| 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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| 02/18/1981 | EP0023976A1 N-Aryl-N'-acryloyl ureas; process for their preparation and their use as microbicides |
| 02/10/1981 | US4250324 Water-degradable esters and process for the preparation thereof |
| 02/03/1981 | US4248967 By hydrolysis and resolution |
| 02/03/1981 | US4248788 Substituted benzodioxane, benzodioxole and benzodioxepine compounds |
| 01/20/1981 | CA1094104A1 Process for preparing a urea solution from nh.sub.3 and co.sub.2 |
| 12/30/1980 | US4242273 4-(Monoalkylamino)benzoic acid amides and imidates |
| 12/23/1980 | CA1092155A1 Method for the production of urea of high mechanical strength |
| 12/23/1980 | CA1092125A1 Process for preparing amino-phenyl-ureas and amino- carbanylates |
| 12/16/1980 | CA1091687A1 Dyeing compositions for human hair and novel etheroxydes in the composition of same |
| 12/16/1980 | CA1091661A1 .alpha.-HALOMETHYL DERIVATIVES OF .alpha.-AMINO ACIDS |
| 12/10/1980 | EP0019881A1 Urea prills with improved properties and their production |
| 12/09/1980 | US4238503 Anilide urea biocides |
| 12/02/1980 | US4237227 Process for preparing D-N-carbamoyl-α-amino acids |
| 11/26/1980 | EP0019326A1 Process for purifying urea-containing waste water and process for preparing melamine |
| 11/25/1980 | US4235816 Ammonia absorption of carbon dioxide from stream containing it, hydrogen and nitrogen; multistage |
| 11/13/1980 | WO1980002425A1 Process for concentrating aqueous urea solution |
| 11/12/1980 | EP0018420A1 Method of synthesizing urea |
| 11/04/1980 | US4231961 Process for preparation of urea |
| 11/04/1980 | US4231960 Process for the purification of urea solutions containing biuret and the like |
| 11/04/1980 | US4231839 After-treatment processes and apparatus, especially for urea and ammonium nitrate plants |
| 10/15/1980 | EP0017180A2 Arrangement at the compressor of a urea-synthesis plant |
| 09/17/1980 | EP0015567A1 Process for preparation of phenylcarbamic acid chlorides |
| 09/09/1980 | US4221817 Method for the control of phytopathogenic fungi using phenylalkoxyphenylurea compounds |
| 09/03/1980 | EP0015083A1 Pyromellitic diimide complexes, their preparation, compositions containing them and their use in improving the feed efficiency of ruminants |
| 09/02/1980 | US4220749 Process for the production of modified polyisocyanates |
| 08/26/1980 | US4219561 Adrenergic blocking agents, hypotensive, antiarrhythmia, angina pectoris |
| 08/26/1980 | CA1084527A1 Process for preparing guanidine |
| 08/20/1980 | EP0014555A1 Amine salts of substituted N-phosphonomethylureas, process for production thereof, compositions containing them and their use as plant growth regulators |
| 08/20/1980 | EP0014381A1 Phosphorylated carbamoyl compounds, process for preparing them and their use as pesticides |
| 08/19/1980 | US4218397 Decomposing ammonium carbamate, diluting with purge gas to reduce oxygen concentration |
| 08/19/1980 | US4218390 Method for preparing biuret-structure polyisocyanates |
| 08/12/1980 | CA1083594A1 Process for the preparation of polyisocyanates containing urethane and biuret groups |
| 07/09/1980 | EP0012973A1 Process for the preparation of bi- and/or polyuret-polyisocyanates; products obtained by this process and their use in the preparation of polyurethanes |
| 07/08/1980 | US4211878 Alkanolamine derivatives |
| 07/08/1980 | CA1081226A1 Uracil derivatives and production thereof |
| 07/01/1980 | US4210600 Using heat exchanger to obtain better thermal balance |
| 06/17/1980 | US4208347 Process for the synthesis of urea |
| 06/10/1980 | US4207256 Treatment of water vapor generated in concentrating an aqueous urea solution |
| 05/20/1980 | US4204053 Method for the production of urea of high mechanical strength |
| 05/20/1980 | US4203916 Preparation of trans cyclohexane 1,4 diisocyanate |
| 05/20/1980 | CA1077956A1 Process for the preparation of polyisocyanates which contain biuret groups |
| 04/30/1980 | EP0010256A2 Process for preparing symmetric 1,3-disubstituted ureas |
| 04/22/1980 | CA1076131A1 Method for the transesterification of thiocarbamic acid esters |
| 04/08/1980 | CA1075263A1 Urea reactor effluent solution recycle in urea synthesis |
| 03/25/1980 | CA1074333A1 Method for synthesizing n-methyl-ureas |
| 03/06/1980 | WO1980000343A1 Method of synthesizing urea |
| 03/04/1980 | US4191552 Amine salts of substituted N-phosphonomethylureas and their use as plant growth regulators |
| 03/04/1980 | CA1072980A1 Process for separating and recovering unreacted materials in urea synthesis |
| 02/12/1980 | US4188489 From a hydrazine containing a sulfo group and a beta-substituted amino-beta-alkoxy acrylic acid derivative |
| 02/12/1980 | US4188292 Ion exchanging, reaction with nitric oxide, nitrous acid or nitrite salt |
| 02/05/1980 | CA1070930A1 Pollution control process for fertilizer plant |
| 01/15/1980 | CA1069932A1 Method for the condensation of carbamate in urea-synthesis installations |
| 01/15/1980 | CA1069844A1 Method for the preparation of d-carbamyl amino-acids and the corresponding d-aminoacids |
| 01/09/1980 | EP0006252A1 Process for preparing a thixotropic agent |
| 01/01/1980 | US4181782 Preparation of polyisocyanates having biuret groups and their use in synthetic foamed resins and lacquers |
| 12/25/1979 | CA1068717A Process for the preparation of carbamate and urea derivatives |
| 12/11/1979 | US4178442 Antiangorous activity |
| 12/11/1979 | US4178309 Manufacture of symmetrical dialkylureas |
| 12/04/1979 | US4177342 From carbamate(urethane)-containing alcohols and polyisocyanates |
| 11/06/1979 | US4173615 Chemical apparatus for corrosive materials |
| 10/23/1979 | CA1065093A1 Process for the production of water-soluble or water-dispersible blocked polyisocyanates |
| 10/09/1979 | CA1064051A1 Treatment of water vapor generated in concentrating an aqueous urea solution |
| 10/09/1979 | CA1063778A1 Method of pan granulation |
| 10/02/1979 | CA1063613A1 1-aryl-5-alkylidene-2,4-dioxo-imidazolidines |
| 09/05/1979 | EP0003835A1 A hydroxy-urea, process for producing the same and a process for producing a phenyl-substituted N-methoxy-N-methyl-urea |
| 08/22/1979 | EP0003505A1 Process for the preparation of organic polyisocyanates containing biuret and/or urea groups, as well as dispersions of polyisocyanates containing urea groups in a diisocyanate free of urea |
| 08/14/1979 | CA1060472A1 Method of recovering unreacted materials and heat in urea synthesis |
| 07/24/1979 | CA1059145A1 Process for separating and recovering unreacted materials in urea synthesis |
| 07/10/1979 | CA1058174A1 Method for the synthesis of ureas |
| 07/03/1979 | US4160080 Strong acid catalysts, lacquers |
| 06/27/1979 | EP0002526A1 Process for simultaneously preparing 1,3-substituted ureas and 1,2-diols |
| 06/26/1979 | US4159344 Bactericides, fungicides |
| 06/26/1979 | CA1057304A1 Process for manufacture of isobutylidene diurea |
| 06/19/1979 | CA1056841A1 Organic compounds which contain uretdione groups and blocked isocyanate end groups |
| 06/13/1979 | EP0002298A2 Process and apparatus for the removal of ammonium carbamate from a urea-synthesis solution |
| 06/12/1979 | US4158095 Process for the preparation of 5-(4-amino butyl)-hydantoin and/or 2-ureido-6-amino-hexanoic acid amide |
| 06/05/1979 | US4157348 Process for preparing guanidine |
| 05/29/1979 | CA1055523A1 Process for the preparation of phloroglucinol |
| 05/15/1979 | US4154760 Process for controlling the temperature during urea synthesis |
| 05/01/1979 | US4152445 1-(3-Hydroxyalk-1-yl)-5-(carboxyalkyl)hydantoin derivatives |
| 05/01/1979 | CA1053701A1 Integrated urea-ammonia process |
| 05/01/1979 | CA1053660A1 Adducts of carbamoyl sulphoxides |
| 05/01/1979 | CA1053444A1 Chemical process and apparatus therefor |
| 04/04/1979 | EP0001251A1 Process for preparing substituted ureas |
| 04/03/1979 | US4147796 1-(3-Hydroxyalk-1-yl)-5-(carboxyalkyl)hydantoin derivatives |
| 04/03/1979 | US4147714 Vapor reaction of diamines and diisocyanates |
| 04/03/1979 | CA1051802A1 Amino acid derivatives and a process for the preparation thereof |
| 03/13/1979 | US4144268 Sulfonation |
| 02/27/1979 | CA1049556A1 Urea manufacture |
| 02/06/1979 | US4138434 Integrated ammonia-urea producing process, for the production of urea |
| 01/30/1979 | US4137262 From carbon dioxide and ammonia, two-step decomposition of reaction product |
| 01/24/1979 | EP0000348A1 Polyuret polyisocyanates, preparation thereof and their use in the preparation of polyurethanes. |
| 01/23/1979 | US4136256 4-(monoalkylamino)benzoic acid imidates |
| 01/16/1979 | CA1046665A1 Inexpensive purification of urea waste streams |
| 01/16/1979 | CA1046522A1 Process for preparing phenylglycines |
| 01/10/1979 | EP0000299A1 Novel derivatives of substituted 2-benzoyl-4-chloro-glycinanilides, their preparation and their use as medicines. |
| 01/10/1979 | EP0000194A1 Preparation of isocyanate-substituted allophanates and their use for the preparation of lacquers |
| 12/20/1978 | EP0000016A1 Process for the preparation of allophanates-substituted polyisocyanates and their use in the manufacture of polyurethane products |
| 12/12/1978 | CA1044257A1 Treatment of water vapor generated in concentrating an aqueous urea solution |
| 11/28/1978 | US4127599 Process for the preparation of polyisocyanates having biuret groups |