Reaktion #1728657

Reaktionsgleichung

hydroquinone

Hydroquinone

potassium carbonate

potassium formate

→

Dipotassium 2,5-dihydroxyterephthalate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeto provide a homogeneous solution
2. 2
   SonstigeExcess carbon dioxide was bubbled through the stirred solution for about 8 h
3. 3
   Filtrationfiltered
4. 4
   workup.STIRRINGstirred
5. 5
   Sonstigereaction mass
6. 6
   Filtrationwas filtered
7. 7
   Sonstigethe sparingly soluble dipotassium 2,5-dihydroxyterephthalate was separated from water-soluble potassium formate and potassium carbonate

Vorschrift

Dipotassium 2,5-dihydroxyterephthalate was prepared in the known “Kolbe-Schmidt” type reaction from hydroquinone. Hydroquinone was mixed with potassium carbonate and potassium formate, the latter which acted as a solvent when molten. The mixture was heated to 200° C. with stirring to provide a homogeneous solution. Excess carbon dioxide was bubbled through the stirred solution for about 8 h. Excess carbon dioxide optionally may be recycled. The reaction mass was drowned in water, and filtered. When the drowned and stirred reaction mass was filtered, the sparingly soluble dipotassium 2,5-dihydroxyterephthalate was separated from water-soluble potassium formate and potassium carbonate.

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