| Patents for C07C 273 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups (3,705) |
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| 08/10/2000 | DE19915313A1 Addition of urea compounds to product liquids, e.g. to control the flow properties of resin binders for paint, involves reacting amine with isocyanate directly in the shear field of an in-line dissolver |
| 08/01/2000 | US6096923 Process for the preparation of nitrosourea compounds |
| 07/27/2000 | WO2000043358A1 Process for the preparation of urea |
| 07/25/2000 | US6093850 Process for the synthesis of urea and equipment therefor |
| 07/25/2000 | US6093820 Reacting an imide with a (substituted)alkoxyalkylsulfonic acid ester to form a n-alkoxyalkyl imide such as methoxymethyl ethosuximide; administering as anticonvulsant, antianxiety agent and muscle relaxant |
| 07/20/2000 | WO2000042009A1 Stable activated novel carbamic acid derivatives, preparation method and use for preparing urea |
| 07/19/2000 | EP1020512A2 Urea-surfactant clathrates |
| 07/18/2000 | US6090970 Production method of alkylated cyanoacetylurea |
| 07/13/2000 | WO2000040529A1 Colchinol derivatives as vascular damaging agents |
| 07/13/2000 | CA2355302A1 Colchinol derivatives as vascular damaging agents |
| 07/05/2000 | CN1054122C Process and equipment for producing urea in reaction spaces with different yield |
| 07/04/2000 | US6084129 Reacting carbon dioxide gas with free ammonia contained in molten urea product flow |
| 06/29/2000 | WO2000037570A1 Process for synthesis of allophanate compounds and compositions including the product thereof |
| 06/29/2000 | WO2000012472A3 Process for preparing certain phenyl urea compounds |
| 06/29/2000 | CA2355935A1 Process for synthesis of allophanate compounds and compositions including the product thereof |
| 06/28/2000 | CN1053890C Process for reducing ammonia content of gaseous effluent from urea production plant |
| 06/22/2000 | WO2000035864A1 New biphenyl and biphenyl-analogous compounds as integrin antagonists |
| 06/22/2000 | CA2355161A1 Biphenyl and biphenyl-analogous compounds as integrin antagonists |
| 06/20/2000 | US6077972 Ceramide compound, process of preparation and use |
| 06/08/2000 | WO2000032566A1 Method of introducing melamine off-gases into a urea plant |
| 06/08/2000 | CA2350792A1 Method of introducing melamine off-gases into a urea plant |
| 05/31/2000 | EP1004575A1 Process for the preparation of O-alkylisourea |
| 05/31/2000 | CN2380568Y Urea recovering-washing tower |
| 05/31/2000 | CN1052975C Process for improving existing device for preparing area |
| 05/25/2000 | DE19853984A1 Verfahren zur Herstellung von O-Alkylisoharnstoff A process for preparing O-alkylisourea |
| 05/23/2000 | US6066759 Process and device for preparing (cyclo)aliphatic biuret groups-containing polyisocyanates |
| 05/17/2000 | EP0973719A4 Method of preparing amino carboxylic acids |
| 05/10/2000 | CN1052221C Improvements of processes and plants for the production of urea |
| 05/09/2000 | US6060616 Antitumors agents; leukemia, ovarian carcinoma |
| 05/09/2000 | US6060586 Ureins derived from alpha, omega-diamono acids and process for their preparation |
| 05/09/2000 | US6059995 Process and preparation of hydrogen-rich gas |
| 05/04/2000 | WO2000024707A1 Substituted phenyl derivatives, their preparation and use |
| 05/04/2000 | CA2342626A1 Substituted phenyl derivatives, their preparation and use |
| 04/19/2000 | EP0730570B1 Method for making intermediates useful in synthesis of retroviral protease inhibitors |
| 04/19/2000 | CN1251088A Process for preparing urea |
| 04/05/2000 | EP0850217B1 Process for the preparation of arylalkynyl-n-hydroxyurea derivatives having lipoxygenase inhibitory activity |
| 04/05/2000 | EP0840722B1 Process and device for preparing (cyclo)aliphatic biuret groups-containing polyisocyanates |
| 04/05/2000 | CN1051076C Method for producing urea, urea reactor and related apparatus |
| 04/05/2000 | CN1051075C Process and apparatus for producing urea with increased yield by stripping with CO2 |
| 04/04/2000 | CA1340948C Peptidylaminodiols |
| 04/04/2000 | CA1340940C Peptidylaminodiols |
| 03/28/2000 | CA1340936C Method for purifying linuron |
| 03/09/2000 | WO2000012472A2 Process for preparing certain phenyl urea compounds |
| 03/09/2000 | WO2000012468A1 An improved synthesis of 3-hydroxy-4-amino-benzonitrile |
| 03/09/2000 | CA2341718A1 An improved synthesis of 3-hydroxy-4-amino-benzonitrile |
| 03/09/2000 | CA2341697A1 Process for preparing certain phenyl urea compounds |
| 03/01/2000 | CN1049887C Method for synthesizing biuret by liquid phase process |
| 02/22/2000 | CA1340904C Amino acid derivative anticonvulsant |
| 02/22/2000 | CA1340902C Amino acid derivative anticonvulsant |
| 02/09/2000 | EP0977731A1 Process for preparing urea |
| 02/08/2000 | US6022882 2-chloro-3, 5-bis(trifluoromethyl)phenyl benzoyl urea derivative and process for preparing the same |
| 02/02/2000 | EP0976724A1 Improved process for the synthesis of urea and equipment therefor |
| 02/02/2000 | CN2361631Y Urea synthetic tower |
| 02/02/2000 | CN1048979C Vacuum separator of urea plant |
| 01/26/2000 | EP0974579A1 Novel nitroisourea derivatives |
| 01/26/2000 | EP0973719A1 Method of preparing amino carboxylic acids |
| 01/26/2000 | CN1242763A Improved process for synthesis of urea and equipment therefor |
| 01/25/2000 | US6018069 (2s,3s,5s)-2,5-diamine-1,6-diphenyl-3-hydroxyhexane compounds are purified by obtaining the acid addition salt from a mixture with its (2s,3s,5r) stereoisomer; useful as intermediates to hiv protease inhibitor synthesis |
| 01/18/2000 | US6015921 Reacting carboxymethylurea derivative with aniline derivative |
| 01/06/2000 | WO2000000466A1 Process for the preparation of urea |
| 01/06/2000 | CA2336042A1 Process for the preparation of urea |
| 01/05/2000 | EP0800512B1 Antiherpes peptidomimetic compounds |
| 01/05/2000 | CN2357007Y Drum cooling device for urea |
| 01/04/2000 | US6010669 For high pressure equipment; cleaning area, forming supports,inserting liners, fusion |
| 12/29/1999 | WO1999067228A1 Fluorophenyl resin compounds |
| 12/29/1999 | WO1999067206A1 Novel compounds useful in pain management |
| 12/29/1999 | WO1999067204A1 Novel compounds |
| 12/29/1999 | CA2335760A1 Fluorophenyl resin compounds |
| 12/29/1999 | CA2335581A1 Novel compounds useful in pain management |
| 12/29/1999 | CA2335528A1 Novel compounds |
| 12/22/1999 | EP0965581A1 Production method of alkylated cyanoacetylurea |
| 12/22/1999 | CN1239473A Method of preparing amino carboxylic acids |
| 12/01/1999 | CN1236776A Vacuumizing process for preparing urea by full aqueous solution cycle method |
| 11/30/1999 | US5994558 2-isoxazoline derivative and process for producing the same; and process for producing related derivatives from the same |
| 11/30/1999 | US5994491 Continuously combining organic diisocyanates having aromatically attached isocyanate groups in a mixing chamber with aromatic diamines wherein the residence time is at most 60 seconds. |
| 11/24/1999 | EP0873182B1 Hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous solution |
| 11/16/1999 | US5985968 Surface tension reduction with N,N-dialkyl ureas |
| 11/10/1999 | EP0888176B1 Safety process for pressure equipment in contact with corrosive fluids |
| 11/03/1999 | CN1234022A Process for prepn. of urea |
| 11/02/1999 | US5977399 Iminooxymethyleneanilides, preparation thereof and intermediates therefor, and compositions containing them |
| 10/28/1999 | WO1999029663A9 Process for the preparation of urea |
| 10/13/1999 | CN1231657A Process for the urea synthesis from ammonia and carbon dioxide and apparatus thereof |
| 10/12/1999 | US5965071 Process for preparing granular urea |
| 10/12/1999 | US5964901 Method for detecting clogging and granulation method |
| 10/07/1999 | WO1999050235A1 Apparatus and process for the preparation of urea from carbon dioxide and ammonia |
| 10/05/1999 | US5962692 Chemical intermediates for viricides |
| 09/22/1999 | EP0781164B1 Method for in-situ modernization of a urea synthesis reactor |
| 09/16/1999 | WO1999046037A1 Apparatus for effecting gas/liquid contact |
| 09/15/1999 | CN1228416A Process and plant for production of urea with high conversion yield and low energy consumption |
| 09/08/1999 | EP0790981B1 Aryloxycycloalkenyl and aryloxyiminocycloalkenylhydroxyureas as 5-lipoxygenase inhibitors |
| 09/08/1999 | CN1227820A Process for preparation of hydrogen-rich gas |
| 09/01/1999 | CN1044904C Method of retrofitting a pre-existing plant for urea production including an ammonia stripping section |
| 08/11/1999 | EP0934927A1 "Process and plant for the production of urea with high conversion yield and low energy consumption" |
| 08/11/1999 | CN1225626A 2-chloro-3,5-bis (trifluoromethyl) phenyl benzoyl urea derivative and process for preparing same |
| 08/11/1999 | CN1044601C Process and device to improve performances and service life, with corrosion reduction,in caldron type carbamate condensers in urea plants |
| 08/10/1999 | US5936122 Urea synthesis process and apparatus therefor |
| 08/04/1999 | CA2259872A1 Process and plant for the production of urea with high conversion yield and low energy consumption |
| 07/28/1999 | EP0931762A1 Process for the preparation of hydrogen-rich gas |
| 07/20/1999 | US5925762 Reacting primary phenyl carbamate or thiocarbamate with ammonia, a primary or secondary amine in dimethylsulfoxide |
| 07/14/1999 | CN1044115C Technology for production of urea |