GB277572A - Method of manufacturing starch - Google Patents

Abstract

277,572. Marks, E. C. R., (Corn Products Refining Co.). April 8, 1927. Starch manufacture comprises steeping and disintegrating the corn or other starch-bearing material, separating germ, bran, and fibre, tabling the starch and gluten to remove the gluten and water, filtering the starch with fresh water to remove solubles and using the water from the gluten for treating further material, a part in the steeping and the balance in the germ and coarse slop separation, while the filtrate from the starch is used, preferably heated, in the fine slop separation. Two starch washing filters M1, M2 are used in tandem and the starch from the tables is diluted with water, dewatered and washed with fresh water from hot and cold pipes 61, 62 and thereafter diluted in a vessel O and dewatered and washed with fresh water in the second filter. The filtrate from the second filter M2 is used for diluting the starch going to the first filter. Sulphur dioxide is introduced only at the steep and with the fresh water used in the filtering. Eleven steep tanks A1 - - A11 are shown, seven being in operation in series, connected by pipes 25 with heaters 26. The corn passes to a mill B1 after washing with water from pipe 27 connected to the gluten settlers K1, K2. The germs are floated off in a separator D1, whence they pass through reels E1, E2, E3 and are pressed for extraction of water at F1. Gluten overflow water passes by pipe 28 into the reel E3, by pipe 29 to the reel E2, and thence with liquid from reel E1 to separator D1, from which the settled solid passes through a draining reel E5 to a mill B2 and then to a, separator D2 to which liquid passes from reels E2, E5. From separator D2 the degerminated material passes through a coarse reel E6 and fine reel E7, whence it passes to the tables, a part being diverted if required by pipe 36 to the germ system. The tailings of starch, gluten and bran from reels E6, E7 pass by pipes 37, 38 to a mill B3 and thence through coarse slop reels G1 - - G4 fed with gluten overflow water to a press F2, whence water is returned to the reel G3. Starch liquor from the reel G1 passes by pipe through the reel G5 to tables. The tailings from draining reel G5 pass by pipe 45 to fine slop reels HI, H2, H3 to a press F3 to collect the bran, whence the water passes to the reel H3, these reels being watered from the starch filtrates by pipe 46. Starch liquor from the reel H1 passes to the tables. The starch, gluten water and solubles pass through cleaning shakers I1, I2 to starch table J1, whence the gluten and water pass to settlers K1. The tailings from shaker I2 pass to reel H2. A second table J2 is being flushed with starch filtrate water and led through a shaker 13 to the starch filters M1, M2 and a further filter N, the filtrate from which passes to the shaker I3 or the fine slop system. The water may be heated at L1 and L2.