Method for preparing novel heavy metal capture agent

A heavy metal scavenger, a new type of technology, used in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc. problem, to achieve the effect of less hydrolysis and deterioration, small temperature change range, and good reaction effect

Inactive Publication Date: 2015-04-22
苏州国昆裕重金属处理技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neutralization precipitation method with a pH regulator has the following disadvantages: after precipitation, the pH needs to be adjusted before it can be discharged; there are many kinds of heavy metals coexisting in the wastewater, and when the pH is high when containing amphoteric metals, the precipitation will be redissolved; there is complexation in the wastewater. It is difficult to remove the neutralization and precipitation; the precipitation particles are small and not easy to precipitate
There are the following disadvantages in using sulfide precipitation: the sulfide precipitation particles are small, which is not conducive to precipitation treatment; if it remains in water, it will generate toxic hydrogen sulfide gas when the pH value decreases
However, there are not many effective chelating groups on macromolecules, and the chelating ability is weak.

Method used

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  • Method for preparing novel heavy metal capture agent
  • Method for preparing novel heavy metal capture agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Mix 1000g pure water, 1g emulsifier, 200gNa 2 S (purity of 60%) was mixed, and the insolubles were filtered off to obtain Na 2 S liquid; dissolve 600g NaSH (purity of 70%) with 1000g pure water, filter out the insoluble matter, get NaSH liquid; 2 Add NaSH liquid dropwise to S, and at the same time, slowly add 500 g of cyanuric chloride (purity of 99.5%), stir, and control the temperature not to exceed 12 °C; after adding, stir for another half an hour, and heat the reactant to 70 °C Stir, keep the temperature for 3h; after the insulation, lower the mixture to room temperature, adjust the pH to 10 with NaOH, and separate the insolubles by filtration; add 15% HCl solution dropwise to the filtrate, add and stir for 2 hours, and adjust the pH to 2-3, divide the water to obtain the solid; wash the obtained solid with pure water until the effluent pH=7, and then dry the solid; weigh 100 g of the obtained solid and disperse it in 350 g of pure water, and then mix it fully wit...

Embodiment 2

[0032] Mix 900g pure water, 1.2g emulsifier, 180gNa 2 S (purity of 60%) was mixed, and the insolubles were filtered off to obtain Na 2 S liquid; dissolve 620g NaSH (purity of 70%) with 1100g pure water, filter off the insolubles, get NaSH liquid; 2 S was added dropwise with NaSH solution, and at the same time, 500 g of cyanuric chloride (purity of 99.5%) was slowly added, stirred, and the temperature was controlled not to exceed 12 °C; Stir, keep the temperature for 3h; after the insulation, lower the mixture to room temperature, adjust the pH to 10 with NaOH, and separate the insolubles by filtration; add 12% HCl solution dropwise to the filtrate, add and stir for 2 hours, and adjust the pH to 2-3, divide the water to obtain the solid; wash the obtained solid with pure water until the effluent pH=7, and then dry the solid; weigh 100 g of the obtained solid and disperse it in 350 g of pure water, and then mix it fully with 350 g of 30% NaOH solution by mass. , stir to dissol...

Embodiment 3

[0036] Mix 800g of pure water, 1.5g of emulsifier, and 160g of Na2S (purity of 60%), filter out insoluble matter to obtain Na2S solution; dissolve 640g of NaSH (purity of 70%) with 1200g of pure water, filter out insoluble matter to obtain NaSH liquid; to Na 2 Add NaSH liquid dropwise to S, and at the same time, slowly add 500 g of cyanuric chloride (purity of 99.5%), stir, and control the temperature not to exceed 12 °C; Stir and keep warm for 3 hours; after keeping warm, lower the mixture to room temperature, adjust the pH to 10 with NaOH, and separate the insolubles by filtration; add 10% HCl solution dropwise to the filtrate, and stir while adding for 2 hours to adjust the pH To 2-3, divide the water to obtain a solid; wash the obtained solid with pure water until the effluent pH=7, and then dry the solid; weigh 100 g of the obtained solid and disperse it in 350 g of pure water, and then mix it with 350 g of a 30% NaOH solution by mass, fully. Mix, stir to dissolve, filte...

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Abstract

The invention discloses a method for preparing a novel heavy metal capture agent. The method includes the following steps that I, cyanuric chloride reacts on a sulfhydrylization reagent in water solutions at the temperature of 10 DEG C-70 DEG C, and the reaction time is 1-8 h; II, the PH is adjusted to be 10, and undissolved substances are filtered out; III, hydrochloric acid is added into a product in the step II for acidification, and then a large amount of sediments are obtained; IV, the sediments obtained in the step III are separated and are cleaned by water until the cleaned water is neutral, and the obtained sediment solids are dried; V, the sediments obtained in the step IV are dispersed in water and then are mixed with sodium hydroxide liquid, and therefore the novel heavy metal capture agent is obtained. According to the method, flammable and combustible organic solvents are not used, so production operation is safe; the concept of environment protection is penetrated in the method, unlike a traditional organic reaction which needs an additionally arranged solvent recovery device, the method is relatively lower in cost, and a good reaction effect can be obtained just through selection of pure water.

Description

Technical field: [0001] The invention relates to a preparation method of a novel heavy metal scavenger, belonging to the technical field of industrial wastewater treatment. Background technique: [0002] Heavy metal wastewater from smelting, electrolysis, electroplating and other related industries is one of the most difficult industrial wastewaters to treat. Heavy metals are rich and difficult to degrade in the environment, and the pollution they produce is different from some pollution that can be purified by nature itself. Heavy metals can accumulate in the human body, causing poisoning and directly endangering human health. At present, the mining, smelting and processing of heavy metals in my country have caused serious metal pollution, and the environmental quality has deteriorated, which is increasingly intensifying. The prevention and control situation is very serious. [0003] The heavy metal content in wastewater is high and there are many types, and the existing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/38C02F1/62
CPCC07D251/38C02F1/62
Inventor 解永剑
Owner 苏州国昆裕重金属处理技术有限公司
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