Process for carboxylation of naphthoic acid to naphthalene dicarboxylic acid - Patent US6479699(B2)
Filed:
Jul 03, 2001
Published:
Nov 12, 2002
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° C. to about 420° C., and, in a second step, disproportionating the product of said selective carboxylation at a temperature above about 420° C. to form a product with a greatly improved yield of 2,6-naphthalene dicarboxylic acid, or other aromatic dicarboxylic acid.Applicants
-
MOSSI GHISOLFI OVERSEAS S A
Inventors
-
KING WILLIAM LARRY
-
PFREHM SUSAN SECOR
-
BROWNSCOMBE THOMAS FAIRCHILD
-
DUBOIS DONN ANTHONY
Application Number
09898890Priority Claims
US15149799Family Members
US2002002302(A1) -
Process for carboxylation of naphthoic acid to naphthalene dicarboxylic acid
US6479699(B2) -
Process for carboxylation of naphthoic acid to naphthalene dicarboxylic acid
