The Chlorination of Benzene with a Sodium ChlorideFerric Chloride Melt

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概要

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• The chlorination of C<SUB>6</SUB>H<SUB>6</SUB> with a NaCl–FeCl<SUB>3</SUB> (52: 48 in mol) melt was studied in a batch reactor at 250 °C and at a constant pressure. The main chlorinated products were monochlorobenzene (MCB) and dichlorobenzene (DGB). The isomers in DCB were <I>ortho</I> and <I>para</I>, and did not include the <I>meta</I> form. The rate of chlorination was nearly proportional to the benzene pressure in the range from 0.5 to 2.0 atm. When O<SUB>2</SUB> was introduced into the reaction system, both the rate of chlorination and the selectivity of MCB increased with the increase in the partial pressure of O<SUB>2</SUB>. These facts suggest that chlorination proceeds by the electrophilic substitution on the melt surface. It was indicated by an X-ray diffraction examination of the powder of the salts used, which lost the activity for chlorination after a prolonged experiment in the presence of O<SUB>2</SUB>, that the source of Cl was FeCl<SUB>3</SUB> and not NaCl in this reaction.

• 公益社団法人 日本化学会の論文

著者

• Tamai Yasukatsu

  Chemical Research Institute of Non-Aqueous Solutions

• Ohtsuka Yasuo

  Chemical Research Institute of Non-Aqueous Solutions, Tohoku University

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• The Chlorination of Benzene with a Sodium ChlorideFerric Chloride Melt

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