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WO1997021361B1 - High temperature/ultra-high pressure sterilization of low acid foods - Google Patents

High temperature/ultra-high pressure sterilization of low acid foods

Info

Publication number
WO1997021361B1
WO1997021361B1 PCT/IB1996/001500 IB9601500W WO9721361B1 WO 1997021361 B1 WO1997021361 B1 WO 1997021361B1 IB 9601500 W IB9601500 W IB 9601500W WO 9721361 B1 WO9721361 B1 WO 9721361B1
Authority
WO
WIPO (PCT)
Prior art keywords
ultra
temperature
low acid
high pressure
pressure
Prior art date
Application number
PCT/IB1996/001500
Other languages
French (fr)
Other versions
WO1997021361A1 (en
Filing date
Publication date
Priority claimed from US08/572,656 external-priority patent/US6086936A/en
Application filed filed Critical
Priority to BR9611951-9A priority Critical patent/BR9611951A/en
Priority to DE69628032T priority patent/DE69628032T2/en
Priority to DK96945769T priority patent/DK0866667T3/en
Priority to JP52190097A priority patent/JP3672931B2/en
Priority to EP96945769A priority patent/EP0866667B1/en
Priority to CA002239291A priority patent/CA2239291C/en
Priority to AU18067/97A priority patent/AU711708B2/en
Priority to AT96945769T priority patent/ATE239387T1/en
Publication of WO1997021361A1 publication Critical patent/WO1997021361A1/en
Publication of WO1997021361B1 publication Critical patent/WO1997021361B1/en

Links

Abstract

Method for sterilizing low acid foods using both ultra-high pressures and high temperatures. The instantaneous temperature change that occurs when pressure is applied combines a high-temperature short-time process with ultra-high pressure to deliver a fast and therefore gentle thermal process to a pre-packaged product. The process involves heating a low acid food to a pre-pressurized temperature, subjecting the food to ultra-high pressure, which instantaneously raises the temperature of the food, and then releasing the pressure so that the temperature returns to the original pre-pressurized temperature. The method leverages the adiabatic temperature rise which occurs when the food is hydrostatically pressurized, coupled with the lethality of the pressure, to achieve appropriate sterilization conditions. The disclosure also includes low acid foods which have been sterilized using both ultra-high pressures and high temperatures.

Claims

AMENDED CLAIMS[reccned b\ the International Bureau on 10 June 1997 (30 06 97). original claims 1-1 amended, remaining claims unchanged ( 1 page)]
1. A method of sterilizing a low acid food product comprising the steps of :
(a) heating the low acid food product to a pre-pressurized temperature,
(b) subjecting the low acid food product to an ultra-high pressure thereby instantaneously increasing the temperature to a pressurized temperature,
(c) releasing the pressure, thereby returning the low acid food product to the pre- pressurized temperature, and
(d) cooling the low acid food product to a desired end temperature.
2. A method of sterilizing low-acid food using a combination of ultra-high pressure and high temperature to achieve commercial sterility.
3. A method of sterilizing a low acid food comprising the step of applying pressure to said low acid food thereby instantaneously increasing the temperature to effect the sterilization.
4. The method according to claim l, wherein the ultra-high pressure is applied hydrostatically.
5. The method according to claim 1, wherein a targeted Fo lethality is achieved.
6. The method according to claim 1, wherein the ultra-high pressure is greater than about 100,000 psi .
7. The method according to claim 1, wherein the ultra-high pressure is greater than about 125,000 psi.
8. A method according to claim 3, wherein the step of instantaneously increasing the temperature is achieved by applying the ultra-high pressure.
9. A method according to claim 8, wherein the ultra-high pressure is applied hydrostatically.
10. A method according to claim l, wherein the food product is a low acid food.
PCT/IB1996/001500 1995-12-14 1996-12-02 High temperature/ultra-high pressure sterilization of low acid foods WO1997021361A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BR9611951-9A BR9611951A (en) 1995-12-14 1996-12-02 High temperature / ultra-high pressure sterilization of low acid foods.
DE69628032T DE69628032T2 (en) 1995-12-14 1996-12-02 HIGH-TEMPERATURE / ULTRA-HIGH PRESSURE STERILIZATION OF FOODS WITH LOW ACIDITY
DK96945769T DK0866667T3 (en) 1995-12-14 1996-12-02 High temperature / ultra high pressure sterilization of low acid foods
JP52190097A JP3672931B2 (en) 1995-12-14 1996-12-02 High-temperature / ultra-high pressure sterilization of low acid foods
EP96945769A EP0866667B1 (en) 1995-12-14 1996-12-02 High temperature/ultra-high pressure sterilization of low acid foods
CA002239291A CA2239291C (en) 1995-12-14 1996-12-02 High temperature/ultra-high pressure sterilization of low acid foods
AU18067/97A AU711708B2 (en) 1995-12-14 1996-12-02 High temperature/ultra-high pressure sterilization of low acid foods
AT96945769T ATE239387T1 (en) 1995-12-14 1996-12-02 HIGH TEMPERATURE/ULTRA HIGH PRESSURE STERILIZATION OF LOW ACID FOOD

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/572,656 1995-12-14
US08/572,656 US6086936A (en) 1995-12-14 1995-12-14 High temperature/ultra-high pressure sterilization of foods

Publications (2)

Publication Number Publication Date
WO1997021361A1 WO1997021361A1 (en) 1997-06-19
WO1997021361B1 true WO1997021361B1 (en) 1997-08-07

Family

ID=24288795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1996/001500 WO1997021361A1 (en) 1995-12-14 1996-12-02 High temperature/ultra-high pressure sterilization of low acid foods

Country Status (13)

Country Link
US (2) US6086936A (en)
EP (2) EP0866667B1 (en)
JP (1) JP3672931B2 (en)
AT (1) ATE239387T1 (en)
AU (1) AU711708B2 (en)
BR (1) BR9611951A (en)
CA (1) CA2239291C (en)
DE (1) DE69628032T2 (en)
DK (1) DK0866667T3 (en)
ES (1) ES2198507T3 (en)
PT (1) PT866667E (en)
RU (1) RU2174361C2 (en)
WO (1) WO1997021361A1 (en)

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