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Method for dechloridizing organochloric compound

A compound and organochlorine technology, applied in the field of dechlorination of organochlorine compounds, can solve problems such as long-distance global migration, and achieve the effect of low reaction temperature

Inactive Publication Date: 2007-03-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Long-distance global migration is possible

Method used

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  • Method for dechloridizing organochloric compound
  • Method for dechloridizing organochloric compound
  • Method for dechloridizing organochloric compound

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Calcium oxide and iron oxide are ground, sieved and dried. Put 2mg of hexachlorobenzene, 100mg of calcium oxide and 100mg of iron oxide mixture on 1.38cm 3 Mix well in an airtight container and react at 300°C for 1 hour. The residue after the reaction was extracted with n-hexane, and the organic phase was extracted with pure water to wash away the water-soluble impurities. The obtained n-hexane solution was detected by GC / MS to analyze the organic products after the dechlorination reaction, indicating that hexachlorobenzene had been eliminated. Completely dechlorinated. After the remaining solid matter was dried, the inorganic compounds were analyzed by X-ray diffraction, which showed that the residues were CaO, Fe2 o 3 , CaCl 2 , CaCO 3 Wait.

Embodiment 2

[0028] Calcium oxide and iron oxide are ground, sieved and dried. Put 2mg of hexachlorobenzene, 100mg of calcium oxide and 100mg of iron oxide mixture on 1.38cm 3 Mix well in a closed container, and react at 300°C. The reaction times are 5 minutes, 10 minutes, 30 minutes, and 60 minutes, respectively. The residue after the reaction was extracted with n-hexane, and the organic phase was extracted with pure water to wash away the water-soluble impurities, and the obtained n-hexane solution was detected by GC / MS to analyze the organic products after the dechlorination reaction. After analysis and calculation, the dechlorination efficiencies at 5 minutes, 10 minutes, 30 minutes and 60 minutes are respectively 66.6%, 78.1%, 95.7% and 99.8%. The relationship between dechlorination efficiency and reaction time is shown in Figure 1.

Embodiment 3

[0030] Calcium oxide and iron oxide are ground, sieved and dried. Put 2mg of hexachlorobenzene, 100mg of calcium oxide and 100mg of iron oxide mixture on 1.38cm 3 Mix well in a closed container, react at 200°C and 300°C for one hour respectively, extract the residue after the reaction with n-hexane, extract the organic phase with pure water, wash away the impurities soluble in water, and obtain n-hexane solution The organic products after the dechlorination reaction were detected and analyzed by GC / MS, and the dechlorination efficiencies at 200°C and 300°C were respectively 49.1% and 99.8% through analysis and calculation. The relationship between dechlorination efficiency and reaction temperature is shown in Figure 2.

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Abstract

A process for dechlorinating the organic chlorine compound includes mixing the mixture of CaO and Fe2O3 or the composite oxide of Ca and Fe with said organic chlorine compound (hexachlorobenzene) in a sealed container, and reaction at temp higher than 200 deg.C

Description

technical field [0001] The invention relates to a method for dechlorination of organic chlorine compounds. Background technique [0002] Chlorinated organic compounds are an important class of compounds widely used in various chemical raw materials and reagents. [0003] Among the numerous organochlorine compounds, some compounds are not only highly toxic, but also difficult to degrade in the environment, posing a threat to the ecological environment and human health. Of greatest concern are the potential hazards of persistent organic pollutants that are difficult to degrade. Among them, lindane, moxa reagent, di reagent, DDT, dioxins, polychlorinated biphenyls, and hexachlorobenzene have attracted special attention. Due to their long-term persistence, bioaccumulation, semi-volatility and high toxicity, these substances have been listed as persistent organic pollutants by the Stockholm Convention. It is of great significance to disinfect it. [0004] Hexachlorobenzene ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/00A62D3/00B09B3/00B62D3/00C07B61/00C07C1/26
Inventor 郑明辉马小东刘文彬张兵赵兴茹钱永
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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