JPS5653635A - Preparation of high purity p-toluic acid - Google Patents

Preparation of high purity p-toluic acid

Info

Publication number
JPS5653635A
JPS5653635A JP12882479A JP12882479A JPS5653635A JP S5653635 A JPS5653635 A JP S5653635A JP 12882479 A JP12882479 A JP 12882479A JP 12882479 A JP12882479 A JP 12882479A JP S5653635 A JPS5653635 A JP S5653635A
Authority
JP
Japan
Prior art keywords
toluic acid
xylene
product
preparation
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.)
Granted
Application number
JP12882479A
Other languages
Japanese (ja)
Other versions
JPS6230975B2 (en
Inventor
Kenichi Tanabe
Yasuhiko Okamoto
Tadao Maruyama
Etsuya Takanobu
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.)
NIPPON JIYOURIYUU KOGYO KK
Original Assignee
NIPPON JIYOURIYUU KOGYO KK
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 NIPPON JIYOURIYUU KOGYO KK filed Critical NIPPON JIYOURIYUU KOGYO KK
Priority to JP12882479A priority Critical patent/JPS5653635A/en
Publication of JPS5653635A publication Critical patent/JPS5653635A/en
Publication of JPS6230975B2 publication Critical patent/JPS6230975B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prepare the titled compound in high purity, by oxidizing p-xylene with O2-containing gas in liquid phase, removing the unreacted xylene from the product by distillation, and heating the product in the presence of sulfuric acid and then a high boiling alcohol, followed by sublimation or distillation.
CONSTITUTION: The reaction product obtained by the liquid-phase oxidation of p-xylene with an O2-containing gas is distilled to remove the unreacted xylene. 0.3W5pts.wt. of ≥90wt% sulfuric acid is added to 100pts.wt. of the crude p-toluic acid obtained, and the mixture is heated at 180W250°C. 100pts.wt. of the resulting crude p-toluic acid is added with 0.1W10pts.wt. of an alcohol having a boiling point of ≥180°C, and heat-treated at 180W250°C. The product is distilled or sublimed to obtain, easily, high-purity p-toluic acid which is a raw material of fluorescent dyes, pesticides, photo-sensitizing dyes, etc., and is esp. useful for the preparation of pharmaceuticals.
COPYRIGHT: (C)1981,JPO&Japio
JP12882479A 1979-10-08 1979-10-08 Preparation of high purity p-toluic acid Granted JPS5653635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12882479A JPS5653635A (en) 1979-10-08 1979-10-08 Preparation of high purity p-toluic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12882479A JPS5653635A (en) 1979-10-08 1979-10-08 Preparation of high purity p-toluic acid

Publications (2)

Publication Number Publication Date
JPS5653635A true JPS5653635A (en) 1981-05-13
JPS6230975B2 JPS6230975B2 (en) 1987-07-06

Family

ID=14994312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12882479A Granted JPS5653635A (en) 1979-10-08 1979-10-08 Preparation of high purity p-toluic acid

Country Status (1)

Country Link
JP (1) JPS5653635A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008534577A (en) * 2005-03-31 2008-08-28 カウンシル・オブ・サイエンティフィック・アンド・インダストリアル・リサーチ Method for producing p-toluic acid by liquid phase oxidation of p-xylene in water
US10125075B2 (en) 2015-02-23 2018-11-13 Toray Industries, Inc. P-toluic acid production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008534577A (en) * 2005-03-31 2008-08-28 カウンシル・オブ・サイエンティフィック・アンド・インダストリアル・リサーチ Method for producing p-toluic acid by liquid phase oxidation of p-xylene in water
US10125075B2 (en) 2015-02-23 2018-11-13 Toray Industries, Inc. P-toluic acid production method

Also Published As

Publication number Publication date
JPS6230975B2 (en) 1987-07-06

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