epoxidation

The epoxidation reaction of 1-octene by tert-butyl hydroperoxide in the presence of TiB2, TiC and TiSi2 was investigated.

Kinetic regularities of catalyst activation processes in the reaction of epoxidation of ethylallyl ethyl acrylate with tert-butyl hydroperoxide in the presence of Mo2B were investigated. It is shown that the activation of the catalyst, which takes place at the beginning of the epoxidation process, mainly occurs under the simultaneous action of tert-butyl hydroperoxide and olefin.

The influence of the reaction conditions on the selectivity of the interaction of oct-1-ene with tert-butyl hydroperoxide in the presence of MoB was investigated. It is shown that the selectivity of 1,2-epoxyoctane formation can vary depending on the reaction conditions.With the participation of the activated form of the catalyst, the selectivity increases significantly, but does not reach 100%. The optimal reaction conditions under which the selectivity of 1,2-epoxyoctane formation exceeds 90% have been established.

Catalytic ability of tungsten compounds in the reaction of hydroperoxide epoxidation of 1- octene and tert-butyl hydroperoxide decomposition was investigated. It is shown that the nature of ligand has significant effect on the catalytic activity of tungsten compounds in these reactions. It is established that boride and silicide of tungsten are the best choice for epoxidation reaction, whereas tungsten carbide exhibits poor activity. Tungsten boride is also the most active in the hydroxide decomposition reaction.

The influenceof vanadium-containing compounds as catalysts on the reaction of 1-octene epoxidation by tert-butyl hydroperoxide and the decomposition of this hydroperoxide was investigated. It is shown that the catalytic activity of vanadium compounds depends on catalyst ligand nature. It is established that vanadium boride and carbide are the most active catalysts for hydroperoxide epoxidation, while V2O5 is the most active catalyst oftert-butyl hydroxide decomposition. The highest selectivity of 1,2-epoxyoctene formation is observed when VC is used as a catalyst.

The epoxidation of oleic acid was carried out by using in situ generated performic acid (HCOOOH) to produce epoxidized oleic acid. Performic acid was formed by mixing formic acid (as oxygen carrier) and hydrogen peroxide (as oxygen donor). The epoxide ring is very reactive, especially in the presence of acidic condition making the epoxide a suitable intermediate for synthesis of other chemicals. The most likely side reaction that occurred in the in situ epoxidation is the reaction of oxirane ring with formic acid, which led to formation of diol and a-glycol as side products.

The complex formation of molybdenum and vanadium borides in the reaction system of 1-octene epoxidation with tert-butyl hydroperoxide by infrared spectroscopic analysis was studied. It was shown that 1-octene formed complex with metal moiety in a case of molybdenum boride and with boron moiety in a case of vanadium boride.

The synthesis of functional derivatives of epoxystearic acid methyl ester by oxirane ring opening and transesterification of ester group has been described. Some novel surface-active and peroxide-containing compounds have been obtained. Major features of the process have been investigated and main characteristics have been determined.

This paper investigates the curing of biodegradable polymer films which were synthesized from soybean oil through the ultraviolet radiation and their stability against thermal degradation. In this study the epoxidation of soybean oil has been carried out via peracetic method. Further, an epoxy acrylate resin was synthesized from the epoxidized soybean oil (ESO) by using acrylic acid monomer. Triethylamine (TEA) and hydroquinone were used as a catalyst and inhibitor respectively.