The liquid phase methanol carbonylation to methyl formate has been inv
estigated both with homogeneous sodium methoxide, the industrial catal
yst for this process, and with heterogeneous strongly basic resins. Th
e strongly basic resins Amberlyst A26 and Amberlite IRA 400 displayed
a higher activity than sodium methoxide. The activation procedure and
the dependence of the reaction rate on CO pressure have also been inve
stigated.