JPS54122246A - Separation of naphthoquinone and phthalic acid - Google Patents
Separation of naphthoquinone and phthalic acidInfo
- 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
Links
Landscapes
- 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
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) |
-
1978
- 1978-03-13 JP JP2776378A patent/JPS54122246A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54163524A (en) | Production of high-purity 2-acrylamide-2- methylpropanesulfonic acid | |
JPS5432431A (en) | Replacement and separation of mother liquor in terephthalic acid suspension | |
JPS52103390A (en) | Removal of acidic substances from reaction product | |
JPS54157529A (en) | Recovery of resorcinol | |
JPS557235A (en) | Preparation of polycyclic aromatic aldehyde | |
JPS54122246A (en) | Separation of naphthoquinone and phthalic acid | |
JPS5214739A (en) | Process for recovery of terephthalic acid | |
JPS532445A (en) | Treatment of liquid phase oxidation reaction residue | |
JPS54141721A (en) | Preparation of methacrylic acid | |
JPS5513255A (en) | Preparation of terephthalic acid | |
JPS5463039A (en) | Preparation of pyromellitic acid and/or pyromellitic anhydride | |
JPS5522630A (en) | Preparation of alpha-phenylethylamine | |
JPS5210229A (en) | Process for separation of high purity terephthalic acid | |
JPS5524143A (en) | Purification of naphthoquinone | |
JPS5566539A (en) | Preparation of m-phenoxybenzoic acid | |
JPS57142938A (en) | Preparation of pinacolone | |
JPS5655341A (en) | Preparation of high-purity o-toluic acid | |
JPS55143927A (en) | Separation of naphthoquinone and phthalic acid | |
JPS577441A (en) | Production of aromatic carboxylic acid or its methyl ester | |
JPS5651243A (en) | Recovery heteropoly-acid catalyst | |
JPS5656231A (en) | Stabilization of recovered oxidation catalyst | |
GB1013618A (en) | Improved process for recovery of adipic acid precursors | |
JPS56139428A (en) | Preparation of isobutylene low polymer | |
JPS55133324A (en) | Removal of aluminum component | |
JPS52133940A (en) | Solid-liquid separation method |