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| Number | Title | Issue Date |
| 8044226 | Process for production of high-purity diaryl carbonate A high-purity diphenyl carbonate, wherein the diphenyl carbonate is unsubstituted or substituted with a lower hydrocarbon, and has a halogen content of not more than 0.1 ppm, a content of an intermediate boiling point material of not more than 100 ppm, and a content... | 10/25/2011 |
| 7812189 | Industrial process for production of high-purity diphenyl carbonate According to the present invention, there are provided a high boiling point material separating column A and a diphenyl carbonate purifying column B each comprising a continuous multi-stage distillation column having specified structures, and there is provided a spe... | 10/12/2010 |
| 7622601 | Process for production of high-purity diaryl carbonate A specific industrially useful process for the production of a high-purity diaryl carbonate in which a diaryl carbonate having low contents of intermediate boiling point and high boiling point impurities is produced is disclosed. As a starting material, a reaction m... | 11/24/2009 |
| 7435842 | Process for producing carbonic ester A method for producing a carbonic ester, comprising (1) performing a reaction between an organometal compound having a metal-oxygen-carbon linkage and carbon dioxide to obtain a reaction mixture containing a carbonic ester formed by the reaction, (2) separating the ... | 10/14/2008 |
| 7417161 | Continuous method for preparing aromatic carbonate using a heterogeneous catalyst and a reaction apparatus for the same The present invention relates to a continuous method for the preparation of an aromatic carbonate by reacting a dialkyl carbonate and an aromatic hydroxy compound in the presence of a heterogeneous catalyst, and a reaction apparatus for the same. The continuous meth... | 08/26/2008 |
| 7339070 | Method and apparatus for waste stream recovery A method for recovering a product mixture from a waste stream in a diaryl carbonate manufacturing process comprising reacting the waste stream with an alkyl alcohol to form a reaction mixture, and separating the product mixture from the reaction mixture. ... | 03/04/2008 |
| 7312352 | Method of preparing ester-substituted diaryl carbonates The present invention relates to an interfacial method of preparing ester-substituted diaryl carbonates. The method includes the steps of: forming a reaction mixture comprising phosgene, an ester-substituted phenol, an organic solvent, and a catalyst selected from t... | 12/25/2007 |
| 7297754 | Method for the preparation of aromatic chloroformates A method for preparing an aromatic chloroformate comprising, introducing a mixture of at least one aromatic hydroxyl compound, phosgene, at least one solvent, and at least one organic base into a flow reactor to obtain a unidirectionally flowing reaction mixture. Th... | 11/20/2007 |
| 7288526 | Dipeptide and related compounds which inhibit leukocyte adhesion mediated by VLA-4 Disclosed are compounds which bind VLA-4. Certain of these compounds aslo inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA-4. Such compounds are useful in the treatment of inflammatory diseases in a mammalian patient, e.g., human, su... | 10/30/2007 |
| 7287745 | Liquid-continuous column distillation Bubble columns fractionate with vapor-liquid mass transfer efficiencies approaching that of distillation towers when vapor velocities in excess of 50% of jet flood are used. If the vapor velocities are pushed above about 70% of jet flood then the distillation perfor... | 10/30/2007 |
| 7264749 | Alkyne compounds The present invention relates to alkyne compounds of the formula I P1—Y1-A1-Y3-(T1-B1-)m-T3-C≡C-T4-(B2-T2-)n-Y4 | 09/04/2007 |
| 7262209 | Carbonyloxy-cyanomethyl compounds as antiparasitic agents The invention relates to compounds of the general formula wherein Ar1, Ar2, R4, R5, R6, R7, R8, W, X, a and b have the significances gi... | 08/28/2007 |
| 7189869 | Method for making polycarbonate A method of making polycarbonates comprises melt-polymerizing an aromatic dihydroxy compound and a carbonic acid diester in a presence of a polymerization catalyst in a reactor system producing a byproduct stream, wherein the polymerization catalyst comprises a quat... | 03/13/2007 |
| 7183371 | Method for making polycarbonate A method of making polycarbonate comprises melt-polymerizing an aromatic dihydroxy compound and a carbonic acid diester in a presence of a polymerization catalyst in a reactor system producing a byproduct stream, wherein the polymerization catalyst comprises a quate... | 02/27/2007 |
| 7151189 | Method and apparatus for waste stream recovery A method for recovering a product mixture from a waste stream in a diaryl carbonate manufacturing process comprising reacting the waste stream with an alkyl alcohol to form a reaction mixture, and separating the product mixture from the reaction mixture. ... | 12/19/2006 |
| 7138438 | Polymeric nanoparticle formulations and their use for improving the dirt pick up resistance of a coating A formulation for repelling particulate matter on the surface of a coating comprising polymeric nanoparticles having a mean particle diameter of from 1 to 50 nm. The polymeric nanoparticles may further be functionalized to impart additional characteristics to modify... | 11/21/2006 |
| 7125814 | Bis-o-nitrophenols derivatives and poly-o-hydroxyamides, polybenzoxazoles, materials, and microelectronic devices made therefrom Materials for dielectrics and/or buffer layers in microelectronics utilize polymers can be based on bis-o-nitrophenols. The bis-o-nitrophenols carry a tert-butoxycarbonyl group on at least one of the hydroxyl groups. The polybenzoxazoles prepared from these compound... | 10/24/2006 |
| 7090814 | Method of synthesizing silicoaluminophosphate molecular sieves In a method of synthesizing a silicoaluminophosphate molecular sieve, a synthesis mixture is prepared by combining a source of phosphorus and at least one organic directing agent; and then cooling the combination of the phosphorus source and organic directing agent ... | 08/15/2006 |
| 7071283 | Reactive rectification The invention relates to a method for producing polycarbonate according to the method for the transesterification of molten mass whereby bis-(hydroxyaryl) compounds (bisphenols) and diaryl carbonates are reacted by means of reactive rectification. ... | 07/04/2006 |
| 7067610 | Method for producing polycarbonate An integrated method for producing aromatic polycarbonate, including the steps of: (1) making a liquid mixture of acetone and diphenylcarbonate; (2) transporting the liquid mixture of step (1) to a polycarbonate production plant; | 06/27/2006 |
| 7056855 | Liquid tetrabutyl ammonium phenolate formulation A process for preparing a formulation containing tetrabutylammonium phenolate and phenol is disclosed. The process entails combining a solution of tetrabutylammonium bromide in phenol with a solution of sodium phenolate to form a mixture, excess phenol is removed by... | 06/06/2006 |
| 6881856 | Thermoplastic polyurethane A thermoplastic polyurethane useful for elastomers, elastic fibers and artificial leathers contains a polyaddition product of a diisocyanate and a chain extender with a liquid polyethercarbonate diol which is a reaction product of a carbonate compound with a polyeth... | 04/19/2005 |
| 6703473 | Process for producing polycarbonate An improvement to the melt transesterification reaction of diaryl carbonate with dihydroxy aryl compound is disclosed. The improvement entails the following steps (i) introducing the resulting vapor stream at the mid-height of a first distillation column,... | 03/09/2004 |
| 6667341 | Delta dicarbonyl compounds and methods for using the same Amidomethyl esters, carbonylmercaptomethyl esters, keto-containing esters, amidomethyl thioesters, amidomethyl amides, and methylene dithioesters are disclosed. The novel compounds have two carbonyl groups connected by a linking moiety having an oxygen, s... | 12/23/2003 |
| 6600061 | Method for the continuous production of aromatic carbonates The present invention provides a method for making aromatic carbonates. In this method, an aryl alcohol is reacted with a dialkyl carbonate in a reactor (e.g., a distillation column) to produce an arylalkyl carbonate and diaryl carbonate. The total yield ... | 07/29/2003 |
| 6596894 | Method for the continuous production of aromatic carbonates The present invention provides a method for making aromatic carbonates. In this method, an aryl alcohol is reacted with a dialkyl carbonate in a reactor (e.g., a distillation column) to produce an arylalkyl carbonate and diaryl carbonate. In one embodimen... | 07/22/2003 |
| 6596895 | Method for the continuous production of poly carbonates The present invention provides a method for making polycarbonates. One embodiment of the method comprises reacting diphenylcarbonate with a dihydric phenol. The diphenylcarbonate is made by reacting a reaction mixture comprising aryl alcohol together with... | 07/22/2003 |
| 6548445 | Supported catalysts containing a platinum metal and process for preparing diaryl carbonates In the process for preparing an aromatic carbonate from an aromatic hydroxy compound, CO and O2 in the presence of a quaternary salt and a base using a platinum metal catalyst and a cocatalyst, use is advantageously made of supported catalysts ... | 04/15/2003 |
| 6465457 | Carbonate, carbamate, thiocarbonate dithiocarbonate and thiocarbomate derivatives useful as fungicides Fungicidal compounds of formula (I): ##STR1## wherein W is CH3 O.CH.dbd.CCO2 CH3, CH3 ON.dbd.CCONR3 R4 or CH3 ON.dbd.CCO2 CH3 and stereoisomers thereof; n i... | 10/15/2002 |
| 6423863 | Method of sustaining catalyst activity in the catalytic production of aromatic carbonates The present invention is directed to a method for sustaining the catalytic activity of a carbonylation catalyst composition, after changes in reactor pressure and temperature, in the catalytic production of aromatic carbonates.... | 07/23/2002 |
| 6423862 | Synthesis of vinyl carbonates for use in producing vinyl carbamates A method for making a vinyl carbonate represented by the formula (I): CH2.dbd.CHOC(O)X1 R1 (I) wherein X1 is oxygen or sulfur and R1 is a substituted or an unsubstituted aliphatic alkyl, aryl, aryl alkyl, olef... | 07/23/2002 |
| 6388146 | Polymerizable compound, polymerizable resin composition, cured polymer and liquid crystal display device The polymerizable compound of this invention is represented by general formula (I): ##STR1## where R is H, R', R'O, R'COO, or R'OCO, R' is a linear or branched alkyl group or alkenyl group having 1 to about 15 carbon atoms, A1 and A2 | 05/14/2002 |
| 6372683 | Method and catalyst system for producing aromatic carbonates A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbo... | 04/16/2002 |
| 6355824 | Catalyst system for producing aromatic carbonates A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbo... | 03/12/2002 |
| 6310229 | Lead halophenoxides and carbonylation catalyst and method for preparing and employing them Lead halophenoxides, especially bromophenoxides, are prepared by the reaction of lead(II) oxides with a hydroxyaromatic compound such as phenol and a chloride or bromide salt such as an alkali metal bromide, a tetraalkylammonium bromide or a bexaalkylguan... | 10/30/2001 |
| 6310232 | Method for recycle of bromide-containing catalyst constituents Bromide source such as alkali metal bromide, alkaline earth metal bromide, or onium bromide, present as part of a catalyst mixture in an organic oxidative carbonylation mixture further comprising diaryl carbonate and a hydroxyaromatic compound, is often a... | 10/30/2001 |
| 6284911 | Synthesis of vinyl carbonates for use in producing vinyl carbamates A method for making a vinyl carbonate represented by the formula (I): CH2.dbd.CHOC(O)X1 R1 (I) wherein X1 is oxygen or sulfur and R1 is a substituted or an unsubstituted aliphatic alkyl, aryl, aryl alkyl, olef... | 09/04/2001 |
| 6172254 | Catalyst composition and method for producing diaryl carbonates using nitrile as promoter Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIIIB metal, preferably palladium; an alkali metal or alkaline earth metal halide, preferably sodium bromide;... | 01/09/2001 |
| 6169197 | Process for separation between dialkyl carbonate and alkyl carbamate A process for separation between dialkyl carbonate and alkyl carbamate which comprises adding an aromatic hydroxy compound to a liquid comprising alkyl carbamate having an alkyl group having 3 to 6 carbon atoms and dialkyl carbonate having alkyl group hav... | 01/02/2001 |
| 6153696 | Process for forming carbonates of hydroxyaromatic compounds A process for the stoichiometric carbonation of a hydroxyaromatic material is provided which comprises the steps of (a) mixing together in a reaction vessel (1) a hydroxyaromatic material, (2) a sufficient amount of a dialkyl dicarbonate to give the desir... | 11/28/2000 |
