CATALYST FOR OBTAINING ACRYLIC ACID ETHERS ACCORDING TO A METATHESIS REACTION OF DIALKYLMALEATES (VARIANTS)AND A CATALYTIC COMPOSITION BASED THEREON

摘要

The invention relates to organic synthesis, in particular to producing a homogeneous catalyst for obtaining acrylic acid ethers according to a metathesis reaction of maleates with ethylene. The invention discloses two catalyst variants for producing acrylic acid ethers according to a metathesis reaction of dialkylmaleates with ethylene, i.e. a catalyst of formula (I) and a catalyst of formula (II). The use of said catalysts makes it possible to increase the number of circuitings thereof in the metathesis reaction of dialkylmaleate with ethylene at moderate temperatures (near 50°C) when carrying out a process without product stripping and at temperatures near 120°C when the obtained acrylate is stripped from a reaction mixture. A catalytic composition which makes it possible to increase the number of circuitings and the service life of a catalyst and which is highly efficient at temperatures near 120°C, when the thus obtained acrylate is stripped from a reaction mixture, is also disclosed. The inventive composition contains the above-mentioned catalyst and 2-isopropoxystyrene or the derivatives thereof at a ratio of 1 catalyst molar equivalent to 5-100 molar equivalents of 2-isopropoxystyrene or the derivatives thereof.