Potassium Carbonate → HCID 131711319, compound

Participants

Reaction Conditions

Reaction Steps

The filtrate obtained in paragraph (1) is mixed with 500 ml of an aqueous L-malic acid solution[L-malic acid content: 75.9 g (0.566 mole)/500 ml], and 39 g (0.282 mole) of potassium carbonate are added thereto. The solution (pH 4.3) is concentrated to about 130 ml and cooled to 10° C. Then, the mixture thus obtained (i.e., the mixture of the concentrated solution and crystals precipitated) is adjusted to a pH 5.4 with potassium hydroxide, and stirred at the same temperature for 6 hours. After stirring, the mixture had the pH of 5.6. The crystalline precipitates are collected by filtration. 102.8 g of monopotassium L-malate monohydrate are obtained. Total amount: 183.7 g Yield: 85.4% (calculated on the basis of L-malic acid used)

Provenance & Evidence