Determination of the Optimum Conditions for Boric Acid Extraction with Carbon Dioxide Gas in Aqueous Media from Colemanite Containing Arsenic
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- 作者：Osman Nuri Ata ; Sabri Ç ; olak ; Mehmet Ç ; opur ; and Cafer Ç ; elik
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2000
- 出版时间：February 2000
- 年：2000
- 卷：39
- 期：2
- 页码：488 - 493
- 全文大小：72K
- 年卷期：v.39,no.2(February 2000)
- ISSN：1520-5045
文摘
The Taguchi method was used to determine optimum conditions for the boric acid extractionfrom colemanite ore containing As in aqueous media saturated by CO2 gas. After the parameterswere determined to be efficient on the extraction efficiency, the experimental series with twosteps were carried out. The chosen experimental parameters for the first series of experimentsand their ranges were as follows: (i) reaction temperature, 25-70 
C; (ii) solid-to-liquid ratio(by weight), 0.091 to 0.333; (iii) gas flow rate (in mL/min), 66.70-711; (iv) mean particle size,-100 to -10 mesh; (v) stirring speed, 200-600 rpm; (vi) reaction time, 10-90 min. The optimumconditions were found to be as follows: reaction temperature, 70 C; solid-to-liquid ratio, 0.091;gas flow rate, 711(in mL/min); particle size, -100 mesh; stirring speed, 500 rpm; reaction time,90 min. Under these optimum conditions, the boric acid extraction efficiency from the colemanitecontaining As was approximately 54%. Chosen experimental parameters for the second seriesof experiments and their ranges were as follows: (i) reaction temperature, 60-80 C; (ii) solid-to-liquid ratio (by weight), 0.1000 to 0.167; (iii) gas pressure (in atm), 1.5; 2.7; (iv) reaction time,45-120 min. The optimum conditions were found to be as follows: reaction temperature, 70 C;solid-to-liquid ratio, 0.1; gas pressure, 2.7 atm; reaction time, 120 min. Under these optimumconditions the boric acid extraction efficiency from the colemanite ore was approximately 75%.Under these optimum conditions, the boric acid extraction efficiency from calcined colemaniteore was approximately 99.55%.
C; (ii) solid-to-liquid ratio(by weight), 0.091 to 0.333; (iii) gas flow rate (in mL/min), 66.70-711; (iv) mean particle size,-100 to -10 mesh; (v) stirring speed, 200-600 rpm; (vi) reaction time, 10-90 min. The optimumconditions were found to be as follows: reaction temperature, 70 C; solid-to-liquid ratio, 0.091;gas flow rate, 711(in mL/min); particle size, -100 mesh; stirring speed, 500 rpm; reaction time,90 min. Under these optimum conditions, the boric acid extraction efficiency from the colemanitecontaining As was approximately 54%. Chosen experimental parameters for the second seriesof experiments and their ranges were as follows: (i) reaction temperature, 60-80 C; (ii) solid-to-liquid ratio (by weight), 0.1000 to 0.167; (iii) gas pressure (in atm), 1.5; 2.7; (iv) reaction time,45-120 min. The optimum conditions were found to be as follows: reaction temperature, 70 C;solid-to-liquid ratio, 0.1; gas pressure, 2.7 atm; reaction time, 120 min. Under these optimumconditions the boric acid extraction efficiency from the colemanite ore was approximately 75%.Under these optimum conditions, the boric acid extraction efficiency from calcined colemaniteore was approximately 99.55%.