Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining
Patent
1991-11-04
1994-01-25
Nguyen, Nam
Sugar, starch, and carbohydrates
Processes
Carbohydrate manufacture and refining
127 55, 127 57, 127 58, 127 61, C13J 106, C13D 312, C13D 316, C13F 102
Patent
active
052812790
ABSTRACT:
A process for producing refined sugar directly from plants of cane or beet raw juices which bypasses the traditional manufacturing of an intermediate product called "raw sugar". After treatment of the sugar juice with a flocculant, the juice has pressurized air dissolved in it, followed by rapid lowering of the pressure to ambient in a dissolved air flotation cell to separate impurities by aeration. Further amounts of flocculant are added, and the juice is passed through a serpentine flocculator comprising a pipe containing a plurality of relatively straight section interrupted by sharp bends to expose the juice sequentially to different turbulent regimes defined by different ranges of Reynolds numbers to form flocs containing undissolved solids. Flocs and other undissolved solids are separated from the juice by flotation and settling. The sugar juice or liquor is partially evaporated to a concentration between about 45.degree. and 50.degree. Brix to form a syrup, after which the syrup is again contacted with a flocculant. Following further treatment in the serpentine flocculator and dissolved air flotation cell, the remaining syrup is passed through filters such as silica sand, activated carbon and diatomaceous earth. The filtered syrup is contacted with ion exchange resins to decolorize and deash the syrup, and then it is evaporated to a concentration of 62.degree.-64.degree. Brix. Thereafter sugar is crystallized from the syrup.
The apparatus for separating undissolved impurities by flotation and settling passes sugar liquor between an assembly of closely spaced plates having corrugations in a direction perpendicular to the direction of flow of the liquor. The plates are disposed at an angle so that settled impurities may slide to the bottom of the assembly.
REFERENCES:
patent: 3607647 (1971-12-01), Hidi
patent: 3718257 (1973-02-01), Bach
patent: 3785863 (1974-01-01), Devillers et al.
patent: 3799806 (1974-03-01), Madsen
patent: 3812010 (1974-08-01), Nitsch
patent: 3853616 (1974-12-01), Rundell et al.
patent: 3874925 (1975-04-01), Loncin
patent: 3909287 (1975-09-01), Rundell et al.
patent: 3926662 (1975-12-01), Rundell et al.
patent: 3961981 (1976-06-01), Pollio et al.
patent: 3982956 (1976-09-01), Schoenrock et al.
patent: 4009706 (1977-03-01), Shaughnessey
patent: 4039348 (1977-08-01), Hunwick
patent: 4046590 (1977-09-01), Riffer
patent: 4063960 (1977-12-01), Paley
patent: 4081288 (1978-03-01), Torres
patent: 4082564 (1978-04-01), Fries et al.
patent: 4083732 (1978-04-01), Paley
patent: 4111714 (1978-09-01), Hippchen et al.
patent: 4116712 (1978-09-01), Othmer
patent: 4135946 (1979-01-01), Casey et al.
patent: 4140541 (1979-02-01), Popper
patent: 4162973 (1979-07-01), Lynch
patent: 4196017 (1980-04-01), Melville et al.
patent: 4211579 (1980-07-01), Quentin
patent: 4234350 (1980-11-01), Suzor
patent: 4247340 (1981-01-01), Cartier
patent: 4252571 (1981-02-01), Reilly
patent: 4288551 (1981-09-01), Gudnason et al.
patent: 4288619 (1981-09-01), Devos et al.
patent: 4312678 (1982-01-01), Landis
patent: 4332622 (1982-06-01), Hohnerlein, Jr. et al.
patent: 4382823 (1983-05-01), Gudnason
patent: 4427454 (1984-01-01), Oyama et al.
patent: 4432806 (1984-02-01), Madsen et al.
patent: 4478645 (1984-10-01), Gudnason
patent: 4502890 (1985-03-01), Urbanic
patent: 4519845 (1985-05-01), Ou
patent: 4523960 (1985-06-01), Otte
patent: 4572742 (1986-02-01), Kunin et al.
patent: 4603000 (1986-07-01), Casey
patent: 4671872 (1987-06-01), Cramer et al.
patent: 4680119 (1987-07-01), Franklin, Jr.
patent: 4692244 (1987-09-01), Supp et al.
patent: 4746368 (1988-05-01), Frank et al.
patent: 4750994 (1988-06-01), Schneider
patent: 4770784 (1988-09-01), Davis et al.
patent: 4799965 (1989-01-01), Bakker et al.
patent: 4871397 (1989-10-01), Stevens
McGraw-Hill Series In Sanitary Science and Water Resources Engineering "Industrial Water Pollution Control" Eckenfelder pp. 52-61 (1966).
Meade-Chen "Cane Sugar Handbook", Eleventh Edition, James C. P. Chen pp. 161-167 (1985).
Gil Enrique G.
Wright Helene P.
Hailey P.
Nguyen Nam
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