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WO/2000/058255A1 |
The present invention relates to a method for separating a liquid crude aldehyde mixture by distillation. Said mixture contains unbranched and branched aldehydes. In a first distillation column, the product mixture is separated into a fi...
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WO/2000/056692A1 |
A method wherein a sour natural gas stream can be treated to produce primarily carbon monoxide from methane, and the carbon monoxide and hydrogensulfide are reacted to produce methyl mercaptans, (primarily methanethiol (CH¿3?SH) and a s...
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WO/2000/056451A1 |
The invention relates to a catalyst comprising at least one metal complex of the VIII subgroup, which includes at least one monodentate, bidentate or polydentate phosphine amidite ligand of general formula I.1, I.2 and/or I.3, wherein A?...
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WO/2000/055164A1 |
The invention relates to phosphabenzene compounds of general formula (I), wherein the radicals R?1¿ to R?13¿, independently of each other, are hydrogen, COOM, SO¿3?M, NR¿3?X, NR¿2?, OR, COOR or SR (with M = hydrogen, NH¿4? or alkal...
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WO/2000/054880A1 |
The invention relates to the utilization of silica-based MCM-41 type microporous solid catalysts additionally containing Ti in their composition for obtaining $g(a)-pinene oxidation products by using organic hyperoxides as oxidizing agents.
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WO/2000/053556A1 |
The invention relates to a method for the catalytic gas phase oxidation of propene into acrolein in which the initial mixture of reaction gas, with a propene charge of > 160 Nl/l.h, is fed over a fixed-bed catalyst that is accommodated i...
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WO/2000/053562A1 |
The present invention relates to novel retinoid antagonists of the formula (I) wherein the dotted bond is optional; and, when the dotted bond is present, R?1¿ is lower alkyl and R?2¿ is hydrogen; and, when the dotted bond is absent, R?...
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WO/2000/053557A1 |
The invention relates to a method for the catalytic gas phase oxidation of propene into acrylic acid in which the initial mixture of reaction gas, with an increased propene charge, is oxidized on a first fixed-bed catalyst during a first...
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WO/2000/053555A1 |
The invention relates to a method for carrying out the heterogeneously catalyzed gas phase oxidation of propane into acrolein and/or acrylic acid in which the initial mixture of reaction gas is fed over a fixed-bed catalyst which is comp...
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WO/2000/053157A1 |
The invention describes the use of a little percentage of lubricant (0.05-0.5 % by weight) in powdery pharmaceutical compositions for use in dry powder inhalers in order to increase the fine particle dose. A process for coating the surfa...
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WO/2000/053554A1 |
A process for producing an aldehyde which comprises reacting a 1,2-diol (vic-diol) with oxygen in the presence of a ruthenium catalyst carried on a support to thereby oxidatively cleave the bond between two carbon atoms each having a hyd...
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WO/2000/051953A1 |
The invention relates to the catalytic gas phase oxidation of carbon hydrates with improved selectivity. The invention relates especially to the oxidation of toluenes to form benzaldehydes. The aim of the invention is to increase selecti...
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WO/2000/050373A1 |
The invention relates to a method for the hydroformylation of olefins with at least 7 carbon atoms. According to said method a) the olefin is subjected to a hydroformylation reaction together with carbon monoxide and hydrogen in the pres...
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WO/2000/039055A1 |
Novel polyaromatic hydrocarbon quenching reagents of Formula (I), wherein: P is a polyaromatic hydrocarbon of low chemical reactivity which is soluble; Q is one or more quenching reagents, or an acid or base addition salts thereof, that ...
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WO/2000/034202A1 |
Disclosed is sintered ceramic article that exhibits a primary crystalline phase of cordierite and analytical oxide composition, in weight percent, of 49-53 % SiO¿2?, 33-38 % Al¿2?O¿3?, 12-16 % MgO and exhibits a coefficient of thermal...
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WO/2000/034220A2 |
A method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization, whereby a nitroxyl radical and a chemical compound containing phosphorous in a che...
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WO/2000/033952A1 |
The invention relates to a method for producing formaldehyde from air, methanol and possibly water in a formaldehyde reactor with silver catalyst (2). By means of a special reaction gas cooling structure (3) the reaction gas is cooled in...
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WO/2000/031011A1 |
Production of unsaturated aldehydes by the aldol condensation of straight chain aldehydes, e.g. butyraldehyde, by contacting the aldehyde in the vapour phase with a particulate catalyst comprising at least one basic alkali metal compound...
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WO/2000/031010A2 |
The invention relates to methods for producing chiral aldehydes by the enantioselective hydroformylation of prochiral substrates using a catalyst comprised of a transition metal and of a chiral ligand. The invention is characterized in t...
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WO/2000/029106A1 |
A mixed metal oxide Mo-V-Ga-Pd-Nb-X (where X=La, Te, Ge, Zn, Si, In or W) catalytic system providing a higher selectivity to acrylic acid in the low temperature partial oxidation of propane with a molecular oxygen-containing gas.
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WO/2000/029105A1 |
A mixed metal oxide Mo-V-Ga-Pd-Nb-X (where X=La, Te, Ge, Zn, Si, In or W) catalytic system providing oxidation of C¿2?-C¿8? hydrocarbons to corresponding acids with a molecular oxygen-containing gas.
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WO/2000/027810A1 |
The present invention provides valuable intermediates which can be used in the synthesis of a compound having polyene chain structure, processes for preparing the same, and a process for preparing $g(b)-carotene by using said intermediat...
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WO/2000/027784A1 |
The invention relates to carbonyl compounds of the general structure (I) where the rest R?1¿ is hydrogen or an alkyl group with between 1 and 5 carbon atoms, the rests R?2¿ and R?3¿ independently of each other are hydrogen or an alkyl...
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WO/2000/025914A1 |
A solid, particulate catalyst composition comprising an active nickel component in which the nickel constitutes from 25 to 60 wt% of the catalyst composition; a molybdenum component in which the molybdenum constitutes from 5 to 20 wt% of...
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WO2000010952B1 |
A decahydronaphthalene derivative represented by general formula (I), a liquid-crystal composition containing the derivative; and a liquid-crystal element containing the composition. The decahydronaphthalene derivative, which is a novel ...
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WO/2000/024411A2 |
Provided are biologically active extracts from $i(Aframomum aulocacarpus, Aframomun danellii, Dracaena arborea, Eupatorium odoratum, Glossocalyx brevipes) and $i(Napoleonaea imperialis) which are suitable for use in treating fungal and p...
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WO/2000/024699A1 |
Aqueous formaldehyde solutions with a pH value of 3.4-4.2, containing a) 10-75 wt.% formaldehyde and b) 0-5000 wt.ppm tetroxane.
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WO/2000/024697A1 |
Aldehyde derivatives of polyethylene glycols and methods of making thereof are disclosed. These aldehyde derivatives can be used to make polyethylene glycol-hydrazines, polyethylene glycol-thiols, polyethylene glycol amines, and branched...
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WO/2000/023187A1 |
Disclosed are catalyst systems comprising one or more transition metals selected from the Group VIII metals and rhenium and one or more chlorophosphite compounds having general Formula (I), wherein R?1¿ and R?2¿ are aromatic hydrocarby...
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WO/2000/021914A1 |
Cobalt or rhodium carbonyl compounds are removed from an aqueous solution of 3-hydroxypropanal by a process comprising the steps of: (a) contacting the 3-hydroxypropanal solution with oxygen under acidic conditions at a temperature withi...
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WO/2000/017188A1 |
The invention relates to a method for separating trioxan from a liquid mixture containing trioxan, formaldehyde, alcohol, hemiformals formed from the formaldehyde and the alcohol, the usual minor constituents from the production of triox...
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WO/2000/015341A2 |
The invention relates to an evolutionary method for producing catalysts. In a first step (i), components are selected and added to a library of substances. Mixtures of these individual materials are then produced randomly by random selec...
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WO/2000/015592A1 |
3,3-Dimethylbutyraldehyde is synthesized via hydrolysis of 1,1-dichloro-3,3-dimethylbutane or 1-bromo-1-chloro-3,3-dimethylbutane in the presence of water and a base and is purified via an aldehyde/bisulfite adduct.
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WO/2000/015593A2 |
Alkyl aromatic compounds are converted to alkyl aromatic aldehydes by a carbonylation reaction. The carbonylation catalyst can be a high boiling point carbonylation catalyst which allows for the separation of the aldehyde product by sele...
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WO/2000/015594A1 |
A process for the carbonylation of alkyl aromatic compounds uses acidic ionic liquids. In one embodiment, the ionic liquid is intrinsically acidic, having an anion mole fraction of greater than 0.5. The ionic liquids include those compri...
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WO/2000/013794A1 |
The invention relates to a supported catalyst containing at least one water-soluble transition metal complex. The supported catalyst is characterized in that polymeric particles having a hydrophobic core and hydrophilic side-chains are u...
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WO/2000/012471A1 |
The invention relates to a method for producing formaldehyde by non-oxidative dehydrogenation of methanol in a reactor while using a fluid catalyst. After the reactor, the product gases are brought into contact with a melt in a cooler. S...
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WO/2000/010960A1 |
A method for producing acrolein and/or acrylic acid from propane, whereby the propane undergoes partial homogeneous and/or heterogeneous catalysed oxydehydrogenation with molecular oxygen in a first reaction step to form propane. The pro...
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WO/2000/010957A1 |
A method for producing acrolein and/or acrylic acid from propane, whereby the propane undergoes homogenous and/or heterogeneous catalysed oxide hydrogenation in a first reaction step with molecular oxygen to form propane and the product-...
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WO/2000/010955A1 |
The invention concerns the use of a solid composition of mixed oxides of formula (I): Mo¿12?Bi¿a?Fe¿b?Co¿c?Ni¿d?Si¿e?K¿f?Cr¿g?O¿x? 0.5 $m(F) a $m(F)5; 0.1 $m(F) b $m(F) 10; 0.5 $m(F) c $m(F) 10; 0 $m(F) d$m(F)10; 0 $m(F) e $m(F)...
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WO/2000/010961A1 |
A method for producing acrolein and/or acrylic acid from propane, whereby the propane undergoes partial homogeneous and/or heterogeneous catalysed oxydehydrogenation in a first reaction step with molecular oxygen to form propane. The pro...
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WO/2000/009467A1 |
The invention relates to a method for producing aldehydes and/or alcohols or amines by reacting olefins in a liquid phase with carbon monoxide and hydrogen. One portion of these gases is dispersed in the reaction fluid in the form of gas...
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WO/2000/009260A1 |
A mixed metal oxide catalytic system consisting of molybdenum, vanadium, palladium, lanthanum, niobium and X, wherein X is copper and/or chromium, providing higher yields of acrylic acid and acrolein in the low temperature oxidation of p...
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WO/2000/009253A1 |
The invention relates to a reactor (1) with a contact tube bundle (2). A heat-exchange medium circulates in the space surrounding the tubes. The reactor comprises circular pipes (3, 4) at both reactor ends, which have openings (5, 6) in ...
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WO/2000/007966A1 |
The invention relates to new traceless linkers which use transition metal complexes to link a $g(p)-orbital containing substrate for subsequent synthesis by, for example, combinatorial chemistry or multiple parallel synthesis (MPS) to a ...
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WO/2000/006527A1 |
The 3- and 4-methylcatechols are converted to the corresponding benzaldehyde by first alkylating the hydroxyl groups to form an alkylated methylcatechol. The methyl group is then converted to a methyl dibromide group using 1,3-dibromo-5,...
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WO/2000/002854A1 |
The invention concerns a novel method for preparing vitamin A from ethynyl-retro-$g(a)-ionol using an allene acetate as intermediate.
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WO/2000/001485A2 |
This invention relates to a method of stabilizing a metal-organophosphorus ligand complex catalyst against deactivation in a process which comprises reacting one or more reactants in the presence of a metal-organophosphorus ligand comple...
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WO/2000/001651A1 |
In a process for the hydroformylation of alkanes, alkenes or trialkylboranes under supercritical or near-critical conditions, hydroformylation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercrit...
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WO/1999/067192A2 |
This invention is directed to a process for the solid phase synthesis of aldehyde, ketone, oxime, amine, hydroxamic acid and $g(a),$g(b)-unsaturated carboxylic acid and aldehyde compounds and to polymeric hydroxylamine resin compounds us...
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