Dechlorination agent and preparation method thereof

A dechlorination agent and active technology, applied in the field of organic chloride dechlorination agents, can solve the problems of low cost, single activity, low content, etc., and achieve the effect of improving the dechlorination capacity

Inactive Publication Date: 2006-05-10
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The dechlorination agent provided by the present invention overcomes the defects that the active components of the known dechlorination agents are mainly alkali metals, alkaline earth metals and their compounds, with low content, single activity, and poor dechlorination effect, and has high dechlorination efficiency, Advantages of low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 7.2 g of NaOH in 370 ml of deionized water, 16.8 g of Ca(NO 3 ) 2 .4H 2 O and 5.1 g Fe(NO 3 ) 3 .9H 2 O was dissolved in 320 ml of deionized water, stirred vigorously in a water bath at 30°C, until the solution was mixed into a uniform phase, and titrated with the above-mentioned NaOH solution, the titration speed was controlled at 10 ml / min, after the precipitation was complete, the obtained precipitates were sequentially deionized Wash with ion water and absolute ethanol, put it in an oven at 120°C, dry it for 20 hours, take it out, put it in a muffle furnace, and roast it at 500°C for 8 hours to obtain the dechlorination agent of the present invention. Its composition is CaO and Ca 2 Fe 2 o 5 .

Embodiment 2

[0018] Dissolve 7.3 g of NaOH in 370 ml of deionized water, 12.7 g of Ca(NO 3 ) 2 .4H 2 O and 10.1 g Fe(NO 3 ) 3 .9H 2 O was dissolved in 320 ml of deionized water, stirred vigorously in a water bath at 100°C, until the solution was mixed into a uniform phase, and then titrated with the above-mentioned NaOH solution at a rate of 20 ml / min. Wash with ion water and absolute ethanol, put it in an oven at 50°C, dry for 48 hours, take it out, put it in a muffle furnace, and roast it at 600°C for 4 hours to obtain the dechlorination agent of the present invention. Its composition is CaO and Ca 2 Fe 2 o 5 .

Embodiment 3

[0020] Dissolve 7.5 g of NaOH in 370 ml of deionized water, 4.3 g of Ca(NO 3 ) 2 .4H 2 O and 20.3 g Fe(NO 3 ) 3 .9H 2 O was dissolved in 320 ml of deionized water, stirred vigorously in a water bath at 50°C, and the solution was mixed into a uniform phase, and then titrated with the above-mentioned NaOH solution, and the titration speed was controlled at 10 ml / min. Wash with ionized water and anhydrous methanol, put it in an oven at 120°C, dry for 20 hours, take it out, put it in a muffle furnace, and roast it at 600°C for 4 hours to obtain the dechlorination agent of the present invention. Its composition is Fe 2 o 3 with CaFe 2 o 4 .

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PUM

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Abstract

The invention provides a dechlorinating agent and it's preparing method. Said dechlorinating agent uses the nanometer ferro-calcium composite metallic oxide superfine powder as active component while its components comprises: CaO and Ca2Fe2O5, or Fe2O3 and CaFe2O4. And the mol ratio between calcium and iron atom is 6:1-1:1. The preparing method is that using NaOH, KOH or dense NH3 as titrant, to titrate the mixture of ferric iron salt and calcium salt in water-bath and 30-100Deg. C, to be completely deposited, and washing, filtering, drying and milling the deposition to be sintered at 500-900Deg. C. Said invention has high effect, lower cost and simple operation which can apply removing chlorine in variable organic chloride.

Description

technical field [0001] The invention relates to an organic chloride dechlorination agent, in particular to a nano-calcium-iron composite metal oxide superfine powder for removing chlorine in organic chlorides. [0002] The present invention also relates to a preparation method of the above-mentioned dechlorination agent. Background technique [0003] Organochlorine compounds are an important class of compounds, which are widely used in various chemical raw materials and reagents. Some of these compounds are not only highly toxic, but also difficult to degrade in the environment, posing a threat to the ecological environment and human health. It is of great significance to disinfect it. Studies have shown that dechlorination is an effective treatment. [0004] In recent years, many dechlorination technologies have been published. For example, Chinese patent 1334139 uses natural sepiolite, alkali metal and alkaline earth metal compounds as active components to dechlorinate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/70
Inventor 郑明辉马小东刘文彬张兵
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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