JPS5798221A - Production of diphenyl - Google Patents
Production of diphenylInfo
- Publication number
- JPS5798221A JPS5798221A JP17320580A JP17320580A JPS5798221A JP S5798221 A JPS5798221 A JP S5798221A JP 17320580 A JP17320580 A JP 17320580A JP 17320580 A JP17320580 A JP 17320580A JP S5798221 A JPS5798221 A JP S5798221A
- Authority
- JP
- Japan
- Prior art keywords
- diphenyl
- fraction
- purity
- crystallization
- distilled
- 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: A hydrocarbon fraction containing diphenyl is distilled to prepare the concentrated diphenyl fraction having a specific range of composition and the resultant fraction is subjected to continuous counter-current crystallization to produce high-purity diphenyl.
CONSTITUTION: A hydrocarbon fraction containing diphenyl such as a coal tar fraction boiling at 200W280°C is distilled so that the diphenyl content becomes more than 60wt%, preferably 70W90wt% and the weight ratio of β-methylnaphthalene/diphenyl becomes less than 0.15, preferably less than 0.1 to prepare the diphenyl fraction. Then, the fraction is subjected to continuous crystallization to produce high-purity diphenyl. In the continuous crystallization, the diphenyl fraction is cooled to 20W65°C and the precipitating diphenyl crystalls are settled, then the settled crystals are melted and taken out to give diphenyl of purity as high as more than 99%.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17320580A JPS5798221A (en) | 1980-12-10 | 1980-12-10 | Production of diphenyl |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17320580A JPS5798221A (en) | 1980-12-10 | 1980-12-10 | Production of diphenyl |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5798221A true JPS5798221A (en) | 1982-06-18 |
Family
ID=15956054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17320580A Pending JPS5798221A (en) | 1980-12-10 | 1980-12-10 | Production of diphenyl |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5798221A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103288584A (en) * | 2013-05-13 | 2013-09-11 | 天津市兴源化工有限公司 | Process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10 |
-
1980
- 1980-12-10 JP JP17320580A patent/JPS5798221A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103288584A (en) * | 2013-05-13 | 2013-09-11 | 天津市兴源化工有限公司 | Process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10 |
CN103288584B (en) * | 2013-05-13 | 2015-11-04 | 天津市兴源化工有限公司 | Reformed arene C 10the processing method of middle extraction high-purity beta-methylnaphthalene |
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