Process for the production of (meth)acrylic acid by the catalytic vapour phase oxidation of isobutane or propane.

摘要

(Meth)acrylic acid is produced by reacting, at a temperature from 200 DEG C to 450 DEG C and in the vapour phase, oxygen and isobutane or propane respectively over a catalyst which contains MOx, Sby, Pz and combined oxygen wherein X, Y and Z represent the atomic ratios of Mo, Sb & P and X is 9 to 24, Y is 0.25 to 2 and Z is 0.5 to 2. In carrying out the process the amount propane or isobutane in the feed gas is from 10 to 70 mole per cent.