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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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WO/1995/017369A1 |
A process for making a dialkyl carbonate which comprises reacting urea with a first alcohol in a carbamate reactor at a temperature and pressure sufficient to convert said urea to an alkyl carbamate; and reacting the alkyl carbamate with...
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WO/1995/017371A1 |
A catalyst for aryl ester production, which contains a microporous material containing a Group IV metal element, is insoluble in reaction fluids and hence can be used as a heterogenous catalyst. Thus it can permit an aryl ester to be pro...
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WO/1995/011226A1 |
A substituted benzene derivative of formula (I), wherein A is an aryloxy group which may be substituted, an arylthio group which may be substituted or -ON=C(R1)R2, each of R1 and R2 which are independent of each other is an alkyl group w...
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WO/1995/004796A1 |
A process for depolymerizing polymers by selective, partial oxidation at supercritical or near supercritical conditions for water and wherein supercritical water or water near supercritical conditions is used as a solvent and reforming a...
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WO/1994/022805A1 |
The proposal is for a process for producing dialkyl carbonate from CO2 in which the reaction with the alkoxy group of an alkoxy compound is performed at high temperature and pressure in the presence or absence of a catalyst. Preference i...
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WO/1994/011335A1 |
A process for producing a carbonic diester by the catalytic reaction of carbon monoxide with a nitrous ester in the presence of a solid catalyst, characterized by adding a minute amount of a chloroformic ester to the feedstock gas compri...
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WO/1994/008952A1 |
The present invention provides a process for preparing urethanes and carbonates from an amine or an alcohol, carbon dioxide and a hydrocarbyl halide. The amine or alcohol is reacted with carbon dioxide in a suitable solvent system and in...
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WO/1994/006749A1 |
Di(organo) esters of pyrocarbonic acid, e.g., dialkyl pyrocarbonates, such as diethyl pyrocarbonate, are prepared by reaction of the corresponding organohaloformate with aqueous alkali metal hydroxide, e.g., sodium hydroxide, in the subs...
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WO/1993/014059A1 |
An integrated process for the production of dimethyl carbonate is disclosed. The process utilizes oxygen and an inexpensive carbon source such as natural gas as reactants. Other reactants are generated within the process and used without...
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WO/1993/007116A1 |
Fungicidal compounds having formula (I), wherein W is CH3O.CH=CCO2CH3, CH3ON=CCONR3R4 or CH3ON=CCO2CH3 and stereoisomers thereof; n is 0 or 1; X is oxygen or sulphur; Z is oxygen, sulphur or NR1; R1 is hydrogen or alkyl optionally substi...
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WO/1993/003000A1 |
Improved yields of aromatic organic carbonates made by the palladium catalyzed direct carbonylation of aromatic organic hydroxy compounds can be achieved if the total gas pressure and partial pressure of carbon monoxide and oxygen are su...
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WO/1992/019664A1 |
Water-soluble, biologically decomposable carbonic acid polyesters have general formula (I), in which R�1? represents a straight- or branched-chain, saturated or monosaturated alkyl residue having 6 to 22 C atoms; R�2? represents hydr...
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WO/1992/018458A1 |
A diaryl carbonate is produced by transesterification of a dialkyl carbonate, such as dimethyl carbonate, with an aromatic hydroxy compound, such as phenol, in three successive reaction zones. A transesterification catalyst, such as a ti...
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WO/1992/010464A1 |
4,5-Dihydroxy- and 4,5,8-trihydroxy- 9,10-dihydro-9,10-dioxo-2-anthracenecarboxylic acid dicarbonates and urethans having therapeutical activities, a process for the preparation thereof and pharmaceutical compositions containing them.
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WO/1992/010462A1 |
Guerbet carbonates are disclosed having the formula (I), in which R?1¿ stands for a branched alkyl residue with 12 to 44 carbon atoms and R?2¿ stands for R?1¿ or for a linear alkyl residue with 1 to 12 carbon atoms. To produce these c...
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WO/1992/009555A1 |
A process for the preparation of an aromatic carbonate from a phenol, acetic anhydride, carbon monoxide and oxygen comprising the steps of A) reacting acetic anhydride with phenol to form phenyl acetate; B) reacting the phenyl acetate wi...
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WO/1992/007816A1 |
The present invention provides a process for the preparation of alkoxycarbonyloxystyrene comprising reacting acyloxystyrene with a strong base to yield a phenolate to which is added an alkoxycarbonylating agent in an organic solvent and ...
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WO/1992/006066A1 |
A process for producing diester of carbonic acid safely in a stabilized manner with high selectivity and yield, which comprises conducting the vapor-phase catalytic reaction of carbon monoxide with nitrous ester in the presence of a soli...
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WO/1991/010639A1 |
The present invention relates to hitherto unknown intermediate of formula (I), in which R1 stands for hydrogen or a straight or branched aliphatic C1-C20 carbon chain or an aryl or aralkyl group, aryl and "ar" meaning an aromatic or hete...
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WO/1991/009832A1 |
A process for continuously producing an aromatic carbonate or its mixture corresponding to the starting material comprising dialkyl carbonate, alkyl aryl carbonate or a mixture thereof and the reactant comprising aromatic hydroxy compoun...
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WO/1991/006526A1 |
A process and a heterogeneous catalyst for the production of diaryl carbonates from the reaction of an aromatic hydroxy compound and a carbonyl halide and elimination of anhydrous hydrogen halide. The catalyst comprises a salt containing...
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WO/1990/015791A1 |
Carbonic esters are important as an extender for gasoline, an octane number improver and an organic solvent, and further as a substitute for phosgene used in the production of isocyanates, polycarbonates and intermediates of various agri...
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WO/1990/011995A1 |
Novel oxo-ionol derivatives are described which have a but-1-en-3-ol carbonate side chain. These derivatives are stable tobacco enhancers which impart a slight hay-like flavor to tobacco smoke.
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WO/1989/007587A1 |
A carbonic acid ester is produced by reacting an alcohol with both carbon monoxide and oxygen in the presence of a catalyst comprising a divalent copper atom in the form of a weak acid salt and/or halide and an alkaline earth metal in th...
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WO/1988/006150A1 |
A prepolymer stabilization process for polyalkylene carbonate polyols includes the steps of adding a small quantity of an organosulfonic acid with stirring until base neutralization is achieved. One measure of base neutralization is a ne...
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WO/1988/005430A1 |
A process for preparing diisocyanate compounds by the following two-step reaction without using phosgene. In the first step, a diamine and dimethyl carbonate are reacted with each other in the presence of an alkali catalyst to synthesize...
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WO/1988/001996A1 |
A method is provided for making reaction products of phosgene and dihydric phenol under interfacial reaction conditions. The dihydric phenol such as BPA is introduced into the reactor in the form of a stable suspension which reduces phos...
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WO/1987/007601A1 |
A process for the preparation of dihydrocarbyl carbonates comprising contacting an alkanol, carbon monoxide and oxygen with a heterogeneous catalyst which comprises a metal halide or mixed metal halide impregnated on an appropriate suppo...
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WO/1986/003192A1 |
Chloroformate compositions, particularly bischloroformate compositions, are prepared by the reaction of phosgene with a hydroxy compound, preferably a dihydroxy compound such as bisphenol A, in a heterogeneous mixture, while adding a hyd...
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WO/1984/003701A1 |
Alkylene carbonates and optionally dialkyl carbonates are prepared by reaction of an alkylene oxide with carbon dioxide in the presence of an alcohol. In addition there is added to the reaction mixture a trivalent phosphorus containing c...
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WO/1984/002339A1 |
Dihydrocarbyl carbonates are produced by reacting in the liquid phase under substantially anhydrous conditions a dihydrocarbyl peroxide, a primary or secondary alcohol and carbon monoxide in the presence as catalyst of copper in elementa...
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JP2024517149A |
The present invention relates to a centrifugal droplet separator for separating droplets from a gas stream, the centrifugal droplet separator comprising a shell (1) having a circular cross section and a vertical longitudinal axis (11); a...
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JP7470045B2 |
A carbon dioxide reduction apparatus comprises a first electrochemical compartment provided with a first electrode, a second electrochemical compartment provided with a second electrode, an ion conducting membrane which demarcates the fi...
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JP2024047270A |
The present invention provides a method for producing a carboxylic acid ester compound having one or more carboxy groups, which has improved productivity. [Solution] (1) A step of performing an esterification reaction by mixing a compoun...
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JP7455303B2 |
To provide a production method that makes it possible to obtain organic carbonate at high yield without using phosgene, and a catalyst for the production of organic carbonate that is used in the production method.A catalyst for the produ...
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JP7451771B2 |
The method for industrially producing a dialkyl carbonate and a diol, in which the dialkyl carbonate and the diol are continuously produced through a reactive distillation system of taking a cyclic carbonate and an aliphatic monohydric a...
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JP7442276B2 |
To provide a method for producing a polyfunctional polycarbonate polyol.A polycarbonate glycol represented by general formula (1) (where R1 is a C2-10 alkanediyl group and n is a number of 1 or greater) is reacted with a hydroxy compound...
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JP2024506402A |
The present invention provides a method for producing an asymmetric linear carbonate, which includes a step of producing an asymmetric linear carbonate by transesterifying two different types of symmetric linear carbonates under a metal ...
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JP2024505183A |
The present invention discloses a continuous process for the synthesis of dimethyl carbonate from methanol and carbon dioxide over a ceria-based mixed metal oxide-silica catalyst formulation in the presence of a dehydrating compound or a...
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JP7425448B2 |
The purpose of the present invention is to provide a method for safely and efficiently producing a halogenoformic acid halogenated alkyl ester that also serves as a synthesis intermediate of a carbamate or an isocyanate compound. This me...
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JP7421772B2 |
The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently even without using a base. The method for producing a carbonate derivative according to the present invention is character...
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JP2023552107A |
The present invention includes the step of transesterifying an aliphatic alcohol and a symmetrical linear carbonate in the presence of a catalyst, wherein the catalyst is an acidic ion exchange resin, and the mass of the aliphatic alcoho...
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JP2023552108A |
The present invention includes transesterifying an aliphatic alcohol and a symmetrical linear carbonate in the presence of a catalyst, the catalyst having an exchange capacity of 1 (eq/L-wet resin) or more, 1.5 (eq/L-wet resin) or more, ...
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JP2023552121A |
The present invention includes a step of transesterifying dimethyl carbonate (DMC) and ethanol (Ethanol, EtOH) in the presence of a catalyst, The catalyst relates to a method for producing a different type of linear carbonate, which is a...
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JP2023552122A |
The present invention comprises a step of transesterifying dimethyl carbonate (DMC) and ethanol (Ethanol, EtOH) in the presence of a catalyst; The present invention relates to a method for producing a different type of linear carbonate, ...
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JP2023552120A |
The present invention includes a step of transesterifying dimethyl carbonate (DMC) and ethanol (Ethanol, EtOH) in the presence of a catalyst, The catalyst is a group consisting of Lithium Methoxide (LME), Lithium Ethoxide (LEE), Sodium M...
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JP7393592B1 |
The fluorene is produced by a depolymerization method in which a fluorene-containing resin having a fluorene skeleton and an ester bond and/or a carbonate ester bond is reacted with a carbonate ester in the presence of a hydrolysis catal...
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JP7389414B2 |
Provided are an arylpropionic acid derivative represented by Formula (I), a pharmaceutical composition and a preparation method and an application thereof. The arylpropionic acid derivative has a good half-life, pharmacokinetic property ...
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JP2023549890A |
The present invention provides a method for producing an asymmetric linear carbonate, which includes the step of producing an asymmetric linear carbonate by transesterifying two different types of symmetric linear carbonates under a base...
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