Hydroxamic acid polymer flocculant capable of removing heavy metal ions in sewage

A technology of polymer flocculant and heavy metal ions, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem that the heavy metal content cannot meet the discharge standard, and improve Emission indicators, pollution reduction effects

Inactive Publication Date: 2012-02-01
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electroplating wastewater is treated by adding inorganic flocculants such as ferrous sulfate or polyferric acid and polyacrylic acid coagulant. The heavy metal content of the treated wastewater cannot meet the discharge standards stipulated by the state.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The three different structural segments of the flocculant in this example are: the first segment is acrylamide, N-18 alkyl acrylamide and methylol acrylamide; the second segment is methacrylic acid, propylene hydroxamic acid and 3-propenylpropanesulfonic acid; the third segment is butyl acrylate, 2-hydroxypropyl acrylate and hexadecyl acrylate.

[0018] Preparation: Take 125g of paraffin solvent oil (containing emulsifier Span80: 8.0g, Span85: 2.5g, PEG: 2.0g) with a boiling point of 200-380°C in a 1000ml beaker; take 102g of acrylamide, N-18 alkylacrylamide 4.0g, methylolacrylamide 6.0g, methacrylic acid 20g, acrylhydroxamic acid 28g, 3-propenylpropanesulfonic acid 1.5g, butyl acrylate 2.0g, 2-hydroxypropyl acrylate 2.0g, cetyl acrylate Put 1.0g of alkanes, 0.2g of EDTA-sodium salt, and 130g of water into a 500ml beaker, heat to dissolve fully, and then blow nitrogen. Add the aqueous solution into the oil and emulsify with a 10000-16000RPM high-speed mixer to prepare ...

Embodiment 2

[0021] The three different structural segments of the flocculant in this example are: the first segment is acrylamide, N-16 alkylacrylamide and methylol methacrylamide; the second segment is acrylic acid, methacryl hydroxime acid and 2-acrylamide-2-methylpropylsulfonic acid; the third segment is octyl acrylate, 2-methylaminopropyl acrylate and dodecyl acrylate.

[0022] Preparation: Take 125.0g of paraffin solvent oil with a boiling point of 200-380°C (including emulsifier Span80: 8.0g, Span85: 2.5g, PEG: 2.0g) in a 1000ml beaker; take 102.0g of acrylamide, N-16 alkyl Acrylamide 4.0g, methylolmethacrylamide 6.0g, acrylic acid 20.0g, methacryl hydroxamic acid 28.0g, 2-acrylamide-2-methylpropanesulfonic acid 1.5g, octyl acrylate 2.0g, acrylic acid Put 2.0g of 2-methylaminopropyl ester, 1.0g of lauryl acrylate, 0.2g of EDTA-sodium salt, and 130g of water into a 500ml beaker, heat to dissolve fully, and then pass nitrogen gas. Add the aqueous solution into the oil and emulsify wi...

Embodiment 3

[0025] The three different structural segments of the flocculant in this example are: the first segment is acrylamide, N-16 alkyl methacrylamide and methylol methacrylamide; the second segment is crotonic acid, formic acid Butene hydroxamic acid and vinylbenzene sulfonic acid; the third segment is 2 methacrylamido ethyl alcohol, 2 hydroxypropyl methacrylate and dodecyl acrylate.

[0026] Preparation: Take 125g of paraffin solvent oil (containing emulsifier Span80: 8.0g, Span85: 2.5g, PEG: 2.0g) with a boiling point of 200-380°C in a 1000ml beaker; take 102g of acrylamide, N-16 alkylmethyl Acrylamide 4.0g, methylol methacrylamide 6.0g, crotonic acid 20g, methylbutene hydroxamic acid 28g, vinylbenzenesulfonic acid 1.5g, 2-methacrylamido ethyl alcohol 2.0g, methyl 2-Hydroxypropyl acrylate, 1.0 g of lauryl acrylate, 0.2 g of EDTA-sodium salt, and 130 g of water were placed in a 500 ml beaker, heated to dissolve fully, and then nitrogen gas was passed. Add the aqueous solution int...

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Abstract

A hydroxamic acid polymer flocculant that can remove heavy metal ions in sewage, its polymer has three chain segments with different structures: the first chain segment is at least one of acrylamide and its derivatives, and the total amount of monomers is 10 -90wt%; the second segment is at least two or more of carboxylic acids, sulfonic acids and hydroxamic acid compounds, and the total amount of monomers is 5-60wt%; the third segment is sulfur-containing, oxygen-containing or At least one of amino group-containing lipid compounds, the total amount of monomers is 1-20 wt%. The flocculant can effectively remove heavy metal ions, such as iron, copper, zinc, chromium, nickel, etc., in the sewage of electroplating, electronics, and heavy metal industries, and the removal rate is above 98%.

Description

technical field [0001] The invention relates to a polymer flocculant, in particular to a hydroxamic acid polymer flocculant capable of removing divalent or more than divalent metal ions in sewage. Background technique [0002] Electroplating wastewater contains iron, zinc, copper, nickel, and chromium. It is a relatively difficult wastewater to treat. If it is not treated properly, it will pollute surface water. At present, electroplating wastewater is treated by adding inorganic flocculants such as ferrous sulfate or polyferric acid and polyacrylic acid coagulant. The heavy metal content of the treated wastewater cannot meet the national discharge standards. Contents of the invention [0003] The purpose of the present invention is to provide a hydroxamic acid polymer flocculant which is used for sewage treatment and can effectively remove heavy metal ions in sewage. [0004] The hydroxamic acid type macromolecule flocculant capable of removing heavy metal ions in sewage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F1/62
Inventor 孟勇尹笃林毛丽秋兰支利伏再辉肖毅徐琼
Owner HUNAN NORMAL UNIVERSITY
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