| 摘要 |
969,824. Gelatinous vitamin &c. powders. F. HOFFMANN-LA ROCHE & CO. A.G. Sept. 26, 1962 [Sept. 27, 1961], No. 36524/62. Heading A2B. The production of powders involves passing an aqueous colloid solution capable of gelling, at gelling temperature or above, as threads into a liquid in which the colloid is insoluble, cutting up these threads, dispersing the so formed globules in the liquid, gelling them by cooling, and then separating them from the liquid. The colloids are gelatine, pectin, agar, gum tragacanth and sodium alinate. The colloid may carry food colourings and flavourings, feed supplements, vitamins, e.g. vitamins A, D, E and K, carotenoid substances, vitamins B1 and C, and pantothenyl alcohol, plasticizers such as glucose, fructose, sucrose, invert sugar, sorbitol, mannitol and glycerol, antioxidants such as tocopherols, butylated hydroxyanisole, butylated hydroxytoluene, gallic acid esters and 2,2,4-trimethyl-6-ethoxy-1,2-dihydroquinoline, emulsifiers such as lecithin and polyoxyethylene sorbitan monooleate, and diluents or solvents such as sesame, cottonseed, arachis and coconut oils. According to an example, employing the apparatus of the figures, a preparation of vitamin A palmitate, gelatine, sucrose and water is pumped through a pipe 21 into the lower portion 3 of a column 1, there heated to 50‹C., passed through a perforated disc 6 and through 0.25 in. diam. holes in a screen 5 on the disc 6; at the same time, paraffin oil at 5‹C. is pumped through a pipe 15 into the column 1, and, if desired, additional paraffin oil at -5‹C. is pumped into the column 1 at 18; the threads of gelatine preparation from the screen 5 become semiplastic in the cool oil and are cut into globules by a rotating wheel 7 having knife-like spokes; these globules and the oil are stirred in the column 1 by paddles 12 on a rotating shaft 10; the globules gel completely and are removed with the oil at 14, whereupon the globules are filtered from the oil and dried. |
