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A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 7393985 | Supported ruthenium nanoparticle catalyst for cis -dihydroxylation and oxidative cleavage of alkenes The present invention relates to the use of nanosized metal particles (e.g., ruthenium) grafted on inert solid support for oxidation of alkenes. The supported metal catalyst can effect cis-dihydroxylation and oxidative cleavage of alkenes to give the respective cis-... | 07/01/2008 |
| 7335800 | Hydrogenation catalyst and hydrogenation method The present invention provides a hydrogenation catalyst effective for hydrogenating 3-hydroxypropionaldehyde to 1,3-propanediol. The hydrogenation catalyst comprises an α-alumina support, nickel, ruthenium, and a promoter. The nickel is deposited on the α-alumina ... | 02/26/2008 |
| 7335799 | Hydroxyl compounds and compositions for cholesterol management and related uses The present invention relates to novel hydroxyl compounds, compositions comprising hydroxyl compounds, and methods useful for treating and preventing a variety of diseases and conditions such as, but not limited to aging, Alzheimer's Disease, cancer, cardiovascular ... | 02/26/2008 |
| 7049388 | Process for manufacturing an α-dihydroxy derivative and epoxy resins prepared therefrom A process for manufacturing an α-dihydroxy derivative from an aryl allyl ether wherein such α-dihydroxy derivative can be used to prepare an α-halohydrin intermediate and an epoxy resin prepared therefrom including epoxidizing an α-halohydrin intermediate produc... | 05/23/2006 |
| 6852874 | Second cycle asymmetric dihydroxylation reaction A process for catalyzing asymmetric dihydroxylations of olefins employs an Os(VI) complex as a catalytic intermediate in the formation of chiral vicinal diol products. The process requires a chiral bidentate ligand that favors diol formation in the “second cycleâ€... | 02/08/2005 |
| 6780810 | MULTIFUNCTIONAL CATALYST USEFUL IN THE SYNTHESIS OF CHIRAL VICINAL DIOLS AND PROCESS FOR THE PREPARATION THEREOF, AND PROCESS FOR THE PREPARATION OF CHIRAL VICINAL DIOLS USING SAID MULTIFUNCTIONAL CATALYSTS The present invention relates to a multifunctional reusable catalyst and to a process for the preparation thereof on a single matrix of the support to perform multicomponent reaction in a single pot. The multifunctional catalysts of the invention are useful for the ... | 08/24/2004 |
| 6740785 | Catalytic oxidation of organic substrates by transition metal complexes in organic solvent media expanded by supercritical or subcritical carbon dioxide Improved oxidation methods are provided wherein a reaction mixture comprising a substrate to be oxidized (e.g., phenols, alkenes) and an oxidation catalyst (typically dispersed in an organic solvent system) is supplemented with a compressed gas which expands the rea... | 05/25/2004 |
| 6646168 | Supported osmates, process for preparation thereof, and a process for the preparation of chiral vicinal diols using supported osmate catalyst The present invention provides a supported osmate useful as a reusable catalyst in the preparation of vicinal diols. The present invention also relates to a process for the preparation of supported osmates of the formula (S--NR3)2 Os... | 11/11/2003 |
| 6472570 | Method for the asymmetric dihydroxylation of olefins, using osmium catalysts This invention relates to process for asymmetric dihydroxylation of olefins using osmium catalysts to obtain monofunctional, bifunctional, and/or polyfunctional chiral 1,2-diols of the formula (I) R1 R2 C(OH)--C(OH)R3 R4 | 10/29/2002 |
| 6387033 | Preparation of new layered double hydroxides exchanged with osmate for asymmetric dihydroxylation of olefins to vicinal diols LDH-osmate of the formula [MII.sub.(1-x) MIIIx (OH)2 ][OsO42- ]x/2.zH2 O wherein MII is a divalent cation selected from the group consisting of Mg2+, ... | 05/14/2002 |
| 6194615 | Crosslinkers based on dibenzalacetone derivatives The present invention relates to the composition, process of preparation, and use of novel derivatives prepared from 1,5-bis-(4'-carbomethoxyphenyl)-1,4-pentadien-3-one. These novel compositions can act as crosslinkers with polyfunctional monomeric, ... | 02/27/2001 |
| 6100412 | Process for the epoxidation of olefinic compounds A process for the production of an epoxide and/or its corresponding vicinal diol by a reaction of an olefinic compound with hydrogen peroxide, wherein the reaction is performed in the presence of a carbon dioxide phase at a temperature and a pressure abov... | 08/08/2000 |
| 5959163 | Process for the preparation of 1,4-butenediol from epoxybutene Disclosed is a process for the preparation of 2-butene-1,4-diol comprising contacting a mixture of water and 1,2-epoxy-3-butene with a catalyst comprising a metal halide, zeolite and a non-protic solvent.... | 09/28/1999 |
| 5892066 | Propylene oxide and derivatives process Propylene is oxidized with molecular oxygen in the liquid phase to form products including propylene oxide, propylene glycol, propylene glycol esters, allyl alcohol, acrolein and acetal, the acrolein is hydrogenated to allyl alcohol, the acetol is hydroge... | 04/06/1999 |
| 5850086 | Iron complexes for bleach activation and stereospecific oxidation A bleach and oxidation catalyst is provided comprising a catalytically active iron complex which can activate hydrogen peroxide or peroxy acids, for example.... | 12/15/1998 |
| 5688975 | Rare earth stabilized Cr/Ti substituted molecular sieves Molecular sieve compositions have been synthesized which are resistant to the loss of framework atoms. Specifically, the molecular sieves of the invention have the empirical formula mA: (Mw Alx Siy)O2 where A is at l... | 11/18/1997 |
| 5530167 | Process for the preparation of 1,4-butenediol Disclosed is an improved process for the preparation of 1,4-butenediol by the hydrolysis of 3,4-epoxy-1-butene (EpB) wherein a mixture of EpB and water is contacted with a catalyst comprising a catalyst support material an copper in a positive valence sta... | 06/25/1996 |
| 5516929 | Method for catalytic asymmetric dihydroxylation of olefins using heterocyclic chiral ligands Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, water, an oxidant and an osmium-containing compound are combined. In the... | 05/14/1996 |
| 5344946 | Process for the preparation of vicinal diols and/or epoxides The present invention provides a process for the preparation of vicinal diols and/or epoxides by the oxidation of olefinically-unsaturated compounds with the use of an inorganic heptavalent rhenium compound as catalyst and of hydrogen peroxide as oxidatio... | 09/06/1994 |
| 5268493 | Method of producing olefin oxide An -olefin oxide is produced with an enhanced reaction selectivity by a method in which an -olefin having 6 to 30 carbon atoms is epoxidized in an aqueous solution containing hydrogen peroxide, acetic acid, an acid catalyst, for example, sul... | 12/07/1993 |
| 5260461 | Ligands for ADH: cinchona alkaloids and moderately sized organic substituents linked through a planar aromatic spacer group Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, an aqueous solution, a base, a ferricyanide salt and an osmium-containin... | 11/09/1993 |
| 5227543 | Facilitation of turnover in the ADH by additives which catalyze the hydrolysis of the OS(VI) glycolate esters Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, water, an oxidant, an osmium-containing compound and an organic soluble ... | 07/13/1993 |
| 5210336 | Oxidation of olefin to glycol A process is provided for the conversion of an olefin to the corresponding glycol wherein a mixture of olefin, oxygen, carbon dioxide and water is reacted in a solvent at supercritical conditions with respect to the reaction mixture.... | 05/11/1993 |
| 5166372 | Epoxidation process Olefins are epoxidized by hydrogen peroxide in the presence of an organorhenium oxide catalyst and an alkyl aryl secondary alcohol solvent. High yields of epoxides with minimal non-selective loss of either hydrogen peroxide or olefin are realized. The epo... | 11/24/1992 |
| 5159123 | Synthesis of hydroxyl-terminated polybutadienes using glycol ether acetate solvents Disclosed is an improvement in a process for polymerizing 1,3-butadiene selectively to form relatively low molecular weight hydroxyl-terminated polybutadiene oligomers in the presence of an aqueous solution of hydrogen peroxide which comprises the use of ... | 10/27/1992 |
| 5126494 | Methods for catalytic asymmetric dihydroxylation of olefins Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, water, an oxidant and an osmium-containing compound are combined. In the... | 06/30/1992 |
| 5105028 | Separation of hetero-atom(s) containing hydrocarbons Process for preparing one or more hetero-atoms containing hydrocarbons by contacting one or more hydrocarbons with a plasma-generated system derived from a source containing hydrogen atoms(s) and at least one hetero-atom in which process the plasma-genera... | 04/14/1992 |
| 4825004 | Process for the production of alkane polyols A process for the production of alkane polyols and especially alkane triols where mono- and/or poly-epoxidized fatty acids and/or fatty acid esters and mixtures thereof, especially derivates of natural fatty acids, are reacted with short-chain alkane-carb... | 04/25/1989 |
| 4824969 | Process for preparing cyclic carbonate esters from olefins in a single reaction mixture A process for reacting in admixture, an olefin with oxygen, CO, and water, to form a cyclic alkylene carbonate, in the presence of a catalyst composition comprising a catalytically active osmium compound, copper containing co-catalyst I (e.g. CuBr2 | 04/25/1989 |
| 4683347 | Glycerine purification process The level of impurities such as glycerol-based acetals and/or ketals in glycerine, particularly glycerol-dimethylketal, is reduced by extraction of the glycerine with supercritical or near critical carbon dioxide.... | 07/28/1987 |
| 4562299 | Process for the preparation of vicinal diols soluble in water A process for the preparation of water-soluble vicinal diols by means of a direct catalytic hydroxylation of the corresponding olefines with H2 O2. An olefine possibly carrying functional groups inert under the reaction conditions, a... | 12/31/1985 |
| 4533773 | Process for hydroxylating olefins in the presence of an osmium oxide catalyst and carboxylate salt co-catalyst A process for hydroxylating olefins, such as ethylene or propylene, using an osmium oxide catalyst such as OsO4, a carboxylate salt co-catalyst, such as sodium acetate, and organic hydroperoxide oxidant is disclosed.... | 08/06/1985 |
| 4533772 | Process for directly hydroxylating olefins using an osmium-halide catalyst and oxygen oxidant The process for hydroxylating olefins with oxygen in the presence of water, an osmium-halide (e.g., OsBr3) catalyst and transition metal containing co-catalyst (CuBr2) is disclosed.... | 08/06/1985 |
| 4496778 | Process for the hydroxylation of olefins using molecular oxygen, an osmium containing catalyst, a copper Co-catalyst, and an aromatic amine based promoter A process directed to the hydroxylation of olefins by reacting said olefins in the presence of oxygen, water, and a catalyst composition comprising (i) a catalytically active osmium containing compound, (ii) a Co-catalyst I comprising a copper containing ... | 01/29/1985 |
| 4496779 | Process for the hydroxylation of olefins using molecular oxygen, an osmium containing catalyst, a copper co-catalyst, and a cycloaliphatic amine based promoter A process directed to the hydroxylation of olefins by reacting said olefins in the presence of oxygen, water, and a catalyst composition comprising (i) a catalytically active osmium containing compound, (ii) a Co-catalyst I comprising a copper containing ... | 01/29/1985 |
| 4486613 | Process for hydroxylating olefins using an osmium carbonyl catalyst A process for hydroxylating olefins, such as ethylene or propylene, using an oxidant selected from organic hydroperoxides, H2 O2, and oxygen and a catalyst composition comprising at least one osmium carbonyl catalyst, such as Os... | 12/04/1984 |
| 4482763 | Process for hydroxylating olefins in the presence of an osmium containing catalyst and organic halogenated hydrocarbon co-catalyst A process for hydroxylating olefins with an organic hydroperoxide and water in the presence of an osmium containing catalyst (e.g. OsO4) and an organic halogenated hydrocarbon co-catalyst (e.g., n-butyl iodide) is disclosed.... | 11/13/1984 |
| 4413151 | Process for hydroxylating olefins using a supported osmium catalyst A process for hydroxylating olefins using a supported osmium catalyst such as Os3 (CO)12 adsorbed on a support, such as MgO, and optionally in conjunction with a co-catalyst such as NaI, is disclosed.... | 11/01/1983 |
| 4410743 | Process for the preparation of 2,3-dimethylbutane-2,3-diol 2,3-Dimethylbutane-2,3-diol is prepared by a process in which 2,3-dimethylbutenes are reacted with oxygen or an oxygen-containing gas, in the presence of 0.01 to 20 parts by weight of water (relative to 2,3-dimethylbutenes employed), at temperatures of fr... | 10/18/1983 |
| 4393253 | Hydroxylation of olefins A method for preparing polyols such as diols by catalytic hydroxylation of an olefinic compound by reacting the olefinic compound with an organic hydroperoxide and water in the presence of a catalyst comprising osmium compound and a specific halide co-cat... | 07/12/1983 |
