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Class 558/274 - Two benzene rings bonded directly to the -O-C(=O)O- group (i.e., diaryl carbonates)


Subclass of Class 558 - Organic compounds -- part of the class 532-570 series
Definition: Compounds wherein the -O-C(=O)O- group is bonded
No. of patents: 253
Last issue date: 10/18/2011


1              
NumberTitleIssue Date
8039659Processes for preparing diaryl and/or alkylaryl carbonates from dialkyl carbonates
Processes comprising: reacting a dialkyl carbonate and an aromatic hydroxy compound in the presence of a transesterification catalyst in a first reaction column, the first reaction column comprising a top section, a bottom section, a rectifying section in an upper p...
10/18/2011
8034967Method of preparing a purified ester-substituted phenol stream
A method of producing a purified ester-substituted phenol stream is provided. The method includes a first step of obtaining from a melt transesterification reaction a byproduct stream containing a residual ester-substituted diaryl carbonate, an ester-substituted phe...
10/11/2011
8022240Processes for purifying diaryl carbonates
Processes comprising: transesterifying a dialkyl carbonate and an aromatic hydroxyl compound in the presence of a transesterification catalyst to provide a diaryl carbonate product comprising the transesterification catalyst as an impurity; subjecting the diaryl car...
09/20/2011
8003817Process for the preparation of diaryl carbonates or arylalkyl carbonates from dialkyl carbonates
The invention provides a process for the preparation of diaryl carbonates and/or alkylaryl carbonates from dialkyl carbonates and aromatic hydroxy compounds using one or more intermediate condensers for improving heat integration. ...
08/23/2011
7919644Process for producing an aromatic carbonate
A process for producing an aromatic carbonate, which comprises the steps of: (I) transesterifying a starting material selected from the group consisting of a dialkyl carbonate, an alkyl aryl carbonate and a mixture thereof with a reactant selected from the group con...
04/05/2011
7851645Process for continuous production of organic carbonates or organic carbamates and solid catalysts therefore
Processes for the alcoholysis, inclusive of transesterification and/or disproportionation, of reactants are disclosed. The alcoholysis process may include feeding reactants and a trace amount of soluble organometallic compound to a reactor comprising a solid alcohol...
12/14/2010
7777067Industrial process for production of an aromatic carbonate
It is an object of the present invention to provide, for the case of continuously producing aromatic carbonates containing a diaryl carbonate as a main product by taking an alkyl aryl carbonate as a starting material, which is obtainable through a transesterificatio...
08/17/2010
7732629Process for the preparation of diaryl carbonate
The invention relates to a process for the preparation of a diaryl carbonate by transesterification of an aromatic alcohol with a dialkyl carbonate in the presence of a transesterification catalyst during a period of time [ta], in which the a...
06/08/2010
7629485Process for producing aromatic carbonate
Production of an aromatic carbonic ester through an ester exchange reaction between a starting material and a reactant while distilling by-product alcohols and/or by-product dialkyl carbonates off the reaction system, wherein use is made of a specified catalyst....
12/08/2009
7598411Processes for producing carbonic ester and producing polycarbonate
A process for producing a carbonic ester, characterized in that an aromatic monohydroxy compound or an aliphatic monohydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound hav...
10/06/2009
7518011Method 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...
04/14/2009
7417161Continuous 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
7378540Process for producing organic carbonates
A process for producing various organic carbonates by performing transesterification and disproportionation reactions in dual vapor/liquid phase mode preferably in the presence of solid catalyst composition selected from the group consisting of oxides, hydroxides, o...
05/27/2008
7358391Process for the synthesis of hydroxy aromatic acids
Hydroxy aromatic acids are produced in high yields and high purity (>95%) from halogenated aromatic acids in a reaction mixture containing a copper source and a ligand that coordinates to copper. ...
04/15/2008
7355070Process for the synthesis of 2,5-dihydroxyterephthalic acid
2,5-dihydroxyterephthalic acid is produced in high yields and high purity from 2,5-dihaloterephthalic acid by contact with a copper source and a ligand that coordinates to copper under basic conditions. ...
04/08/2008
7342141Process 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
7339070Method 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
7312352Method 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
7297754Method 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
7288668Process for making diaryl carbonate
Diphenyl carbonate is produced by reacting phenol with diethyl carbonate in a series of fixed bed reactors each of which is connected at different position on a distillation column via side draw and return streams. The composition of material in a distillation colum...
10/30/2007
7285679Oxidation of alkanes
Alkanes are oxidised to oxygenates such as carboxylic acids with molecular oxygen employing a two component catalyst system which uses a liganded heavy metal compound and a mixed metal oxide. ...
10/23/2007
7151189Method 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
7141641Method and apparatus for production of alkyl aryl ether and diaryl carbonate
A method and apparatus for continuously producing an alkyl aryl ether and a diaryl carbonate by reacting a dialkyl carbonate and an aromatic alcohol in presence of a transesterification catalyst. ...
11/28/2006
7102274Piezoelectric device and its manufacturing method
A piezoelectric device includes a first electrode film, a second electrode film, and a piezoelectric thin film enclosed by the first electrode film and second electrode film, in which the piezoelectric thin film is an oxide piezoelectric thin film having an oxygen d...
09/05/2006
7094917Processes for refining compositions containing dialkyl carbonates
Processes for refining dialkyl carbonate-containing compositions are described, wherein a composition comprising a dialkyl carbonate is provided; and the composition is subjected to a rectification wherein low-boiling impurities are removed, and a rectification wher...
08/22/2006
7091152Catalyst composition comprising a heteropoly acid, zinc, and a support component and processes therefor and therewith
A process of contacting at least one isoparaffin and at least one C5 olefin in the presence of a catalyst composition under conversion conditions to provide for converting the at least one isoparaffin and the at least one C5 olefin is provided....
08/15/2006
7091370Process for the preparation of diaryl carbonates
A process for the preparation of an aromatic carbonate is disclosed. The process entails reacting an aromatic hydroxy compound of the formula R—(O—H)k, with carbon monoxide and oxygen, optionally in a solvent and in the presence of catalyst components...
08/15/2006
7084291Water resistant catalyst for the production of diaryl carbonates via the direct carbonylation of phenolic compounds
A method of increasing the amount of diphenylcarbonate produced per amount of catalyst consumed in a phenol carbonylation process is described. Phenolic carbonylation produces water as a reaction product which reduces the turnover number (TON) of the catalyst. A mix...
08/01/2006
7074968Continuous process for the preparation of polytrimethylene ether glycol
The invention is a continuous process for the preparation of polytrimethylene ether glycol from 1,3-propanediol reactant. In addition, the invention is directed to a continuous multi-stage process comprising reacting at least one reactant in a liquid phase in an up-...
07/11/2006
7056855Liquid 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
RE38995Interfacial method of preparing ester-substituted diaryl carbonates
High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of methyl salicylate with phosgene in the presence of a phase transfer catalyst (PTC) in an interfacial reaction system in which the pH of the aq...
02/28/2006
6946574Method for preparing carboxylic acids by palladium carbonylation
The present invention relates to a process for the preparation of β- or γ-unsaturated or saturated carboxylic acids. It relates more particularly to the hydroxycarbonylation of an organic compound comprising a conjugated unsaturation, such as butadiene, by ...
09/20/2005
6914149Separation of impurities and/or valuable substances from solutions containing diaryl carbonate by solution crystallization
A process for the separation a substantially adduct-free diaryl carbonate from reaction solution is disclosed. The process entails obtaining a solution that contains diaryl carbonate, catalyst system components and an aromatic solvent, lowering the temperature of th...
07/05/2005
6891015Solventless preparation of ester-substituted diaryl carbonates
High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of ester-substituted phenols with phosgene in the presence of a phase transfer catalyst (PTC) and optionally a tertiary amine catalyst in a solve...
05/10/2005
6881856Thermoplastic 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
6852872Process for producing diaryl carbonates
A process for producing diaryl carbonate is disclosed. The process entails forming a reaction mixture wherein reacting are an aromatic hydroxy compound corresponding to the formula R—O—H  (II), wherein R denotes a C6-22-aromati...
02/08/2005
6835858Catalytic conversion of an organic carbonate
The invention relates to a method for the catalytic conversion of organic carbonate to the corresponding alcohol, wherein the organic carbonate is contacted with alcohol and/or water in the presence of a zinc supported catalyst. ...
12/28/2004
6800779Method for producing aromatic carbonates
A method for economically producing aromatic carbonates from aromatic hydroxy compounds is disclosed which in one embodiment comprises the steps of: (i) contacting at a temperature sufficient to keep the mixture molten at least one aromatic hydroxy compound with a c...
10/05/2004
6734319Separation of impurities and/or valuable substances from solutions containing diaryl carbonate by solution crystallization
A process for the separation a substantially adduct-free diaryl carbonate from reaction solution is disclosed. The process entails obtaining a solution that contains diaryl carbonate, catalyst system components and an aromatic solvent, lowering the temperature of th...
05/11/2004
6720443Catalyst and process for the preparation of aromatic carbonates
Aromatic carbonates can be prepared economically and efficiently by reacting an aromatic hydroxy compound with carbon monoxide and oxygen in the presence of a catalyst wherein a palladium compound is supported on a perovskite-type composite oxide represented by the ...
04/13/2004
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