公开(公告)号：EP1163199B1

公开(公告)日：2004-05-26

申请号：EP00917010.1

申请日：2000-03-24

申请人： Codignola, Franco ,  Moro, Antonio

发明人： Codignola, Franco ,  Moro, Antonio

IPC分类号： C07C51/265 ,  C07C63/00 ,  C07C63/26 ,  C07C63/24 ,  B01J8/00

CPC分类号： C07C51/265 ,  B01J8/006 ,  B01J19/1862 ,  B01J2219/00006 ,  B01J2219/00103 ,  B01J2219/00105 ,  B01J2219/00162 ,  C07C63/26 ,  C07C63/24

摘要： A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. The novel process according to the present invention comprises the steps of: a) catalytically oxidizing the corresponding aromatic precursors in liquid phase in the presence of gaseous oxygen; b) filtering the end product; c) recycling into the oxidation reactor at least part of the mother liquors resulting from the filtration stage, and is characterized by the fact that said steps from (a) to (c) are carried out in a closed and continuous cycle operating substantially under the same pressure and temperature conditions, preferably at 2-10 barg and 100-140 °C.

公开(公告)号：EP1303473A1

公开(公告)日：2003-04-23

申请号：EP01943507.2

申请日：2001-06-13

申请人： Eurotecnica Development & Licensing S.r.l. ,  Moro, Antonio,Poliolo S.P.A

发明人： CODIGNOLA, Franco

IPC分类号： C07C51/265 ,  C07C51/42 ,  C07C63/00

CPC分类号： C07C51/487 ,  C07C63/307 ,  C07C63/16 ,  C07C63/24 ,  C07C63/38 ,  C07C63/26

摘要： A novel process for the purification of crude aromatic carboxylic acids, such as, for example, terephthalic acid, orthophthalic acid, trimesic acid, isophthalic acid, 2,6-napththalenedicarboxylic acid and pyromellitic acid, which are obtained by oxidising the corresponding aromatic precursors is described; the process is based on the subsequent oxidation in heterogeneous phase of the crude product in aqueous solution.

公开(公告)号：EP1163199A1

公开(公告)日：2001-12-19

申请号：EP00917010.1

申请日：2000-03-24

申请人： Codignola, Franco ,  Moro, Antonio

发明人： Codignola, Franco ,  Moro, Antonio

IPC分类号： C07C51/265 ,  C07C63/00 ,  C07C63/26 ,  C07C63/24 ,  B01J8/00

CPC分类号： C07C51/265 ,  B01J8/006 ,  B01J19/1862 ,  B01J2219/00006 ,  B01J2219/00103 ,  B01J2219/00105 ,  B01J2219/00162 ,  C07C63/26 ,  C07C63/24

摘要： A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. The novel process according to the present invention comprises the steps of: a) catalytically oxidizing the corresponding aromatic precursors in liquid phase in the presence of gaseous oxygen; b) filtering the end product; c) recycling into the oxidation reactor at least part of the mother liquors resulting from the filtration stage, and is characterized by the fact that said steps from (a) to (c) are carried out in a closed and continuous cycle operating substantially under the same pressure and temperature conditions, preferably at 2-10 barg and 100-140 °C.

公开(公告)号：EP1214284A1

公开(公告)日：2002-06-19

申请号：EP00918877.2

申请日：2000-04-13

申请人： Codignola, Franco ,  Moro, Antonio

发明人： Codignola, Franco ,  Moro, Antonio

IPC分类号： C07C51/265 ,  C07C51/47 ,  C07C51/487 ,  C07C63/00

CPC分类号： C07C51/487 ,  C07C51/265 ,  C07C51/47 ,  Y10S210/912 ,  C07C63/24 ,  C07C63/26

摘要： A description is given here of a novel process for the production of monocarboxylic and polycarboxylic aromatic acids by the catalytic oxidation in homogeneous phase of aromatic compounds carrying at least one oxidisable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. This process comprises a purification step in which the crude product resulting from the oxidation stage is supplied to a filling column containing a bed of material having a high adsorbent power with respect to hafnium and/or zirconium polyoxides, operating at a temperature of from 200 to 300 °C and at a pressure of from 30 to 90 barg.