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WO/2000/066534A1 |
A method and catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a method of carbonylating aromatic hydroxy compounds by contacting at least on...
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WO/2000/066536A1 |
A method and catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a method of carbonylating aromatic hydroxy compounds by contacting at least on...
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WO/2000/066533A1 |
A method and catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a method of carbonylating aromatic hydroxy compounds by contacting at least on...
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WO/2000/064853A2 |
This invention relates to a method of separating methanol and dimethyl carbonate in a distillation column through extractive distillation. The extractive distillation is conducted in the presence of an extractive distillation agent which...
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WO/2000/059859A1 |
A method for the production of aliphatic fluoroformates, wherein carbonyl fluoride is made to react with aliphatic alcohol in the presence of sodium fluoride in ether at a temperature of -20° to 50 °C. The method is carried out using c...
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WO/2000/053565A1 |
A process for preparing organic carbonates, such as dimethyl carbonate, without the use of phosgene and with a high yield and selectivity to the desired carbonate, by reacting a formaldehyde-acetal with a source of oxygen, in the presenc...
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WO/2000/052077A1 |
A process in which a recovered phenol compound obtained in polycarbonate production with a specific polycondensation catalyst is subjected as a starting material to transesterification and decarbonylation to produce a diaryl carbonate wh...
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WO/2000/051954A1 |
A process for continuously producing a dialkyl carbonate and a diol which comprises: a step (1) in which a cyclic carbonate and an aliphatic monohydric alcohol are continuously fed to a continuous multi-stage distillation tower in the pr...
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WO/2000/051964A1 |
The invention relates to a method of preparing an aryl chloroformate of formula (I) wherein n is an integer from 1 to 5, and R¿1? represents hydrogen, a branched or unbranched alkyl group having from 1-15 carbon atoms, an aryl group whi...
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WO/2000/050389A1 |
A method of preparing carbamates of the general formula RR'-N-CO¿2?-R'' by reacting an amine with carbon dioxide and an organic electrophile in an anhydrous solvent in the presence of a cesium base, whereby carbamate synthesis is accomp...
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WO/2000/047314A1 |
The invention relates to a device for mixing and reacting multiphase gaseous and liquid mixtures. Homogenous liquid solutions which cannot be mixed homogeneously are brought into intensive contact with homogenous solutions in which sever...
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WO/2000/047544A1 |
The invention relates to a method for preparing symmetrical and asymmetrical carbonates of the general formula (I) by reacting alcohols of the general formula (II) and alkyl or aryl halides of the general formula (III) with carbon dioxid...
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WO/2000/040529A1 |
The invention relates to the use of compounds of formula (I): wherein X is -C(O)-, -C(S)-, -C=NOH, or -CH(R?7¿)- wherein R?7¿ is hydrogen, hydroxy, C¿1-7?alkoxy, -OR?8¿ or -NR?8¿R?9¿ (wherein R?8¿ is a group -Y?1¿R?10¿ (wherein ...
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WO/2000/039069A1 |
The improved method of the present invention comprises reaction of an aromatic hydroxy compound, carbon monoxide, and oxygen in the presence of a catalyst system comprising a palladium compound, an inorganic co-catalyst, and a halide sou...
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WO/2000/037420A1 |
A method for efficient removal of lead co-catalyst species from organic process streams arising from diaryl carbonate synthesis, by contacting the organic reaction mixtures with an aqueous acid, salt, or acid/salt solution, thereby extra...
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WO/2000/037417A1 |
A continuous flow process for converting hydroxyaromatic compounds to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst system typically comprising a group VIIIB metal or compound thereof, an ino...
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WO/2000/037413A1 |
The invention relates to a method for producing an aromatic carbonate by oxidative carbonylation of an aromatic hydroxy compound with carbon monoxide and oxygen in the presence of a platinum metal catalyst, a co-catalyst, a base and opti...
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WO/2000/037414A1 |
A method for efficiently recovering a hydroxyaromatic compound from aqueous extract streams of diaryl carbonate reaction mixtures, comprises contacting the aqueous extracts with a suitable solvent, preferably diphenyl carbonate or anisol...
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WO/2000/037416A1 |
A method for efficient reclamation of metal catalyst species from aqueous extract streams of diaryl carbonate synthesis, comprising treating a metal-containing aqueous extract stream of a mixture from the production of diaryl carbonates ...
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WO/2000/037419A1 |
The invention relates to a method for reprocessing reaction mixtures containing diaryl carbonate, an aromatic hydroxy compound, water, a base, a quaternary salt and optionally, other catalyst components, said reaction mixtures being obta...
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WO/2000/037418A1 |
The invention relates to a method for reprocessing reaction mixtures containing diaryl carbonate, an aromatic hydroxy compound, water, a base, a quaternary salt and optionally, other catalyst components, said reaction mixtures being obta...
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WO/2000/037415A1 |
The method of the present invention comprises reaction of a gaseous mixture of oxygen and carbon monoxide with an aromatic hydroxy compound in the presence of a catalyst under controlled pressure, wherein the partial pressure of oxygen i...
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WO/2000/027794A1 |
Liquid composition which can be polymerized into organic glasses, by means of radical polymerization with low shrinkage, comprising the product obtained from the trans-esterification of a diallycarbonate (A) with a mixture of one or more...
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WO/2000/018719A1 |
An improved continuous process for removal of water from a process for producing organic carbonates, particularly diphenyl carbonate, by treating the water containing products of the reaction with a condensable stripping agent in a gaseo...
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WO/2000/018720A1 |
Production of diaryl carbonate esters by reaction of a dialkyl carbonate and an aromatic alcohol to form a diaryl carbonate and an alkyl alcohol is accomplished by introducing three reactant streams into an extractive/reactive distillati...
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WO/2000/012212A1 |
A process for producing dialkyl carbonates, such as dimethyl carbonate, from the reaction of a primary alcohol with urea in the presence of a novel catalyst which is a complex of organotin with a high boiling electron donor compound acti...
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WO/2000/009470A1 |
Carbonate ester is produced by acid hydrolysis of the reaction product of cupric alkoxide induced reaction between a hydroxy compound and a sulfur compound in a melt process. Diaryl carbonate is produced by hydrolysis of the resulting or...
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WO/2000/009466A1 |
Addition of phosphine ligands can produce high yields of tetraphenoxymethane, TPM, and diphenylcarbonate, DPC, in short reaction times and improved reaction rates by a copper-induced condensation of phenol and carbon disulfide, CS¿2?. E...
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WO/2000/005228A1 |
A process for decolorizing organic carbonates, for example, cyclic alkylene carbonates. The process involves contacting a discolored organic carbonate with hydrogen peroxide. A decolorized organic carbonate composition is also disclosed.
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WO/1999/064382A1 |
A process comprising feeding continuously a cyclic carbonate and an aliphatic monohydric alcohol to a continuous multi-stage distillation column and forming (A) a dialkyl carbonate and (B) a diol, wherein a gaseous low boiling point mixt...
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WO/1999/052853A1 |
Dibenzyl carbonates are produced by reacting a dialkyl carbonate with a benzyl alcohol in the presence of a basic catalyst and by separating slightly volatile constituents of the reaction mixture and the catalyst. The inventive method en...
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WO/1999/038837A1 |
The invention concerns a method consisting in making a mixed (meth)acrylic anhydride of formula (I) by reacting an alkaline (meth)acrylate of formula (II) and a chloroformate of formula (III), carrying out said reaction in an aqueous med...
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WO/1999/018625A2 |
The invention relates to the application of at least one ester of general formula (I) to (V), whereby R?1¿, R?2¿, R?3¿, R?4¿ are the same or different and each, independent of one another, represent a linear or branched-chain C¿1? t...
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WO/1999/014183A1 |
A process for the preparation of aromatic carbonates by transesterification of a starting substance selected from the group consisting of dialkyl carbonates, alkyl aryl carbonates and mixtures of both with a reactant selected from the gr...
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WO/1999/011597A1 |
The invention concerns a method for phosgenation of monohydroxy alcohol's and/or polyols characterised in that it consists of treating alcohol and or polyol, whether in the presence of solvent or not, with a molar excess of phosgene, pre...
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WO/1999/008787A1 |
The invention relates to mixed oxide catalysts containing a metal from the platinum group, preferably (Si/Mn/Pd), which were produced in a sol-gel process. The invention also relates to their use in a method for producing diarylcarbonate...
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WO/1999/008786A1 |
The invention relates to supported catalysts containing a metal from the platinum group. The catalyst supports contain mixed oxides of metals, transition metals and semiconducting elements which can act as redox catalysts in reaction con...
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WO/1999/006142A1 |
Aromatic carbonates can be prepared economically and efficiently by reacting an aromatic hydroxyl compound with carbon monoxide and oxygen in the presence of a catalyst which comprises a perovskitic composite oxide represented by the fol...
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WO/1998/054240A1 |
A process for the preparation of an aromatic polycarbonate by transesterification of a diaryl carbonate with an aromatic dihydroxy compound, characterized in that the diaryl carbonate is one which is prepared by decarbonylation of a diar...
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WO/1998/047870A1 |
This invention is concerned with a new and improved process for the large scale production of 4-[6-(hexylcarbamoyloxy)hexylcarbamoyloxy]-piperidine-1-carb
oxylic acid 4-phenoxyphenyl ester, disclosed in European Patent Application 0 635 ...
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WO/1998/030533A1 |
Novel catalysts for the synthesis of a alpha-chlorinated chloroformate from an aldehyde and phosgene are described. The catalysts include alkyl substituted guanidines, hexasubstituted guanidinium chlorides, substituted biguanidinium chlo...
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WO/1997/047583A1 |
The claim is for a process for producing higher dialkyl carbonates of the formula (I) (R1O)(R2O)CO, in which R1 and R2 are a linear or branched, saturated, unsaturated and/or alkoxylated alkyl radical, by the transesterification of lower...
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WO/1997/047586A1 |
An aromatic carbonic ester is prepared continuously and efficiently by reacting an aromatic carboxylic ester with an aliphatic carbonic ester and/or an aromatic/aliphatic carbonic ester through transesterification. A raw material compris...
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WO/1997/044108A1 |
A reaction distillation apparatus which can be applied to a relatively complicated reaction comprising the combination of two or more stages of equilibrium reactions, and a reaction distillation method which can efficiently conduct this ...
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WO/1997/023445A1 |
A process for continuously preparing dialkyl carbonates and diols, comprising the steps of: feeding a cyclic carbonate and an aliphatic monohydric alcohol into a continuous multistage distillation column; conducting transesterification i...
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WO/1997/011049A1 |
A process for the preparation of an aromatic carbonate by subjecting a starting compound selected from the group consisting of dialkyl carbonates, alkyl aryl carbonates and mixtures thereof and a reactant selected from the group consisti...
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WO/1997/003104A1 |
Disclosed are liquid to highly viscous oligocarbonates and polycarbonates containing as polyol components polyols having more than 20 C atoms, in particular so-called dimer diols or their commercially available technical mixtures. Also d...
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WO/1996/014289A1 |
Fluorobutenyl esters have the formula (I), in which R1 stands for hydrogen or a halogen, and R2 stands for one of the groups (a), (b) or (c), in which V, Y, Z, R3 and R5 have the meanings given in the description. Also disclosed are a pr...
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WO/1996/003366A1 |
The present invention relates to novel substituted bicyclic 2-mesityl cyclopentane-1,3-dione derivatives of the formula (I) in which A and Q together are alkane diyl or alkene diyl which may be substituted by alkyl, alkoxy, alkylthio, cy...
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WO/1995/025083A1 |
A process of preparing diaryl carbonates, such as diphenyl carbonate, and aryl haloformates, such as phenyl chloroformate. The process involves contacting phenol or a substituted phenol with a carbonyl halide, such as phosgene, in the pr...
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