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Process for treating chlorinated organic compounds by polyethylene glycol and alkaline substances

A technology of chlorinated organic matter and polyethylene glycol, which is applied in the field of treatment technology, can solve the problems of long reaction time, large dosage of reaction materials, and high reaction temperature, so as to reduce the reaction temperature, realize dechlorination degradation, and increase the reaction rate and the effect of efficiency

Inactive Publication Date: 2013-02-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction reagents used in the traditional alkali-catalyzed process are paraffin oil, sodium hydroxide and the U.S.P.5019175 patent catalyst developed by BCD Corporation of the United States. This process mainly has the following problems: long reaction time, high reaction temperature, and the dosage of reaction materials Large and catalyst patents are held by foreign companies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A process for treating chlorinated organic matter using polyethylene glycol and alkaline substances, adding 0.1022 g of waste hexachlorobenzene containing chlorinated organic pollutants into a 10 mL reaction vessel, and then adding 0.6 mL of polyethylene glycol 0.7 g and alkali Add 0.3039 g of sodium hydroxide into the reactor in turn, heat the reaction material from normal temperature to 230 degrees, stir the material, and realize the dechlorination and degradation of chlorinated organic compounds after 2 hours of reaction.

[0016] In this example, it was found through testing that the dechlorination efficiency of hexachlorobenzene was greater than 99% after 2 hours of reaction, and the dechlorination efficiency of hexachlorobenzene was close to 100% after continuing the reaction for 3 hours.

Embodiment 2

[0018] A process for treating chlorinated organic matter using polyethylene glycol and alkaline substances, adding 0.1135 g of waste endosulfan containing chlorinated organic pollutants into a 10 mL reaction vessel, and then adding 0.5405 g of polyethylene glycol 200# and alkaline Substance sodium hydroxide 0.3067g was sequentially added into the reactor, the reaction material was heated from room temperature to 250 degrees, the material was stirred, and the dechlorination and degradation of chlorinated organic compounds were realized after 3 hours of reaction.

[0019] In this example, after 3 hours of reaction, the concentration of chloride ions in the system was measured by silver nitrate titration, and the dechlorination efficiency of endosulfan was close to 100%.

Embodiment 3

[0021] A process for treating chlorinated organics by using polyethylene glycol and alkaline substances. Take 20mL of polychlorinated biphenyl 1260 toluene solution with a concentration of 20000ppm and place it in a 50mL flask, add KOH and PEG400# aqueous solution to it, and throw The amount of addition is about 2g and 4g respectively (chlorinated organic matter: KOH: PEG400#=1:5:10), after stirring vigorously at 80 degrees for 4 hours, the content of polychlorinated biphenyls in the organic phase is detected by GC / ECD. at the detection limit (1ppm).

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PUM

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Abstract

The invention discloses a process for treating chlorinated organic compounds by polyethylene glycol and alkaline substances. Wastes containing chlorinated organic pollutants are added into a reactor, the polyethylene glycol and the alkaline substances are sequentially added into the reactor, and dechlorination degradation reaction can be achieved. The process has the advantages that the reaction time is short, the reaction temperature is low and the reaction materials are easy to obtain.

Description

technical field [0001] The invention relates to a process for treating chlorinated organic matter, in particular to a process for treating chlorinated organic matter by using polyethylene glycol and alkaline substances. Background technique [0002] In recent years, the harm of persistent organic pollutants (POPs, Persistent Organic Pollutions) to the human body and the environment has become the environmental focus of countries all over the world. POPs are generally toxic, including carcinogenicity, reproductive toxicity, neurotoxicity, and endocrine disrupting properties. What's more serious is that on the one hand, POPs have strong lipophilicity and hydrophobicity, and can bioaccumulate in the fat tissue of biological organs, and gradually enlarge along the food chain, so that POPs that exist in low concentrations in the atmosphere, water, and soil Pollutants are magnified through the food chain and cause serious negative effects on the health of humans at the highest tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/34A62D101/22
Inventor 蒋建国肖叶
Owner TSINGHUA UNIV
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