Metathesis: New high effective catalysts (B_2O_3-Re_2O_7/Al_2O_3-SiO_2 + SnBu_4 and MeReO_3 + B_2O_3-Al_2O_3-SiO_2) were developed for the metathesis of unsaturated fatty acid esters. They were used for the synthesis of #omega# unsaturated esters, middle-chained esters, branched esters, dicarboxylic acid esters and pre-pheromones. The metathesis of unsaturated esters with ethylene was tested successfully in a continuous miniplant. Selective oxidations: unsaturated fatty acid esters were converted to keto fatty acid esters catalysed by PdSO_4/heteropoly acid using O_2 or H_2O_2. By Ruthenium catalysis/peracetic acid or Re_2O_7/H_2O_2 the oxidative C=C-cleavage to dicarboxylic acids was achieved. Oleochemical di- and polyols were produced by ...