Reaction equation
Cl.Cl.[NH2:3][C:4]1[CH:9]=[C:8]([NH2:10])[C:7]([OH:11])=[CH:6][C:5]=1[OH:12].[OH:13][C:14]1[CH:22]=[C:21]([C:23]([OH:25])=[O:24])[C:20]([OH:26])=[CH:19][C:15]=1[C:16]([OH:18])=[O:17].[Na+].[Na+].OC1C=C(C([O-])=O)C(O)=CC=1C([O-])=O>O.[OH-].[Na+]>[NH2:3][C:4]1[CH:9]=[C:8]([NH2:10])[C:7]([OH:11])=[CH:6][C:5]=1[OH:12].[OH:13][C:14]1[CH:22]=[C:21]([C:23]([OH:25])=[O:24])[C:20]([OH:26])=[CH:19][C:15]=1[C:16]([OH:18])=[O:17]Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 2
Procedure
7 Parts by weight of 4,6-diamino-1,3-benzenediol dihydrochloride was dissolved in 33 parts by weight of water deaerated with nitrogen. 6.180 Parts by weight of 2,5-dihydroxyterephthalic acid was dissolved in 64 parts by weight of a 1M sodium hydroxide aqueous solution, followed by deaeration with nitrogen. The 4,6-diamino-1,3-benzenediol dihydrochloride aqueous solution was dropwise added to the 2,5-dihydroxyterephthalic acid disodium salt aqueous solution over 10 minutes to form a white precipitate of 4,6-diamino-1,3-benzenediol/2,5-dihydroxyterepthalic acid salt. In this case, the reaction temperature was maintained at 90° C. The resultant salt was recovered by filtering and dispersed in, and mixed with, 3,000 parts by weight of water deaerated with nitrogen, followed by re-filtering. Procedures of the above dispersing/mixing and filtering were repeated 3 times.
Sources & evidence
- ORD record
- ord-dea1617d1fab4018b964b1ee9975a597
- Source dataset
- uspto-grants-2010_11
- Patent number
- US07833644B2
Linked notes
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