Characterization, Acid Activation and Bleaching Performance of Bentonite from Xinjiang

被引：16

作者：

武占省 ^{[1
]}

李春 ^{[1
,2
]}

孙喜房 ^{[1
]}

徐小琳 ^{[1
]}

代斌 ^{[1
]}

李金娥 ^{[1
]}

赵宏生 ^{[3
]}

机构：

[1] School of Chemistry and Chemical Engineering, Shihezi University, Shihezi , China

[2] School of Life Science and Technology, Beijing Institute of Technology, Beijing , China

[3] Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing , China

来源：

ChineseJournalofChemicalEngineering | 2006年 / 02期

关键词：

bentonite; characterization; acid-activation; bleaching capacity; Xiazijie;

D O I：

暂无

中图分类号：

O611.3 [性质];

学科分类号：

070301 ; 081704 ;

摘要：

Bentonite produced in Xiazijie, Xinjiang (China) was characterized by X-ray diffraction (XRD), dif- ferential thermal analysis (DTA), thermogravimetric analysis (TG) and cation exchange capacity (CEC). The ben- tonite 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 decol- orization of cottonseed oil through removing carotene and chlorophyll. The bleaching capabilities of different pig- ments 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.

引用

页码：253 / 258

页数：6

共 3 条

[1]

The effect of bleaching and physical refining on color and minor components of palm oil[J] M. Rossi;M. Gianazza;C. Alamprese;F. Stanga Journal of the American Oil Chemists' Society 2001,

[2] SMECTITES - THE RELATIONSHIP BETWEEN THEIR PROPERTIES AND ISOMORPHIC SUBSTITUTION [J].

SIGUIN, D ;

FERREIRA, S ;

FROUFE, L ;

GARCIA, F .

JOURNAL OF MATERIALS SCIENCE, 1994, 29 (16) :4379-4384

[3]

β-Carotene adsorption on acid-activated montmorillonite[J] N. Sarier;Ç. Güler 1988,

← 1 →