Method of carbonylation of alkyl esters in the presence of a catalyst based on a noble metal of group viii

摘要

P the invention relates to the carbonylation of alkyl esters in the presence of a noble metal groupeviii as catalyst. / p & & p & it is thus obtained a reaction mixture containing volatile constituents (that is separate) and a catalyst based on a noble metal of the non-volatile groupeviii, which is recycled. It maintains the activity of the catalyst by providing, during the separation of the volatile products, the presence of a partial pressure of at least 0,7bar h and then a partial pressure of at least one bar of co, in particular when the system comprises a metal promoter of the catalyst. / p & & p & application: production of anhydride and after by carbonylation of acetate methyl styrene-b-acrylate. / p