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Preparation method of chromium removal composite ion sieve

A technology of composite ions and chromium ions, applied in chemical instruments and methods, silicon compounds, silicates, etc., can solve problems such as high technical requirements, complex processes, secondary pollution, etc., and achieve strong chemical stability and large adsorption capacity , the effect of reducing toxicity

Active Publication Date: 2014-04-09
SHENZHEN HUASHUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a chromium-removing composite ion sieve, to prepare an efficient and environmentally friendly chromium-removing composite ion sieve, and to overcome the high technical requirements, complicated process, High cost and secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the chromium-removing composite ion sieve of the present invention is as follows:

[0025] 1. Disperse the Na-montmorillonite in deionized water, stir and let stand to obtain a Na-montmorillonite suspension. Under stirring conditions, drop the prepared titanium column liquid into the montmorillonite suspension, stir and mix thoroughly, pour it into a polytetrafluoroethylene-lined autoclave, seal it and put it in an oven for aging treatment, the temperature It is 100 ℃, and the time is 6h. After the aging is completed, cool naturally, separate the solid from the liquid, wash the solid to neutral, dry naturally, and grind to obtain the chromium ion removal sieve base. Among them, the titanium column solution is prepared by the following method: prepare a hydrochloric acid solution with a concentration of 3-5 mol / L, put it into a three-necked bottle, slowly add titanium tetrachloride to the hydrochloric acid solution in a fume hood and an ice bat...

Embodiment 2

[0036] The preparation method of the chromium-removing composite ion sieve of the present invention is as follows:

[0037] 1. Disperse the sodium-montmorillonite in deionized water, stir and let stand to obtain a suspension of sodium-montmorillonite. Under stirring conditions, put the prepared titanium column droplets into the montmorillonite suspension, fully stir and mix, pour into a polytetrafluoroethylene-lined autoclave, seal it and put it in an oven for aging treatment, the temperature It is 120°C and the time is 8h. After the aging is completed, cool naturally, separate the solid from the liquid, wash the solid to neutral, dry naturally, and grind to obtain the chromium ion removal sieve base.

[0038] 2. Immerse the chromium ion-removing sieve substrate in 0.18mol / L chromium solution for 26 hours to obtain an unretained titanium pillared montmorillonite (chromium ion) composite.

[0039] 3. Bake the titanium-pillared montmorillonite (chromium ion) composite at 300°C...

Embodiment 3

[0044] The preparation method of the chromium-removing composite ion sieve of the present invention is as follows:

[0045] 1. Disperse the Na-montmorillonite in deionized water, stir and let stand to obtain a Na-montmorillonite suspension. Under stirring conditions, put the prepared titanium column droplets into montmorillonite suspension, fully stir and mix, pour into an autoclave lined with polytetrafluoroethylene, seal it and put it in an oven for aging treatment, the temperature It is 80 ℃, and the time is 4h. After the aging is completed, cool naturally, separate the solid from the liquid, wash the solid to neutral, dry naturally, and grind to obtain the chromium ion removal sieve base.

[0046] 2. Immerse the chromium ion-removing sieve substrate in 0.20mol / L chromium solution for 24 hours to obtain an unretained titanium pillared montmorillonite (chromium ion) composite.

[0047] 3. Bake the titanium pillared montmorillonite (chromium ion) composite at 450°C for 6 ho...

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Abstract

The invention discloses a preparation method of a chromium removal composite ion sieve. The preparation method comprises the following steps: preparing a chromium removal ion sieve; screening and mixing 35-50wt% of the chromium removal ion sieve, 5-10wt% of magnesium powder, 10-20wt% of polyethylene powder and 10-15wt% of a gas generation agent, uniformly mixing, naturally drying, milling to fine powder, and sieving; preparing mixed balls from the resultant sieved mixed powder, coating the mixed balls with 10-15wt% of diatomite powder through using 10-15wt% of a silicone vinyl acetate-ethylene-polyvinyl alcohol polymer blend, and drying the obtained coated mixed ball blanks to obtain the chromium removal composite ion sieve. The chromium removal composite ion sieve has an efficient sieving effect and an efficient bonding capability, can efficiently capture chromium ions, has a large adsorption capacity to chromium ions, can strongly eliminate sexavalent chromium, has a strong pollution resistance, and has the advantages of high selectivity, concentrated eluting peaks, strong chemical stability, no regeneration pollution, low cost, simple use technology and the like.

Description

technical field [0001] The invention relates to a preparation method of a chromium-removing composite ion sieve, which comprises uniformly mixing chromium-removing ion sieve, magnesium powder, polyethylene powder and a pore-forming agent to make balls, and then blending and polymerizing with silicon vinyl acetate-ethylene-polyvinyl alcohol The process of evenly bonding diatomaceous earth to the surface of the mixing ball. Background technique [0002] With the rapid development of my country's social economy, chromium has been widely used in many industries. At the same time, with the widespread use of chromium, the problem of chromium pollution has become more and more serious. At present, about 200,000 to 300,000 tons of chromium-containing waste residue is produced in the domestic industrial production process every year. The existence forms of chromium include metallic chromium, trivalent chromium, and hexavalent chromium. Among them, the toxicity of metallic chromium a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/16
Inventor 王林双
Owner SHENZHEN HUASHUI ENVIRONMENTAL PROTECTION TECH
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