新疆夏子街膨润土的特性及其酸活化产品脱色性能的研究

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新疆夏子街膨润土的特性及其酸活化产品脱色性能的研究

武占省^a; 李春^a,c; 孙喜房^a; 徐小琳^a; 代斌^a; 李金娥^a; 赵宏生^b

^a School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
^b Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
^c School of Life Science and Technology, Beijing Institute of Technology, Beijing 100081, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-04-28 发布日期:2006-04-28
通讯作者: 李春

Characterization, Acid Activation and Bleaching Performance of Bentonite from Xinjiang

WU Zhansheng^a; LI Chun^a,c; SUN Xifang^a; XU Xiaolin^a; DAI Bin^a; LI Jin'e^a; ZHAO Hongsheng^b

^a School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
^b Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
^c School of Life Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-04-28 Published:2006-04-28
Contact: LI Chun

摘要/Abstract

摘要： 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 and illite and minor amounts of kaolinite, gypsum, etc. The raw bentonite has a CEC of 0.6497 meq∙g－1 and allows 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.

关键词: bentonite;characterization;acid-activation;bleaching capacity;Xiazijie

Abstract: 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 and illite and minor amounts of kaolinite, gypsum, etc. The raw bentonite has a CEC of 0.6497 meq∙g－1 and allows 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.

Key words: bentonite, characterization, acid-activation, bleaching capacity, Xiazijie

武占省, 李春, 孙喜房, 徐小琳, 代斌, 李金娥, 赵宏生. 新疆夏子街膨润土的特性及其酸活化产品脱色性能的研究[J]. , DOI: .

WU Zhansheng, LI Chun, SUN Xifang, XU Xiaolin, DAI Bin, LI Jin'e, ZHAO Hongsheng. Characterization, Acid Activation and Bleaching Performance of Bentonite from Xinjiang[J]. , DOI: .

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