Food or edible material: processes – compositions – and products – Processes – Heating above ambient temperature
Patent
1994-03-11
1995-08-22
Yeung, George
Food or edible material: processes, compositions, and products
Processes
Heating above ambient temperature
99454, 99470, 99472, 165 66, 426511, A23L 100, A23C 300
Patent
active
054438578
ABSTRACT:
A method of sterilizing a liquid milk based product comprises indirect preheating of the product and final heating to a sterilization temperature 140.degree.-150.degree. C. by direct steam injection. The product is cooled by so called flash-cooling at which steam corresponding to the added amount of steam is evaporated. The product is cooled by indirect cooling. It is now proposed that the product prior to the flash-cooling is cooled from the sterilization temperature 140.degree.-150.degree. C. to a temperature in the interval 90.degree.-120.degree. C. in an indirect, first cooling step after which the product is cooled by flash-cooling to a temperature of 70.degree.-85.degree. C. The apparatus for sterilization comprises a balance vessel (1) connected to an indirectly working first heat exchanger (4) for heating of the milk based product. A steam injection nozzle (6) is arranged in a pipe line out from the heat exchanger (4). After the steam injection nozzzle (6) there is a holding section (8) and a vacuum vessel (10) in which the product is cooled by flash-cooling. A further indirectly working heat exchanger (9) for cooling of the product is connected between the holding section (8) and the vacuum vessel (10).
REFERENCES:
patent: 3512998 (1967-09-01), Clark
patent: 3567470 (1968-06-01), McElroy
patent: 4175141 (1979-11-01), Adams, Jr. et al.
patent: 4610298 (1986-09-01), van Schagen et al.
patent: 4997662 (1991-03-01), Lidman et al.
Arph Olle
Malmgren Bozena
Palm Bengt
Ringstrom Roland
Tetra Laval Holdings & Finance S.A.
Yeung George
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