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(11)    Patent No :    AP 1990   
(21)    Application No :    AP/P/2005/003381   
(22)    Filing Date :    30.01.2004   
(24)    Date of Grant &    07.04.2009   
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
NL    1022547    31.01.2003

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
(73) Applicant(s)


TNO, Schoemakerstraat 97, NL- 2628 VK Delft,

The Netherlands

(72) Inventors

AKKERMAN Jan Coen, The Netherlands

BUSSMANN Paulus Josephus Jozef, The


HEIJMANS Rudy Mathias Henricus, The


et al

(74) Representative


(51)  International  Classification   A22D 8/06 (2006.01)    A23F 5/04 (2006.01)
A23G 1/00 (2006.01)   

(54)    Title

Process for thermally treating a product with steam

(57)    Abstract

A method for thermally treating a product in order to have the product obtain the desired product properties, comprising the following steps: (a) determining the water activity value which, for carrying out the thermal treatment, is required to have the product obtain the desired properties; (b) contacting the product with water vapour, at an increased temperature and an associated saturated vapour pressure (p*), while the temperature on the

surface of the product is 80 - 260°C; (c) setting a vapour pressure (p) in step
(b) such that p/p* is equal to the water activity value determined in step (a);

and (d) maintaining for a time duration (t) the process conditions mentioned in steps (b) and (c) for obtaining the product with the desired product


(56)    Documents Cited :    FR 2 792 810 A    EP 0 308 003 A    FR 2 788 336 A


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