JPS5795923A - Preparation of beta-methylnaphthalene - Google Patents

Preparation of beta-methylnaphthalene

Info

Publication number
JPS5795923A
JPS5795923A JP17202380A JP17202380A JPS5795923A JP S5795923 A JPS5795923 A JP S5795923A JP 17202380 A JP17202380 A JP 17202380A JP 17202380 A JP17202380 A JP 17202380A JP S5795923 A JPS5795923 A JP S5795923A
Authority
JP
Japan
Prior art keywords
methylnaphthalene
pref
fraction
naphthalene
heating zone
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
JP17202380A
Other languages
Japanese (ja)
Inventor
Kiyoshi Sakuma
Katsuhiko Shiotani
Kihachiro Oota
Hiroshi Ono
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 JP17202380A priority Critical patent/JPS5795923A/en
Publication of JPS5795923A publication Critical patent/JPS5795923A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To prepare β-methylnaphthalene useful as a raw material of dyes, pharmaceuticals, vitamin K, etc., in high purity, by distilling an oil fraction containing β-methyl-napthalene under controlled naphthalene content, and subjecting the resultant distillate to countercurrent continuous crystallization.
CONSTITUTION: An oil fraction containing β-methylnaphthalene (pref. coal tar fration having a boiling point range of 200W300°C) is distilled to obtain β- methylnaphthalene fraction having a β-methylnaphthalene content of ≥60wt%, pref. 70W90wt% and a naphthalene/β-methylnaphthalene weight ratio of ≤0.1, pref. ≤0.05. The β-methylnaphthalene fraction is continuously crystallized to obtain β-methylnaphthalene. The continuous crystallization is carried out by cooling the fraction in the upper cooling zone maintained at -5W+15°C, precipitating the crystallized crystals to the lower heating zone maintained at 31W 34.4°C, and extracting the molten β-methylnaphthalene from the heating zone.
COPYRIGHT: (C)1982,JPO&Japio
JP17202380A 1980-12-08 1980-12-08 Preparation of beta-methylnaphthalene Pending JPS5795923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17202380A JPS5795923A (en) 1980-12-08 1980-12-08 Preparation of beta-methylnaphthalene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17202380A JPS5795923A (en) 1980-12-08 1980-12-08 Preparation of beta-methylnaphthalene

Publications (1)

Publication Number Publication Date
JPS5795923A true JPS5795923A (en) 1982-06-15

Family

ID=15934084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17202380A Pending JPS5795923A (en) 1980-12-08 1980-12-08 Preparation of beta-methylnaphthalene

Country Status (1)

Country Link
JP (1) JPS5795923A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930055A1 (en) * 1988-09-10 1990-03-15 Kureha Chemical Ind Co Ltd CLATHRATE COMPLEXES AND METHOD FOR SEPARATING ALKYL-SUBSTITUTED NAPHTHALINE DERIVATIVES BY MEANS OF THE CLATHRATE COMPLEXES
JP2001031673A (en) * 1999-07-15 2001-02-06 Nippon Steel Chem Co Ltd Production of benzothiophene

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930055A1 (en) * 1988-09-10 1990-03-15 Kureha Chemical Ind Co Ltd CLATHRATE COMPLEXES AND METHOD FOR SEPARATING ALKYL-SUBSTITUTED NAPHTHALINE DERIVATIVES BY MEANS OF THE CLATHRATE COMPLEXES
JP2001031673A (en) * 1999-07-15 2001-02-06 Nippon Steel Chem Co Ltd Production of benzothiophene

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