23,3 West and Gonzaga: Hydrogenation of Philippine Oils 285 



West and Smith made various commercial products, such 

 as paints, varnishes, putties, soaps, and printing inks, from 

 lumbang and linseed oils under identical conditions. 12 Their 

 results show that as a drying oil lumbang appears to be just 

 as good as linseed, and either oil can be used as an efficient 

 substitute for the other. 



Table 2. — Hydrogenation of lumbang oil* 



— — 



NiCel. 



0.5 per cent. 



percent. 



,„«. 1 



ea 



"KB? 



Ctt 



M P S< 



LtK: 



■js? 



Hours. 



'Stw 



££.6 



121.9 



H, 



120.25 



i|: 





















When oils are subjected to catalytic hydrogenation the 

 unsaturated glycerides (linolenic, linolic, and oleic) absorb 

 hydrogen and are gradually converted to stearin on complete 

 reduction, while incomplete reduction leads to the formation of 

 mixed glycerides which are partly unsaturated as shown by the 

 iodine value of the reaction product. 



The results of hydrogenating lumbang oil for various intervals 

 of time with different concentrations of catalyst are given in 

 Table 2. As shown by the data, lumbang oil is easily hydrogen- 

 ated when reduced with an effective catalyst. For each period 

 of hydrogenation, increase in the concentration of catalyst from 

 0.5 to 1 per cent of nickel gave a decrease in the iodine value 

 and an increase in the melting point. Similar results were 

 expected for an increase from 1 to 3 per cent in the concen- 

 tration of the catalyst. Hydrogenation with 3 per cent nickel 



■ Bull. Philip. Bureau Forestry 24. In press. 



