Reaktionsgleichung
[CH2:1]([C:10]([OH:12])=[O:11])/[C:2](/[C:7]([OH:9])=[O:8])=[CH:3]\[C:4]([OH:6])=[O:5].C(O)(=O)CCC(O)=[O:17]>>[C:4]([OH:6])(=[O:5])[CH2:3][C:2]([CH2:1][C:10]([OH:12])=[O:11])([C:7]([OH:9])=[O:8])[OH:17]Komponenten
Versuchsvorschrift
Trans-aconitic acid, 10.7 g (0.06 mole), is dissolved in 300 ml of water. An excess of strontium oxide, 12.5 g (0.121 mole) mole is added. This brings the pH to 12.4 and produces a mixture of the strontium salt of trans-aconitic acid and free strontium hydroxide. The resulting mixture is then stirred and heated for 3 hours in a Parr pressure reactor at a temperature of 200° C. The reaction mixture is then cooled and mixed with 121 g of 10% sulfuric acid solution. After stirring the mixture for about 10 minutes, it is filtered to remove precipitated SrSO4. The filtrate is then evaporated in vacuo to give a residue which is purified further by digesting with 100 ml acetone and refiltering to remove insolubles. The acetone filtrade is then evaporated to give an 8.8 g residue containing 54.3% (37.6% yield) of citric acid, 9.6% trans-aconitic acid, 4% succinic acid and the balance, mainly water.
Quellen und Nachweise
- ORD-Eintrag
- ord-56cae6393ad04377b39c26acfc32e8d7
- Quelldatensatz
- uspto-grants-1977_11
- Patentnummer
- US04056567
Verknüpfte Notizen
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