Polymers and polymer building blocks from meadowfoam oil

Meadowfoam oil methyl ester was metathetically cleaved with ethylene catalyzed by Re₂O₇–B₂O₃/Al₂O₃–SiO₂ + SnBu₄ or bis(tricyclohexyl phosphine) benzylidene ruthenium dichloride yielding -olefins, ,ω-dienes and 5-hexenoic acid methyl ester as the main product. The corresponding ω-epoxy fatty acid ester was achieved by chemoenzymatic epoxidation with H₂O₂ in the presents of Novozym^® 435. Glutaric acid mono methyl ester was synthesized by ruthenium-catalyzed oxidative cleavage with peracetic acid. Hydrocarboxylation with carbon monoxide/methanol yielded pimelic acid dimethyl ester. Metathetical dimerization of 5-hexenoic acid methyl ester yielded 5-decen-dioic acid dimethyl ester, which was subsequently polycondensed with ethylene glycole and 1,4-butanediol to high molecular weight polyesters. The ω-unsaturated ester was directly copolymerized with ethylene by an insertion-type palladium-catalyzed reaction to a high molecular weight functional polyolefin. The 5-epoxy hexanoic acid ester was polymerized to a comb like polyether.     

多聚磷酸催化罗汉柏木烯异构化反应工艺

以柏木油为原料,对柏木油中罗汉柏木烯异构化生成Olefin B的催化剂种类及影响因素进行了对比研究。结果表明,以多聚磷酸为催化剂,质量比为柏木油∶冰醋酸∶多聚磷酸=45∶18∶8,反应温度为50℃,反应时间为3 h,Olefin B含量可达10.3%,产率25.8%。