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8148566 |
Method for producing a dialkyl carbonate and a diol
A method for producing a dialkyl carbonate and a diol, comprising: (a) effecting a transesterification reaction between a cyclic carbonate and an aliphatic monohydric alcohol in the presence of a...
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8088686 |
Method of remedying deterioration of insulating film
The present invention provides a method of remedying deterioration of an insulating film which, during the remedial treatment of an insulating film deteriorated by plasma treatment, does not leave...
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8058465 |
Process for industrially producing dialkyl carbonate and diol
A process for industrially producing dialkyl carbonate and a diol continuously through a reactive distillation system is disclosed. The process includes the steps of taking a cyclic carbonate and...
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8049028 |
Industrial process for separating out dialkyl carbonate
It is an object of the present invention to provide a specific apparatus and process for using a single distillation column on a low boiling point reaction mixture containing a large amount of a...
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8022241 |
Processes 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...
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7919645 |
High shear system and process for the production of acetic anhydride
A system and method for a high shear mechanical device incorporated into a process for the production of acetic anhydride as a reactor device is shown to be capable of decreasing mass transfer...
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7884251 |
Industrial process for separating out by-produced alcohols
It is an object of the present invention to provide a specific industrial separation process that enables an alcohol to be separated out efficiently and stably for a prolonged period of time from a...
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7803961 |
Process for manufacturing dimethyl carbonate
A method of forming a dialkyl carbonate stream, includes obtaining a byproduct stream from a diaryl carbonate formation reaction that has alkanol, residual dialkyl carbonate, and residual aromatic...
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7799939 |
Process for production of dialkyl carbonate and diol
It is an object of the present invention to provide, for a case of producing a dialkyl carbonate and a diol from a cyclic carbonate and an aliphatic monohydric alcohol, a process that...
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7799940 |
Process for manufacturing dimethyl carbonate
The present invention provides methods of forming dialkyl carbonate wherein catalyst buildup in the reaction equipment, the separation equipment, and transfer lines there between is reduced and...
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7790914 |
Method for dimethyl carbonate synthesis
There is provided a catalyst for dimethyl carbonate synthesis which has a high conversion rate under the supercritical condition of CO2 and can be handled easily. The catalyst for dimethyl...
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7763745 |
Process for the production of dialkyl carbonate and alkanediol
An alkylene carbonate and an alkanol are subjected to transesterification to yield a dialkyl carbonate and alkanediol in a process comprising (a) introducing the alkylene carbonate and an alkanol...
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7732630 |
Process for the preparation of an alkanediol and a dialkyl carbonate
An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) reacting an alkylene carbonate and an alkanol feedstock in a reaction zone under transesterification conditions to...
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7718820 |
Process for the preparation of an alkanediol and a dialkyl carbonate
An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) reacting an alkylene carbonate and an alkanol feedstock in a first reaction zone under transesterification conditions...
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7652122 |
Method for producing an aromatic carbonate
A method for producing an aromatic carbonate, comprising: (1) performing a reaction between an organometal compound and carbon dioxide to obtain a reaction mixture containing a dialkyl carbonate...
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7645896 |
Method for producing a dialkyl carbonate and a diol
A method for producing a dialkyl carbonate and a diol, comprising: (a) effecting a transesterification reaction between a cyclic carbonate and an aliphatic monohydric alcohol in the presence of a...
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7622602 |
Method for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates
A method of making a dialkyl carbonate comprises: reacting, in a reactor comprising tantalum, an alkanol, oxygen, and carbon monoxide, in the presence of a catalyst. The reaction occurs in a...
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7605285 |
Method and device for manufacturing dimethyl carbonate
The present invention provides a method and apparatus for producing dimethyl carbonate, wherein carbon dioxide is recovered from combustion exhaust gas of a steam reformer 10 and a boiler; and some...
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7598411 |
Processes 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...
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7563919 |
Process for the preparation of an alkanediol and a dialkyl carbonate
An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) contacting an alkylene carbonate with an alkanol feedstock under transesterification conditions in a reactive...
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7541482 |
Process for production of alkyltin alkoxides
A process for the production of alkyltin alkoxides which comprises subjecting at least one alkyltin compound selected from among organotin compounds having tin-oxygen-tin linkages as the starting...
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7531616 |
Process for industrial production of an aromatic carbonate
It is an object of the present invention to provide a specific process that enables aromatic carbonates to be produced with high selectivity and high productivity stably for a prolonged period of...
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7518012 |
Process for the preparation of dialkyl carbonate
The present invention provides a process for the preparation of dialkyl carbonates of general formula (1) wherein R=alkyl (C1-C8) or C6H5CH2 the said process comprises a reaction in between cyclic...
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7514521 |
Method for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates
Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An...
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7504527 |
Low corrosive integrated process for preparing dialkyl carbonates
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...
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7462336 |
Apparatus for preparing a dialkyl carbonate
An apparatus for preparing a dialkyl carbonate comprises means for reacting an alkanol, oxygen, carbon monoxide, and a catalyst to form a mixture comprising a dialkyl carbonate, an alkyl...
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7453007 |
Process for the production of unsymmetric and/or symmetric dialkyl carbonates and diols
A process for the production of a dialkyl carbonate and a diol, such as dimethyl carbonate and ethylene glycol, by reacting a feed containing a cyclic carbonate, a hydroxy alkyl carbonate and an...
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7385070 |
Method for the catalytic conversion of alkylene carbonate
A method for catalytic conversion of alkylene carbonate, wherein alkylene carbonate is contacted with C1-C5 aliphatic alcohol and/or water in the presence of Mg, Al mixed (hydr) oxide catalyst...
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7351848 |
Method and apparatus for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates
Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An...
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7094917 |
Processes 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...
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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...
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7049457 |
Use of an ionic halide free copper catalyst for the production of dialkyl carbonates
A non-corrosive process for the preparation of dialkyl carbonate by reacting carbon monoxide, alkanol and an oxygen-containing gas in the presence of a ionic halogen free copper catalyst.
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6989459 |
In situ process for preparing quaternary ammonium bicarbonates and quaternary ammonium carbonates
Applicant has discovered an in situ method of preparing quaternary ammonium methocarbonate salts and quaternary ammonium alkylcarbonate salts in high yield from tertiary amines, methanol, and at...
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6977308 |
Method and apparatus for preparing a dialkyl carbonate
A method of preparing a dialkyl carbonate includes reacting an alkanol, oxygen, carbon monoxide, and a catalyst to form a mixture that includes a dialkyl carbonate and an alkyl chloroformate. The...
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6897343 |
Process for the preparation of propanediol
The invention relates to a process for the preparation of 1,2-propanediol from propylene oxide, which process involves contacting propylene oxide with carbon dioxide in the presence of a...
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6844287 |
Supported catalysts for the fixation of carbon dioxide into aliphatic polycarbonates and a process for preparing the same
The present invention provides a process for preparing supported zinc dicarboxylate catalysts with high activity for the copolymerization of carbon dioxide and epoxides by supporting zinc...
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6835858 |
Catalytic 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...
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6768020 |
Method for the catalytic conversion of organic carbonate and the use of a lanthanum catalyst therefor
A method for the catalytic conversion of organic carbonate, wherein organic carbonate is contacted with alcohol and/or water in the presence of a lanthanum catalyst comprising at least about 7 wt....
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6683112 |
Gabapentin prodrugs and formulations
The present invention relates to novel prodrugs of gabapentin and to pharmaceutical formulations and sustained release formulations containing the prodrugs.
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6620958 |
Use of membranes to separate organic liquids having different polarities
A method for separating at least one lower polarity fluid from a mixture of fluids having varying polarity, comprising contacting at least one low polarity or non-polar polymeric membrane with the...
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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...
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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...
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6573396 |
Co-production of dialkyl carbonates and diols with treatment of hydroxy alkyl carbonate
A process for the production of a dialkyl carbonate and a diol from a cyclic carbonate and an aliphatic monohydric alcohol wherein the cyclic carbonate and aliphatic monohydric alcohol are reacted...
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6479689 |
Process for continuously producing dialkyl carbonate and diol
A method for continuously producing a dialkyl carbonate and a diol, comprising: (1) continuously feeding a cyclic carbonate and an aliphatic monohydric alcohol to a continuous multi-stage...
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6469071 |
Radiation curable acrylate-terminated polymers having polycarbonate repeating units
Polyester based polycarbonate (meth)acrylates prepared by the reaction of a alkylene or arylene diol polycarbonate with an anhydride or its dicarboxylic acid to form a carboxyl terminated diester,...
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6452036 |
Synthesis of dialkyl carbonates
The invention generally concerns methods for the synthesis of dialkyl carbonates, and more specifically dimethyl carbonate (DMC) and diethyl carbonate (DEC). Methods according to the invention...
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6392078 |
Process and catalyst for making dialkyl carbonates
A process for producing dialkyl carbonates, such as dimethyl carbonate, from the reaction of a primary alcohol with urea in the presence of a catalyst which is a complex compound represented by...
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6365767 |
Process for co-production of dialkyl carbonate and alkanediol
A method is provided for co-producing dialkyl carbonate and alkanediol by reacting alkylene carbonate with alkanol in the presence of a zeolite catalyst which contains alkali metal, alkaline earth...
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6359163 |
Process for producing dialkyl carbonate
A process for producing a dialkyl carbonate which comprises performing reaction of allophanate represented by the following general formula (1) and an alkyl alcohol represented by the following...
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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...
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