2,6-Naphthalenedicarboxylic acid → HCID 23711716, compound

HRID 1682257Notes

Reaction equation

HRID 1682257 reaction equation
[CH:1]1[C:10]2[C:5](=[CH:6][C:7]([C:11]([OH:13])=[O:12])=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[C:14]([OH:16])=[O:15].[K+:17].[K+].C1C2C(=CC(C([O-])=O)=CC=2)C=CC=1C([O-])=O.[K+].C([O-])(=O)C1C(=CC=CC=1)C(O)=O>O>[K+:17].[CH:1]1[C:10]2[C:5](=[CH:6][C:7]([C:11]([OH:13])=[O:12])=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[C:14]([O-:16])=[O:15]

Participants

5

Reactant 3

HCID 143572,6-Naphthalenedicarboxylic acidHCID 14550005Dipotassium naphthalene-2,6-dicarboxylateHCID 23676735Monopotassium phthalate

Product 1

HCID 23711716HCID 23711716, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A process for preparing 2,6-naphthalenedicarboxylic acid which comprises a) reacting 2,6-naphthalenedicarboxylic acid dipotassium salt with phthalic acid monopotassium salt in the presence of water at a temperature of 0°-200° C. to yield solid 2,6-naphthalenedicarboxylic acid monopotassium salt and an aqueous solution of a phthalic acid dipotassium salt; b) separating the solid 2,6-naphthalenedicarboxylic acid monopotassium salt from the aqueous solution containing phthalic acid dipotassium salt; c) reacting the 2,6-naphthalenedicarboxylic acid monopotassium salt with phthalic acid in the presence of water at 0°-200° C. to yield solid 2,6-naphthalenedicarboxylic acid and an aqueous solution of phthalic acid monopotassium salt; d) separating solid 2,6-naphthalenedicarboxylic acid from the aqueous solution containing phthalic acid monopotassium salt; and e) recycyling the aqueous solution containing phthalic acid monopotassium salt to step a).

Workup

  1. customat a temperature of 0°-200° C.

Sources & evidence

ORD record
ord-ea154cfd9b634a369be273e84ee8de6f
Source dataset
uspto-grants-1992_12
Patent number
US05175354

Reaction notes

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