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Heavy-metal macromolecule capture agent and preparation method and application thereof

A heavy metal and polymer technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as high water solubility, achieve strong affinity, high capture capacity, and effective adsorption Effect

Inactive Publication Date: 2016-03-23
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on polyhydroxamic acids. Polyhydroxamic acid has high water solubility, good complexation effect with heavy metal ions, stable complexation products, and great development prospects in the adsorption of metal ions.

Method used

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  • Heavy-metal macromolecule capture agent and preparation method and application thereof
  • Heavy-metal macromolecule capture agent and preparation method and application thereof
  • Heavy-metal macromolecule capture agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 12

[0044] The preparation of embodiment 12-carboxypolyvinyl benzoate

[0045] Table 1 PVA and phthalic anhydride esterification reaction each material consumption

[0046]

[0047]According to the various dosages in Table 1, first put PVA into a 250mL dry round bottom flask, add 50mL DMF, shake well, put in a stirrer, start stirring and program the temperature to 140°C (about 1h), until the polyvinyl alcohol is completely After dissolving (about 1.5h), the temperature was lowered to 100°C (about 0.5h). At this time, the reaction solution was colorless and transparent. Then, the phthalic anhydride dissolved in 50mL DMF was added dropwise to the reaction flask, and the drop was completed within 2 minutes, and a small amount of white smoke came out during the dropwise addition. Maintain the reaction temperature at 100±2°C, react for 5 hours, then pour 1 / 4 of the reaction solution into about 150mL of dichloromethane under stirring to precipitate while it is hot, pour out the solu...

Embodiment 2

[0051] Embodiment 2 Preparation of Phthalyl Hydroxamic Acid Modified Polyvinyl Alcohol

[0052] The molar ratio of each reactant used in the oximation reaction of table 2

[0053]

[0054] Get the liquid 2-carboxypolyvinylbenzoate prepared in Example 1, add 1.106g melamine, 1.78mLN-methylmorpholine, and 0.245g of 4-dimethylaminopyridine as a catalyst according to the material ratio described in Table 2, 1.529g Hydroxylamine hydrochloride, keep stirring at room temperature for 12 hours until the carboxylic acid is completely converted, then add hydrochloric acid to adjust the pH to 5-6, stir for 5 minutes to terminate the reaction, and the reaction solution changes from milky white to light yellow transparent liquid. Then the reaction flask was transferred to a rotary evaporator at 90°C for about 1.5 hours to distill off impurities such as solvents, and the remaining product was precipitated with ethyl acetate precipitant, then suction filtered and dried. The obtained produ...

Embodiment 3

[0058] Embodiment 3 heavy metal ion flocculation experiment

[0059] This experiment mainly studied the flocculation effect of polyvinyl alcohol modified phthalyl hydroxamic acid on heavy metal ions. Select four common heavy metal ions Cu 2+ 、Cr 6+ , Pb 2+ , Mn 2+ As a representative, the flocculation effect of polyhydroxamic acid on heavy metal ion wastewater was studied, and the influence of factors such as flocculation time, temperature, metal ion concentration, flocculant dosage and material ratio on the flocculation effect were analyzed, and the optimal flocculation conditions were found. Then, under the condition of constant metal ion concentration, the flocculation activity of the first step reaction esterification product and flocculant was compared, and the relationship between the material ratio of flocculant synthesis and the flocculation activity and selectivity was explored.

[0060] First prepare 100mg / L of CuCl 2 、K 2 Cr 2 o 7 , PbNO 3 and MnSO 4 Maste...

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Abstract

The invention discloses a heavy-metal macromolecule capture agent and a preparation method and application thereof. The heavy-metal macromolecule capture agent is polyvinyl alcohol modified by phthalahydroxamic acid; the polyvinyl alcohol modified by the phthalahydroxamic acid is modified hydroxamic acid type macromolecule polymer, the polyvinyl alcohol and heavy-metal ions can be quickly chelated into stable chelate, high adsorption capacity to the heavy-metal ions is achieved, the heavy-metal macromolecule capture agent can be used for treatment of heavy-metal pollution, and compared with a common traditional metal ion capture agent, the heavy-metal macromolecule capture agent can adsorb fine particles in sewage more effectively, has selective adsorption capacity and has quite good application prospect on the aspect of heavy metal ion sediment and separation; besides, the heavy-metal macromolecule capture agent can be further used for ore floatation, and high capture capacity is achieved for oxides of oxidized ores such as cassiterite, wolframite, cerusite and chrysocolla; besides, the heavy-metal macromolecule capture agent can be further widely applied to the fields of oilfield drilling, separation of red mud produced by aluminium oxide and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a heavy metal polymer collector and its preparation method and application. Background technique [0002] Heavy metal pollution in the environment is a major problem. Heavy metal pollution has been involved in people's daily life. It is imminent to solve the problem of heavy metal pollution. Existing methods to deal with heavy metal pollution include activated carbon adsorption method, chitosan method, fly ash and zeolite adsorption method, microbial method, electric adsorption method, separation technology, coagulation sedimentation method, membrane bioreactor method, polymer Heavy metal capture method, etc. [0003] Among them, polymer heavy metal collectors are widely used. For example, polyacrylamide uses the mechanism of adsorption and bridging to flocculate suspended colloidal particles. At the same time, it can also react with negatively charged dis...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/281B01J20/30C02F1/28C02F1/62
CPCB01J20/22B01J20/261B01J20/281B01J20/30B01J2220/48C02F1/285C02F1/62
Inventor 魏星跃李宁王星敏
Owner CHONGQING TECH & BUSINESS UNIV
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