Process of reducing fouling during heat processing of foods...

A - Human Necessities – 23 – L

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A23L 1/0534 (2006.01)

Patent

CA 2600346

A pasteurization or sterilization process reduces fouling of a food or beverage composition containing protein during the heat treatment. An antifouling agent is added to the food or beverage composition that is selected from hydroxypropylcellulose (HPC) with a hydroxypropyl molar substitution of greater than 3.0 and a weight average molecular weight (Mw) as measured by SEC of greater than 350,000 Dalton, methylhydroxypropylcellulose (MHPC) with a methoxyl content of greater than 17 % and a hydroxypropyl content of greater than 3 %, methylcellulose (MC) with a methoxyl content greater than 17 % and a viscosity in water at ambient temperatures and a concentration of 2 % of greater than 1,000 cps, or mixtures thereof, This food or beverage composition is then heated in a first heat exchanger at a temperature between 50 and 100~ C for a time of from about 2 seconds to 30 minutes for pasteurization or it is further heated to sterilization temperatures before being packaged out or further processed. The improvements of this process is that the heat exchangers are fouled at least 10 % by weight less or run-time increased at least 10 % as compared to when heat-treating a similar food or beverage composition without the antifouling agent.

Technique de pasteurisation ou de stérilisation permettant de réduire les salissures de denrées alimentaires ou de boissons protéinées pris parmi un hydroxypropylcellulose (HPC) avec substitution hydroxypropyle molaire supérieure à 3,0 et poids moléculaire moyen mesuré selon SEC de 350 000 Dalton maximum, un méthylhydroxypropylcellulose (MHPC) avec une teneur en méthoxyle supérieure à 17 % et une teneur en hydroxypropyle supérieure à 3 %, un méthylcellulose (MC) avec une teneur en méthoxyle supérieure à 17 % et une viscosité dans l'eau aux températures ambiantes et en concentration de 2 % supérieure à 1 000 cps, ou dans des mélanges de ces composés. Cette composition denrée alimentaire ou boisson est ensuite chauffée dans un premier échangeur thermique à une température comprise entre 50 et 100° C pendant une durée d'environ 2 secondes à 30 minutes pour la pasteurisation, ou bien chauffée davantage à des températures de stérilisation avant d'être emballée ou soumise à des traitements suplémentaires. Ce processus constitue une amélioration dans la mesure où le degré de salissure des échangeurs de chaleur est inférieur d'au moins 10 % par unité de poids ou que leur durée d'utilisation est supérieure d'au moins 10 % par rapport à un traitement thermique sans agent anti-sallissures.

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