WERKWIJZE VOOR HET CARBONYLEREN VAN EEN ALKEEN, EEN ALKOHOL, OF EEN ESTER-, HALOGENIDE- OF ETHERDERIVAAT VAN DEZE ALKOHOL.

摘要

1355146 Carbonylation process MONSANTO CO 7 March 1972 [10 Nov 1971] 10586/72 Heading C2C An ethylenically unsaturated compound, a compound containing one or more -OH groups, or an ester, halide or ether is carbonylated with CO in the liquid phase and in the presence of a catalyst comprising Rh or Ir and I or Br in a reaction zone (10) and at least a portion of the liquid reaction mass so formed is passed to a separation zone (16) maintained at a pressure substantially below that of the reaction zone (e.g. via pressure let-down valve (15)), thus vaporizing at least a portion of the carbonylation products without the addition of heat. The liquid remaining in the separation zone after the vaporization comprising the catalyst system may be recycled to the reaction zone (line (18)). The pressure difference between the reaction zone and the separation zone is preferably at least 20 p.s.i. and the carbonylation reaction is preferably effected at 50-500‹ C. and 50- 1500 p.s.i.a. A residence time for the liquid reaction mass in the separation zone of at least one minute and a pressure of 10-200 p.s.i.a. in the separation zone are preferred. The examples describe the carbonylation of methanol to produce acetic acid but many more starting materials. (e.g. C 2 H 4 ) are specified.