公开(公告)号：EP1233941A4

公开(公告)日：2004-06-16

申请号：EP00905430

申请日：2000-02-17

申请人： KOREA KUMHO PETROCHEM CO LTD

发明人： JOO YOUNG J ,  KIM JIN-EOK ,  WON JEONG-IM ,  HWANG KUM-UI

IPC分类号： C07C209/02 ,  C07B61/00 ,  C07C209/00 ,  C07C209/36 ,  C07C211/56

CPC分类号： C07C209/02 ,  C07C211/56

摘要： Disclosed herein is a method for preparing 4,4'-dinitrodiphenylamine, comprising reacting urea and nitrobenzene in a polar organic solvent in the presence of a base at a temperature of room temperature to 1000 °C. The method employs a relatively cheap urea and nitrobenzene as the raw materials, and also employs a relatively cheap base, thereby decreasing the manufacturing costs. Moreover, the method does not produce by-products, thus eliminating a need for a post-treating process. Additionally, the method is advantageous in that the production of 4,4'-dinitrophenylamine can be achieved in high yield and selectively even under non-intensive reaction conditions by appropriately controlling the amounts of urea and nitrobenzene.

公开(公告)号：EP1230208A4

公开(公告)日：2004-09-29

申请号：EP00911452

申请日：2000-03-15

申请人： KOREA KUMHO PETROCHEM CO LTD

发明人： JOO YOUNG J ,  KIM JIN-EOK ,  WON JEONG-IM ,  HWANG KUM-UI

IPC分类号： C07C209/02 ,  C07B61/00 ,  C07C209/00 ,  C07C211/52 ,  C07C209/62

CPC分类号： C07C209/00 ,  C07C211/52

摘要： Disclosed herein is a method for preparing 4-nitrosoaniline, comprising reacting urea and nitrobenzene in a polar organic solvent in the presence of a base at a temperature of room temperature to 150 °C. The method uses a relatively cheap urea and nitrobenzene as the raw materials, and also a relatively cheap base, thereby decreasing the manufacturing cost. Urea used as an amine donor is excellent in a reactivity to nitrobenzene, and a reaction intermediate is unstable as compared with 4-(4-nitrophenyl)benzamide to easily decompose into 4-nitroaniline and 4-nitrosoaniline. This allows a reaction time and a process time to be shortened. Moreover, the method is advantageous in that waste hazardous to the environment is not produced as a byproduct.

公开(公告)号：EP1187801A4

公开(公告)日：2002-09-18

申请号：EP99957434

申请日：1999-12-04

申请人： KOREA KUMHO PETROCHEM CO LTD

发明人： JOO YOUNG J ,  KIM JIN-EOK ,  KIM CHANG-MIN ,  WON JEONG-IM ,  JOO HYUN-SANG

IPC分类号： C07C51/00 ,  C07B61/00 ,  C07C51/353 ,  C07C51/36 ,  C07C61/08

CPC分类号： C07C51/353 ,  C07C51/36 ,  C07C61/22 ,  C07C61/08

摘要： Disclosed herein is a method of preparing cyclohexanecarboxylic acid in which 1,3-butadiene and acrylic acid are subjected to [2+4] Diels-Alder reaction to produce 3-cyclohexene-1-carboxylic acid which is then hydrogenated. The [2+4] Diels-Alder reaction is carried out at a temperature of room temperature to 200 °C in an aromatic hydrocarbon solvent, such as toluene or xylene. The hydrogenation is carried out at a temperature of room temperature to 150 °C under a hydrogen pressure of 10 psi to 150 psi in the presence of the platinum of palladium catalyst. The disclosed method is featured in that it enables the use of 1,3-butadiene as the raw material for fine chemicals, unlike the prior methods. Moreover, the method disclosed is advantageous in that the reaction can be carried out in a relatively simple and easy manner and also the reaction by-products can be conveniently treated after the reaction.