D-(-)-Tartaric Acid synthesis
- Product Name:D-(-)-Tartaric Acid
- CAS Number:147-71-7
- Molecular formula:C4H6O6
- Molecular Weight:150.09
57341-16-9
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Yield:147-71-7 25%
Reaction Conditions:
with sulfuric acid in ethanol at 20; for 0.75 h;
Steps:
6 EXAMPLE 6 Preparation of Crystalline D-tartaric Acid from Recovered D-potassium Hydrogen Tartrate in Ethanol
A slurry of recovered D-potassium hydrogen tartrate (22.1 g, 0.117 mol) in ethanol (148 g) is treated with concentrated sulfuric acid (6.0 g, 0.0588 mol) at room temperature, stirred for 45 minutes and filtered to remove inorganic salts. The filtrate is concentrated in vacuo to a viscous slurry. The slurry is diluted with acetonitrile and filtered. The filtercake is washed with acetonitrile and dried to afford crystalline D-tartaric acid, 4.7 g, (25% recovery), 92.3% purity as determined by HPLC analysis.
References:
US6346649,2002,B1 Location in patent:Page column 7-8
15770-22-6
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133-37-9
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95-43-2
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147-71-7
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