Potassium Carbonate → HCID 131711319, compound

HRID 1703517Notes

Reaction equation

HRID 1703517 reaction equation
[C:1]([OH:9])(=[O:8])[C@H:2]([CH2:4][C:5]([OH:7])=[O:6])[OH:3].C(=O)([O-])[O-].[K+:14].[K+]>>[OH2:3].[C:1]([O-:9])(=[O:8])[C@H:2]([CH2:4][C:5]([OH:7])=[O:6])[OH:3].[K+:14]

Participants

3

Reactant 2

HCID 11430Potassium CarbonateHCID 222656L-Malic Acid

Product 1

HCID 131711319HCID 131711319, compoundYield 191.7%

Conditions

Temperature
10 °C

Procedure

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)

Workup

  1. additionare added
  2. concentrationThe solution (pH 4.3) is concentrated to about 130 ml
  3. customThen, the mixture thus obtained (i.e.
  4. additionthe mixture of the concentrated solution and crystals
  5. customprecipitated)
  6. stirringAfter stirring
  7. customThe crystalline precipitates
  8. filtrationare collected by filtration

Sources & evidence

ORD record
ord-9d4db0970a234f90a1af887420f17182
Source dataset
uspto-grants-1978_11
Patent number
US04124636

Reaction notes

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