Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR PRODUCING BIPHENYL-2,3,2',3'-TETRACARBOXYLIC ACID
Document Type and Number:
Japanese Patent JP2009079009
Kind Code:
A
Abstract:

To provide a method for producing biphenyl-2, 3, 2', 3'-tetracarboxylic acid, by which the objective acid can be produced from inexpensive raw materials in an industrially high yield in excellent productivity.

This method for producing the biphenyl-2, 3, 2', 3'-tetracarboxylic acid is characterized by comprising the first process of subjecting 1, 2-dimethyl-3-chlorobenzene to a coupling reaction to produce biphenyl-2, 3, 2', 3'-tetramethyl, and then crystallizing to isolate the biphenyl-2, 3, 2', 3'-tetramethyl, and the second process of oxidizing the biphenyl-2, 3, 2', 3'-tetramethyl and then crystallizing to isolate the biphenyl-2, 3, 2', 3'-tetracarboxylic acid.


More Like This:
WO/2013/079849METHOD FOR CLEAVING UNSATURATED FATTY CHAINS
WO2004037416VANADIUM CATALYSTS AND PROCESS FOR THE DIRECT CONVERSION OF METHANE INTO ACETIC ACID
JPS591374363-HYDROXY-ALPHA-CYCLOCITRAL, ACETAL AND 3-OXO-ALPHA-CYCLOCITRAL ACETAL THEREOF, MANUFACTURE AND USE
Inventors:
HAYASHI TAMIO
NAKATANI NIRO
Application Number:
JP2007250169A
Publication Date:
April 16, 2009
Filing Date:
September 26, 2007
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HAYASHI TAMIO
TORAY FINECHEMICALS CO LTD
International Classes:
C07C51/285; C07C51/43; C07C63/331; C07B61/00
Domestic Patent References:
JP2007145811A2007-06-14
JPH11269145A1999-10-05
JPS6122034A1986-01-30
JPS63295520A1988-12-01
JP2000128825A2000-05-09
JP2009079008A2009-04-16
JPS6122045A1986-01-30
JP2000281616A2000-10-10
JPH04282326A1992-10-07
Foreign References:
WO2008047707A12008-04-24
Attorney, Agent or Firm:
Shinichi Ogawa
Takashi Noguchi
Kazuhiko Saishita



 
Previous Patent: METHOD FOR PRODUCING BIPHENYL-3, 4, 3', 4'-TETRACARBOXYLIC ACID

Next Patent: METHOD FOR PRODUCING SODIUM SALT OF NAPHTHALENESULFONIC ACID FORMALIN CONDENSATE