Process for controlling the rate of growth of particulate masses

Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining

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23230A, 23301, 127 15, 127 16, 127 58, 127 62, 159 44, 159 45, 356 73, 364500, 422245, 422111, C13G 106, C13F 102

Patent

active

041557743

ABSTRACT:
A vacuum pan is controlled by directly monitoring the total solids concentration of a boiling solution. A preferred type of process relates the change in concentration of sugar in a massecuite to the growth rate and increase in the number of crystals, and uses this relationship to control the rate of growth of the crystals by setting temperature and pressure to correspond to the rate of crystal growth desired. Water is evaporated from the pan solution at reduced temperature and pressure. Massecuite is withdrawn from the pan, and split into two streams: (1) a first stream wherein the mother liquor is separated from the sugar crystals and analyzed to determine the total sucrose content of the stream, and (2) a second stream which is analyzed to determine the count and size of the crystals. The sum-total of the two streams is used to determine the total concentration of sugar. Readings taken over definite intervals determine the rate of growth of the crystals.

REFERENCES:
patent: 3220883 (1965-11-01), Howard
patent: 3503803 (1970-03-01), Bennett
patent: 3681025 (1972-08-01), Dalgaard
patent: 3694158 (1972-09-01), Laver
patent: 3725127 (1973-04-01), Retali
patent: 3899386 (1975-08-01), Komiyama
patent: 3981739 (1976-09-01), Dmitrovsky
patent: 4009045 (1977-02-01), Petri
patent: 4016001 (1977-04-01), Hoks
Spencer-Meade "Cane Sugar Handbook", 9th Edition, 180-188, John Wiley & Sons, New York, 1963.
"Beet-Sugar Technology", R. A. McGinnis, ed., 2nd Edition, 682-683, Beet Sugar Devel. Found., Fort Collins, 1971.

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