Oxidation of 2,6-di-tert-butylphenol with tert-butyl hydroperoxide catalyzed by iron porphyrin tetrasulfonate, iron porphyrin tetracarboxylate and their supported analogues in a water-methanol mixture

Mutlu Y. C., Semerci T. G., Turk H.

JOURNAL OF HAZARDOUS MATERIALS, cilt.371, ss.280-287, 2019 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 371
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.jhazmat.2019.03.001
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.280-287
  • Anahtar Kelimeler: Catalyst, Oxidation, Porphyrin, 2,6-Di-tert-butylphenol, Ecotoxicity, LIQUID-PHASE OXIDATION, HYDROGEN-PEROXIDE, PHTHALOCYANINE TETRASULFONATE, PHOTOCATALYTIC DEGRADATION, SELECTIVE OXIDATION, SODIUM PERIODATE, PHENOL, TOXICITY, PEROXOMONOSULFATE, EFFICIENT
  • Anadolu Üniversitesi Adresli: Hayır

Özet

In this study, two water-soluble iron porphyrins bearing sulfonate and carboxylate functionalities (FePTS and FePTC, respectively) and their supported analogues were used as catalysts for the oxidation of 2,6-di-tert-butylphenol (DTBP) in a water-methanol mixture. tert-Butyl hydroperoxide (TBHP) was the oxidant and the volume ratio of water to methanol in the mixture was 1-8. The major products of the DTBP oxidation were 3,3'5,5'-tetra-tert-butyl-4,4'-diphenoquinone (DPQ) and 4,4'-dihydroxy-3,3',5,5'-tetra-tert-butylbiphenyl (H(2)DPQ). Also 2,6-di-test-butyl-1,4-benzoquinone (BQ) was the minor product of the oxidation. The results showed that FePTC was more catalytically active than FePTS in the oxidation and gave the highest TON and TOF values in comparison to those for metalloporphyrin and metallophthalocyanine based catalysts in the DTBP oxidation given in the literature. In addition, the ecotoxicity tests of the DTBP oxidation mixtures before and after oxidative catalytic treatment toward Anemia sauna were performed. It was found that the toxicity of the catalytically treated DTBP mixture containing residual DTBP and products was lower than the catalytically untreated DTBP mixture.