کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6659024 | 1425528 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Increasing precipitation rate from sodium aluminate solution by adding active seed and ammonia
ترجمه فارسی عنوان
افزایش میزان بارش از محلول آلومینات سدیم با افزودن بذر فعال و آمونیاک
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کلمات کلیدی
بذر فعال آمونیاک محلول آلومینات سدیم، نرخ بارش، جفت یونی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Remarkably increasing precipitation rate of sodium aluminate solution was studied by adding active seed and ammonia. The fine active gibbsite seed with irregular edge, large specific area and high oil adsorption capacity was prepared by sodium bicarbonate solution and sodium aluminate. The seeded precipitation rate reached up to 65% by adding <20â¯gâ¯Lâ1 active seeds into the sodium aluminate solution. Moreover, 75% precipitation rate was obtained due to the coupling contribution from the active seed and ammonia. Ammonia added in the initial precipitation stage improved precipitation rate, whereas minimal change in precipitation rate occurred by adding ammonia in latter period of precipitation. High precipitation rate also led to precipitation of fine gibbsite. In addition, increasing ammonia amount benefitted the formation of Al(OH)4â and slightly reduced the amount of Al2O(OH)62â. Electrical conductivity in solution was decreased by adding ammonia. This is quite probably attributed to the increase in ionic pairs of Na+Al(OH)4â and subsequently precipitation of gibbsite from Al(OH)4â.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 176, March 2018, Pages 253-259
Journal: Hydrometallurgy - Volume 176, March 2018, Pages 253-259
نویسندگان
Guihua Liu, Guoyu Wu, Wei Chen, Xiaobin Li, Zhihong Peng, Qiusheng Zhou, Tiangui Qi,