GB812210A - Preservation of food and other perishable materials - Google Patents
Preservation of food and other perishable materialsInfo
- Publication number
- GB812210A GB812210A GB3565556A GB3565556A GB812210A GB 812210 A GB812210 A GB 812210A GB 3565556 A GB3565556 A GB 3565556A GB 3565556 A GB3565556 A GB 3565556A GB 812210 A GB812210 A GB 812210A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitrogen
- air
- liquid
- methane
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title abstract 5
- 238000004321 preservation Methods 0.000 title 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 26
- 229910052757 nitrogen Inorganic materials 0.000 abstract 13
- 239000007788 liquid Substances 0.000 abstract 9
- 238000001816 cooling Methods 0.000 abstract 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 6
- 229910052760 oxygen Inorganic materials 0.000 abstract 5
- 239000001301 oxygen Substances 0.000 abstract 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 4
- 238000001704 evaporation Methods 0.000 abstract 2
- 239000002360 explosive Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/363—Freezing; Subsequent thawing; Cooling the materials not being transported through or in the apparatus with or without shaping, e.g. in form of powder, granules, or flakes
- A23L3/364—Freezing; Subsequent thawing; Cooling the materials not being transported through or in the apparatus with or without shaping, e.g. in form of powder, granules, or flakes with packages or with shaping in form of blocks or portions
Abstract
812,210. Preserving perishable materials. BRITISH OXYGEN CO. Ltd. Oct. 10, 1957 [Nov. 21, 1956], No. 35655/56. Class 49. [Also in Group XIII] Food and other perishable materials, e.g. corpses, are preserved by cooling with liquid air or nitrogen in a thermally-insulated container to below - 50‹ C., e.g. to about - 190‹ C., the liquid air or nitrogen having been liquefied by using liquid methane as refrigerant. In one form of the invention, air or nitrogen is compressed to 15 or 20 atmospheres, cooled to about - 160‹ C. by heat exchange with cold gaseous methane, liquefied by heat exchange with evaporating liquid methane, passed to a storage tank and thence to a thermally-insulated vessel containing food or other perishable material (preferably pre-chilled to about - 5‹ C.) until the desired low temperature is reached. In the form of the invention shown, risk of forming explosive mixtures of air with methane is avoided by cooling air with methane-cooled cooled nitrogen. Air at about 32 atmospheres leaves a compressor 10, is cooled and purified in heat exchanger 11 by a countercurrent stream of cold nitrogen and also any waste gaseous oxygen deriving from column 16, and is liquefied in heat exchanger 12 by heat exchange with liquid nitrogen evaporating at about 5.7 atmospheres. The liquid air may be fed directly through valve 13 into a thermallyinsulated container 14 containing perishable material, or it may be fed through valve 15 to rectification column 16 in which it is separated into fractions of liquid nitrogen and gaseous oxygen, these fractions being used respectively for cooling purposes in container 14 (after storage in vessel 19 if desired) and to assist in cooling air in heat exchangers 11 and 12. Nitrogen leaving exchanger 11 is compressed and cooled and passed through heat exchanger 22 and heating coil 23 by means of which heat is exchanged with evaporated methane in exchanger 22 and heat is supplied to evaporate liquid methane in storage vessel 24, thereby liquefying the nitrogen which is passed to heat exchanger 12. Nitrogen not required for heat exchanger 11 passes via line 26 to a heat exchanger 28 where it serves to cool nitrogen by-passing heat exchanger 22 through line 29. When liquid air is used for cooling purposes in container 14, enrichment of oxygen occurring in the container due to preferential vaporization of nitrogen during the cooling of the food &c. may require that the container after cooling be flushed out with a small amount of gaseous nitrogen to reduce the oxygen content therein. Specification 804,944, [Group XXVIII], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0238037A ES238037A1 (en) | 1956-11-21 | 1957-10-10 | A method of conserving foods or similar materials susceptible to be pounded during their transportation or storage (Machine-translation by Google Translate, not legally binding) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB812210A true GB812210A (en) | 1959-04-22 |
Family
ID=1744351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3565556A Expired GB812210A (en) | 1956-11-21 | 1956-11-21 | Preservation of food and other perishable materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB812210A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1736176A1 (en) * | 2005-06-21 | 2006-12-27 | Philippe Druart | Apparatus for generating ozone in an inert carrier gas |
| DE102011010121A1 (en) * | 2011-02-02 | 2012-08-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Walk-in cooling system, in particular for the cryopreservation of biological samples, and method for their operation |
-
1956
- 1956-11-21 GB GB3565556A patent/GB812210A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1736176A1 (en) * | 2005-06-21 | 2006-12-27 | Philippe Druart | Apparatus for generating ozone in an inert carrier gas |
| DE102011010121A1 (en) * | 2011-02-02 | 2012-08-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Walk-in cooling system, in particular for the cryopreservation of biological samples, and method for their operation |
| WO2012104080A2 (en) | 2011-02-02 | 2012-08-09 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Accessible cooling system, especially for cryopreserving biological samples, and method for the operation thereof |
| DE102011010121B4 (en) * | 2011-02-02 | 2016-09-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Walk-in cooling system, in particular for the cryopreservation of biological samples, and method for their operation |
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