公开(公告)号：US4990659A

公开(公告)日：1991-02-05

申请号：US384064

申请日：1989-07-20

申请人： Dakka Jihad ,  Zoran Amikam ,  Yoel Sasson

发明人： Dakka Jihad ,  Zoran Amikam ,  Yoel Sasson

IPC分类号： C07C205/57 ,  B01J31/34 ,  B01J31/36 ,  B01J31/38 ,  C07B61/00 ,  C07C51/265 ,  C07C63/04 ,  C07C63/70 ,  C07C65/21 ,  C07C67/00 ,  C07C201/00

CPC分类号： C07C51/265

摘要： A process for the manufacture of benzoic acid derivatives is described. The process is based on the reaction of a toluene derivative in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transition metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br.sup.-, F.sup.-, Cl.sup.-, OH.sup.-, CH.sub.3 COO.sup.- or HSO.sub.4.sup.31 . The benzoic acid derivatives produced are characterized by their very high purity and high conversion reaching generally values of above 95%.