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| Number | Title | Issue Date |
| 7129380 | (Z)-7-cyclohexadecen-1-one as an odorant The compound (Z)-7-cyclohexadecen-1-one is described as a musk odorant. Also described are odorant or aroma mixtures comprising (Z)-7-cyclohexadecen-1-one and one or more other odorants or aromas. ... | 10/31/2006 |
| 7112700 | Efficient and economic asymmetric synthesis of nootkatone, tetrahydronootkatone, their precursors and derivatives An inexpensive, stereoselective synthesis for nootkatone, tetrahydronootkatone, and their derivatives is disclosed. The starting materials used in the synthesis are inexpensive. The principal starting material, (−)-β-Pinene, is on the GRAS list (generally recogni... | 09/26/2006 |
| 6995267 | Method for producing cyclopentadiene compounds A process for preparing substituted cyclopentadiene compounds and cyclopentadiene compounds which can be prepared thereby are described. ... | 02/07/2006 |
| 6979751 | Processes for the preparation of higher molecular weight ketones Processes for producing higher molecular weight ketones are disclosed that include the steps of feeding an aldol catalyst solution, a lower molecular weight aldehyde, and a lower molecular weight ketone, through a reactor provided with a solid hydrogenation catalyst... | 12/27/2005 |
| 6642180 | Biphenyl-substituted cyclic ketoenols as pesticides The present invention relates to novel biphenyl-substituted cyclic ketoenols of the formula (I) ##STR1## in which W represents hydrogen, halogen, alkyl, alkoxy, alkenyloxy, halogenoalkyl, halogenoalkoxy, halogenoalkenyloxy, nitro or cyano, X repre... | 11/04/2003 |
| 6639112 | Method for preparing ketones by pyrogenic reaction of aldehydes, alcohols, acids or esters The invention concerns a method for preparing ketones of formula (I) wherein A and B are as defined in claim 1, consisting of reacting at a temperature ranging between 250 and 500° C. a compound of formula (II): A--X with a compound of formula (III): B--... | 10/28/2003 |
| 6610889 | Catalytic compositions and methods for asymmetric aldol reactions Methods and compositions are provided for the direct catalytic asymmetric aldol reaction of aldehydes with donor molecules selected from ketones and nitroalkyl compounds. The reactions employ as catalyst a Group 2A or Group 2B metal complex of a ligand of... | 08/26/2003 |
| 6603047 | Condensation of aldehydes with ketones by multiphase reaction A process for conducting multiphase reactions, especially the preparation of ,ଲ-unsaturated ketones by condensation of aldehydes with ketones.... | 08/05/2003 |
| 6521796 | Dihydro and hexahydro isoalpha acids having a high ratio of trans to cis isomers, production thereof, and products containing the same This invention describes heretofore unknown forms of dihydro (DHIA) and hexahydro (HHIA) isoalpha acids having a high ratio of trans to cis isomers and a process for their production. Also, non-precipitating clear 5, 10, 20% and higher aqueous solutions t... | 02/18/2003 |
| 6518461 | Method of continuously producing a cyclododecanone compound A cyclododecanone compound is continuously produced by an isomerization reaction of a corresponding epoxycyclododecane compound in the presence of a catalyst including lithium bromide and/or lithium iodide, the isomerization reaction being carried out by ... | 02/11/2003 |
| 6433229 | Method of producing cyclic, , ଲ-unsaturated ketones Preparation of cyclic, ,ଲ-unsaturated ketones of formula II by dehydrogenation of cyclic ketones which conform to formula I ##STR1## in which n denotes an integer from 1 to 10, and which may be substituted, at elevated temperature in the pres... | 08/13/2002 |
| 6423874 | Process for obtaining fragrant ketone A process for obtaining Ketone of formula 1a,b, which includes contacting a Ketone represented by formula 2a,b with a first catalyst under conditions and for a time sufficient to obtain an intermediate mixture, which intermediate mixture contains a Ketone... | 07/23/2002 |
| 6417405 | Synthesis of cyclopentadiene or substituted cyclopentadiene compounds Substituted or unsubstituted cyclopentadienyl are prepared by reducing 4-ketocyclopentene to an alcohol, replacing the hydroxyl functionality with a leaving group and deprotonating the resulting product under base induced elimination conditions.... | 07/09/2002 |
| 6376719 | Process for the preparation of alkaline earth metal salts of ଲ-diketo compounds An alkaline earth metal salt of ଲ-diketo compound is produced using 1 mol of a powdery alkaline earth metal compound and 2.04 mol or more of an aliphatic ଲ-diketo compound. The reaction may be carried out while supplying both components to a r... | 04/23/2002 |
| 6342644 | Method for producing 1-menthol Provided is a method for the production of 1-menthol, which comprises hydrogenation of piperitenone with a transition metal complex of a specified optically active phosphine to produce pulegone, hydrogenation of the obtained pulegone with a ruthenium-phos... | 01/29/2002 |
| 6303824 | Method of hydrogenating iso- acids in a buffered solution A method of preparing tetrahydroiso--acids from iso--acids is disclosed wherein the reaction medium is a buffered, aqueous alcoholic solution. The method can also employ up to 85% w/w spent hydrogenation catalyst. The method advantageously a... | 10/16/2001 |
| 6288281 | Direct carbonylation of paraffins using an ionic liquid catalyst A process for the carbonylation of saturated hydrocarbons to give an oxygenated saturated hydrocarbon is disclosed and claimed. The process involves using an acidic ionic liquid catalyst to catalyze the carbon monoxide addition to the saturated hydrocarbo... | 09/11/2001 |
| 6093844 | Method of producing alkaline-earth salts of aliphatic ଲ-keto compounds Proposed is a method of producing alkaline-earth salts of aliphatic ଲ-keto compounds by reacting alkaline-earth hydroxides with aliphatic ଲ-ketoesters and/or ଲ-diketones in the absence of solvent to give the corresponding alkaline-earth ... | 07/25/2000 |
| 6020019 | Hydrogenation of hop soft resins using CO2 Carbon dioxide is used as a reaction solvent in the hydrogenation of organic compounds. The carbon dioxide is preferably a liquid or a supercritical fluid. The hydrogenation method can be used advantageously in methods for making tetrahydroiso-alpha-acids... | 02/01/2000 |
| 6008415 | Cyclohexane oxidation Cyclohexane is catalytically oxidized to produce cyclohexanol and cyclohexanone and precursors of these products. The oxidation is carried out in a liquid oxidation reactor at high oxygen concentrations (greater than 30% and preferably greater than 90% ox... | 12/28/1999 |
| 5965777 | Process to remove catalyst poisons from hop extracts A process for the removal of catalyst poisons from hops and hop extracts is disclosed. After processing the hops to extract the alpha or beta acids therein, the alpha or beta acids are treated with activated nickel catalyst. The activated nickel catalyst ... | 10/12/1999 |
| 5917093 | Purification of -acids and ଲ-acids Unsaturated organic compounds, in particular -acids and ଲ-acids, are purified prior to hydrogenation by mixing them with an adsorbent capable of adsorbing catalyst poisons, preferably activated carbon, and separating the adsorbent containing ... | 06/29/1999 |
| 5877354 | Process for making isophorone with improved color and color stability The present invention is a process for the production of isophorone having improved color and color stability. Crude isophorone is selectively hydrogenated to remove color forming impurities. The product isophorone will have an APHA color of about 10 or l... | 03/02/1999 |
| 5874633 | Concentrated single phase aqueous solutions of tetrahydroiso--acids and methods of preparing the same A concentrated single phase aqueous alkaline solution of tetrahydroiso--acids having greater than 10% to about 45% w/w tetrahydroiso--acids is disclosed. A method of hydrogenating and formulating a starting solution of iso--acids to o... | 02/23/1999 |
| 5780683 | Cyclohexane oxidation Cyclohexane is catalytically oxidized to produce cyclohexanol and cyclohexanone and precursors of these products. The product is then catalytically hydrogenated while the product is still at reaction temperature to produce additional cyclohexanol and cycl... | 07/14/1998 |
| 5767319 | Preparation of tetrahydroiso--acids by the hydrogenation of the metal salts of iso--acids Tetrahydroiso--acids are prepared from iso--acids metal salts by hydrogenating the salts in a reaction solvent of a lower alkanol containing about 5% to about 20% w/w water and in the presence of up to about 5-50 psig hydrogen and a hydrogen... | 06/16/1998 |
| 5600012 | Process for producing tetrahydroisoalpha acids Tetrahydro-iso--acids ("THIAA") are prepared directly from iso--acids ("IAA") by hydrogenation. Free IAA are first dissolved in ethanol. The solution is then hydrogenated in the presence of a particular type of noble metal catalyst. Hydrogen... | 02/04/1997 |
| 5563286 | Synthesis of 19-nor vitamin D compounds A process is disclosed for the removal of the 4-protected hydroxy group from compounds of the following formula: ##STR1## where A is --COOAlkyl and B is hydroxy, or A and B together represent either oxo or .dbd.CHCOOAlkyl, where X1 and X | 10/08/1996 |
| 5523489 | Preparation of tetrahydroisohumulones Tetrahydroisohumulones are prepared from isohumulones by hydrogenating the isohumulones in a reaction solvent of ethanol containing up to about 15% water in the presence of about 1 to about 40 psig of hydrogen and a hydrogenation catalyst to form tetrahyd... | 06/04/1996 |
| 5292960 | Process for purification of cyclohexanone Cyclohexanone which has been obtained by dehydrogenation of a cyclohexanone/cyclohexanol mixture is substantially freed from by-products, in that such a dehydrogenation mixture is treated in the gas or liquid phase with hydrogen on a hydrogenation catalys... | 03/08/1994 |
| 5276199 | Process for preparing cyclopentenones A process for preparing a cyclopentenone by forming a two-phase mixture of a 1,4-diketone, a water immiscible organic solvent, and an aqueous base solution, and heating the mixture so as to convert the 1,4-diketone to a cyclopentenone which collects in th... | 01/04/1994 |
| 5276198 | Process for producing 2-methyl-1,3-cyclohexanedione and 2-methylresorcinol A process for producing 2-methyl-1,3-cyclohexanedione which comprises subjecting 1,3-cyclohexanedione, formaldehyde and a dialkylamine to Mannich reaction to obtain a 2-dialkylaminomethyl-1,3-cyclohexanedione, and subjecting the 2-dialkylaminomethyl to hy... | 01/04/1994 |
| 5162586 | Enantioselective addition of hydrocarbons to alpha,beta-unsaturated carbonyl compounds The conjugate addition of hydrocarbon equivalents to alpha,beta-unsaturated carbonyl compounds using a series of novel catalysts is described. The catalysts comprise copper(I) complexes with ligand systems comprising either tropocoronand macrocycles or N,... | 11/10/1992 |
| 5146003 | 3-amino-2-hydroxybornane derivatives, asymmetric Michael reaction using the same, and process for preparing optically active muscone utilizing Michael reaction A 3-amino-2-hydroxybornane derivative represented by formula (I): ##STR1## wherein R represents a furfuryl group, a 1-methylpyrrolylmethyl group, or a benzyl group, is disclosed. The compound is useful as a ligand in an asymmetric Michael reaction, p... | 09/08/1992 |
| 5081311 | Preparation of muscone, intermediates for this preparation and preparation of said intermediates Muscone of the formula I ##STR1## is prepared by a process in which an open-chain 2,15-diketone of the general formula II CH3 --CO--X--CO--CH3 (II) where X is one of the radicals --(--CH2 --) | 01/14/1992 |
| 5081310 | Process for preparing optically active ketones A process for preparing an optically active ketone represented by formula (I): ##STR1## wherein R1 represents a hydrogen atom or an alkyl group having from 1 to 5 carbon atoms; and n represents 1 or 2, which comprises asymmetrically hydrog... | 01/14/1992 |
| 4940819 | Process for the hydrogenation of ,ଲ-unsaturated ketones The catalytic hydrogenation of ,ଲ-unsaturated ketones of the formula R1 --CH.dbd.CH--CO--R2, in which R1 and R2 independently of one another represent straight-chain or branched alkyl, hydroxy-alkyl, alk... | 07/10/1990 |
| 4918240 | Purification of beta acids for hydrogenolysis and such purified beta acids Beta acids, separated from hop extracts, are purified prior to hydrogenolysis by mixing with an aqueous solution of polyvalent metal ions, preferably edible ions such as magnesium or calcium ions, separating the aqueous beta acids from insoluble materials... | 04/17/1990 |
| 4820874 | Increasing the yield of 2.5.6-trimethylcyclohex-2-en-1-one The yield of 2,5,6-trimethyl-cyclohex-2-en-1-one is increased by reacting diethyl ketyone, in the presence of an alkali, with crotonaldehyde or a compound which is converted to crotonaldehyde under the reaction conditions chose, and working up the reactio... | 04/11/1989 |
| 4788342 | Process for preparation of 4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2) 4,4,8,8,10-pentamethylbicyclo[4,4,0]-decene-(1,6)-one(2), is produced from the bottom product of the acetone condensation reaction collecting in the production of isophorone by fractionation. A ketone blend consisting essentially of C15 compoun... | 11/29/1988 |
