| Patents for C07B 63 - Purification; Separation specially adapted for the purpose of recovering organic compounds; Stabilisation; Use of additives (4,057) |
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| 07/04/1990 | EP0376089A1 Process for the dry neutralization of organic liquid phases |
| 07/03/1990 | CA2006880A1 Push column and chromatography method |
| 06/27/1990 | EP0374615A2 Process for the separation of organometallic compounds and/or metal carbonyls from their solution in organic media |
| 06/13/1990 | EP0372900A2 Process for drying hydrogen fluoride - carboxylic acid mixtures |
| 06/13/1990 | EP0372683A2 Dehydration of organic oxygenates |
| 06/06/1990 | EP0371748A2 Inhibition of polymerization during distillation of monomers |
| 06/06/1990 | CA2003924A1 Process for drying hydrogen fluoride-carboxylic acid mixtures |
| 06/05/1990 | US4931184 Chromatographic separation |
| 05/29/1990 | US4929774 Stable mixture containing oxidation-sensitive compounds, preparation thereof and use of a combination of substances for stabilizing oxidation-sensitive compounds |
| 05/29/1990 | US4929357 Isocyanurate crosslinked polyurethane membranes and their use for the separation of aromatics from non-aromatics |
| 05/29/1990 | CA2002893A1 Inhibition of polymerization during distillation of monomers |
| 05/16/1990 | EP0368138A1 Adsorbent for chromatography |
| 05/09/1990 | EP0367580A2 Purification of phosphorus compounds |
| 05/08/1990 | CA1268761A1 Method of carrying out chemical dehydration reaction and an apparatus therefor |
| 05/02/1990 | CA2001975A1 Purification of phosphorus compounds |
| 04/25/1990 | EP0365495A2 9-Anthrylalkyl compounds, their preparation and their use |
| 04/18/1990 | EP0363428A1 Conversion of pyrethroid isomers to more active species. |
| 04/17/1990 | US4918220 Separation of toluene diisocyanate from the residues of the production thereof |
| 04/11/1990 | EP0215010B1 Insecticidal composition comprising more than one active ingredients |
| 04/10/1990 | US4916239 Process for the lactonization of mevinic acids and analogs thereof |
| 03/27/1990 | US4912211 Method for producing pure crystalline antibiotic products |
| 03/20/1990 | US4910295 Reducing odor; crystalline siliceous molecular sieve |
| 03/14/1990 | CN1040364A Process for preparing di ( alkylsulfomethyl ) phenole |
| 02/27/1990 | US4904574 Including metal complex |
| 02/14/1990 | CN1039580A Method for recovering crystals from crystal-containing slurry |
| 02/14/1990 | CN1006765B Method of carrying out chemical dehydration reaction and apparatus therefor |
| 02/07/1990 | CN1039420A Process for the lactonization of xevinic acids and analogs thereof |
| 02/06/1990 | US4898938 Method for preparing crystalline cefadroxil monohydrate |
| 01/30/1990 | US4897198 Separation agent comprising 1,3-glucan |
| 01/24/1990 | EP0351918A1 Process for the lactonization of mevinic acids and analogs thereof |
| 01/16/1990 | US4894482 Process for drying hydrogen fluoride-carboxylic acid mixtures |
| 01/09/1990 | US4892659 Separation agent comprising aliphatic ester of polysaccharide |
| 01/03/1990 | EP0349297A1 Purification of spergualin-related compounds |
| 01/03/1990 | EP0348976A2 Liquid composition having low-temperature stability |
| 12/20/1989 | EP0346739A2 Method for separating a liquid component from a solution containing two or more liquid components |
| 12/05/1989 | US4885418 Treating with a water-containing anion exchanger in the oh form |
| 11/30/1989 | WO1989011323A1 Process for recovering crystals from slurry |
| 11/07/1989 | US4879038 Separation agent comprising acyl- or carbamoyl-substituted polysaccharide |
| 11/02/1989 | WO1989010343A1 Process for inhibiting the polymerization of acid monomers |
| 10/17/1989 | US4874473 Separation of diastereomers by extractive distillation |
| 10/17/1989 | CA1262365A1 Extraction of aromatics with n-cyclohexyl-2- pyrrolidone |
| 10/11/1989 | CN1036220A Stable mixture containing oxidation-sensitive compounds, its prepn. and application |
| 09/19/1989 | US4868347 Process for obtaining substituted fluorobenzenes |
| 09/13/1989 | EP0331846A2 Separation of organic liquids |
| 09/12/1989 | CA1259196A1 Method for eluting a metal adsorbed on an chelating agent |
| 08/29/1989 | US4861628 Thin film composite membrane prepared by suspension deposition |
| 08/16/1989 | EP0208758B1 Pyrethroidal composition comprising more than one active ingredients |
| 08/15/1989 | US4857572 Elastomers and tackifier resins |
| 08/08/1989 | US4855053 Extraction of organic compounds from aqueous solutions |
| 08/02/1989 | EP0326026A2 Stable mixture containing oxidation-sensitive compounds, process to obtain it and use of a combination of products to stabilize oxidation-sensitive compounds |
| 07/19/1989 | EP0324701A1 Process for the separation of toluene diisocyanate from its production residues |
| 07/11/1989 | US4846968 Cellulose triacetate and carrier; chromatographic elution |
| 07/05/1989 | EP0322661A2 Process for the recuperation of rhodium from aqueous solutions containing complex rhodium compounds |
| 07/04/1989 | US4845279 Nitration, hydrolysis |
| 07/04/1989 | US4845126 Insecticidal composition comprising more than one active ingredient |
| 07/04/1989 | US4844809 Method for purifying reaction solution obtained by using microbial cell, immobilized microbial cell, or immobilized enzyme |
| 06/28/1989 | EP0322155A1 Synthesis of high purity dimethylaluminum hydride |
| 06/27/1989 | US4843184 Process for extracting paraffins from their mixtures with paraffinsulfonic acids |
| 05/24/1989 | EP0317281A2 Pharmaceutical formulations containing melphalan or melphalan hydrochloride, as well as melphalan and melphalan hydrochloride and processes for preparing them |
| 05/16/1989 | US4830921 Packing material for liquid chromatography |
| 05/16/1989 | US4830752 Separation agent comprising 1,3-glucan |
| 05/10/1989 | EP0315188A2 Methods and materials for the preparation of metal labelled antibody solutions |
| 05/09/1989 | US4828702 Countercurrent extraction, solvent in liquid or supercritical state |
| 05/02/1989 | US4827078 Process for extracting paraffins from their mixtures with alkanesulfonic acids |
| 04/19/1989 | EP0312377A2 Method of preparing thin film composite membranes by suspension deposition, and use of such membranes |
| 04/19/1989 | EP0312376A2 Polyurea membrane and its use for aromatics/non-aromatics separations |
| 04/12/1989 | EP0310827A1 Process for the removal of metal halides from liquid, organic compounds not miscible with water |
| 04/04/1989 | US4818409 Obtaining aqueous solutions of organic acids or bases from aqueous solutions of their salts |
| 04/04/1989 | US4818394 Separating agent |
| 03/28/1989 | CA1251620A1 Process and device for the extraction of form-labile, flowable masses |
| 03/22/1989 | EP0307864A1 Process for the recovery of hydrogen/heavy hydrocarbons from hydrogen-lean feed gases |
| 03/22/1989 | EP0307636A1 Method for effecting dehydration of glycols using a membrane |
| 03/21/1989 | US4814497 Dehalogenation process |
| 03/14/1989 | US4812233 Cylindrical counter-current extraction pressure-resistant chamber with solvent nozzle in bottom |
| 03/07/1989 | US4810798 Solvent extraction, distillation |
| 02/21/1989 | US4806641 Salts of 3-hydroxy-4-oxo-3,4-dihydro-1,2,3-benzotriazine and amino compounds |
| 02/15/1989 | CN1031085A Method for preparing crystalline cefadroxil monoltydrate |
| 02/08/1989 | EP0302145A2 Method for preparing crystalline cefadroxil monohydrate |
| 02/07/1989 | US4802988 Dehydration of glycols |
| 02/01/1989 | EP0301879A2 Inhibition of polymerization during distillation of monomers |
| 01/26/1989 | DE3723874A1 Process for isolating organic substances which are soluble in aqueous-alkaline media |
| 01/25/1989 | EP0300071A1 Process for the separation and purification of organic substances from impurities |
| 01/18/1989 | EP0299793A2 Packing materials for analysing enantiomer mixtures by liquid chromatography |
| 01/17/1989 | US4798915 Process for the extraction of paraffins from mixtures thereof with alkane-sulfonic acids |
| 01/17/1989 | US4798674 Alcohol, oxygenate, membranes, concentration |
| 01/10/1989 | US4797500 Removal of silicon compounds with sodium or potassium |
| 01/10/1989 | CA1248325A1 Purification apparatus and method employing a regenerable ligand |
| 01/04/1989 | EP0297445A2 Method for the production of methacrylic acid |
| 01/03/1989 | US4795571 Purification of frozen crystal layers |
| 12/29/1988 | WO1988010249A1 Conversion of pyrethroid isomers to more active species |
| 12/28/1988 | CN88103528A Conversion of pyrethroid isomers to more active species |
| 12/14/1988 | EP0295000A1 Inhibition of polymerization fouling during distillation of monomers in the presence of sulfur oxides |
| 12/07/1988 | EP0293744A1 Process for recovering benzolmonosulfonic acids from aqueous solutions or suspensions |
| 11/29/1988 | US4788011 Spraying from separate nozzles; mixing in the spray cones |
| 11/22/1988 | US4786481 Method for eluting a metal adsorbed on a chelating agent |
| 11/22/1988 | US4786416 Cellulose triacetate |
| 11/22/1988 | US4786415 Separation agent comprising aliphatic ester of polysaccharide |
| 11/01/1988 | US4781858 Cyclodextrin-silica composite and a method for the preparation thereof |
| 10/24/1988 | EP0227797A4 Reduction of organohalogen compounds in metal and metalloid chloride production streams. |
| 10/18/1988 | US4778882 Method of carrying out chemical dehydration reaction and an apparatus therefor |