中国化学工程学报（英文版）
中國化學工程學報（英文版）
중국화학공정학보（영문판）
CHINESE JOURNAL OF CHEMICAL ENGINEERING
2006年
2期
253-258
,共6页
武占省%李春%孙喜房%徐小琳%代斌%李金娥%赵宏生
武佔省%李春%孫喜房%徐小琳%代斌%李金娥%趙宏生
무점성%리춘%손희방%서소림%대빈%리금아%조굉생
bentonite%characterization%acid-activation%bleaching capacity%Xiazijie
Bentonite produced in Xiazijie, Xinjiang (China) was characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), thermogravimetric analysis (TG) and cation exchange capacity (CEC). The bentonite is composed of dioctahedral montmorillonite with predominant quantity, certain amounts of quartz, feldspar to be characterized as typical sodium bentonite. In order to bleach cottonseed oil, optimum conditions for sulfuric acid activation of the raw bentonites were investigated, which were obtained by selecting various acid strength, at 96-98℃ and activating for 4h with 1: 2 solid-liquid ratio. The acid activation bentonites were suitable for decolorization of cottonseed oil through removing carotene and chlorophyll. The bleaching capabilities of different pigments with activated bentonite with treatment of 25% sulfuric acid were 70.3%, 73.1%, 83.2%, 81.8% and 88.9%,respectively. Bleaching with acid activated bentonite gave oils lower peroxide values and acid values.
