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Selective sticking agents for halogenated aromatic compounds contained in media and method for selective sticking

An aromatic and selective technology, applied in chemical instruments and methods, lubricating compositions, other chemical processes, etc., can solve problems that are difficult to apply to organic media

Active Publication Date: 2009-08-12
OSAKA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method described in JP-A-5-31212 relates to a method for trapping organic halides contained in an aqueous solution using the above-mentioned modified cyclodextrin which is hydrophilic, and uses the above-mentioned non-lipophilic modified cyclodextrin , so it is difficult to apply intact to organic media

Method used

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  • Selective sticking agents for halogenated aromatic compounds contained in media and method for selective sticking
  • Selective sticking agents for halogenated aromatic compounds contained in media and method for selective sticking
  • Selective sticking agents for halogenated aromatic compounds contained in media and method for selective sticking

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0057] Synthesis of tert-Butyldimethylsilyl Modified-β-Cyclodextrin (TBDMS-β-CD)

[0058] Add β-cyclodextrin (5.0 g, 4.4 mmol, Wako Pure Chemical Industry) and dry pyridine (44 ml, Wako Pure Chemical Industries). After the three-necked flask was placed in a water bath, tert-butyldimethylsilyl chloride (hereinafter referred to as TBDMSCl, 6.03g, 40mmol, Tokyo Chemical Industry Co., Ltd.) dissolved in dry pyridine (26ml) was added dropwise thereto. Add time is 2 hours. After the dropwise addition was completed, the water bath was removed, and the mixture was stirred at room temperature for 11 hours. After the reaction, the reaction solution was poured into 200ml of water, and the precipitated white crystals were collected by filtration. The white crystals were dissolved in dichloromethane and washed with water. The dichloromethane layer was dried over anhydrous sodium sulfate, and then, the solvent was distilled off. The obtained white crystals were purified using a silica ...

Embodiment 1

[0060] Selective immobilization of trichlorobenzene contained in organic media

[0061] The TBDMS-β-CD (18 mg) synthesized in Synthesis Example 1 above was put into a 3 mL sample tube. Insulating oil containing 90 ppm of 1,2,4-trichlorobenzene (hereinafter referred to as "TCB", Tokyo Chemical Industry Co., Ltd.) (Taniguchi Petrochemical Co., Ltd., total 243 mg including TCB) was put into the sample tube. The sample tube was placed in a shaker with the water temperature set at 25° C., and shaken for 15 hours. Subsequently, the above-mentioned shaken solution was poured into a simple separator, and the solution was separated by pressing the syringe to obtain 167 mg of insulating oil. Here, the simple separator is made by inserting absorbent cotton at the top of the syringe. The TCB concentration in the insulating oil obtained was measured by the internal standard method (internal standard substance: 2-chlorotoluene) using a GC-2010 (Shimadzu Corporation) apparatus, and the pre...

Embodiment 2

[0063] Selective immobilization of 1,4-dichlorobenzene contained in organic media

[0064] The operation of Example 1 was repeated except that 1,4-dichlorobenzene (hereinafter referred to as "DCB", Wako Pure Chemical Industries, Ltd.) was used instead of TCB in Example 1 above. 175 mg of insulating oil was obtained. The DCB concentration in the insulating oil obtained was measured by gas chromatography, and the presence of DCB was not detected.

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PUM

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Abstract

The aim of the invention is to provide a selective sticking agent which eliminates or condenses the aromatic halide in organic medium through selectively sticking the trace aromatic halide contained in organic media thereby realizing the simple decomposition to the aromatic halide. The selective sticking agent related with the invention comprises the following a composition which comprises the compounds with suctional interaction with the aromatic halide. The composition is selected from the following compositions: cyclic compound, dimmer of the cyclic compound, non-cyclic compound, and the mixture of more than two cyclic compounds and / or the non-cyclic compounds, wherein, the cyclic compound is selected from the following compounds: specific modified cyclodextrin and other cyclic oligosaccharide, supramolecular assembly of cyclodextrin, crown compound, aromatic hydrocarbon, N-heterocyclic aromatic hydrocarbon, subsulfite aromatic hydrocarbon, cryptate, thiocyclophane, cavity organic compound, calixarene, thiocyclophane, spherand, cavitand and cyclic oligopeptide. The non-cyclic compound is selected from non-cyclic oligose and non-cyclic oligopeptide.

Description

technical field [0001] The present invention relates to a selective fixing agent capable of trapping aromatic halides contained in an organic medium, and a method for selectively trapping aromatic halides using the selective fixing agent. Wherein, the organic medium is represented by insulating oil, engine oil, heat transfer oil, lubricating oil, plasticizer, paint and ink, and the mixture of the above-mentioned medium. Background technique [0002] Aromatic halides are a class of compounds that are highly toxic to humans, animals and plants. In particular, they have the risk of teratogenicity. Therefore, most aromatic halides are designated as hazardous substances by relevant waste disposal and cleaning laws . And there are strict regulations: when such compounds exist in soil, groundwater, incineration ash, cleaning water, engine oil, etc., they must be treated to reduce their concentration below the reference value. [0003] Traditional chemical treatment methods have b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00B01J20/26B01J20/24A62D3/33
CPCB01J20/26B01J20/22B01J20/24C08B37/0012C10G25/006C10G2300/1062B01J20/3242C10M175/0008C09K3/00
Inventor 明石满木田敏之加藤荣一宫胁和博
Owner OSAKA UNIV