In hot water heated up to 250 degrees C and 4 MPa, methanol and formic acid
are produced from the Cannizzaro-type reaction of formaldehyde without a c
atalyst, although this disproportionation reaction is well-known to occur i
n the presence of a large amount of base catalysts in ambient conditions. F
ormic acid further undergoes the hydride transfer reaction with formaldehyd
e, and the final yield of methanol exceeds 50%.