NOVELTY - An alcoholysis process for producing at least one of a dialkyl carbonate, diaryl carbonate, alkyl-aryl carbonate, biodiesel, organic ester and organic carbamate (M1) involves: feeding reactants and a trace amount of soluble organometallic compound to a reactor comprising a solid alcoholysis catalyst, where the soluble organometallic compound and the solid alcoholysis catalyst each comprises a Group II to Group VI element.    USE - For production of dialkyl carbonate (selected from diethyl carbonate and dimethyl carbonate), diaryl carbonate (selected from diphenyl carbonate), alkyl-aryl carbonate, biodiesel, organic ester and organic carbamate (all claimed).    ADVANTAGE - The soluble organometallic compound is continuously fed to the reactor at very low levels to sustain the solid catalyst activity for an extended cycle length. The method provides improved catalyst performance.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) production (M2) of dialkyl carbonates involving feeding an alcohol, and alcoholysis reactant comprising at least one of urea, organic carbamate, and cyclic carbonate to a first reaction zone comprising the solid alcoholysis catalyst and feeding the soluble organometallic compound to the first reaction zone;    (2) production (M3) of diaryl carbonate involving feeding an aromatic hydroxy compound and a dialkyl carbonate to a first reaction zone comprising the solid transesterification catalyst and feeding the soluble organometallic compound to the first reaction zone;    (3) production (M4) of an alkyl aryl carbonate involving feeding an aromatic hydroxy compound and a dialkyl carbonate to a first reaction zone comprising a solid transesterification catalyst and feeding a soluble organometallic compound to the first reaction zone;    (4) production (M5) of biodiesel involving feeding an alcohol and glyceride to a first reaction zone comprising a solid transesterification catalyst and feeding a soluble organometallic compound to the first reaction zone; and    (5) a process (M6) for reactivating a spent solid alcoholysis catalyst involving removing polymeric materials deposited on the catalyst and re-depositing catalytically active metals on the solid catalyst.