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| Number | Title | Issue Date |
| 8071792 | High-purity vinylene carbonate and a method of purifying vinylene carbonate The present invention relates to the technical purification of vinylene carbonate (VC) by means of a simple thermal treatment with organic compounds which possess amidic nitrogen-hydrogen bonds, followed by a distillation and a melt crystallization. In this way VC o... | 12/06/2011 |
| 7999122 | Method of purifying vinylene carbonate The present invention relates to the industrial purification of vinylene carbonate (VC). It was found that it is advantageous to subject the VC to be purified, before the purifying distillation, to a simple thermal treatment with organic compounds which have ... | 08/16/2011 |
| 7674919 | Process for the preparation of alkylene carbonate A process for the preparation of an alkylene carbonate, said process comprising contacting the corresponding alkylene oxide with carbon dioxide in the presence of water and in the presence of a catalytic composition comprising an organic base neutralized with a hydr... | 03/09/2010 |
| 7501531 | Process for the preparation of alkylene carbonate A process for the preparation of an alkylene carbonate, said process comprising contacting the corresponding alkylene oxide with carbon dioxide in the presence of a metal salt immobilised on a solid support, wherein the metal salt comprises a cation of a metal selec... | 03/10/2009 |
| 7488835 | Process for the preparation of alkylene carbonates A process for the catalytic carboxylation of alkylene oxides with carbon dioxide, in the presence of a catalyst composition and water, wherein the catalyst composition comprises an alkali metal halide and a macrocyclic chelating compound. ... | 02/10/2009 |
| 7456299 | Process for the production of alkylene carbonate and use of alkylene carbonate thus produced in the manufacture of an alkane diol and a dialkyl carbonate An alkylene carbonate is produced by the reaction of an alkylene oxide with carbon dioxide in the presence of a phosphonium compound as catalyst in a process in which (a) the alkylene oxide, carbon dioxide and the phosphonium catalyst are continuously i... | 11/25/2008 |
| 7354771 | Method of determining absolute configuration of chiral compound The absolute configuration of a chiral compound is determined by (i) coordinating the chiral compound to a metalloporphyrin having a carbon chain-crosslinked porphyrin dimer structure in which one of the two porphyrin rings has at least one ethyl or substituent bulk... | 04/08/2008 |
| 7342141 | Process for the preparation of alkanediol The invention provides a process for the preparation of alkanediol comprising the steps: (i) contacting alkylene oxide with carbon dioxide in the presence of a carbonation catalyst to obtain a reaction mixture containing alkylene c... | 03/11/2008 |
| 7220870 | Hydrolytic kinetic resolution of cyclic substrates The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisome... | 05/22/2007 |
| 7199253 | Method of manufacturing alkylene carbonate A process for producing an alkylene carbonate, which comprises reacting an alkylene oxide with carbon dioxide in the presence of a catalyst in a reactor to obtain a reaction mixture containing an alkylene carbonate, the reactor communicating with a process-side chan... | 04/03/2007 |
| 7199252 | Process for α,β-dihydroxyalkenes and derivatives Disclosed is a process wherein a first olefin selected from certain α,β-dihydroxyalkenes and 4-(alkenyl)ethylenecarbonates is reacted with a second olefin reactant to produce an olefin metathesis product. When the first olefin reactant is an optically enriched or ... | 04/03/2007 |
| 7161046 | Process for the preparation of alkylene glycols Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst is a SALEN-type compound which conta... | 01/09/2007 |
| 7112633 | Preparation of a compound containing cyclic and linear carbonate groups The invention relates to a process for the preparation of compound(s) comprising at least one acrylate or methacrylate group, at least one linear carbonate group and at least one 5-membered cyclic carbonate group. The process comprises (A) a selective ring-opening s... | 09/26/2006 |
| 7109343 | Metal catalysts and methods for making and using same Compounds having the formula: are disclosed. M1 and M2 are the same or different and are transition metal atoms or ions; Z2 and Z3, independently, are the atoms necessa... | 09/19/2006 |
| 7084292 | Integrated process for preparing dialkyl carbonates with a circulating catalyst An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a homogeneous carbon... | 08/01/2006 |
| 7078432 | Process for the preparation of the 14β-hydroxy-baccatin III-1,14-carbonate A process for the preparation of 14β-hydroxy-baccatin III-1,14-carbonate useful for the preparation of novel taxane derivatives with antitumor activity. ... | 07/18/2006 |
| 7078539 | Carbonate decolorization The color of organic carbonate such as ethylene carbonate or propylene carbonate is substantially improved by ultraviolet irradiation. ... | 07/18/2006 |
| 7057057 | Histone deacetylase inhibitors based on alpha-ketoepoxide compounds Histone deacetylase is a metallo-enzyme with zinc at the active site. Compounds having a zinc-binding moiety, for example, an alpha-ketoepoxide group, such as an alpha-ketothio group, can inhibit histone deacetylase. Histone deacetylase inhibition can repress gene e... | 06/06/2006 |
| 7026075 | Nonaqueous electrolyte battery and nonaqueous electrolytic solution The present invention achieves an increased capacity and prolonged life of nonaqueous electrolyte batteries of the type in which light metals, such as magnesium, calcium or aluminum, are used in the negative electrode. The present invention also provides a thermally... | 04/11/2006 |
| 7005496 | Production of trimethylene carbonate from poly (trimethylene carbonate) by wiped film reactive evaporation A method for producing trimethylene carbonate poly(trimethylene carbonate which comprises (a) introducing liquid poly(trimethylene carbonate) and an optional catalyst into a wiped film evaporator reactor under a vacuum about 15 kPa or less, said reactor having walls... | 02/28/2006 |
| 6946055 | Method for recovering an organic solvent from a waste stream containing supercritical CO2 An organic solvent is separated from a waste stream containing supercritical CO2, an organic solvent and etchant contaminants. The process includes separating the supercritical CO2 by subjecting the waste stream to elevated temperature and/or r... | 09/20/2005 |
| 6933394 | Catalyst for synthesizing alkylene carbonate The present invention provides an alkylene-carbonate synthesis catalyst comprising a compound insoluble to one phase containing alkylene carbonate produced when the alkylene oxide and carbon dioxide are reacted with the catalyst and soluble to the other phase substa... | 08/23/2005 |
| 6924379 | Process for preparation of cyclic carbonate A catalytic system comprising of Zinc-substituted polyoxometalate, Na12[WZn3(H2O)2(ZnW9O34)2].48H2O and a Lewis base has been discovered to be efficient for chemical fixation of ... | 08/02/2005 |
| 6861537 | Tricyclic and tetracyclic taxane intermediates The synthesis of taxol and other tricyclic and tetracyclic taxanes. ... | 03/01/2005 |
| 6841667 | Nucleophilic kinetic resolution of cyclic substrates using silyl azides The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisome... | 01/11/2005 |
| 6800766 | Hydrolytic kinetic resolution of cyclic substrates The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisome... | 10/05/2004 |
| 6781006 | Active catalysts for stereoselective ring-opening reactions A method for making a chiral transition metal-ligand catalyst complex that is active in catalyzing stereoselective ring opening reactions includes contacting an asymmetric tetradentate ligand, in an excess of a Brønsted acid, with a salt of a first row transition m... | 08/24/2004 |
| 6703513 | Production and use of derivatized homoserine lactones The present invention provides analogues of autoinducer molecules that are derivatized to allow their attachment to other molecules and surfaces. Libraries of the autoinducer analogues are also contemplated. Also provided are methods for using the compoun... | 03/09/2004 |
| 6673212 | Polymerization-inhibited distillation Identified herein are inhibitors which may be added to the boiling pot portion of a distillation apparatus prior to or during the distillation of an alkylene carbonate. The inhibitors retard the occurrence of undesirable reactions of the alkylene carbonat... | 01/06/2004 |
| 6586605 | Purification of alkylene carbonate The invention is a method to purify an alkylene carbonate such as propylene carbonate by contact with at least two solid adsorbents comprising carbon and an inorganic silicon or aluminum oxide. The purification method successfully improves color and color... | 07/01/2003 |
| 6476237 | Purification of alkylene carbonates Provided herein is a process for producing alkylene carbonates of ultra-high purity. According to the present invention, certain stages of traditional distillation of alkylene carbonate distillation are replaced by carbon treatment. Alkylene carbonates pr... | 11/05/2002 |
| 6458969 | Process for the purification of alkylene carbonate This invention concerns a process to provide high purity alkylene carbonate though use of multiple distillations wherein the unused fractions are recycled to the reactor. The high purity alkylene carbonate may be further purified by use of carbon to produ... | 10/01/2002 |
| 6448414 | Hydrolytic kinetic resolution of cyclic substrates The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a ... | 09/10/2002 |
| 6403777 | Metalloligands for cleaving nucleic acids Transition metal complexes, referred to hereinafter as "metalloligands", that catalyze the degradation of DNA and the cleavage of RNA at select sites are provided. In one embodiment, the metalloligand has the following structure: ##STR1## wherein R1 ... | 06/11/2002 |
| 6387223 | Alkylene carbonate process This invention concerns a process to provide high purity akylene carbonate though use of multiple distillations wherein the unused fractions are recycled to the reactor.... | 05/14/2002 |
| 6384240 | Process for the purification of alkylene carbonate This invention concerns a process to provide high purity alkylene carbonate though use of multiple distillations wherein the unused fractions are recycled to the reactor. The high purity alkylene carbonate may be further purified by use of carbon to produ... | 05/07/2002 |
| 6265592 | Method for the continuous production of 1,3-dioxolan-2-ones A process for the continuous production of 1,3-dioxolan-2-ones such as ethylene carbonate or propylene carbonate by reacting a corresponding oxirane with carbon dioxide in the liquid phase in the presence of a catalyst comprises conducting the reaction in... | 07/24/2001 |
| 6262278 | Stereoselective ring opening reactions The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a ... | 07/17/2001 |
| 6258962 | Process for producing alkylene carbonates A process for the synthesis of alkylene carbonates, such as ethylene carbonate, by reacting alkylene oxides with carbon dioxide in the presence of a porous solid support catalyst containing an alkali or alkaline earth metal component.... | 07/10/2001 |
| 6187965 | Process for recovering high boiling solvents from a photolithographic waste stream comprising at least 10 percent by weight of monomeric units A method of recovering benzyl alcohol, gamma butyrolactone, or propylene carbonate from an impure effluent stream of an industrial process is provided. The effluent waste stream contains greater than about 10 percent by weight of monomeric units that are ... | 02/13/2001 |
