SEPARATION AND EXTRACTION OF VAPOR-PHASE OXIDATION PRODUCT OF NAPHTHALENE,申请号JP19850259343-传众专利搜索

SEPARATION AND EXTRACTION OF VAPOR-PHASE OXIDATION PRODUCT OF NAPHTHALENE

申请公布号：JPS62120376(A)

申请号：JP19850259343

申请日期：1985.11.19

申请公布日期：1987.06.01

申请人：

SUMIKIN COKE CO LTD

发明人：NISHIZAKI TADAO;MINAMI RYOHEI

分类号：C07C45/00;C07C46/10;C07C50/12;C07C67/00;C07D307/89

主分类号：C07C45/00

摘要：PURPOSE:To economically extract and separate naphthoquinone and phthalic acid from a slurry, by oxidizing naphthalene in the vapor phase in the presence of a catalyst using an aromatic hydrocarbon having a specified boiling point and specific gravity as a solvent and collecting the resultant reaction product with water to give the slurry. CONSTITUTION:Naphthalene is oxidized in the vapor phase in the presence of a catalyst to give a reaction product containing mainly naphthoquinone and phthalic anhydride, which is then collected with water to afford a slurry. The naphthoquinone and phthalic acid are separated from the slurry. In the process, an aromatic hydrocarbon having >145 deg.C boiling point and <=0.9 specific gravity, e.g. cumene, o--p-cymene, pseudocumene, mesitylene or/and hemimellitene, are preferably used as a solvent to carry out extraction, preferably at 40-95 deg.C. Thereby, the above-mentioned solvent which is well separated from an aqueous phase with a small loss of the solvent because of a high vapor pressure is used to advantageously extract and separate the naphthoquinone in the oily phase and phthalic acid in the aqueous phase.