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WO/1996/016734A1 |
A silver catalyst for ethylene oxidation to ethylene oxide is prepared by impregnating an inert support with a silver/amine solution and calcining the impregnated support at 300-500 �C, the catalyst being maintained under an inert atmo...
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WO/1996/016953A1 |
In an improved process for recovering ethylene oxide from an aqueous ethylene oxide solution further containing formaldehyde is provided wherein the impure aqueous ethylene oxide solution is introduced into a distillation zone as a feed ...
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WO/1996/013329A1 |
This invention relates to an ethylene oxide catalyst having improved initial selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium co-promoter sel...
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WO/1996/013493A1 |
This invention relates to a process for the preparation of an ethylene oxide catalyst having improved initial activity which process comprises depositing a promoting amount of alkaline earth metal, preferably barium and/or magnesium, on ...
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WO/1996/011919A1 |
A process is disclosed for preparing epoxide group-containing organic compounds. Monounsaturated or polyunsaturated organic compounds are oxidised with an aqueous hydrogen peroxide solution in the presence of carboxylic acids. The proces...
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WO/1996/009117A1 |
A silica-titania mixed oxide catalyst can be manufactured by producing a sol from optionally pre-hydrolyzed silicon alkoxide and from titanium alkoxide, the hydrolyzability of which is reduced by chelate formation, under acidic or basic ...
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WO/1996/008311A1 |
The present invention provides a novel synthesis for preparing D4-symmetric chiral porphyrins derived from 1R-(+)-nopinone. The simplicity and flexibility of this synthetic protocol provides an attractive route to this novel class of por...
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WO/1996/004989A1 |
An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of a neo acid; subjecting the impregnated support to a low temperature activation by heating at a...
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WO/1996/004074A1 |
An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of an acid; subjecting the impregnated support to a multi-stage activation in an atmosphere conta...
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WO/1996/002323A1 |
The invention concerns a titanium or vanadium silicalite-based oxidation catalyst having a zeolite structure and containing between 0.01 and 20 wt % of one or a plurality of platinum metals from the group comprising ruthenium, rhodium, p...
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WO/1996/002526A1 |
A process for producing cyclohexene oxide which comprises the first step of preparing a reaction fluid (1) containing cyclohexene chlorohydrin by reacting chlorine with a 0.1-1.0 N aqueous alkali solution or suspension to prepare chlorin...
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WO/1996/000709A1 |
This invention is a process for preparing chlorohydrins by reacting a chlorinating species, such as hypochlorous acid, with at least one unsaturated organic compound, such as propylene or butylene, at a pH of greater than 6.0. The chlori...
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WO/1996/000222A1 |
The invention concerns a method of producing 1,2-butylene oxide by the catalytic hydrogenation of vinyl oxirane, the method calling for the use of a palladium catalyst on a barium sulphate, zirconium oxide or titanium dioxide support or ...
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WO/1995/035290A1 |
Disclosed in a process for the homogeneous, catalytic hydrogenation of epoxyalkenes and epoxycycloalkenes, especially conjugated 'gamma','delta'-epoxyalkenes and 'gamma','delta'-epoxycycloalkenes, to the corresponding expoxyalkanes and e...
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WO/1995/031450A1 |
A process for synthesizing enantiomerically pure chiral secondary alcohol compounds linked to a heterocyclic core moiety, using a natural chiral molecule starting material. The inventive process is particularly useful for bulk manufactur...
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WO/1995/030650A1 |
The invention relates to borneol derivatives of the general formula (I) in which R1 is C(O)-CH(OR6)-CH(NHR7)-R8, R2 is hydrogen, -OH, C1-C10-Alkyl, C1-C10-alkoxy, -OC(O)R9b, -OP(O)(OH)2 or R2 and R3 are together an oxygen atom, R4 is hyd...
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WO/1995/028374A1 |
A novel glycerol derivative and a process for producing the same, and a process for producing a triazole derivative. Specifically the invention provides an optically active 2-arylglycerol derivative that is novel and useful as an interme...
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WO/1995/024267A1 |
A metallomacrocycle catalyst composition comprising a complex of: (i) a transition metal catalyst selected from: (a) a transition metal porphin and mixtures thereof; (b) a transition metal phthalocyanine and mixtures thereof; (c) mixture...
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WO/1995/024401A2 |
The invention relates to a process for preparing 1,2-butylene oxide by the catalytic hydrogenation of vinyl oxirane on a heterogeneous catalyst by using a catalyst which contains an element from the Ist, VIIth or VIIIth subgroup of the p...
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WO/1995/023794A2 |
Glycidyl esters are prepared to have low chlorine, chloride, sodium and potassium contamination and a thixotropic index greater than 3.0 by a process that comprises reacting carboxylic mono- or dimer acids with glycidyl alcohols in a mol...
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WO/1995/022396A1 |
Ethylene oxide is removed from exhaust gases of sterilisation plants and/or from outgoing air from storehouses for sterilised products. A catalyst-containing adsorbent (for example active coal or silica gel) binds the ethylene oxide, for...
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WO/1995/021172A1 |
A process for enantioselectively epoxidising a prochiral olefin, which process comprises reacting the prochiral olefin with a source of oxygen in the presence of a salen catalyst and a source of an electron donating ligand, characterised...
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WO/1995/017957A1 |
A catalyst comprising a porous refractory support having deposited thereon a catalytically effective amount of silver, a promoting amount of alkali metal, a promoting amount of rhenium, and a promoting amount of Group IVB metal applied t...
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WO/1995/014635A1 |
A process of preparing alkylene oxides comprises steps of: (1) optionally contacting metal hydroxide or oxide with chlorine to form a metal hypochlorite solution; (2) contacting chlorine with a solution of a metal hypochlorite at a tempe...
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WO/1995/013874A1 |
Disclosed are catalysts based on: a) a magnetizable core which, b) can as needed be coated with a binder, and c) carries on its surface catalytically active metals or metallic compounds.
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WO/1995/011230A1 |
A process for the preparation of an oxirane, aziridine or cyclopropane of formula (I) wherein, X is oxygen, NR4 or CHR5; R1 is hydrogen, alkyl, aryl, heteroaromatic, heterocyclic or cycloalkyl; R2 is hydrogen, alkyl, aryl, heteroaromatic...
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WO/1995/009850A1 |
Disclosed herein is an improved gas phase process for the selective epoxidation of non-allylic olefins wherein the epoxidation is carried out in the presence of certain inert, paraffin hydrocarbons. Such hydrocarbons possess higher heat ...
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WO/1995/008545A1 |
Manufacturing ethylene oxide comprises allowing to react in a reactor (2) ethylene and free oxygen-containing gas to ethylene oxide in the presence of methane, argon and carbon dioxide; withdrawing from the reactor (2) a reactor effluent...
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WO/1995/007754A1 |
This invention relates to an epoxidation catalyst having improved selectivity stability, comprising silver, a promoting amount of alkali metal, a promoting amount of rhenium, a promoting amount of nickel and, optionally, a promoting amou...
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WO/1995/007139A1 |
This invention relates to an ethylene oxide catalyst which contains silver and one or more alkali metal promoters supported on a carrier having a crush strength of at least 2.3 kg and a settled packing density of at least about 0.48 kg/l...
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WO/1995/005896A1 |
This invention relates to an ethylene oxide catalyst which contains, prior to the catalyst's first use in the conversion of ethylene to ethylene oxide, silver, one or more alkali metal promoters and 0.4 x 10-3 to 4.0 x 10-3 moles of chlo...
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WO/1995/005370A1 |
A process for the epoxidation of alkenes is provided. The process comprises contacting the alkene with a solution of partially neutralised Caro's acid in the presence of a ketone at a pH of from 7 to 8.5. Preferably, the ketone is select...
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WO/1995/003249A1 |
In the manufacture of a substituted Beta zeolite, a high ethene pressure, is used advantageously accompanied by synthesis gel ageing and low aluminium content.
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WO/1995/001837A1 |
This invention relates to an epoxidation catalyst having improved selectivity stability which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of magnesium, a promoting amount of rhenium and, optionally, ...
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WO/1994/029022A1 |
The invention relates to a material comprised of silicotitanates having a crystalline structure similar to MCM-41 zeolites, said material being characterized in that it contains in its lattice atoms of titanium and channels in its porous...
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WO/1994/023834A1 |
The solid catalyst based on amorphous particulate silica comprising titanium (IV), and showing in ultraviolet reflection spectography an absorption band at about 240 nm, is characterized in that the titanium is present in the catalyst in...
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WO/1994/022847A1 |
Disclosed is a process for the preparation of 3,4-dichloro- and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butene with chlorine or bromine in the presence of a catalytic amount of a tertiary amine or a hydrohalide of a pr...
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WO/1994/019338A1 |
A process for the preparation of (1S,2R)-1,2-epoxy-1,2,3,4-tetrahydronaphthalene having formula (I), which comprises the steps of (a) hydrogenating the compound of formula (II) to form c_i_s_-(1R,2S)-1,2-dihydroxy-1,2,3,4-tetrahydronapht...
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WO/1994/017049A1 |
A process for producing highly pure cis-epoxysuccinic acid salt in a high yield while suppressing the amount of DL-tartaric acid salt as a by-product by epoxidizing maleic acid salt with hydrogen peroxide in the presence of an epoxidatio...
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WO/1994/014764A1 |
The present invention comprises a process for the asymmetric synthesis of florfenicol, thiamphenicol or chloramphenicol. In an alternative embodiment, the present invention comprises a process for isomerizing of the S,S-isomer of florfen...
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WO/1994/013653A1 |
The invention concerns a method of preparing 3,4-epoxy-1-butene by the gas-phase epoxidation of 1,3-butadiene by oxygen or oxygen -containing gases over silver-containing catalysts, and the isol ation of the 3,4-epoxy-1-butene from the r...
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WO/1994/012277A1 |
The invention concerns new oxidation catalysts, methods of producing them and their use. These catalysts consist of titanium silicalites crystallized in situ on to activated charcoal or metal oxides. The titanium silicalite content lies ...
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WO/1994/010106A2 |
The present invention provides an acid catalyst complex comprising an organosulfonic acid having at least one covalent carbon-fluorine bond or one covalent carbon-phosphorus bond provided by a phosphono radical which has been contacted w...
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WO/1994/007855A1 |
Organic peracids supported on inorganic macromolecular supports and a process for preparing them are provided. The peracids have general chemical formulae: (I) where Q represents the inorganic support, A is an alkylene or arylene group, ...
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WO/1994/008028A1 |
The invention relates to a method for enzymatically preparing aromas, particularly C6 to C10 aldehydes, by contacting at least one source of lipoxygenase and hydroperoxyde-lyase with a source of unsaturated fatty acids, the reaction taki...
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WO/1994/006736A1 |
A sensitized photooxygenation process of unsaturated compounds uses fullerenes as sensitizers.
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WO/1994/004268A1 |
The invention relates to a catalyst for the epoxidation of alkenes using alkylhydroperoxide, the catalyst comprising an ion of one or more of the metals molybdenum, wolfram, titanium or vanadium on an inorganic carrier, characterised in ...
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WO/1994/003271A1 |
A compound of formula (I), in which M is a transition metal ion; A is a counter-ion if required; r, s and t are independently 0 to 3 such that r+s+t is in the range of 1 to 3; Ra, Rb, Rc are each independently hydrogen or CH2OR\' where R...
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WO/1994/002245A1 |
New titanium zeolite Beta catalysts which have been found to be useful as catalysts for the oxidation of organic compounds using organic hydroperoxides as oxidation catalysts. They are particularly useful as ring opening oxidation cataly...
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WO/1993/023368A1 |
Compounds represented by formula (I) or a pharmaceutically acceptable salt, prodrug or ester thereof, wherein A represents radicals represented by formulae (A1, A2, A3) (values for the variables given herein), are effective as retroviral...
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