| 摘要 |
1,032,587. Drying; milk products. LEYBOLD - HOCHVAKUUM - ANLAGEN G.m.b.H. April 16, 1964 [April 20, 1963], No. 15909/64. Headings A2B and A2D. A dry product is prepared from substances which are separable into an aqueous phase and a coagulated residue, for example milk products such a cream or yoghourt, by mechanically separating the coagulated residue and subjecting the residue to freeze drying, subjecting the aqueous phase to any convenient drying process, and mixing the dry materials so obtained to provide the desired final dry product. For example the aqueous phase may be concentrated and subjected to. freeze drying, vacuum drying, or spray drying. The separation may be effected by decanting, centrifuging, or any other suitable method. In examples, (1) yoghourt is centrifuged, the residue is freeze-dried, the aqueous phase is concentrated under a vacuum and spray dried, and the resultant powders mixed to give a powder which is reconstitutable with water to a product equal to the original product, and (2) cream is innoculated with rennet and pure lactic acid cultures, the coagulate separated by filteration and freeze dried, and the aqueous phase concentrated under vacuum and and spray dried. The mixed dry powders are reconstitutable with water to give a creamy liquid which can be processed and whipped like cream. |
