| abstract |
The invention belongs to the field of fine chemicals, in particular to the field of cosmetics, and provides a preparation method of high-molecular-weight cosmetic-grade polyglutamic acid. Soil filtration, the filtrate is concentrated and then vacuum-dried to obtain a high-purity cosmetic-grade polyglutamic acid solid product; the preparation method has clear ideas, simple operation, low equipment investment, low production cost and high polyglutamic acid yield. , suitable for industrial production, and the product has no reagent residue, suitable for use as a cosmetic raw material, which can effectively promote the market promotion of polyglutamic acid and improve the competitive advantage of the product. |