Hydroformylation catalytic system and use

Abstract

The present invention relates to a catalysis system capable of utilizing methyl alcohol carbonylation to prepare acetic acid and utilizing methyl acetate carbonylation to prepare acetic anhydride. Said catalysis system contains rhodium compound as catalyst, tin compound as stabilizing agent and iodine alkyl as catalyst promoter. Under the condition of low temperature said catalysis system has highspeed and high selectivity.

Description

technical field [0001] The invention relates to a oxo synthesis catalytic system. [0002] The present invention also relates to the application of the above catalyst system in the preparation of acetic acid and acetic anhydride by oxo synthesis. Background technique [0003] In the 1970s, Paulik et al. of Monsanto Company invented a homogeneous rhodium oxo catalyst (US 3769329), which opened up a new implementation path for carbon monoxide and methanol oxo synthesis to prepare acetic acid under the action of a catalyst. After continuous improvement and perfection, the oxo synthesis technology using rhodium as a catalyst has become the process production route with the largest output in the acetic acid industry. [0004] In the current industrialized production, the rhodium square planar negative ion structure complex [Rh(CO) 2 I 2 ] - as a catalytically active species. Although this type of catalyst structural model has good catalytic activity, it is easy to convert in...

AI Technical Summary

Problems solved by technology

Although people have done detailed research on the carbonylation of transition metal methyl acetate such as Rh, Pd, Ru, Ni, Co, etc. to synthesize acetic anhydride, only the rhodium catalyst system has better catalytic efficiency and is applied to industrial production.