| 摘要 |
PCT No. PCT/FR91/00028 Sec. 371 Date Jul. 8, 1992 Sec. 102(e) Date Jul. 8, 1992 PCT Filed Jan. 18, 1991 PCT Pub. No. WO91/10366 PCT Pub. Date Jul. 25, 1991.Skimmed milk is subjected to acidification by electrodialysis in one or two successive three-compartment electrodialyzers. The resulting milk is at a pH of 4.5 or 2.8. Milk at a pH of 4.5 may be used for obtaining refined casein as a substitute for rennin casein. Milk at a pH of 2.8 when sterilized and filtered to selectively extract a whey permeate and serum proteins becomes casein in its natural state soluble at a pH in the range 2.8 to 4, which casein may be neutralized in a two-compartment electrodialyzer. The acid permeate is passed over a strong cationic resin in order to be used as an acid agent in the initial electrodialyzers. |
