JPS5675445A - Recovering method of mercaptan - Google Patents
Recovering method of mercaptanInfo
- Publication number
- JPS5675445A JPS5675445A JP15203679A JP15203679A JPS5675445A JP S5675445 A JPS5675445 A JP S5675445A JP 15203679 A JP15203679 A JP 15203679A JP 15203679 A JP15203679 A JP 15203679A JP S5675445 A JPS5675445 A JP S5675445A
- Authority
- JP
- Japan
- Prior art keywords
- mercaptan
- phenol
- oxidation reaction
- hydrogenated
- residue
- 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 recover a mercaptan in high yield by oxidizing an alkyl aromatic compound in the liquid phase in the presence of a mercaptan as a catalyst, distilling off a phenol, etc. from the resultant oxidation reaction mixture, hydrogenating the distillation residue, and distilling the hydrogenated residue.
CONSTITUTION: An alkyl aromatic compound, e.g. p-cymene, is oxidized with molecular oxygen in the liquid phase in an organic solvent, e.g. acetic acid, in the presence of a mercaptan having an acid dissociation constant less than 7.8, at 50W 80°C and atmospheric pressure. A phenol or a fraction having a lower boiling point than the phenol is distilled from the resultant oxidation reaction mixture, and the distillation residue is then hydrogenated in the presence of a metal sulfide, e.g. cobalt sulfide, alone or supported on a carrier, as a catalyst, at 120W250°C and a hydrogen pressure of 2W50kg/cm2. The hydrogenated residue is distilled at 150°C or below and 90mmHg or below, to recover the mercaptan in high yield, which may be reused in the oxidation reaction.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15203679A JPS5675445A (en) | 1979-11-26 | 1979-11-26 | Recovering method of mercaptan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15203679A JPS5675445A (en) | 1979-11-26 | 1979-11-26 | Recovering method of mercaptan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5675445A true JPS5675445A (en) | 1981-06-22 |
Family
ID=15531645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15203679A Pending JPS5675445A (en) | 1979-11-26 | 1979-11-26 | Recovering method of mercaptan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5675445A (en) |
-
1979
- 1979-11-26 JP JP15203679A patent/JPS5675445A/en active Pending
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