Preparation of a powdered vinegar
The present invention provides a powdered vinegar that comprises partly neutralized vinegar, i.e. vinegar derived acid that is partly neutralized with e.g. sodium and/or potassium hydroxide, and free vinegar derived acid. The invention also provides a process for producing such a powdered vinegar and the use of this powdered vinegar in a foodstuff or a beverage, e.g. as a preservative. The present process offers the advantage that it yields a stable, free flowing powdered vinegar that can suitably be used as a preservative in e.g. processed meat products. The powdered vinegar has a high content of free acid, is easy to dissolve and acts as an acidulant.
1. A process of producing a free flowing powdered vinegar comprising free vinegar derived acid and neutralized vinegar derived acid, wherein more than 90% of the free vinegar derived acid and neutralized vinegar derived acid is acetic acid in free and neutralized form, wherein Na+ represents at least 50 mol. % of the cations of salts that are contained in the powdered vinegar, wherein the powdered vinegar has a water content of 9-15 wt. %, at least a fraction of the water being present as a component of hydrated salt, wherein free vinegar derived acid and neutralized vinegar derived acid are contained in the powdered vinegar in a weight ratio of not more than 1:8, the process comprising:
(a) adjusting the pH of a first liquid vinegar to a value within the range of 5.5-7.0 to obtain a neutralized vinegar;
(b) drying the neutralized vinegar to produce vinegar derived particles having a water content of less than 5 wt. %; and
(c) combining a second liquid vinegar with the vinegar derived particles in a weight ratio of 1:15 to 1:1, wherein the vinegar derived particles are agitated and the temperature of the vinegar derived particles and second liquid vinegar is controlled to stay below 54° C.
2. The process according to claim 1 , wherein the first liquid vinegar contains 10-40% (w/v) free acid.
3. The process according to claim 1 , wherein the neutralized vinegar is dried to produce vinegar derived particles having a volume weighted average diameter of 50-500 μm.
4. The process according to claim 1 , wherein the second liquid vinegar comprises 20-55% (w/v) free acid.
5. The process according to claim 1 , wherein the second liquid vinegar is combined with the vinegar derived particles by spraying the second liquid vinegar onto the vinegar derived particles.
6. The process according to claim 1 , wherein the pH of the first liquid vinegar is adjusted to a value within the range of 6.0-7.0.