Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay
The rapid development of the global alumina industry has led to a considerable increase in the production alumina and processing of alumina from non-bauxitic sources. Lampang clays comprise various minerals that contain about 22.70 wt% of extractable alumina. Local clay was ground, activated by calc...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/758296 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832568069243797504 |
|---|---|
| author | Paweena Numluk Aphiruk Chaisena |
| author_facet | Paweena Numluk Aphiruk Chaisena |
| author_sort | Paweena Numluk |
| collection | DOAJ |
| description | The rapid development of the global alumina industry has led to a considerable increase in the production alumina and processing of alumina from non-bauxitic sources. Lampang clays comprise various minerals that contain about 22.70 wt% of extractable alumina. Local clay was ground, activated by calcination and treated with sulfuric acid to extract alumina. In the activation step, the effects of temperature and time on the extraction of alumina and iron were investigated. The leaching experiments were performed on clay samples with particle sizes less than 200 mesh. The samples were calcined at different temperatures, ranging from 450°C to 1050°C, and for different periods, ranging from 30 to 150 min. The optimum conditions for the extraction of alumina from Lampang clay include grinding the clay to pass through a 200 mesh sieve, calcining the ground clay at 750°C for 30 min, extracting the alumina from the calcined clay by leaching with 3M sulfuric acid, and using an acid to clay ratio of 80 wt% at 100°C for 120 min. An aluminum dissolution efficiency of 95.1 % was achieved under the conditions that resulted in the maximum dissolution efficiency of iron (26.6 %). |
| format | Article |
| id | doaj-art-4898b1d581364dd3ad237eee7cde3eec |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-4898b1d581364dd3ad237eee7cde3eec2025-02-03T00:59:48ZengWileyE-Journal of Chemistry0973-49452090-98102012-01-01931364137210.1155/2012/758296Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang ClayPaweena Numluk0Aphiruk Chaisena1Department of Applied Chemistry and Center for Innovation in Chemistry, Faculty of Science, Lampang Rajabhat University, Lampang, 52100, ThailandDepartment of Applied Chemistry and Center for Innovation in Chemistry, Faculty of Science, Lampang Rajabhat University, Lampang, 52100, ThailandThe rapid development of the global alumina industry has led to a considerable increase in the production alumina and processing of alumina from non-bauxitic sources. Lampang clays comprise various minerals that contain about 22.70 wt% of extractable alumina. Local clay was ground, activated by calcination and treated with sulfuric acid to extract alumina. In the activation step, the effects of temperature and time on the extraction of alumina and iron were investigated. The leaching experiments were performed on clay samples with particle sizes less than 200 mesh. The samples were calcined at different temperatures, ranging from 450°C to 1050°C, and for different periods, ranging from 30 to 150 min. The optimum conditions for the extraction of alumina from Lampang clay include grinding the clay to pass through a 200 mesh sieve, calcining the ground clay at 750°C for 30 min, extracting the alumina from the calcined clay by leaching with 3M sulfuric acid, and using an acid to clay ratio of 80 wt% at 100°C for 120 min. An aluminum dissolution efficiency of 95.1 % was achieved under the conditions that resulted in the maximum dissolution efficiency of iron (26.6 %).http://dx.doi.org/10.1155/2012/758296 |
| spellingShingle | Paweena Numluk Aphiruk Chaisena Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay E-Journal of Chemistry |
| title | Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay |
| title_full | Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay |
| title_fullStr | Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay |
| title_full_unstemmed | Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay |
| title_short | Sulfuric Acid and Ammonium Sulfate Leaching of Alumina from Lampang Clay |
| title_sort | sulfuric acid and ammonium sulfate leaching of alumina from lampang clay |
| url | http://dx.doi.org/10.1155/2012/758296 |
| work_keys_str_mv | AT paweenanumluk sulfuricacidandammoniumsulfateleachingofaluminafromlampangclay AT aphirukchaisena sulfuricacidandammoniumsulfateleachingofaluminafromlampangclay |