Method for processing a perishable product

• US 5,597,599 A
• Filed: 10/04/1994
• Issued: 01/28/1997
• Est. Priority Date: 09/08/1987
• Status: Expired due to Fees

• Current Assignee: Louisiana State University (Louisiana State University System), Pakor, Inc.
• Original Assignee: Louisiana State University and Agricultural, Pakor, Inc.
• Inventors: Smith, Brian S., McMillin, Kenneth W., Mitchell, Jerry L., Wells, John H., Farr, A. James
• Primary Examiner(s): Tentoni, Leo B.
• Application Number:
  US08/323,439
• Time in Patent Office: 847 Days
• Field of Search: 426/316, 426/320, 426/326, 426/335, 426/392, 426/418, 53/432, 53/434, 53/512
• US Class Current: 426/316
• CPC Class Codes: B01D 11/0203 with a supercritical fluid
• CPC Class Codes: B01D 15/40 using supercritical fluid as mobile phase or eluent
• CPC Class Codes: B65B 31/08 the nozzle being adapted to pierce the container or wrapper
• CPC Class Codes: B65D 81/20 under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas B65D81/28 takes precedence; containers with pressurising means for maintaining ball pressure A63B39/025
• CPC Class Codes: G01N 2030/009 Extraction
• CPC Class Codes: G01N 2030/062 extracting sample from raw material
• CPC Class Codes: G01N 2030/303 using peltier elements
• CPC Class Codes: G01N 2030/326 pumps
• CPC Class Codes: G01N 30/02 Column chromatography

Abstract

A method of preservation and presentation including the steps of positioning a perishable product having a significant porosity and permeability into a gas impermeable package in the presence of a first agent, thereafter sealing the product in the package in the presence of the agent under a positive pressure and maintaining gas communication between the product and the first agent for a time necessary for the concentration of the first agent to be reduced by 50%.

Claims

1. A method for processing a perishable product comprising the steps of:

positioning a perishable product having a high porosity and permeability in a gas impermeable package such that a substantial portion of the product is in gas communication with a selected first agent; and

thereafter sealing such product in said package for a selected resident time such that gas communication with said product and said first agent is maintained, where the type and concentration of said first agent is determined by the compositional characteristics of said product.

2. The method of claim 1 wherein said first agent is drawn from a group consisting of O₃, F₂, H₂ O₂, KMnO₄, HClO, ClO₂, O₂, Br₂ and I₂.

3. The method of claim 2 wherein the resident time for said first agent is defined as the half life, or amount of time necessary for the concentration of the first agent to be reduced to 50% of the initial amount of the first agent.

4. The method of claim 1 where the compositional characteristics include the moisture content, fat content, protein content and ash content of the product.

5. The method of claim 1 wherein the container is sealed so as to maintain a positive pressure inside said container vis-a-vis the exterior of said chamber.

6. The method of claim 5 wherein said positive pressure is greater than that pressure exerted on the exterior to said container but not so great as to significantly increase the density of said product.

7. The method of claim 1 further including the step of introducing a second agent into gas communication with said product so as to effect the appearance, organoleptic and shelf life traits of said product.

8. The method of claim 7 wherein said second agent is introduced as a vapor or an aerosol.

9. The method of claim 7 wherein said second agent is drawn from a group consisting of ascorbic acid, isoascorbic acid, erythorbic acid, lactic acid, citric acid, succinic acid and mixtures of and salts thereof.

10. The method of claim 7 further including the step of introducing yet a third agent into gas communication with said product.

11. The method of claim 10 wherein said third agent is introduced as a vapor or as an aerosol.

12. The method of claim 8 wherein said third agent is drawn from a group consisting of glycerol monolaurate, sodium sorbate, sodium acetate, sodium iodacetate, potassium sorbate, potassium acetate, potassium iodecetate, iodoacetomide and mixtures and acidic solutions thereof.

13. The method of claim 1 further including the step of replacing said first agent with a second agent preliminary to sealing said package.

14. The method of claim 13 wherein said second agent is drawn from a group consisting of nitrogen, oxygen, argon, carbon dioxide, hydrogen, krypton, neon, helium, xenon and mixtures thereof.

15. The method of claim 1 wherein said first agent comprises a mixture of ozone, nitrogen and carbon dioxide so as to induce a chemically stable, cured pigment form in meat, poultry and seafood.

16. A method of processing a perishable product comprising the steps of:

positioning a particulated perishable product having a significant void fraction and a significant permeability therethrough so as to allow for gas communication with a high proportion of the product surface area;

exposing said product to a first agent for a resident time adequate to alter the external appearance, organoleptic or shelf life traits of said product; and

sealing said product in a gas impermeable package with said first agent under a positive pressure.

17. The method of claim 16 wherein said first agent is drawn from a group consisting of O₃, F₂, H₂ O₂, KMnO₄, HClO, ClO₂, O₂, Br₂ and I₂.

18. The method of claim 16 further including the step of introducing a second agent into said sealed package in gas communication with said product.

19. The method of claim 18 wherein said second agent is drawn from the group consisting of ascorbic acid, isoascorbic acid, erythorbic acid, lactic acid, citric acid, succinic acid and mixtures of salts thereof.

20. The method of claim 18 further including the step of introducing yet a third agent into said sealed package into gas communication with said product.

21. The method of claim 20 wherein said third agent is drawn from a group consisting of glycerol monolaurate, sodium sorbate, sodium acetate, sodium iodoacetate, potassium sorbate, potassium acetate, potassium iodoacetate, iodoacetomide and mixtures and acidic solutions thereof.

22. The method of claim 16 further including the step of replacing said first agent with a second agent and thereafter sealing said package with a positive pressure.

23. The method of claim 22 wherein said second agent is drawn from a group consisting of nitrogen, oxygen, argon, carbon dioxide, hydrogen, krypton, neon, helium, xenon and mixtures thereof.

24. A method of processing a perishable product comprising the steps of

positioning a perishable product in a selectively permeable package under a selected pressure;

enclosing said permeable package in a chamber containing a first agent;

creating a higher pressure in said chamber than is present in said package so as to induce said agent in said chamber to diffuse into the package.

25. The method of claim 24 wherein said first agent is drawn from a group consisting of O₃, F₂, H₂ O₂, KMnO₄, HOBr, HClO, O₂, Br₂ and I₂.

26. The method of claim 24 wherein the concentration of the first agent is determined by the moisture content, fat content, protein content or ash content of said product.