Effects of metal chlorides and oxides on the autoxidation of methyl oleate and the decomposition of hydroperoxides of methyl oleate at 80°C were investigated by observing the changes in peroxide, iodine, saponification, acid and hydroxyl values and oxirane oxygen during the autoxidation of methyl oleate in the presence of benzoyl peroxide (0.1%) and the chlorides or oxides (0.05% as metal) and decomposition of hydroperoxide of methyl oleate in the presence of nitrogen under the same condition.
MoCl
5, VCl
3, VCl
4 and V
2O
5 decomposed hydroperoxide of methyl oleate remarkably, and produced little peroxide. On the autoxidation of methyl oleate and the decomposition of hydroperoxide, the epoxides and hydroxides were produced remarkably. MoCl
5 and V
2O
5 seemed to produce less acids than VCl
3 and VCl
4. Further, the effect of each metal compound seemed to be slightly different.
WCl
6 decomposed hydroperoxide of methyl oleate slowly, and produced epoxides and hydroxides in the presence of nitrogen. However, WCl
6 in the presence of air had a little effect.
CrCl
3·6H
2O affected the autoxidation of methyl oleate remarkably, and produced epoxides and hydroxides. On the decomposition of hydroperoxide of methyl oleate, CrCl
3·6H
2O decomposed hydroxide slowly, but didn't produce epoxides and hydroxides. One of the products of the autoxidation of methyl oleate in the presence of CrCl
3·H
2O was a low molecular acid and the effect of CrCl
3·6H
2O seemed slightly different from the other metal compounds.
MoO
3 and MnCl
2 didn't accelerate the autoxidation of methyl oleate and the decomposition of peroxide.
The each effect of the compounds of periodic group 5, 6 and 7 transition metal was dissimilar.
抄録全体を表示