The application relates to a process which comprises:
A)forming a reaction product composition comprising arylcarboxylic acid or substituted arylcarboxylic acid in a polar organic solvent medium by palladium-catalyzed hydrocarboxylation of an arylolefin or substituted arylolefin in a liquid medium comprising polar organic solvent, water, HCl, and at least one ether;
B)mixing with said reaction product composition an aqueous solution of inorganic base to form a mixture comprising an aqueous phase containing dissolved inorganic salt of said arylcarboxylic acid or substituted arylcarboxylic, and before and/or during and/or after such mixing, distilling a substantial portion of the ether from the reaction mixture, such that a mixture of residual organic phase and such aqueous phase remain as a distillation residue;
C)separating the phases from each other;
D)distilling residual organic impurities from the aqueous phase and providing an aqueous solution having a concentration in the range of 10 and 35 wt%, by, if necessary, adjusting the concentration of such aqueous solution by removal therefrom or addition thereto of water;
E)washing the aqueous solution with non-polar organic solvent at least twice;
F)mixing non-oxidizing mineral acid with the aqueous phase in the presence of non-polar liquid solvent to form (i) an organic phase composed of a solution of arylcarboxylic acid or substituted arylcarboxylic acid in non-polar liquid organic solvent and (ii) an aqueous phase;
G)separating the phases from each other; and
H)crystallizing arylcarboxylic acid or substituted arylcarboxylic acid from organic solvent.
该申请涉及一种工艺,其中包括
A)在由极性有机溶剂、
水、
盐酸和至少一种醚组成的液体介质中,通过
钯催化芳基烯烃或取代芳基烯烃的加氢羧化反应,在极性有机溶剂介质中形成包含芳基
羧酸或取代芳基
羧酸的反应产物组合物;
B)将
无机碱水溶液与所述反应产物组合物混合,以形成一种混合物,该混合物包括一种
水相,其中含有溶解的所述芳基
羧酸或取代芳基
羧酸的
无机盐,并且在混合之前和/或混合期间和/或混合之后,从反应混合物中蒸馏出大部分醚,从而使残留有机相和这种
水相的混合物作为蒸馏残留物保留下来;
C)将两相相互分离;
D)从
水相中蒸馏出残留的有机杂质,并提供浓度在 10 至 35 wt%范围内的
水溶液,必要时可通过从
水溶液中除去
水或加入
水来调整
水溶液的浓度;
E)用非极性有机溶剂洗涤
水溶液至少两次;
F)在非极性液体溶剂存在下,将非氧化性矿物酸与
水相混合,形成(i)由芳基
羧酸或取代芳基
羧酸在非极性液体有机溶剂中的溶液组成的有机相和(ii)
水相;
G)将两相相互分离;以及
H)从有机溶剂中结晶出芳基
羧酸或取代芳基
羧酸。