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Selective hydrogenation of oleic acid to 9‐octadecen‐1‐ol: Catalyst preparation and optimum reaction conditions
Author(s) -
Cheah K. Y.,
Tang T. S.,
Mizukami Fujio,
Niwa Shuichi,
Toba Makoto,
Choo Y. M.
Publication year - 1992
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540940
Subject(s) - catalysis , ruthenium , tin , coprecipitation , yield (engineering) , oleic acid , chemistry , raw material , alcohol , selectivity , chloride , nuclear chemistry , oleyl alcohol , inorganic chemistry , organic chemistry , materials science , metallurgy , biochemistry
A new catalyst, ruthenium‐tin‐alumina is found to selectively hydrogenate oleic acid to 9‐octadecen‐1‐ol (oleyl + elaidyl alcohol) at low pressure with high yield. Catalyst preparation methods, catalyst raw materials and activation conditions have a significant effect on the activity of the catalyst. The optimum atomic ratio of ruthenium to tin is about 1:2. Catalyst prepared by an improved sol‐gel method shows higher activity and selectivity than catalysts prepared by impregnation and coprecipitation methods. Chloride is found to have a negative effect on catalytic activity. The best catalyst is prepared from chloride‐free ruthenium and tin raw materials. Under the optimum reaction conditions of 250°C and 5.6 MPa, the selectivities for 9‐octadecen‐1‐ol and total alcohol (9‐octadecen‐1‐ol + stearyl alcohol) formation are 80.9% and 97%, respectively, at a conversion of 81.3%.
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