JPS54122246A - Separation of naphthoquinone and phthalic acid - Google Patents

Separation of naphthoquinone and phthalic acid

Info

Publication number
JPS54122246A
JPS54122246A JP2776378A JP2776378A JPS54122246A JP S54122246 A JPS54122246 A JP S54122246A JP 2776378 A JP2776378 A JP 2776378A JP 2776378 A JP2776378 A JP 2776378A JP S54122246 A JPS54122246 A JP S54122246A
Authority
JP
Japan
Prior art keywords
naphthoquinone
phthalic acid
water
solvent
naphthalene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2776378A
Other languages
Japanese (ja)
Inventor
Akira Matsuura
Kunizo Kono
Katsumi Matsuzaki
Masao Narita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Kasei Chemicals Ltd
Original Assignee
Kawasaki Kasei Chemicals Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Kasei Chemicals Ltd filed Critical Kawasaki Kasei Chemicals Ltd
Priority to JP2776378A priority Critical patent/JPS54122246A/en
Publication of JPS54122246A publication Critical patent/JPS54122246A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To separate the title compounds, easily and economically, by contacting gas produced by the gas phase catalytic oxidation of naphthalene with water or an aqueous solvent, and treating the wet cake thus obtained with proper inert solvent at a specific temperature.
CONSTITUTION: Oxidation product containing naphthoquinone and phthalic anhydride obtained by the gas phase catalytic oxidation of naphthalene, is brought into contact with water or an aqueous solvent, and the components are collected as an aqueous slurry. Solid component is spearated from the slurry by filtration, etc. to obtain a wet cake composed of naphthoquinone, phthalic acid and ≤90 wt.%, based on the phthalic acid, of water. The cake is mixed with an inert solvent such as benzene at ≤120°C. The naphthoquinone is extracted with the solvent leaving the phthalic acid as solid state.
COPYRIGHT: (C)1979,JPO&Japio
JP2776378A 1978-03-13 1978-03-13 Separation of naphthoquinone and phthalic acid Pending JPS54122246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2776378A JPS54122246A (en) 1978-03-13 1978-03-13 Separation of naphthoquinone and phthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2776378A JPS54122246A (en) 1978-03-13 1978-03-13 Separation of naphthoquinone and phthalic acid

Publications (1)

Publication Number Publication Date
JPS54122246A true JPS54122246A (en) 1979-09-21

Family

ID=12230036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2776378A Pending JPS54122246A (en) 1978-03-13 1978-03-13 Separation of naphthoquinone and phthalic acid

Country Status (1)

Country Link
JP (1) JPS54122246A (en)

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