To efficiently produce a high-quality fatty acid ester, which is usable as a biodiesel fuel, from a free fatty acid residual oil.
A free fatty acid residual oil is esterified by reacting it with a monovalent alcohol in the presence of a cation exchange resin, and a resulting esterification reaction solution is treated with an anion exchange resin. The use of the cation exchange resin as an esterification catalyst allows production of a fatty acid ester at a high conversion rate with an addition amount of the monovalent alcohol substantially equal to a stoichiometric proportion, and a subsequent treatment with the anion exchange resin allows a transesterification reaction of a triglyceride derived from a raw material by the catalytic effect of the anion exchange resin, in addition to adsorptive removal of the residual fatty acid or a pigment component. As a result, the high-purity fatty acid ester can be efficiently produced.
YONEMOTO TOSHIKUNI
IHARA TORU
TAKAYANAGI HIROAKI
TOHOKU TECHNO ARCH CO LTD
| JP2010195938A | 2010-09-09 | |||
| JP2009190989A | 2009-08-27 | |||
| JP2008001856A | 2008-01-10 | |||
| JP2010209284A | 2010-09-24 | |||
| JP2010195938A | 2010-09-09 |