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JPS5798221A - Production of diphenyl - Google Patents

Production of diphenyl

Info

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
Application number
JP17320580A
Other languages
Japanese (ja)
Inventor
Katsuhiko Shiotani
Norio Tomioka
Yuichi Urata
Katsumi Hotta
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.)
SHIN NIPPON SEITETSU KAGAKU KOGYO KK
Nippon Steel Chemical and Materials Co Ltd
Original Assignee
SHIN NIPPON SEITETSU KAGAKU KOGYO KK
Nippon Steel Chemical Co 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 SHIN NIPPON SEITETSU KAGAKU KOGYO KK, Nippon Steel Chemical Co Ltd filed Critical SHIN NIPPON SEITETSU KAGAKU KOGYO KK
Priority to JP17320580A priority Critical patent/JPS5798221A/en
Publication of JPS5798221A publication Critical patent/JPS5798221A/en
Pending legal-status Critical Current

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  • 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
JP17320580A 1980-12-10 1980-12-10 Production of diphenyl Pending JPS5798221A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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