Effect of presence of phospholipids in oil on kinetic and chemism of hydrogenation reaction.

The effect of phospholipids (PL) on kinetics and chemism of hydrogenation o f rapeseed and soybean oils was investigated. Nickel catalysts, produced in Poland, were used. It has been confirmed that the presence of PL in hydrog enated oil poisons the catalyst and the reaction rate falls. So the extensi on of the reaction time or the necessity to use additional portions of the catalyst are required. In case of multiple use of the nickel catalyst, the amount of recycled catalyst is inversely proportional to the content of PL in the oil. Increase of PL content in the oil had no effeect on the reactio n chemism, including linoleic and linolenic selectivity and the rate of cis -trans isomerization. Inhibitory effect of PL on hydrogenation is si,signif icant for hydrogenation plants where the catalyst is used several times and the content of PL in oils varies.