期刊论文

THE CHANGES OF COLOURS,SMOKE POINT AND PEROXIDE VALUE OF COTTEN SEED OIL DURING BLEACHING

中文

湖南农业大学学报(自然科学版)

1007-1032

1998

24

3

216-220

10.13331/j.cnki.jhau.1998.03.011

湖南省科委资助；

本校为第一机构

在棉籽油中添加不同用量的白土作脱色和复脱色试验，测定棉籽油脱色过程中色泽，烟点和过氧化值等几项指标的变化，发现在真空条件下，白土能有效地脱除过氧化物，且随着脱色次数的增加，烟点下降，过氧化值下降，黄色变浅，但蓝色与红色在第三次脱色时反而加深，此外，先用占油重３％的白土脱色，再用占油重２％的白土脱色，效果较佳。

By determining the changes of colours,peroxide value and smoke point of bleached cottonseed oil during bleaching,we′ve discovered that bleaching earth can remove peroxide from oil effectively under vacuum condition.With the increase of bleaching times,smoke point and peroxide value descend,yellow becomes light while blue and red turn slightly deeper during the third bleaching.Besides if the amount of bleaching earth used in the first bleaching is 3% of the oil a...