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Matches 351 - 400 out of 1,570

Document Document Title
WO/1997/047586
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...  
WO/1997/047583
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...  
WO/1997/044108
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 ...  
WO/1997/023445
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...  
WO/1997/011049
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...  
WO/1997/003104
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...  
WO/1996/014289
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...  
WO/1996/003366
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...  
WO/1995/025083
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...  
WO/1995/017369
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...  
WO/1995/017371
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...  
WO/1995/011226
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...  
WO/1995/004796
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...  
WO/1994/022805
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...  
WO/1994/011335
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...  
WO/1994/008952
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...  
WO/1994/006749
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...  
WO/1993/014059
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...  
WO/1993/007116
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...  
WO/1993/003000
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...  
WO/1992/019664
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...  
WO/1992/018458
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...  
WO/1992/010464
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.  
WO/1992/010462
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...  
WO/1992/009555
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...  
WO/1992/007816
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 ...  
WO/1992/006066
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...  
WO/1991/010639
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...  
WO/1991/009832
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...  
WO/1991/006526
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...  
WO/1990/015791
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...  
WO/1990/011995
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.  
WO/1989/007587
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...  
WO/1988/006150
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...  
WO/1988/005430
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...  
WO/1988/001996
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...  
WO/1987/007601
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...  
WO/1986/003192
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...  
WO/1984/003701
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...  
WO/1984/002339
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...  
JP2013203702
To provide a method of producing a chain carbonate capable of obtaining a highly pure chain carbonate in high yield.A method of producing a chain carbonate includes a process of distilling a crude chain carbonate at ≤100°C to collect ...  
JP2013181028
To provide a method that is safer and or more convenient in a chemical reaction that uses a halogen and carbonyl halide as a chemical reaction raw material.A halogen and/or carbonyl halide derived from a mixture obtained by irradiating a...  
JP2013082695
To produce an unsymmetrical tetraarylphosphonium halide in good yield and at a high selectivity rate while suppressing generation of byproducts, when producing the unsymmetrical tetraarylphosphonium halide by reacting triarylphosphine an...  
JP2013063965
To provide an effective process for production of a dialkyl oxalate or/and a dialkyl carbonate, and an apparatus for production thereof.The process for production of the dialkyl oxalate or/and the dialkyl carbonate includes a first step ...  
JP2013010841
To provide a compound having a high refractive index, exhibiting no absorption of the ultraviolet range and no fluorescence, excellent in transparency, giving no adverse effect on the environment on disposal, and polymerizable by an indu...  
JP2012236806
To provide a method for efficiently producing a carbonic ester compound in the presence of a catalyst from an aliphatic alcohol compound, carbon monoxide and oxygen.This method for producing the carbonic ester compound by reacting an ali...  
JP2012214723
To provide a polycarbonate diol useful as a raw material of polyurethane and a thermoplastic elastomer or the like, and excellent in thermal stability and hydrolysis resistance.The novel poly (branched-chain alkylene) carbonate diol uses...  
JP2012162523
To provide a method for producing a carbonic acid ester, which enables a high reaction speed and a high reaction rate by reacting a monohydric alcohol with carbon dioxide in the presence of a solid catalyst, even under a mild reaction co...  
JP2012153603
To provide a method for efficiently producing diphenyl carbonate with high yield and high selectivity by the reaction of carbon monoxide with a phenoxy compound under mild conditions without requiring a high temperature condition or with...  
JP2012153909
To produce carbonic acid diester with a sufficient yield and selectivity by an electrolytic reaction which has not been produced with a sufficient yield and selectivity in a conventional electrolytic reaction.In the method for producing ...  

Matches 351 - 400 out of 1,570