Patents
Patents for C07B 63 - Purification; Separation specially adapted for the purpose of recovering organic compounds; Stabilisation; Use of additives (4,057)
06/2004
06/03/2004US20040104170 Use of membranes to separate organic liquids having different polarities
06/03/2004US20040104146 C-nitrosoaniline compounds and their blends as polymerization inhibitors
06/02/2004EP1424013A1 A method of extracting and isolating minor components from vegetable oil
06/02/2004CN1500778A Preparing method for motherwort general alkaloid
05/2004
05/26/2004EP1218320B1 Treatment of mixtures that contain at least one compound with at least one ethylenically unsaturated group
05/26/2004CN1498887A Process for purifying N-carboxy acid anhydride
05/26/2004CN1151113C hydroxyal condensation process
05/20/2004US20040094749 Having improved solubility and handling properties
05/19/2004EP1419141A1 Stabilisation of ethylenically-unsaturated compounds with amidoximes
05/19/2004EP1419126A1 Fluorous nucleophilic substitution of alcohols and reagents for use therein
05/19/2004EP1418877A2 Reagents that facilitate the purification of compounds synthesized on a solid support
05/19/2004DE4330591B4 Verfahren zur Stabilisierung von Sexualpheromonen A process for the stabilization of sex pheromones
05/19/2004CN1496760A Purification device and method
05/18/2004US6737254 Supercritical extraction of taxanes
05/13/2004US20040091407 Novel process for preparing crystalline particles of a salt of a substance, particularly particles of therapeutically useful or carrier substances of a size suitable for inhalation therapy.
05/13/2004US20040089613 Mixing with alkylating, arylating, acylating, or silylating agent; precipitation
05/13/2004US20040089586 C-nitrosoaniline compounds and their blends as polymerization inhibitors
05/13/2004DE10251140A1 Separation of acids from reaction mixtures by means of an auxiliary base that forms a liquid salt with the acid to result in two non-miscible phases with the product or solution of the product in a suitable solvent
05/11/2004US6734318 Fluorous triphase and ther multiphase systems for effecting reactions and/or separation
05/06/2004WO2002010100A3 Recycle of nitroxyl-containing streams at low temperature
05/06/2004EP1415991A1 Process for the purification of N-carboxyanhydrides
05/05/2004CN1493313A Extraction method of orostachys fimbriatus effective component
04/2004
04/29/2004DE10248902A1 Separation of acids from reaction mixtures by means of an auxiliary base that forms a liquid salt with the acid to result in two non-miscible phases with the product or solution of the product in a suitable solvent
04/28/2004EP1412062A2 Use of membranes to separate organic liquids having different polarities
04/27/2004US6726854 For stabilization of vinylically unsaturated compounds
04/22/2004DE10247417A1 Crosslinkable copolyimide consisting mainly of repeating units derived from dianhydrides useful as membranes for separating various materials at high feed pressures with high selectivity and high permeability
04/21/2004CN1490298A Separation preparing method for aloe-emodin and parietic acid
04/15/2004WO2004031105A2 Use of a33 antigens and jam-it
04/15/2004US20040073054 Using a fluorinated phenyl compound containing electrophilic and nucleophilic groups
04/15/2004US20040073035 Removal by salt formation
04/15/2004US20040069609 Purification apparatus and method
04/15/2004CA2498631A1 Use of a33 antigens and jam-it
04/14/2004CN1488609A Method for extracting effective extract from dry fruit
04/14/2004CN1488289A Process for separating zanthookylum bungeanum ingredient using supercritical fluid technology
04/13/2004US6720358 Water stripping and catalyst/liquid product separation system
04/08/2004WO2004029007A1 Use of 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxy as an agent for stopping polymerisation in the production of alkylimidazolidone (meth)acrylates
04/07/2004EP1405840A1 Solvents containing cycloalkyl alkyl ethers and process for production of the ethers
04/07/2004EP1405839A1 Process for separating zinc salts from zinc alcoholates or zinc amides containing non-aqueous synthesis solvents
04/07/2004EP1404687A2 Fluorous triphase and other multiphase systems
04/07/2004CN1144782C Process for separating vitamin D3
04/06/2004US6716273 Method and device for eliminating oxygen contained in aqueous monomer solutions
04/01/2004US20040063112 Using template to prepare imprinted frozen fluid usable as separation medium, recognition element in sensors and bioassays and as catalyst
03/2004
03/31/2004EP1402932A1 Purification apparatus and method
03/31/2004EP1114014B1 Fluoroalkene-nucleophile adducts for analysis and removal of fluoroalkenes
03/31/2004EP0835858B1 Process for the purification of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether
03/31/2004CN1485304A One-step production of high-purity trimellitic acid from pseudocumene
03/25/2004WO2004024656A2 Process for reducing chromium in nonvolatile residue resulting from air oxidation of cyclohexane
03/24/2004EP1399252A1 Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent
03/24/2004CN1142820C Reaction of mixture solution
03/18/2004US20040050780 Process for reducing chromium nonvolatile residue resulting from air oxidation of cyclohexane
03/18/2004US20040050681 Polymerization inhibition effected during distillation of (meth)acrylic acid/ester by using a column equipped with a heat exchanger; setting a linear gas velocity in the line connecting of 5 m/sec and retention time of <3 sec
03/18/2004DE10237274A1 Removal of zinc from organic solutions containing zinc alcohate/amide in the synthesis of pharmaceuticals, comprises addition of an alkylating, arylating, acylating or silylating agent in the presence of a nitrogen donor precipitating agent
03/16/2004US6706839 Chemical partitioning agents and methods of using same
03/16/2004US6706502 Enzymatic preparation of hydroxy fatty acid esters of polyhydric alcohols which are solid at room temperature
03/16/2004US6706209 Stabilized monomer composition
03/16/2004US6706208 A polymerization inhibitor for hydroxyalkyl (meth)acrylate consists of hydroxyalkyl saturated carboxylate and/or alkylene glycol along with phenol compound
03/11/2004US20040049071 Contacting non-fluorous phase with fluorous phase at first phase interface; fluorous-tagged compound distributes between the phases; and contacting fluorous phase with second non-fluorous phase at a second phase interface.
03/11/2004US20040045498 Screening for optimal yield in the crystallisation of multicomponent systems
03/10/2004EP1395613A2 Methods and compositions for inhibiting polymerization of vinyl monomers
03/10/2004EP1395545A1 Methods and compositions for inhibiting polymerization of vinyl monomers
03/10/2004EP1185489B1 Method for preventing undesired polymerisation in a mixture of substances containing ethylenically unsaturated compounds
03/03/2004CN1479704A Method for producing molecular compound
03/03/2004CN1140340C Catalyst and method for purifying mass flow
03/02/2004US6699370 Process and system for decomposing pollutants
02/2004
02/26/2004US20040035251 Chemical process
02/25/2004CN1476892A Method for separating effertive components of Chinese medicine by adopting membrane technique
02/24/2004USRE38435 Separating agent
02/19/2004US20040034247 Compositions and methods for inhibiting vinyl aromatic monomer polymerization
02/18/2004EP1389607A1 Method of inhibiting polymerization of aromatic vinyl
02/12/2004US20040030123 Method for producing molecular compound
02/11/2004EP1387820A2 Method for the production of a purified melt of at least one monomer
02/11/2004CN1473594A Extract of Maka root
02/11/2004CN1137745C Chromatography process
02/10/2004US6689400 Sovent extracting the dried marigold flower petals, eluting through an anion exchange resin column, diluting the eluent, crystallization; protecting lutein against deterioration, store for long time
02/05/2004US20040020757 Process for the mild distillative separation of mixtures
02/03/2004US6685896 Method for recovering rhodium from reaction products of oxosynthesis
02/03/2004US6685823 Inhibiting the premature polymerization of ethylenically unsaturated monomers by adding compounds selected from c-nitrosoaniline and quinone imine oxime compounds
02/03/2004US6684526 Process for removing trace solvent from a material
01/2004
01/28/2004CN1470487A Method for removing ginkgolic acid from ginkgo leaf extract by extraction method
01/27/2004US6683220 Chromatographic separation on solid stationary chiral phase of spherical clay particles having interlayer containing optically pure metal-organic complex and liquid mobile phase containing methyl acetate; producing sertraline
01/22/2004WO2004007407A2 Fluorous tagging and scavenging reactants and methods of synthesis and use thereof
01/22/2004US20040015033 Method for producing squalene
01/22/2004US20040014985 Method for separation of reaction products from catalysts
01/22/2004US20040011706 Distillation into a low-boiler, a medium-boiler and a high-boiler fraction in one or more dividing-wall columns, in which is arranged in longitudinal direction of column
01/22/2004US20040011638 Method for stabilizing acrylic monomers
01/22/2004DE10230222A1 Verfahren zur Abtrennung von Säuren aus chemischen Reaktionsgemischen mit Hilfe von Ionischen Flüssigkeiten A process for separating acids from reaction mixtures by means of ionic liquids
01/21/2004CN1469916A C-nitrosoaniline compounds and their blends as polymerization inhibitors
01/21/2004CN1469765A Method and device for carrying out the distillative separation of C5+ cuts
01/15/2004US20040010159 Blends of quinone alkide and nitroxyl compounds and polymerization inhibitors
01/14/2004CN1134429C Process for purifying thiophene
01/07/2004EP1377287A2 Proanthocyanidins for the treatment of amyloid and alpha-synuclein diseases
01/06/2004US6673879 Destroying peroxy compounds that might be present
01/02/2004EP1372807A2 Ionic liquids as selective additives for the separation of close-boiling or azeotropic mixtures
12/2003
12/31/2003WO2004000284A1 Pharmaceutical compositions with improved dissolution
12/31/2003CA2489984A1 Pharmaceutical compositions with improved dissolution
12/30/2003CA2327751C Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process
12/24/2003WO2003037835A3 Method for eliminating polarizable impurities from hydrocarbons with ionic liquids
12/24/2003CN1462733A Method for preparing compound phenolhydrocarbon sodium
12/18/2003US20030232978 Reagents that facilitate the purification of compounds synthesized on a solid support
12/16/2003US6664418 N-oxyl compounds dissolved in solution with (meth)acrylic acid or one of its esters to prevent polymerization during storage
1 ... 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 ... 41