JPS5524153A - Recovery of high purity adipic acid - Google Patents
Recovery of high purity adipic acidInfo
- Publication number
- JPS5524153A JPS5524153A JP9773978A JP9773978A JPS5524153A JP S5524153 A JPS5524153 A JP S5524153A JP 9773978 A JP9773978 A JP 9773978A JP 9773978 A JP9773978 A JP 9773978A JP S5524153 A JPS5524153 A JP S5524153A
- Authority
- JP
- Japan
- Prior art keywords
- adipic acid
- liquid
- washing
- phase oxidation
- high purity
- 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 prepare high purity adipic acid useful for the synthesis of nylon, etc., economically, by washing crude adipic acid obtained from acidic waste water produced by the liquid-phase oxidation of cyclohexane, with LB-oil, etc, which are by-products of said liquid-phase oxidation process.
CONSTITUTION: An acidic waste water (containing 5W20% of adipic acid) produced from the process for the production of cyclohexane and cyclohexanol by the liquid-phase oxidation of cyclohexane, is treated to obtain a crude adipic acid, which is washed with LB oil (a low-boiling by-product obtained by the distillation of the above oxidized product to separate the objective compound), cyclohexanone and/or cyclohexanol. High purity adipic acid is obtained from the crude adipic acid prepared above, by nitric acid oxidation, washing with water, treatment with activated charcoal, and recrystallization. The washing is carried out pref. using a multi-stage washing column. The used washing liquid is recycled to a proper stage in the liquid-phase oxidation process.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9773978A JPS5524153A (en) | 1978-08-09 | 1978-08-09 | Recovery of high purity adipic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9773978A JPS5524153A (en) | 1978-08-09 | 1978-08-09 | Recovery of high purity adipic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5524153A true JPS5524153A (en) | 1980-02-21 |
Family
ID=14200256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9773978A Pending JPS5524153A (en) | 1978-08-09 | 1978-08-09 | Recovery of high purity adipic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5524153A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63120119A (en) * | 1986-10-31 | 1988-05-24 | Hiroyuki Kanai | Production of balloon control ring for spinning frame and ring produced thereby |
-
1978
- 1978-08-09 JP JP9773978A patent/JPS5524153A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63120119A (en) * | 1986-10-31 | 1988-05-24 | Hiroyuki Kanai | Production of balloon control ring for spinning frame and ring produced thereby |
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