Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 501 - 550 out of 2,808

Document Document Title
WO/1998/002400A1
A monomer composition, stabilised against premature polymerisation, comprising: a) an ethylenically unsaturated monomer or mixture of monomers polymerisable by free radical initiation, and b) an effective amount, sufficient to inhibit pr...  
WO/1998/002403A1
A method is provided for inhibiting the polymerization of vinyl aromatic monomers in ethyl benzene dehydrogenation effluent condenser systems and in styrene-water separator vent gas compressor systems. The method comprises adding a combi...  
WO/1998/000376A1
The present invention provides several methods of synthesis and separation in which organic/fluorous phase separation techniques are used to effect separations. The present invention also provides novel compositions of matter comprising ...  
WO/1997/046528A1
A process for reducing the dimerisation of piperidine of formula (I) in which R1 to R4 are C1 to C6 alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain with 2 to 5 C atoms. Said process is characterised in that to the piperidine i...  
WO/1997/046504A1
The invention concerns substance mixtures containing: (A) monomers containing vinyl groups; and (B) an active amount of a mixture which inhibits premature polymerization of the monomers containing vinyl groups during their purification o...  
WO/1997/042230A1
Novel polymer-supported quenching reagents of Formula (I): P-L-Q, wherein P is a polymer of low chemical reactivity which is soluble or insoluble; Q is one or more quenching reagents, or an acid or base addition salts thereof, that are c...  
WO/1997/040081A1
The invention consists of a process for separating organic monomers or auxiliaries, which are used in synthesising organic polymers or take part in the polymerisation reaction, from the prepolymer resulting from the synthesis, in which t...  
WO/1997/035821A1
Compositions and methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. The compositions comprise a hydroxylamine compound, a phenylenediamine compound and a vinyl aromatic m...  
WO/1997/034713A1
In order to treat organic chlorine compounds, which are generally hard to decompose, by a method, which poses no problem in terms of processes and is excellent in safety and economy, excess alkali is used to make the treating complete wh...  
WO/1997/033952A1
A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising: (a) a benzofuroxan derivative of formula (I) wherein R is C1-C4 alkyl or alkoxy; R1 is a nitro group...  
WO/1997/032833A1
The invention concerns a monomer composition comprising: A) monomers which contain vinyl groups and in which a heteroatom selected from the group comprising halogens, nitrogen, oxygen, sulphur or silicon is present on the vinyl group; an...  
WO/1997/027165A1
A process for removing bisfluoromethyl ether contained in fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether simply, easily and efficiently, which comprises bringing fluoromethyl 1,1,1,3,3,3-hexafluoromethyl ether containing bisfluoromet...  
WO/1997/026970A1
The invention concerns a method of vaporizing a fluid containing vaporizable oxidation-sensitive compounds in a vaporizer in which, for vaporization purposes, the fluid is brought into contact with a heated solid surface, direct contact ...  
WO/1997/024413A1
The invention involves a method for treatment of a charge comprising at least hydrocarbons containing at least three carbon atoms per molecule, including acetylenic and diolefinic hydrocarbons. The method entails the passage of the charg...  
WO/1997/024303A1
A method for efficiently purifying a particular substance contained in a raw material mixture, comprising the steps of: (1) subjecting the raw material mixture in a liquid form or a slurry form wherein part of the particular substance ha...  
WO/1997/024302A1
A method for purifying a particular substance contained in a mixture, comprising the following steps (1) and (2a) or (2b) and permitting a particular substance having high purity to be relatively simply recovered in a high yield from a m...  
WO/1997/013569A1
Described are preferred processes separating desired chemical products from other compounds in solution utilizing thermally-managed chromatography over solid adsorbents. The preferred processes involve chromatographic principles which ar...  
WO/1997/012851A1
A method for inhibiting the polymerization of vinyl compounds by using N-nitrosophenylhydroxylamine or salts thereof, wherein further use is made of either a copper salt or a combination of a metal dialkyldithiocarbamate with at least on...  
WO/1997/001520A1
A stabilized composition comprising an organic compound labeled with a 'beta'-emitting radionuclide and a stabilizing effective amount of a non-radiolabeled stabilizing compound selected from the group consisting of (i) heteroaryls havin...  
WO/1997/000714A1
A method for the extraction purification of at least one substance to be isolated from a liquid medium, comprising the steps of adding to the liquid medium a vapour-entrainable organic compound having a Lewis-type acid-base molecule wher...  
WO/1996/030374A1
The invention provides methanol, ethanol, and 1-propanol solvates of olanzapine and a process for using such solvates.  
WO/1996/030375A1
The invention provides Form II, a pharmaceutically elegant, stable polymorph of olanzapine.  
WO/1996/029311A1
The invention concerns 4-acylamino piperidin-N-oxyls of the formula: A1B1 wherein A1 stands for hydrogen or an organic group and B1 stands for a group of formula (IIa) in which the substituents have the following meanings: R1-R4 are C1-C...  
WO/1996/022325A1
The invention concerns a stabiliser mixture containing: (a) one or more chromane derivatives of general formula (I), in which R1 is a group of formula (i) as shown in which Z represents C7-C30 alkyl, -CH2CH2-S-(C1-C30-alkyl) or a group o...  
WO/1996/020923A1
Cleaning raw caprolactam by hydration, subsequent treatment in an acid medium and final distillation in an alkaline medium, in which (a) 6-amino capronitrile is converted into raw caprolactam by reaction with water; (b) difficultly and e...  
WO/1996/018445A1
According to the process, a solid or liquid phase containing the compounds to be separated is contacted with a supercritical fluid in the extractor (1), and the supercritical fluid charged with compounds and coming out of the extractor (...  
WO/1996/016921A1
Nitroxyl inhibitors in combination with some oxygen reduce the premature polymerization of vinyl aromatic monomers during the manufacturing processes for such monomers. Even small quantities of air used in combination with the nitroxyl i...  
WO/1996/015102A2
Described are 2-cyanoacrylic acid esters (I) in which the groups are defined as follows: R1 and R2 are hydrogen or a group with an isocyclic or heterocyclic ring system having at least one iso-aromatic or hetero-aromatic nucleus, whereby...  
WO/1996/014278A1
Metal oxidizing agents (such as silver oxide or silver nitrate) are added to a solution of organic chemicals which comprise an unwanted level of organic reducing agents (either aqueous or organic solutions in which the metal oxidizing ag...  
WO/1996/007631A1
A method of inhibiting vinyl compound polymerization by using a metal dithiocarbamate, wherein water is added to the reaction system in a quantity of 0.05 - 5 wt.% based on the vinyl compound or a compound selected from among alcohols, i...  
WO/1996/006138A1
The invention concerns a method of extracting carotinoid dyes from pre-dried natural basic materials by means of compressed gases, such as propane and/or butane. In order to facilitate and complete the extraction process, organic entrain...  
WO/1996/001247A1
Recovery of carboxylic acid from an amine-based, water-immiscible organic extractant solution thereof that contains an extraction enhancer, by extraction of acid into an aqueous phase. In a preliminary step the enhancer is removed from t...  
WO/1995/027707A1
A process for separating non-oxidizable compounds from a mixture containing at least one oxidizable compound. The mixture is contacted with ozone to oxidize oxidizable compounds to form oxidized compounds which are then converted to wate...  
WO/1995/021010A1
The objet of the invention is an optimised process for regenerating a steam-heating stream charged with water-vapour-volatile organic components by condensing the vapour phase with the recovery of the heat of condensation and the at leas...  
WO/1995/020590A1
The subject invention provides chiral receptor molecules useful for the purification of enantiomers of amino acid derivatives and other compounds. The subject invention also provides methods of preparing said receptor molecules.  
WO/1995/019339A1
Agents for solubilising biomolecules, particularly proteins, are disclosed. The agents consist of zwitterions having formula (I) or (II), wherein X is N or P; B is a hydrocarbon chain having 1-6 carbon atoms; R<1>, R<2> and R<3> are hydr...  
WO/1995/017937A1
The invention concerns the working up of reaction mixtures containing undesirable high-boiling by products, low-boiling educts and the product sought, the boiling point of the product sought lying between the boiling points of the high- ...  
WO/1995/017433A1
The use of mono-3,6-anhydro-cyclodextrins for solubilising a hydrophobic compound and monitoring the purity of an enantiomer is disclosed. Said mono-3,6-anhydro-cyclodextrin has formula (I), wherein n is 5, 6 or 7, preferably 6. The hydr...  
WO/1995/015308A1
The present invention relates to a crystalline, 'alpha'-polymorphic form of a compound of formula (I) and to processes for the preparation of, to intermediates used in the preparation of, to compositions containing and to uses of, the 'a...  
WO/1995/014520A1
The invention relates to a process for the simplified separation of an organically-based complex mixture containing solid and/or liquid components (the raw material) by the treatment of the said mixture with a gaseous entrainer which is ...  
WO/1995/012445A1
The invention pertains to a process and device for separating a mixture having at least two components, wherein a separation phase is impacted by the mixture to be separated and then the separation phase loaded with the mixture is eluted...  
WO/1995/011216A1
This invention relates to a novel urea fractionation process for purification of e.g. fatty acids and derivatives thereof. The process is characterised in that the urea complexation takes place under heterogenous conditions using a solve...  
WO/1995/009907A1
Disclosed is a method of separating a compound from a solution comprising passing the solution through at least one crystal of a biological macromolecule capable of selectively binding the compound.  
WO/1995/009243A1
The method for producing crystalline 'alpha','alpha'-trehalose by isolation from baker's yeast consists in the extraction of baker's yeast with ethanol of concentration 70 to 96 volume %, vacuum concentration of the obtained extract to t...  
WO/1995/005387A1
This invention pertains to a gamma crystalline modification of 2,2',2"-nitrilo[triethyl-tris-(3,3',5,5'-tetra-tert-butyl-1, 1'-biphenyl-2,2'-diyl)phosphite], to a process for preparing said modification and the use thereof for stabilizin...  
WO/1995/005361A1
The proposed method of obtaining a physically stable crystalline gamma-modification of para-aminobenzene sulphanilamide involves cooling a solution of para-aminobenzene sulphanilamide in water, an organic solvent, or a mixture of the two...  
WO/1995/003263A1
A method for inhibiting the polymerization of vinyl aromatics such as styrene with a mixture of 3,5-di-tert-butyl-4-hydroxy-N,N-dimethylbenzyl amine and carboxylic acids or anhydrides thereof, in the presence of air or oxygen. The weight...  
WO/1995/003268A1
An organic acid can be recovered from a fermentation broth by clarifying the broth to remove at least a substantial portion of the impurities therein, producing a clarified feed; acidulating the clarified feed by adding a quantity of a m...  
WO/1995/000207A1
A method of decomposing halogenated aromatic compounds safely without fail, which comprises bringing a solution of a halogenated aromatic compound in a hot-alkali-resistant polar solvent into contact with an alkaline substance at about 1...  
WO/1994/024141A1
Sugar surfactants with an improved scent can be produced by treating mixtures containing (a) alkyl and/or alkenyl oligoglycosides of formula R1O-[G]p where R1 is an alkyl or alkenyl group with 4 to 22 carbon atoms, G a sugar residue with...  

Matches 501 - 550 out of 2,808