含ヨウ素ジメチルホルムアミドを用いる<I>n</I>-オレフィンの選択的抽出分離
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概要
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The selective extraction of <I>n</I>-olefins from <I>n</I>-olefin/<I>n</I>-paraffin mixture using an iodine-dimethylformamide (DMF) solution was studied. Iodine dissolved in DMF absorbed <I>n</I>-olefin at ambient temperature, forming a DMF-I<SUB>2</SUB>-olefin complex (Fig.-1).<BR>This complex was decomposed on heating at temperatures above 85°C, liberating the absorved olefin (Fig.-2). However, the I<SUB>2</SUB>-DMF solution, after olefin liberation, was no longer able to absorb olefins repeatedly even at ambient temperature.<BR>The addition of the excess amounts of other olefins, which can be separated by distillation from the recovered olefin, to the DMF-I<SUB>2</SUB>-olefin complex liberated the absorbed olefin by replacement at ambient temperature (Fig.-3). A remarkable effect of light irradiation on this replacement rate was observed (Fig.-4).<BR>To study the industrial applications of this selective extraction method, a C<SUB>10</SUB>-C<SUB>13</SUB> <I>n</I>-olefin/<I>n</I>-paraffin mixture, a raw material for the production of linear detergent alkylate, was used. Normal-olefin having a purity of 94.6% was recovered from the mixture (Table-3).
- 社団法人 日本油化学会の論文