Use of a phosphate mixture for the production of concentrated solutions and brine for the food industry

Abstract

The invention relates to a novel phosphate mixture, which is characterised by the excellent solubility thereof in water and in aqueous solutions containing salt (brine). The novel phosphate mixture is characterised in that it is made of the following components: 1) 60-85 wt. % of a clear-soluble potassium tripolyphosphate having a P 2 O 5 content of 46.0 wt. %-47.0 wt. %, preferably 46.4 46.8 wt. %, especially 46.4 wt % and a K 2 O/P 2 O 5 Mol ratio of 1.70 1.78, preferably 1.73 1.75 and especially 1.74, 2) 15-39 wt. % of sodium polyphosphate NPP, 3.) 1-5 wt. % XH 2 PO 4 , whereby X═Na and is K, whereby the mixture has a pH-value of between 8-10, preferably 8.5 9.5 and has an opacity in water and brine of <5 TE/F.

1 . The use of a phosphate mixture composed of: 
 a.) 60 to 85 weight % of a clear soluble potassiumpolyphosphate with a P 2 O 5  content of 46.0 weight % to 47.0 weight % and a K 2 O/P 2 O 5  mole ratio of 1.7 to 1.78,    b.) 15 to 39 weight % sodiumpolyphosphate,    c.) 1 to 5 weight % XH 2 PO 4  and/or X 2 H 4 P 2 O 7 , with X═Na and/or K,    wherein the mixture has a pH value of 8 to 10, preferably 8.5 to 9.5 and cloudiness in water and brines of <5 TE/F, for use in the production of phosphate-containing brines in the food industry.    
   
   
       2 . The method for producing phosphate-containing brines, composed of 60 to 85 weight % of a clear soluble potassiumpolyphosphate with a P 2 O 5  content of 46.0 weight % to 47.0 weight %, preferably 46.4-46.8 weight %, in particular 46.4 weight % and a K 2 O/P 2 O 5  mole ratio of 1.74 to 1.78, preferably 1.73 to 1.75 and in particular 1.74, further composed of 15 to 39 weight % sodiumpolyphosphate and 1 to 5 weight % XH 2 PO 4  and/or X 2 H 4 P 2 O 7 , with X═Na and/or K, characterized in that potassiumphosphate salts or potassiumoxide and P 2 O 5  are mixed at the desired potassium:phosphorus ratio, that the mixture is heated to the melting temperature and is kept at this temperature until a balanced reaction forms, that the mixture is then drained, finely ground and mixed at the specified ratio with correspondingly ground powders of sodium polyphosphate, XH 2 PO 4  and/or X 2 H 4 P 2 O 7 , with X═Na and/or K.