Claims
- 1. A particle having a compacted outer surface comprises fibrous cellulosic material and has a bulk density of about 0.15 to about 0.9 kg. per liter.
- 2. The particle of claim 1 wherein the greatest dimension of said material is less than about 0.25 inch.
- 3. The particle of claim 2 wherein said particle is substantially free of protruding fibrils.
- 4. The particle of claim 1 having a platelet-like shape.
- 5. The particle of claim 1 wherein the ratio of z dimension to x dimension of said particle is from about 0.06:1 to about 0.6:1.
- 6. The particle of claim 5 where said z/x ratio ranges from about 0.15:1 to about 0.5:1.
- 7. The particle of claim 1 wherein the size of said particle ranges from about 0.03 inch to about 0.5 inch.
- 8. The particle of claim 7 wherein said particle size ranges from about 0.6 to about 0.25 inch.
- 9. The particle of claim 1 wherein about 98 weight percent of said particles pass a U.S. Sieve #4 and less than about 0.1 weight percent pass through a U.S. Sieve #18.
- 10. The particle of claim 1 wherein said particle is attrition resistant.
- 11. The particle of claim 10 wherein less than about 2 percent of said particles are attrited during a 1000 mile attrition test to the next smaller U.S. Sieve number.
- 12. The particle of claim 11 wherein said attrition test does not produce a measurable increase in said particles retained on a U.S. Sieve #140 or smaller.
- 13. The particle of claim 1 having a Dust Level Index of about 10 or less.
- 14. The particle of claim 1 wherein said particle remains discrete following wetting.
- 15. The particle of claim 1 wherein the ratio of x-dimension to y-dimension is not greater than about 3:1.
- 16. The particle of claim 4 wherein said particle is generally circular.
- 17. The particle of claim 1 wherein the 24-hour evaporation rate of said particle is about two times that of clay litters.
- 18. The particle of claim 17 wherein the 24-hour aqueous evaporation rate of said particle is at least about 0.0040#/hr.
- 19. The particle of claim 1 wherein said particle is particularly useful of oil sorption in the substantial absence of dust.
- 20. The particle of claim 19 wherein said particle sorbs oil to at least 75 percent of its weight.
- 21. A bed of particles comprising fibrous cellulosic material, said particles having a compacted outer surface and a bulk density of 0.15 to about 0.9 kg. per liter.
- 22. The bed of claim 21 wherein said particles have platelet-like shape.
- 23. The bed of claim 21 wherein the greatest dimension of said material is less than about 0.25 inch.
- 24. The bed of claim 21 wherein said particles are substantially free of protruding fibrils.
- 25. The bed of claim 24 wherein said bed has a Dust Level Index of about 10 or less.
- 26. The bed of claim 21 wherein the ratio of z dimension to x dimension of said particle is from about 0.06:1 to about 0.6:1.
- 27. The bed of claim 26 where said z/x ratio ranges from about 0.15:1 to about 0.5:1.
- 28. The bed of claim 21 wherein the size of said particle ranges from about 0.03 inch to about 0.5 inch.
- 29. The bed of claim 28 wherein said particle size ranges from about 0.6 to about 0.25 inch.
- 30. The bed of claim 21 wherein said particles comprise about 98 weight percent which pass a U.S. Sieve #4 and less than about 0.1 weight percent pass through a U.S. Sieve #18.
- 31. The bed of claim 21 wherein said particles are attrition resistant.
- 32. The bed of claim 31 wherein less than about 2 percent of said particles are attrited during a 1000 mile attrition test to the next smaller U.S. Sieve number.
- 33. The bed of claim 32 wherein said attrition test does not produce a measurable increase in said particles retained on a U.S. Sieve #140 or smaller.
- 34. The bed of claim 21 wherein said particles remain discrete following wetting.
- 35. The bed of claim 21 wherein the ratio of x-dimension to y-dimension is not greater than about 3:1.
- 36. The bed of claim 22 wherein said particles are generally circular.
- 37. The bed of claim 1 wherein the 24-hour evaporation rate of said particles is about two times that of clay litter.
- 38. The bed of claim 19 wherein the 24-hour aqueous evaporation rate of said particles is at least about 0.0040#/hr.
- 39. The bed of particles of claim 21 wherein said bed is as stable as clay litter.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 602,276 filed Apr. 24, 1984 now abandoned, which is a continuation-in-part of application Ser. No. 482,366 filed Apr. 5, 1983, which is a continuation-in-part of Ser. No. 463,100 filed Feb. 2, 1983 now abandoned.
US Referenced Citations (10)
Continuation in Parts (3)
|
Number |
Date |
Country |
Parent |
602276 |
Apr 1984 |
|
Parent |
482366 |
Apr 1983 |
|
Parent |
463100 |
Feb 1983 |
|