WANG Yantao, LI Kunlan, MA Yingchong, et al. Catalytic performance of [C16H33N(CH3)3]3[PO4(WO3)4] in fatty acid methyl ester epoxidation[J]. CIESC Journal, 2015, (3): 1007-1011. DOI: 10.11949/j.issn.0438-1157.20141518.
WANG Yantao, LI Kunlan, MA Yingchong, et al. Catalytic performance of [C16H33N(CH3)3]3[PO4(WO3)4] in fatty acid methyl ester epoxidation[J]. CIESC Journal, 2015, (3): 1007-1011. DOI: 10.11949/j.issn.0438-1157.20141518.DOI:
The influence of reaction conditions on epoxidation of unsaturated fatty acid methyl ester (FAME) under acid and solvent free conditions with [C16H33N(CH3)3]3[PO4(WO3)4] as a reaction controlled phase transfer catalyst was investigated. The results indicated that pH of the aqueous phase was the most important factor and the proper pH value of solution was 4. With molar ratio of hydrogen peroxide to double bond in FAME is 1.05:1
reaction at 50—60℃ for 5 h
the catalyst could be recycled 5 times without deactivation
and epoxy value of the product was more than 4.0%
while iodine value was less than 5 g I·(100 g)-1. Change of catalyst during the epoxidation process was investigated with IR spectroscopy and elemental analysis
and the result indicated that decomposition of heteropolyphosphatotungstate anion was the key reason for catalyst deactivation.