Zibo Chihao Aluminum Industry Co., Ltd.
Contact: Manager Tan
Address: Economic Development Zone, Zichuan District, Zibo City, Shandong Province
Regeneration method of high-temperature alumina
1. The performance of regenerated high temperature alumina is better than the activated alumina of new products on the market. This method uses dilute nitric acid impregnation and calcination to treat waste activated alumina, the purpose is to improve the internal pore structure of the waste activated alumina, increase the activity, and achieve the purpose of regeneration and use. Compared with other renewable methods, this treatment method has a novel process, high regenerative activated alumina activity, environmental protection and economy.
2. A method for regenerating high-temperature alumina using dilute nitric acid impregnation and calcination is to wash and dry the waste activated alumina by water, and dry the dried activated alumina in a pool, and use 8% to 20% Dilute the nitric acid solution for 5 to 25 minutes. Wash and dry the impregnated waste activated alumina with water, place it in a kiln, calcine at 500 to 800 degrees, keep it warm for 2 to 6 hours, and naturally cool to room temperature.
3. Soak the activated saturated alumina into 100g / L aluminum sulfate solution for 30 hours, discard the solution, and wash with water for 3 to 5 times, each time using 2L of water. After long-term use, the surface of the activated alumina will be yellow-brown, and the effect of removing fluorine will be reduced. This is caused by the adsorption of impurities. It can be treated with 3% hydrochloric acid once and then regenerated by the above method.
In summary, the above high-temperature alumina regeneration methods have their own advantages, which can be selected according to actual needs, but you must pay attention not to throw them away after use, not only wasting raw materials, but also cause certain dangers, and you should operate carefully. be careful.