Title:
【発明の名称】ナフトエ酸のナフタレンジカルボン酸へのカルボキシル化方法
Document Type and Number:
Japanese Patent JP2003508364
Kind Code:
A
Abstract:
Disclosed is a method for selective carboxylation of naphthoic acid, or other aromatic mono-acids to form primarily 2,3-naphthalene dicarboxylic acid (2,3-NDA) or other aromatic diacids which comprises reacting said aromatic mono-acid in the presence of one or more metal oxide catalysts, alone, or in combination, and in the presence of about 0.2 to 0.8 moles excess of base over aromatic mono-acid, at a temperature of about 380 DEG C to about 420 DEG C, and, in a second step, disproportionating the product of said selective carboxylation at a temperature above about 420 DEG C to form a product with a greatly improved yield of 2,6-naphthalene dicarboxylic acid, or other aromatic dicarboxylic acid.
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Inventors:
Brown's Combe, Thomas El
Dou Boys, Don Ai
Preframe, Susan S
King, William Elle
Dou Boys, Don Ai
Preframe, Susan S
King, William Elle
Application Number:
JP2001519641A
Publication Date:
March 04, 2003
Filing Date:
August 08, 2000
Export Citation:
Assignee:
Mossi and Guisolfi Overseas Society of Anonymous
International Classes:
C07C51/00; B01J27/232; C07B61/00; C07C51/02; C07C51/15; C07C51/265; C07C51/41; C07C51/42; C07C51/43; C07C51/47; C07C51/487; C07C63/16; C07C63/24; C07C63/26; C07C63/38; C08G63/189; (IPC1-7): C07C51/00; C07C63/16; C07C63/24; C07C63/26; C07C63/38
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)