SEPARATION OF ISOMER OF NITROTOLUIC ACID

Title:

SEPARATION OF ISOMER OF NITROTOLUIC ACID

Document Type and Number:

Japanese Patent JPH10324667

Kind Code:

A

Abstract:

To provide a method for easily and efficiently separating each of both isomers from the mixture of 3-nitro-o-toluic acid and 5-nitro-o-toluic acid in high yield.

This method comprises the steps of adding an aromatic organic base to the mixture of 3-nitro-o-toluic acid and 5-nitro-o-toluic acid, forming a salt in the presence of water or mixed solvent of water and water-soluble organic compound to thereby separate the resultant mixture into a solid component and solution, and recovering 3-nitro-o-toluic acid from the solution and 5-nitro-o-toluic acid from the solid component.

Inventors:

YOKOTA KEIICHI
ITO IKUO
TAKEUCHI SEIJI

Application Number:

JP3561798A

Publication Date:

December 08, 1998

Filing Date:

February 18, 1998

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMIKIN CHEMICAL

International Classes:

C07C201/16; C07C205/57; (IPC1-7): C07C205/57; C07C201/16

Attorney, Agent or Firm:

Yamaguchi Kazu

Previous Patent: NAPHTHALENE-BASED LIQUID CRYSTAL COMPOUND

Next Patent: PRODUCTION OF AMINE FROM OLEFIN BY USING NU-85 ZEOLITE