From the bottom of the distillation zone a mixture (36; 157) of substituted acrolein and alkali catalyst solution is obtained.

A process for removing acetone from a methyl acetate, methyl iodide and acetone mixture includes the step of removing a side stream from the distillation zone rich in acetone.

At the first distillation stage, the melt is supplied from a column to the first distillation area, wherein said melt is disintegrated in a film heat exchanger in the carbon dioxide flow.

The native mineral, through the duct (3), reaches the cochlea of feeding (4) so to be fed in the distillation zone (5).

A typical feedstock to the process contains less than about 20 mol % water which is supplied to the first distillation zone.

The process is carried out by methylating the benzene/toluene present in the reformate in a reactive distillation zone and under reactive distillation conditions to produce a resulting product having a higher xylenes content than the reformate.

The method and system utilizes a sidedraw tray within the fractionator distillation zone upon which liquid is collected.