Soybean protein isolation protein for injection and production method thereof

The invention relates to an injection-type soybean separated protein and method for producing the same, which is purify and modification for high-purity soybean separated protein. The method includes: performing acid alkali extraction to the low-temperature degreasing bean pulp prepared by soybean; separation and purification; performing high-temperature sterilization treatment, flash evaporation and spray drying to obtain powdery plant protein for foods additive with the purity of more than 90%; and then further performing mechanical ultra-fine grinding and spraying transformation to obtain the injection-type soybean separated protein with uniform fine granules. The high-purity injection-type soybean separated protein produced by the invention has uniform fine granules (53-75 mu m), 95% of which can sieve with a 200 mesh sieve and 90% can sieve with a 270 mesh sieve, so that the granules can be quickly dispersed in water to form a stable emulsion, and can be widely applied in meat food injection and dairy fo