Process for the removal of undesired flavour and odour components from potassium lactate
The present invention relates to a process for the removal of undesirable flavours and odours from potassium lactate, wherein the potassium lactate is treated with active carbon. According to this method a potassium lactate is obtained which does not have the bitter aftertaste of the potassium lactate according to the state of the art.
1. A process for the removal of undesirable flavours and odours from a potassium lactate solution, the method comprising:
(a) heating the potassium lactate solution to a temperature between 20° C.-60 20 C.; and
(b) passing the potassium lactate solution continuously through a column of active carbon having a particle size of 0.5 to 3 mm,
wherein undesirable flavours and odours are removed from the potassium lactate solution.
2. The process according to claim 1 , wherein the active carbon is pre-treated by washing with hydrochloric acid and neutralising with sodium bicarbonate.
3. The process according to claim 1 , wherein the potassium lactate solution comprises 40 to 80 % potassium lactate, based on the combined weight of water and potassium lactate.
4. The process according to claim 3 , wherein the potassium lactate solution contains additional foodstuff additives.
5. The process according to claim 4 , wherein the additional foodstuff additives are selected from acetic acid, sodium acetate, sodium diacetate, potassium acetate, potassium diacetate, citric acid, sodium citrate potassium citrate, or mixtures thereof.
6. The process according to claim 1 , wherein the potassium lactate solution, after passage through the column of active carbon, is further supplied to a first filter whereby particles larger than 1 μm are removed.
7. The process according to claim 6 , wherein after the first filter the potassium lactate solution is supplied to a second filter, whereby particles larger than 0.5 μm are removed.
8. The process according to claim 1 , wherein the the potassium lactate solution has a residence time in the column of active carbon of 20 to 40 minutes.
9. The process according to claim 3 , wherein the potassium lactate solution is mixed with active carbon, the solution is stirred during 20 to 40 minutes, and the active carbon is separated from the potassium lactate.