GB871503A - Method of and apparatus for cold sterilisation by means of bactericidal gases - Google Patents
Method of and apparatus for cold sterilisation by means of bactericidal gasesInfo
- Publication number
- GB871503A GB871503A GB21094/57A GB2109457A GB871503A GB 871503 A GB871503 A GB 871503A GB 21094/57 A GB21094/57 A GB 21094/57A GB 2109457 A GB2109457 A GB 2109457A GB 871503 A GB871503 A GB 871503A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- gas
- chamber
- bactericidal
- sterilization
- 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
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
- A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
- A23L3/3409—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
871,503. Sterilizing foodstuffs; sterilization. GEWALT, R., and STEIN, E. July 3, 1957 [July 3, 1956; Jan. 26, 1957], No. 21094/57. Classes 49 and 81(1). Foodstuffs, medical appliances, medicines, sera, &c., are cold sterilized, i.e. sterilized at temperatures where heat alone is not effective, by treatment with bactericidal gases, e.g. alkylene oxides or alkylene imines, in a pressure chamber, the sterilization being effected at a pressure between 3 and 6 atmospheres (gauge) with a mixture of bactericidal gas and a gas having no bactericidal or sterilizing effect at atmospheric pressure, e.g. carbon dioxide. Mixtures of ethylene oxide and carbon dioxide in a weight ratio of from 1: 9 to 1: 25 are specified, sterilization being effected preferably between 20‹ C. and 60‹ C. The materials to be sterilized may be unwrapped or wrapped in plastic foil; the sterilization at superatmospheric pressures of loam wrapped in a polyethylene foil of thickness about 50Á is described as illustrating the sterilizing effects of a mixture of ethylene oxide and carbon dioxide by diffusion through the foil. In Fig. 2 the bactericidal mixture is held under pressure in a cylinder 1 from which it is passed through a pressure-reducing valve 5 to a preheater 6. The gas is led through a check valve 8 to a pressure chamber 10 containing the materials to be sterilized. The chamber 10 has electrical heating means 13, a discharge conduit 14 and a low-pressure manometer 15 connected thereto. Discharged gas is passed to an absorption chamber 17 having in its lower part 19 an absorptive solution for ethylene oxide, e.g. calcium chloride solution. A safety valve 24 is inserted in a conduit 23 leading from the chamber 10 to the absorption chamber 17. During operation thermostats (not shown) regulate the supply of electrical current to heaters 6 and 13, thereby maintaining a gas temperature of between 20‹ C. and 60‹ C. Gas pressure is regulated by valve 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE871503X | 1956-07-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB871503A true GB871503A (en) | 1961-06-28 |
Family
ID=6814021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21094/57A Expired GB871503A (en) | 1956-07-03 | 1957-07-03 | Method of and apparatus for cold sterilisation by means of bactericidal gases |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB871503A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2244919A (en) * | 1990-06-13 | 1991-12-18 | Keymed | Disinfecting apparatus for medical instruments |
-
1957
- 1957-07-03 GB GB21094/57A patent/GB871503A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2244919A (en) * | 1990-06-13 | 1991-12-18 | Keymed | Disinfecting apparatus for medical instruments |
GB2244919B (en) * | 1990-06-13 | 1993-03-31 | Keymed | Disinfecting apparatus for medical instruments |
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