Selective absorption of isoprene from C5 mixtures by π complexation with Cu()

Seung J. Son, Hyun W. Choi, Dae K. Choi, Sang D. Lee, Hoon S. Kim, Seung Wook Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Selective absorption of isoprene from n-pentane mixtures was performed via reversible π complexation with an aqueous solution of copper(I) nitrate, which was prepared by the disproportionation reaction between copper powder and cupric nitrate trihydrate [Cu(NO3)2 3H2O] in H2O in the presence of pyridine and nitric acid as stabilizers. The absorption of isoprene by the Cu(I) solution increased with an increase in the molar ratio of isoprene/Cu(I) up to 1 and remained nearly constant thereafter. The maximum isoprene pickup achieved at the molar ratio of isoprene/Cu(I) = 1 was around 0.5 equiv of Cu(I), implying that isoprene was complexed with Cu(I) in a η2 mode. The absorption ability of the Cu(I) solution was strongly dependent on the concentrations of the stabilizers, which prevent the oxidation of Cu(I) to Cu(II). The optimal molar composition of the solution was found to be Cu(I)/pyridine/HNO3 = 1/2.7/1.

Original languageEnglish
Pages (from-to)4717-4720
Number of pages4
JournalIndustrial and Engineering Chemistry Research
Volume44
Issue number13
DOIs
Publication statusPublished - 2005 Jun 22

Fingerprint

Isoprene
isoprene
Complexation
complexation
Pyridine
Nitrates
nitrate
copper
Copper powder
Nitric Acid
Pickups
Nitric acid
nitric acid
Copper
aqueous solution
oxidation
Oxidation
Chemical analysis

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Selective absorption of isoprene from C5 mixtures by π complexation with Cu(). / Son, Seung J.; Choi, Hyun W.; Choi, Dae K.; Lee, Sang D.; Kim, Hoon S.; Kim, Seung Wook.

In: Industrial and Engineering Chemistry Research, Vol. 44, No. 13, 22.06.2005, p. 4717-4720.

Research output: Contribution to journalArticle

Son, Seung J. ; Choi, Hyun W. ; Choi, Dae K. ; Lee, Sang D. ; Kim, Hoon S. ; Kim, Seung Wook. / Selective absorption of isoprene from C5 mixtures by π complexation with Cu(). In: Industrial and Engineering Chemistry Research. 2005 ; Vol. 44, No. 13. pp. 4717-4720.
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AU - Kim, Hoon S.

AU - Kim, Seung Wook

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N2 - Selective absorption of isoprene from n-pentane mixtures was performed via reversible π complexation with an aqueous solution of copper(I) nitrate, which was prepared by the disproportionation reaction between copper powder and cupric nitrate trihydrate [Cu(NO3)2 3H2O] in H2O in the presence of pyridine and nitric acid as stabilizers. The absorption of isoprene by the Cu(I) solution increased with an increase in the molar ratio of isoprene/Cu(I) up to 1 and remained nearly constant thereafter. The maximum isoprene pickup achieved at the molar ratio of isoprene/Cu(I) = 1 was around 0.5 equiv of Cu(I), implying that isoprene was complexed with Cu(I) in a η2 mode. The absorption ability of the Cu(I) solution was strongly dependent on the concentrations of the stabilizers, which prevent the oxidation of Cu(I) to Cu(II). The optimal molar composition of the solution was found to be Cu(I)/pyridine/HNO3 = 1/2.7/1.

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