浙江大学学报（英文版）
浙江大學學報（英文版）
절강대학학보（영문판）
JOURNAL OF ZHEJIANG UNIVERSITY SCIENCE
2004年
12期
1524-1527
,共4页
杨亦文%闻光东%吴彩娟%任其龙%吴平东
楊亦文%聞光東%吳綵娟%任其龍%吳平東
양역문%문광동%오채연%임기룡%오평동
Tocopherol%Conversion%Hydroxymethylation%Hydrogenolysis
Non-α-tocopherols are hydroxymethylated and hydrogenated to produce α-tocopherol in one pot process bysimultaneously reacting with paraformaldehyde and hydrogen in the presence of catalysts of benzenesulfonic acid and 5%Pd/C in an autoclave. Effects of various operation conditions have been studied. The preferable reaction conditions are: temperature 180 ℃ to 200 ℃, pressure 5.0 MPa, acid concentration 0.5 g/100 ml ethanol, mass ratio of Pd/C to tocopherols 7.1 g/100 g, and reaction time 5.0 h. A product with α-tocopherol content of 80% was obtained by using a raw material with a total tocopherols content of 80.54%. The conversion of non-α-tocopherols is almost 100%, and the mole yield ofα-tocopherol is more than 90%.
