Claims
- 1. A method for the absorption of a liquid comprising contacting a liquid with a particulate absorbent, said particulate absorbent comprising particles selected from the group consisting of particles of glass-like polysaccharides, said particles:
having a size of up to 620 Φm; being at least 70% by weight of a glass-like type structure; and being:
30 to 45% by weight of a size comprised between 620 and 420 Φm; 35 to 55% by weight of a size comprised between 420 and 210 Φm; and 5 to 25% by weight of a size up to 210 Φm.
- 2. A method according to claim 1 wherein said glass-like polysaccharides are derived from starch by gelatinization.
- 3. A method according to claim 2 wherein said starch has a granulate size ranging from 25 to 40 Φm.
- 4. A method according to claim 3 wherein said starch is a grade A wheat starch.
- 5. A method according to claim 4 wherein said glass-like starch comprises:
from 33 to 40 weight per cent of carbon; from 53 to 59 weight per cent of oxygen; from 6.6 to 7.5 weight per cent of hydrogen; less than 0.15 weight per cent of sulphur; less than 0.6 weight per cent of chloride; and residuals, the weight per cent being expressed by total weight of said glass-like starch.
- 6. A method according to claim 5 wherein said glass-like starch comprises up to 3, molecules of water for each monomer unit of the glass-like starch.
- 7. A method according to claim 6, wherein said glass-like starch is characterized by 3 (three) intensive infrared bands respectively at:
1649±5 cm Γ1; 3446±5 cm Γ1; and 3504±5 cm Γ1, said bands being characteristic of the presence of water in the polymeric structure.
- 8. A method according to claim 1 wherein the particles of the glass-like polysaccharide have a size ranging from 5 to 500 Φm.
- 9. A method according to claim 8 with the particles size of about 300 Φm.
- 10. A method for the absorption of a liquid comprising contacting a liquid with a particulate absorbent, said particulate absorbent comprising particles of glass-like polysaccharides wherein said particles have a size of up to 620 Φm.
- 11. A method according to claim 10 wherein said particles are at least 70% by weight of a glass-like type structure.
- 12. A method according to claim 10 wherein the particles have a size in the range of from 5 to 500 Φm.
- 13. A method for the absorption of a liquid comprising contacting a liquid with an absorbent combination, said absorbent combination comprising a particulate absorbent as defined in claim 10 with a carrier.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2,271,425 |
May 1999 |
CA |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of U.S. patent application Ser. No. 09/569,275 filed May 11, 2000.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09569275 |
May 2000 |
US |
Child |
10115412 |
Apr 2002 |
US |