Citric Acid → Trisodium citrate

HRID 2248997Notes

Reaction equation

HRID 2248997 reaction equation
[C:1]([OH:13])(=[O:12])[CH2:2][C:3]([CH2:8][C:9]([OH:11])=[O:10])([C:5]([OH:7])=[O:6])[OH:4].[OH-].[Na+:15]>O>[C:1]([O-:13])(=[O:12])[CH2:2][C:3]([CH2:8][C:9]([O-:11])=[O:10])([C:5]([O-:7])=[O:6])[OH:4].[Na+:15].[Na+:15].[Na+:15]

Participants

4

Reactant 2

HCID 311Citric Acid2×HCID 14798Sodium Hydroxide

Product 1

HCID 6224Trisodium citrate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
80 °C

Procedure

A 1 liter beaker was charged with 141 g of H2O and 189 g of citric acid to simulate citric acid mother liquor. While stirring, 229.5 g of a 50% sodium hydroxide solution was added to bring the pH to 6.7. The solution was heated to 80° C. and filtered as before. The hot solution was placed in a 2 liter, 3 neck round bottom flask fitted with a reflux condenser, stirrer and heating mantle. A total of 1333 ml (1052 g) of ethyl alcohol was added over a 30 minute period while maintaining reflux to form a slurry of sodium citrate crystals.

Workup

  1. filtrationfiltered as before
  2. customfitted with a reflux condenser, stirrer
  3. temperatureheating mantle
  4. additionA total of 1333 ml (1052 g) of ethyl alcohol was added over a 30 minute period
  5. temperaturewhile maintaining
  6. temperaturereflux

Sources & evidence

ORD record
ord-c3c6293967a7439ebb5aa57e5bfa4724
Source dataset
uspto-grants-1991_08
Patent number
US05041645

Reaction notes

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