MISC

査読有り 国際誌
2014年8月

PCB CONGENER PROFILE OF UNINTENTIONAL FORMATION FROM PIGMENT MANUFACTURING PROCESS

Organohalogen Compounds
  • Takeshi Nakano
  • ,
  • Katsunori Anezaki

76
開始ページ
110
終了ページ
113
記述言語
英語
掲載種別
記事・総説・解説・論説等(国際会議プロシーディングズ)
出版者・発行元
International Symposium on Halogenated Persistent Organic Pollutants

A report from Japan Dyestuff and Industrial Chemicals Association (JDICA) revealed that some organic pigments contained a trace amount of polychlorinated biphenyl (PCB) unintentionally formed in the manufacturing process. In response to the report, the Ministry of Economy, Trade and Industry (METI) decided performing the survey immediately the current situation. As an urgent measure for the time being, METI instructed manufacturer to stop manufacture, import and shipment, if organic pigments contained PCBs more than international guideline. (Pigment : Generic term for water-insoluble or oil-insoluble powder used for coloring. Organic pigments are those comprising organic compounds.)
Regarding PCB in organic pigments, Uyeta et al. have pointed out that phthalocyanine related pigment may contain in PCB in 1976. Although PCB was not detected in the starting materials themselves for pigment manufacture, such as urea, phthalic anhydride, copper chloride, ammonium molybdate and trichlorobenzene, PCB was detected in the pigments of a manufacturing process using trichlorobenzene as a reaction solvent. PCB in the pigment increased with the increase in amount of copper-phthalocyanine-blue manufacture. Authors also reported that PCB is not detected when a hydrocarbon solvent like isopropyl xylene was used as a reaction solvent. Regarding precursor and PCB formation mechanism during the phthalocyanine pigment production, pigments manufactured using trichlorobenzene contains PCBs, PCB-209 contains in the phthalocyanine green formed from perchlorinated process of phthalocyanine-blue1. Authors pointed out that manufacturer should take appropriate measures to reduce PCBs in the product of pigment manufacture using the appropriate manufacturing techniques of the phthalocyanine pigment to establish the regulatory guidelines, reducing PCB level.
We have reported PCBs level and profile as unintentional formation product of the organic pigments such as a commercial azo pigment, phthalocyanine pigment. We have presented about the PCB congener-specific profile in pigments, and the reaction mechanism expected from pigment manufacturing process.

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http://dioxin20xx.org/wp-content/uploads/pdfs/2014/614.pdf

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