Milk protein concentrate of high thermal stability and preparation method thereof

The invention discloses milk protein concentrates of high thermal stability and preparation method thereof.It the described method comprises the following steps: (1) taking raw milk degreasing, emulsification salt is added, the quality percent by volume of the emulsification salt is 0.1-0.5%, the emulsification salt is any two or three in sodium citrate, sodium pyrophosphate and tertiary sodium phosphate, and the mass ratio of the sodium citrate and sodium pyrophosphate is 2: 3-3: 2；The mass ratio of the sodium citrate and tertiary sodium phosphate is 3: 7-7: 3；The mass ratio of the sodium pyrophosphate and tertiary sodium phosphate be 3: 2-4: 1,50-55 DEG C 50-100 revs/min of stirring 5-10 minute, adjusting pH to 5.0-6.5, sterilize；(2) it is concentrated by evaporation after 10-40 DEG C of ultrafiltration or filter wash is concentrated, spray drying.The present invention prevents albuminous degeneration very well, improves production efficiency.Obtained milk protein concentrate has preferable thermal stability at high temperature.