsorbent comprises the steps of varying the water injection rate above a predetermined minimum level in a non-linear fashion for a time sufficient to produce rejuvenation of the adsorbent and if desired, addin... | 09/04/2001 |
| 6281157 | Self-catalytic bath and method for the deposition of a nickel-phosphorus alloy on a substrate Disclosed are a self-catalytic bath and a method for the deposition of Ni--P alloy on a substrate. The bath comprises nickel sulfate, sodium hypophosphite as a reducing agent, acetic acid as a buffer and traces of lead as a stabilizer. It also includes a ... | 08/28/2001 |
| 6273102 | Method of cleaning and maintaining petroleum refining plants A repairing method of a petroleum refining plant for efficiently conducting cleaning process of process equipment and pipings, unloading process of agglomerated catalyst, rinsing work of the process equipment and the pipings, thereby reducing plant shutdo... | 08/14/2001 |
| 6248683 | Process for the regeneration of used silica gel The present invention is concerned a process for the regeneration of the spent silica gel used in chromatography and for any other kind of silica. The process comprises 5 main steps, namely: washing with an extractant of organic compounds and removing volatile... | 06/19/2001 |
| 6239054 | Process for regenerating catalysts Provided are high activity catalysts based upon gamma alumina containing substrates impregnated with one or more catalytically active metals, which catalysts in addition contain a nanocrystalline phase of alumina of a crystalline size at the surface of le... | 05/29/2001 |
| 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 |
| 6194625 | Alkylation by controlling olefin ratios Disclosed are various embodiments for alkylating olefins and isoparaffins in the presence of an acid to reduce and/or control acid consumption or maximize and/or control the octane number of the produced alkylate product. One embodiment includes alkylatio... | 02/27/2001 |
