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A heavy metal ion remover with self-flocculation function and its synthesis method

A technology of heavy metal ions and self-flocculation, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of increased treatment cost and difficulty of treatment process, high heavy metal content, inability to Achieve the effect of good self-flocculation function, large molecular weight and good applicability

Active Publication Date: 2021-02-09
BEIJING CENT FOR PHYSICAL & CHEM ANALYSIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For such complex heavy metal ion wastewater, the traditional chemical neutralization precipitation method is difficult to effectively remove, and the heavy metal content in the discharged water is still high
Especially for heavy metals in a complex state, the removal efficiency is extremely low, and even the emission cannot meet the standard, which has brought great harm to the environment.
[0003] In addition, heavy metal removal agents that have been studied more at present, such as dithiocarbamate, xanthate, etc., still have problems such as small flocs after treatment, large amount of sludge, and poor sedimentation effect. It is usually necessary to add flocculant or coagulant aid, which not only increases the treatment cost and difficulty of the treatment process, but also easily produces secondary pollution

Method used

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  • A heavy metal ion remover with self-flocculation function and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step (1): Add 180g of sodium hydroxide aqueous solution (mass concentration: 3wt.%) to a three-necked flask with magnetic stirring, heat up to 45°C, then add 3g of soluble starch, after stirring evenly, slowly add 25g of epoxy Chloropropane, the system was slowly raised to 55°C and stirred for 8 hours. After the reaction was completed, it was cooled to room temperature, filtered, washed with distilled water, ethanol, and acetone in sequence, and vacuum-dried to obtain the target product AP1.

[0028] Step (2): Add 90g of sodium hydroxide aqueous solution (mass concentration is 0.5wt.%) to the three-necked flask with magnetic stirring, heat up to 60°C, then add 3g of the product AP1 synthesized in step (1), and stir evenly , slowly drop 9g of diethylenetriamine, and the system was stirred and reacted at 60-70°C for 4 hours. After the reaction was completed, it was cooled to room temperature, filtered, washed with distilled water, ethanol, and acetone in sequence, and va...

Embodiment 2

[0033] Step (1): Add 200g of sodium hydroxide aqueous solution (mass concentration: 2wt.%) to a three-necked flask with magnetic stirring, heat up to 55°C, then add 3g of soluble starch, after stirring evenly, slowly add 30g of epoxy Chloropropane, the system was slowly raised to 60°C and stirred for 6 hours. After the reaction was completed, it was cooled to room temperature, filtered, washed with distilled water, ethanol, and acetone in turn, and vacuum-dried to obtain the stage target product BP1.

[0034] Step (2): Add 120g of sodium hydroxide aqueous solution (mass concentration is 1.5wt.%) to the there-necked flask with magnetic stirring, heat up to 65°C, then add 3g of the product BP1 synthesized in step (1), and stir evenly 12 g of triethylenetetramine was slowly added dropwise, and the system was stirred and reacted at 70° C. for 6 hours. After the reaction was completed, it was cooled to room temperature, filtered, washed with distilled water, ethanol, and acetone i...

Embodiment 3

[0039] Step (1): Add 240g of sodium hydroxide aqueous solution (mass concentration is 4wt.%) to the three-necked flask with magnetic stirring, heat up to 55°C, then add 3g of soluble starch, after stirring evenly, slowly add 40g of epoxy Chloropropane, the system was slowly raised to 70°C and stirred for 12 hours. After the reaction was completed, it was cooled to room temperature, filtered, washed with distilled water, ethanol, and acetone in sequence, and vacuum-dried to obtain the stage target product CP1.

[0040] Step (2): Add 150g potassium hydroxide aqueous solution (mass concentration is 2wt.%) to the there-necked flask with magnetic stirring, heat up to 65°C, then add 3g of the product CP1 synthesized in step (1), after stirring evenly, 15 g of tetraethylenepentamine was slowly added dropwise, and the system was stirred and reacted at 75-80° C. for 8 hours. After the reaction was completed, it was cooled to room temperature, filtered, washed with distilled water, eth...

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Abstract

The invention discloses a heavy metal ion remover with self-flocculation function, which uses starch—(C 6 h 10 o 5 ) n —The structure is the main body of the molecular chain, and its active hydroxyl group is grafted with epichlorohydrin and linear polyamines with cationic groups—N(CH 3 ) 3 + , wherein the amine group is connected with a functional group—CSS ‑ . The present invention further relates to the synthesis method and application of the heavy metal ion remover with self-flocculation function. The heavy metal ion remover of the present invention realizes high-efficiency chelation adsorption and self-flocculation sedimentation of heavy metal ions, and greatly improves the effective removal of complex heavy metal ion wastewater without adding additional flocculants or coagulants, and can be effectively applied It is used in the treatment of various complex heavy metal ion wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to the treatment of industrial wastewater containing heavy metal ions. Specifically, the invention relates to a heavy metal ion remover with self-flocculation function, and further relates to its synthesis method and application. Background technique [0002] With the rapid development of industries such as electronics, electroplating, and printing and dyeing, the discharge of heavy metal ion wastewater, as an inevitable derivative product, is on the rise rapidly, and the difficulty of treatment is increasing. At present, it has become a bottleneck problem that the industry needs to solve urgently. There are many types of heavy metals in heavy metal ion wastewater and their content is high, usually containing heavy metal ions such as copper, zinc, manganese, cadmium, lead, nickel, zinc, etc., and wastewater often contains complexing agents that can combin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/52C02F101/20
CPCC02F1/00C02F1/5263C02F2101/20
Inventor 张梅刘伟丽高峡胡光辉李琴梅赵婷
Owner BEIJING CENT FOR PHYSICAL & CHEM ANALYSIS
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