The desulfurization of polynuclear aromatic sulfur compounds with a Raney nickel.

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概要

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• The mechanism of the desulfurization of the polynuclear thiophene compounds with a Raney nickel was studied in ethanol at atmospheric pressure and from 0 to 78.3 °C. The desulfurization rate was initially fast but reached zero in about 30 minutes. The major products were biphenyl in the desulfurization of dibenzothiophene (<B>1</B>), 1-phenylnaphthalene in the desulfurization of benzo[<I>b</I>]naphtho[1,2-<I>d</I>]thiophene (<B>2</B>), and 2-phenylnaphthalene in the reaction of benzo[<I>b</I>]naphtho[2,3-<I>d</I>]thiophene (<B>3</B>) and benzo[<I>b</I>]naphtho[2,1-<I>d</I>]thiophene (<B>4</B>). The desulfurization extent for the four compounds decreased in this sequence: <B>3</B>><B>1</B>><B>2</B>><B>4</B>. The extent of the desulfurization of the polynuclear thiophene compound was not related to the reaction indices, Fr(E), Fr(N), and Fr(R), of the sulfur atom of the compounds, which were calculated by using a simple Hückel theory; rather, it was related to both the free valence and the π-electron density. Therefore, the polynuclear thiophene compounds were considered to adsorb on a Raney nickel through the free-electron pair of the sulfur atom; consequently, the adsorption led to the C–S bond scission.

• 公益社団法人 日本化学会の論文

著者

• Nagai Masatoshi

  Department of Chemical Engineering, Tokyo University of Agriculture and Technology

• Uetake Kazuya

  Department of Chemical Engineering, Tokyo University of Agriculture and Technology

• Sakikawa Noriyuki

  Department of Chemical Engineering, Tokyo University of Agriculture and Technology

• Uetake Kazuya

  Department of Industrial Chemistry, Nihon University

• Urimoto Hideo

  Department of Industrial Chemistry, Nihon University

• Gonzalez Richard

  Department of Chemical Engineering, University of Illinois at Chicago

関連論文

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• The desulfurization of polynuclear aromatic sulfur compounds with a Raney nickel.
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