Recycling of cobalt-nickel catalyst and cobalt-aluminum catalyst

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.

Non-Toxic PVC Ca/Zn Stabilizer

Calcium and zinc stabilizers are mainly white in appearance in powder, flakes and paste form. Powdered calcium-zinc stabilizer is used as the most widely used non-toxic PVC stabilizer, commonly used in food packaging, medical devices, wire and cable materials, etc.. At present, there are already PVC calcium-zinc stabilizers that can be used for rigid pipes in China.