A number of zeolite catalysts synthesized on the basis of synthetic (NaA, NaX, NaY) and natural (mordenite, klinoptilolite) zeolites, modified by  Pd and Cu ions have been tested in the combination reactions of oxidation of methanol into formaldehyde, formic acid and methylformiate.  The highly-efficient catalysts have been chosen for oxidative conversion of methanol into formaldehyde (CuPdNaY) and direct oxidation of methanol into formic acid (Pd-mordenite) has been chosen. On the basis of the results of experimental investigation of kinetic regularities of proceeding the process  of direct oxidation of methanol to formic acid over the catalyst Pd-mordenite (0.1% Pd), a probable stage mechanism of the process is presented and its probable kinetic model has been elaborated