REMOVAL OF A SMALL AMOUNT OF METHYLENE CHLORIDE IN ACETONE BY EXTRACTIVE DISTILLA-TION EMPLOYING SALT AS SEPARATING AGENT

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概要

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• Vapor-liquid equilibrium data at one atmosphere are studied for the system methylene chloride-acetone-salt. The salts ZnBr2, ZnCl2, KSCN, MnCl2, Nal, CuCl2, CaCl2, NH4NO3 and LiNO3 are examined to observe the salt effect on the methylene-chloride-acetone system. Effective salts are ZnBr2, ZnCI2 and KSCN, which are more soluble in acetone than are MnCI2, Nal, CuCI2, CaCI2, NH4NO3 and LiNO3. An increase of relative volatility of methylene chloride was observed by adding these salts. By extractive distillation with zinc bromide, high-purity acetone with a methylene chloride content of 0.09 (mole %) or less was obtained.

著者

• HIRATA MITSUHO

  Chemical Engineering Laboratory, Tokyo Metropolitan University

• HIROSE YASUO

  Chemical Engineering Laboratory, Tokyo Metropolitan University

• IINO MASASHI

  Chemical Engineering Laboratory, Tokyo Metropolitan University

• SUDOH JIRO

  Chemical Engineering Laboratory, Tokyo Metropolitan University

• NAKAE AKIRA

  Chemical Engineering Laboratory, Tokyo Metropolitan University

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