GB288546A - Improvements in and relating to the manufacture of starch - Google Patents

Abstract

288,546. Corn Products Co., Ltd., (Assignees of McCoy, R. 0.). April 11, 1927, [Convention date]. Starch is prepared from maize or other starch bearing material by subjecting the disintegrated material in water to separating operations yielding a mixture of starch and gluten, tabling the mixture, and re-using the effluent from the tabling with the gluten it contains for subsequent separations. The table effluent is used for coarse and fine slop separation, and water from washing the starch after tabling is used for germ and fine slop separations. Gluten is removed from part of the table effluent, which is then used for steeping maize. Steep tanks A1 - - A12 are shown in operation in series connected by pipes with heaters l. The maize passes from tank A1 to a mill B1 after washing with water from pipe 2 from gluten settlers K1, K2. The water is then heated to 125‹ F. and passes through a sulphur tower to other steeping tanks. From mill B1 the disintegrated material passes by pipe 4 to a separator D1, from which germs are floated by a pipe 5 to germ reels E1, E2, E3 and to a press F1. Water is returned by pipe 6 from the press to reel E3 and thence by pipe 7 to reel E2, the liquid from reels E2, E3 passing by pipes 8 to separator D1. The hulls and grits pass by pipe 9 from separator D1 to a draining reel E4 and a mill B2, and pass by pipes 10, 11 to a second separator D2, whence the germs are returned by pipe 12 to separator D1. From D2 the hulls pass by pipe 13 to a draining reel E5 and a silk reel E6, whence the tailings pass by pipes 14, 15 to a mill B3 and thence through coarse slop reels G1 - - G4 to a washing reel G5 and to a press F2. Liquid from reel G4 passes to reel G3, thence to reel G2 and thence to reel G1. Material in reel G5 is washed by water from press F2 and by gluten and water mixture from the tables entering by pipe 20. From reel G1 the liquid passes by pipe 21 to fine slop silk reels H1 - - H4 and so to a press F3. Water from starch filter passes by a pipe 31 and from the press F3 to reel H4, whence it passes by pipe 29 to reel F3 and by pipe 30 to reel H3. Liquid from reel H3 passes to a tank 23, whence it is fed by a pipe 25 to reel H2 and by pipe 24 to reel G4. A pipe 26 leads water from reel H2 to separator D1. Liquid from reels E6 and HI pass by pipes 27, 28 to starch tables J1, J2. The water and gluten pass into a tank 32, whence a part is returned by pipe 20 to reel G5, and a part passes to settlers K1, K2, where the gluten is pressed out at F3 and the water passesto the steeping system. Starch on table J2 is flushed off by water from pipe 35 from a starch filter and circulated by pipe 36, and is discharged by pipe 37 into a tank 38 whence it passes to filter M1. After drawing fresh water through it, the starch passes by pipe 39 to a diluting tank 40. The filtrate passes to a press N, and thence a part to a sulphur tower C4 and back to the press, a part to diluting tank 40, and a part by pipe 31 to reel H4. After de-watering, the starch is washed in filter M2 and is finally discharged at f. Fresh water enters by pipe 45 and the filtrate from M2 passes by pipe 35 to table J2. Sulphur towers C1 - - C4 for adding sulphur dioxide and heaters L1 - - L4 are introduced where shown or where required.