METHOD OF PRODUCING UNSATURATED CARBOXYLATES Russian patent published in 2014 - IPC C07C67/55 B01J19/30 B01J19/32 B01J8/02 B01J23/38 C07C69/15 C07C69/01 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing unsaturated carboxylates by reacting alkenes containing 2-6 carbon atoms with alkane carboxylic acids containing 1-6 carbon atoms, in the presence of an oxygen-containing gas and a noble metal-based heterogeneous catalyst via a continuous process in a homogeneous gas phase in a reactor. The gas phase is fed into recycling gas and before entering the reactor, is saturated with an alkane carboxylic acid in a saturated designed for this purpose, where before the saturator for saturating with an alkane carboxylic acid (main saturator), there is a pre-saturator in which the recycling gas is saturated with a portion of the alkane carboxylic acid used for saturation, after which the recycling gas is fed into the main saturator and saturated therein with the remaining amount of the alkane carboxylic acid. The invention also relates to an apparatus for realising said method.

EFFECT: use of the presaturator for saturating with acetic acid prolongs the time interval between stoppages of the production process for cleaning the equipment.

10 cl, 1 dwg