GB822580A - Sterilization of particulate material - Google Patents
Sterilization of particulate materialInfo
- Publication number
- GB822580A GB822580A GB10857A GB10857A GB822580A GB 822580 A GB822580 A GB 822580A GB 10857 A GB10857 A GB 10857A GB 10857 A GB10857 A GB 10857A GB 822580 A GB822580 A GB 822580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- epoxide
- water
- free
- maximum amount
- 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
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
- A61L2/206—Ethylene oxide
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A method of sterilizing or partially sterilizing a powder, e.g talc or the like particulate material which is susceptible to undesirable caking upon contact with liquids comprises treating the powder with a lower epoxide having 2-3 carbon atoms in the chain, e.g. propylene oxide in the presence of water. In a preferred method a powder is treated with at least 0.5% of a lower epoxide of two to three carbon atoms in the presence of at least 0.05% of water, based on the weight of the dry powder, at a temperature in the range of about 70 DEG to 120 DEG F., and a time in the range of about 5 hours to 15 days until the powder is sterile, and devoid of free epoxide, the maximum amount of the treating materials remaining in the powder at the end of the treatment being 5% of the epoxide in combined form if the maximum amount of water including both free and combined water is 1%, and 1.5% of the epoxide if the maximum amount of the water is 1.5%, whereby a free-flowing, sterile powder or particulate material of substantially similar particle size is obtained. Where talc of a particle size between 1 and 200 mc. is to be treated the epoxide is preferably propyleneoxide which is added as a liquid and the method is carried out in an isolated zone impermeable to micro-organisms at 100 DEG F., for 14 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB10857A GB822580A (en) | 1957-01-01 | 1957-01-01 | Sterilization of particulate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB10857A GB822580A (en) | 1957-01-01 | 1957-01-01 | Sterilization of particulate material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB822580A true GB822580A (en) | 1959-10-28 |
Family
ID=9698553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10857A Expired GB822580A (en) | 1957-01-01 | 1957-01-01 | Sterilization of particulate material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB822580A (en) |
-
1957
- 1957-01-01 GB GB10857A patent/GB822580A/en not_active Expired
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