Ultrafast settlement type composite heavy metal capturing agent, and production method and application thereof
A heavy metal scavenger, composite technology, applied in chemical instruments and methods, metallurgical wastewater treatment, flocculation/sedimentation water/sewage treatment, etc. , to solve the technical problems of difficult control of sedimentation rate, reduce the cost of use, and solve the effect of processing problems
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Embodiment 1
[0028] It is an ultra-fast sedimentation composite heavy metal scavenger, which is prepared by the following steps:
[0029] Step 1 Synthesis of PHAM polymer backbone
[0030] Take 1 part of azobisisobutyronitrile initiator, 200 parts of methylolacrylamide (HAM), and 100 parts of methanol, and carry out polymerization reaction at 85°C for 3 hours under the protection of nitrogen to obtain a degree of polymerization (DP) of 170 Polymethylolacrylamide (PHAM);
[0031] Step 2 Functional polymer side chain precursor polymer PNVF-COOH
[0032] Synthesis of functional polymer side chain precursor polymer PNVF-COOH: Take 1 part of azodicyanovaleric acid initiator, 300 parts of N-vinylformamide (NVF) and 200 parts of water, under nitrogen protection Free radical polymerization was carried out at 55°C for 3 hours to obtain a functional polymer side chain precursor polymer PNVF-COOH with a degree of polymerization (DP) of 60;
[0033] Step 3 Synthesis of 1,2-cyclohexanediaminetetraacet...
Embodiment 2
[0043] It is an ultra-fast sedimentation composite heavy metal scavenger, which is prepared by the following steps:
[0044] Step 1 Synthesis of PHAM polymer backbone
[0045] Take 1 part of azobisisobutyronitrile initiator, 400 parts of methylolacrylamide (HAM), and 100 parts of methanol, and carry out polymerization reaction at 70°C for 5 hours under the protection of nitrogen to obtain a degree of polymerization (DP) of 450 Polymethylolacrylamide (PHAM);
[0046] Step 2 Functional polymer side chain precursor polymer PNVF-COOH
[0047] Take 1 part of azodicyanovaleric acid initiator, 300 parts of N-vinylformamide (NVF) and 50 parts of water, and carry out free radical polymerization at 65°C for 3 hours under the protection of nitrogen to obtain the degree of polymerization ( DP) is 150 functional polymer side chain precursor polymer PNVF-COOH;
[0048] Step 3 Synthesis of 1,2-cyclohexanediaminetetraacetic dianhydride (CDTAD)
[0049] Dissolve 60 parts of 1,2-cyclohexane...
Embodiment 3
[0058] It is an ultra-fast sedimentation composite heavy metal scavenger, which is prepared by the following steps:
[0059] Step 1 Synthesis of PHAM polymer backbone
[0060] Take 1 part of azobisisobutyronitrile initiator, 600 parts of methylolacrylamide (HAM), and 20 parts of methanol, and carry out polymerization reaction at 75°C for 15 hours under the protection of nitrogen to obtain a degree of polymerization (DP) of 940 Polymethylolacrylamide (PHAM);
[0061] Step 2 Functional polymer side chain precursor polymer PNVF-COOH
[0062] Take 1 part of azodicyanovaleric acid initiator, 300 parts of N-vinylformamide (NVF) and 100 parts of water, and carry out free radical polymerization at 75°C under nitrogen protection for 6 hours to obtain the degree of polymerization ( PNVF-COOH with a DP of 195;
[0063] Step 3 Synthesis of 1,2-cyclohexanediaminetetraacetic dianhydride (CDTAD)
[0064] Dissolve 80 parts of 1,2-cyclohexanediamine tetraacetic acid and 80 parts of acetic ...
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