摘要
This paper presents a study on the chemical properties of amino-carboxylmethyl cellulose (ACMC) and the mechanisms of the reac-tion of ACMC ivith copper ions and the depression of ACMC on CuSO4-ac-tivated stibnite. The results of XPS and IR analyses show that after CMC is treated by aqueous ammonia , amino-carboxyl groups form in CMC molecules by H-bonding action ivhich can complex selectively ivith copper ions to form copper-amino-carboxylmethyl cellulose. On the surface of CuSO4-activated stibnite, ACMC is also able to complex strongly with cop-per ions and forms a strong hydrophilic depression film. Because there are the obvious difference of reactions between ACMC ivith Cu2+ and ACMC ivith Hg2+ , the separation of cinnabar from stibnite is successfully realized using ACMC as depressant and CuSO4 as activator.
This paper presents a study on the chemical properties of amino-carboxylmethyl cellulose (ACMC) and the mechanisms of the reac-tion of ACMC ivith copper ions and the depression of ACMC on CuSO4-ac-tivated stibnite. The results of XPS and IR analyses show that after CMC is treated by aqueous ammonia , amino-carboxyl groups form in CMC molecules by H-bonding action ivhich can complex selectively ivith copper ions to form copper-amino-carboxylmethyl cellulose. On the surface of CuSO4-activated stibnite, ACMC is also able to complex strongly with cop-per ions and forms a strong hydrophilic depression film. Because there are the obvious difference of reactions between ACMC ivith Cu2+ and ACMC ivith Hg2+ , the separation of cinnabar from stibnite is successfully realized using ACMC as depressant and CuSO4 as activator.
