Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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 |
| 7541491 | Gene involved in growth-promoting function of acetic acid bacteria and uses thereof The present invention provides a gene involved in the growth-promoting function of acetic acid bacteria and a microorganism containing the gene. In particular, the present invention provides a method for enhancing the growth-promoting function of acetic acid bacteri... | 06/02/2009 |
| 7241365 | Material for a facility for the production of anhydrous formic acid The invention relates to an apparatus and a process for the preparation of anhydrous or substantially anhydrous formic acid. This apparatus is constructed partly or entirely of substantially zirconium-free materials. The extractant employed is a liquid of the genera... | 07/10/2007 |
| 7053241 | Acetic acid production methods incorporating at least one metal salt as a catalyst stabilizer Processes for the production of acetic acid by carbonylation of methanol, and reactive derivatives thereof, in a reaction mixture using a rhodium-based catalyst system with at least one metal salt catalyst stabilizer selected from the group of ruthenium salts, tin s... | 05/30/2006 |
| 6878828 | Synthesis of 2-alkylcysteine via substituted thiazoline ester Non-natural amino acids such as 2-alkylated amino acids allow for the synthesis of a wider variety of peptidal and non-peptidal pharmaceutically active agents. In one embodiment, the present invention relates to a method of preparing a 2-alkylcysteine comprising con... | 04/12/2005 |
| 6781013 | Process for producing acrolein and acrylic acid A process is provided which can effectively inhibit occurrence of hot spots in reaction zones or heat accumulation at the hot spots, in the occasion of producing acrolein and acrylic acid through vapor phase oxidation of propylene in the presence of a catalyst using... | 08/24/2004 |
| 6458996 | Process for the production of acetic acid In a process for the production of acetic acid by carbonylation of methanol and/or a reactive derivative in the presence of a Group VIII noble metal carbonylation catalyst, methyl iodide co-catalyst at a concentration of at least 2 wt %, optionally at lea... | 10/01/2002 |
| 6399816 | Method for selectively producing acetic acid through the catalytic oxidation of ethane The invention relates to a method for selectively producing acetic acid from a gaseous feedstock of ethane, ethylene or mixtures thereof and oxygen at a high temperature. Said gaseous feedstock is brought together with a catalyst containing the elements M... | 06/04/2002 |
| 6084125 | Process for producing aliphatic acids using a reactor system having a shell and a tube reactor configuration to force circulation of reaction liquid A shell and tube heat exchanger reactor with forced circulation is used to improve heat and mass transfer for exothermic liquid--liquid, gas-liquid and gas-liquid-solid reactions. Enhanced productivity and selectivity are obtained.... | 07/04/2000 |
| 5264625 | Catalytic gas-phase oxidation of acrolein to acrylic acid A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a fixed-bed reactor with contacting tubes, at elevated temperature on catalytically active oxides with a conversion of acrolein for a single pass of ࣙ95%, wherein the reactio... | 11/23/1993 |
| 5095143 | Method for increasing the efficiency of liquid phase oxidation reactions A method to oxidize an oxidizable component in a liquid phase with an oxygen-containing gas is disclosed. The method comprises mixing the liquid phase and gas phase in a reactor with a rotating agitator element operated at constant power.... | 03/10/1992 |
| 4985592 | Process for the preparation of unsaturated carboxylic acids The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 200° to 500° C. to give the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst represented by the following formula: Mo12 ... | 01/15/1991 |
| 4935549 | Process for producing acetic acid A process for producing acetic acid directly from ethylene under mild conditions is provided, wherein ethylene and oxygen are respectively coordinated with the respective transition metals contained in a specified composite catalyst system, and ethylene a... | 06/19/1990 |
| 4691053 | Process for producing organic compounds by utilizing oxygenic complexes A novel process for producing oxygen-containing organic compounds with high selectivity and good yield by oxidizing organic compounds under mild conditions is provided, which process comprises using as a catalyst for the oxidation, a complex (Mm | 09/01/1987 |
| 4620035 | Production of acrylic acid by oxidation of acrolein Production of acrylic acid by oxidation of acrolein with gas containing oxygen in the gas phase at elevated temperature in the presence of a catalyst which, in addition to oxygen, consists essentially of (a) molybdenum, (b) tungsten, (c) vanadium and (d) ... | 10/28/1986 |
| 4618709 | Waste water treatment in the production of methacrylic acid A process for separation of methacrylic acid from a methacrylic acid-containing, gaseous reaction mixture obtained by subjecting methacrolein or a compound which can afford methacrolein under reaction conditions and molecular oxygen to gas phase reaction ... | 10/21/1986 |
| 4552978 | Oxidation of unsaturated aldehydes A vapor phase catalytic process for making an unsaturated carboxylic acid from an olefinically unsaturated aldehyde, particularly acrylic acid from acrolein, by oxidation thereof with molecular oxygen, optionally in the presence of steam and a new catalys... | 11/12/1985 |
| 4549025 | Process for oxidizing aldehydes to carboxylic acids Carboxylic acids having the general formula: wherein R is selected from the group consisting of aryl, aralkyl, aralkenyl, aralkynyl, heteroaryl, heteroarylalkyl, heteroarylalkenyl, heteroarylalkynyl, alkyl, alkenyl and alkynyl, optionally substituted by i... | 10/22/1985 |
| 4504677 | Process for producing methacrylic acid A process for producing methacrylic acid by the vapor phase catalytic oxidation of methacrolein with molecular oxygen or a molecular oxygen-containing gas comprises using a catalyst of multi-elemental complex oxide having the formula wherein X represents ... | 03/12/1985 |
| 4487962 | Preparation of methacrylic acid by gas phase oxidation of methacrolein An oxidation catalyst wherein the catalytically active component has the general formula where X is Cr and/or Fe, Y is Nb, Z is Na, Li, K and/or Rb, a is 0.1-4, b is 0.001-1, c is 0.05-2, d is 0.05-4, e is 0.1-5, f is 0-2, g is 0-3 and h is 0-2, and x is ... | 12/11/1984 |
| 4433167 | Process for the manufacture of methacrylic or acrylic acid A catalyst comprising (1) palladium, (2) phosphorus, (3) antimony, (4) X and (5) oxygen wherein X denotes at least one element selected from the group consisting of potassium, sodium, rubidium, lithium, cerium, beryllium, magnesium, calcium, vanadium, str... | 02/21/1984 |
| 4408071 | Process for the production of carboxylic acids Aldehydes, such as acetaldehyde, are oxidized to carboxylic acids, such as acetic acid, by contacting the aldehyde with oxygen at oxidative conditions in the presence of a catalyst of the empirical formula where M is at least one of K, Rb, Cs and Tl; M' is at ... | 10/04/1983 |
| 4404397 | High conversion of C3 and C4 olefins to corresponding unsaturated aldehydes and acids with stable molybdenum catalysts A stabilized heteropoly molybdate catalyst precursor in calcined form and containing anionic molybdenum in defect state is surface impregnated with certain metal cations. The stabilized precursor is one obtained by incorporating into the reaction product ... | 09/13/1983 |
| 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 |
| 4380663 | Process for the preparation of practically formic acid-free acetic acid A process is provided for the preparation of practically formic acid-free acetic acid by oxidation of acetaldehyde in the liquid phase with oxygen or oxygen-containing gases in the presence of mixtures of cobalt, nickel and manganese salts as catalysts.... | 04/19/1983 |
| 4365087 | Production of acrylic acid In the production of acrylic acid by a two-stage, vapor-phase catalytic oxidation of propylene, a composite oxide catalyst expressed by the formula Moa Bib Nic Cod Fee Naf Mng B | 12/21/1982 |
| 4358608 | Process for producing unsaturated aliphatic acids The present invention relates to a process for the production of unsaturated aliphatic acids and the catalyst therefor, by the vapor phase oxidation of the corresponding unsaturated aliphatic aldehydes with molecular oxygen, optionally in the presence of ... | 11/09/1982 |
| 4341900 | Catalytic process for the preparation of unsaturated carboxylic acid The gas phase catalytic oxidation of an unsaturated aldehyde with molecular oxygen at 240° to 450° C. to give the corresponding unsaturated carboxylic acid is conducted in the presence of a catalyst of the following formula: wherein Mo is molybdenum, P ... | 07/27/1982 |
| 4328365 | Hydrocarbon oxidation via carbon monoxide reduced catalyst The present invention provides a supported catalyst for use in a vapor phase reaction for the high yield conversion of lower aliphatic hydrocarbons such as butane to corresponding monocarboxylic acids such as acetic acid. The catalyst is prepared by the c... | 05/04/1982 |
| 4317926 | Process for preparing and recovering acrylic acid In a process for producing acrylic acid which comprises contacting with water an acrylic acid-containing reaction product gas which has been obtained by the catalytic vapor phase oxidation of an olefinic compound of a general formula, CH2 .dbd.... | 03/02/1982 |
| 4285875 | Process for preparing carboxylic acids by catalytic oxidation of aldehydes A process for preparing carboxylic acids by the oxidative conversion of the corresponding aldehydes comprises oxidizing the aldehydes in the presence of a catalyst comprising the anion [Fe(CN)5 H2 O]-3. The catalyst may be... | 08/25/1981 |
| 4263448 | Process for oxidation of hydrocarbons An oxidizable hydrocarbon is oxidized in a reaction zone at elevated temperature in the presence of a liquid reaction medium by introducing the hydrocarbon and a feed stream containing molecular oxygen to the reaction zone under conditions sufficient to o... | 04/21/1981 |
| 4252983 | Production of acetic anhydride and acetic acid from acetaldehyde Acetic acid and acetic anhydride are produced continuously from acetaldehyde which is reacted by oxidizing it with gaseous oxygen in liquid phase in the presence of copper acylate and cobalt acylate as a catalyst and in the presence of an aliphatic carbox... | 02/24/1981 |
| 4246427 | Process for producing methacrylic acid Methacrylic acid is produced from methacrolein by gaseous phase oxidation in a very high selectivity, when methacrolein, molecular oxygen-containing gas and steam in a molar ratio of methacrolein:molecular oxygen:steam of 1:1-3:0-50 are subjected to react... | 01/20/1981 |
| 4230887 | Recovery of anhydrous acids C2 -C6 monocarboxylic and dicarboxylic acids are scrubbed from gas phase mixtures of such acids and water by gas absorption techniques utilizing a liquid solvent comprising a polyoxyalkylene glycol or a monoalkyl or dialkyl ether the... | 10/28/1980 |
| 4223161 | Process for producing unsaturated aliphatic acids The present invention relates to a process for the production of unsaturated aliphatic acids and the catalyst therefor, by the vapor phase oxidation of the corresponding unsaturated aliphatic aldehydes with molecular oxygen, optionally in the presence of ... | 09/16/1980 |
| 4200764 | Oxidation of aliphatic hydrocarbons with high strength hydrocarbon oxidation catalyst The present invention provides an unsupported catalyst with superior crush strength for use in a vapor phase reaction for the high yield conversion of lower aliphatic hydrocarbons such as n-butane to corresponding monocarboxylic acids used as acetic acid.... | 04/29/1980 |
| 4195188 | Steam assisted hydrocarbon oxidation process The present invention provides a highly efficient process for use in the high pressure catalytic vapor phase reaction for the high yield conversion of lower aliphatic hydrocarbons such as n-butane to corresponding monocarboxylic acids such as acetic acid.... | 03/25/1980 |
| 4174459 | Process for producing methacrylic acid Methacrylic acid is produced by the vapor phase oxidation of methacrolein in the presence of a complex oxide catalyst having the formula: wherein X represents at least one of the elements selected from the group of Mn, Fe, Co, Sn and Te and a, b, c, d, e, f an... | 11/13/1979 |
| 4172955 | Thallium(III) reagents supported on montmorillonite clay minerals in oxythallation process Improved supported thallium(III) reagents are provided which significantly improve reaction rates and product selectivity of oxythallation reactions. The present reagents have a thallium(III) salt of an acid on the surface and within montmorillonite clay ... | 10/30/1979 |
| 4148822 | Process for the manufacture of methacrylic or acrylic acid Methacrolein or acrolein is oxidized with molecular oxygen in the presence of water vapor, a catalyst containing palladium, phosphorus, antimony(optionally) and oxygen and a phosphoric acid or a compound capable of forming phosphoric acid during the react... | 04/10/1979 |
