1. Recycling of cobalt-nickel catalyst (alkali dip method) Na 2 CO 3 was added to the waste containing desulfurization catalyst of Al 2 O 3. The molar ratio of Na 2 CO 3 ∕Al 2 O 3 is 1.5 to 4, calcined to above 1150 ° C, and the calcined product is immersed in hot water and stirred into H 2 SO 4 of ≥0.1 mol ∕L, thereby releasing nickel. Come with cobalt . Second, the recycling of cobalt aluminum catalyst (alkali melting method) 61% of the Co 3 O 4 ∕AI 3 O 3 spent catalyst was added with 3.5% soda ash, and melted at 1100 ° C. The frit was crushed and immersed in 10 times of water at 80-90 ° C for 1 h. the filter cake containing 95.8% Co 3 O 4, and dried to further principles of cobalt metal, the yield of more than 95% of cobalt, cobalt-containing filtrate 0.6mg. Dongguan OK Silicone Gift Co., Ltd. , https://www.dgsiliconebabyproducts.com
Recycling of cobalt-nickel catalyst and cobalt-aluminum catalyst