Process for sorbing liquids using tropical fibers

• US 6,027,652 A
• Filed: 04/04/1997
• Issued: 02/22/2000
• Est. Priority Date: 04/04/1997
• Status: Expired due to Fees

• Current Assignee: Josephine Valley
• Original Assignee: FyBx Environmental, Inc.
• Inventors: Hondroulis, Dimitrios George, Ratowsky, Ian Paul, Kingham, Neville William, Bergquist-Kingham, Katherine Tracy
• Primary Examiner(s): CINTINS, IVARS C
• Application Number:
  US08/832,753
• Time in Patent Office: 1,054 Days
• Field of Search: 210/671, 210/680, 210/691, 210/242.4, 210/282, 210/924
• US Class Current: 210/671
• CPC Class Codes: B01J 20/22 comprising organic material
• CPC Class Codes: B01J 20/28023 Fibres or filaments fibres or filaments in the form of membranes B01J20/28038; B01J20/28007 takes precedence
• CPC Class Codes: B01J 2220/485 Plants or land vegetals, e.g. cereals, wheat, corn, rice, sphagnum, peat moss
• CPC Class Codes: C02F 1/681 by addition of solid materials for removing an oily layer on water
• CPC Class Codes: C09K 3/32 for absorbing liquids to remove pollution, e.g. oil, gasoline, fat
• CPC Class Codes: Y10S 210/924 using physical agent, e.g. sponge, mop

Abstract

A process is described for using tropical fibers to recover spilled oil, gasoline, kerosene, hydrocarbons, pentachlorophenol, creosote or other hazardous liquids from land or water. The sorbent fiber material is produced from agricultural byproducts from cultivation of banana, plantain, cavendish plant, pineapple, coconut, palm, or other tropical fruit bearing plants. The sorbent fibers are produced by separating the raw plant materials; washing the separated fibers in a solution of 1% alum; pressing the fibers to extract liquids and natural juices; further separating the fibers by beating or agitating; and drying the fibers. The sorbent fibers have a water and natural liquid content of less than 10% by weight and may be applied to the surface or periphery of an oil or chemical spill, whereupon they will sorb the oil or chemical. Once the oil or chemical is sorbed the fibers may be collected and the oil or chemical may be partially recovered by compressing the fibers. The fibers may be disposed of by landfilling or may be thermally treated. When thermally treated in a boiler or furnace, the liquid laden fibers may also be a valuable source of fuel.

Claims

1. A process for sorbing a hydrophobic liquid comprising the steps of:

providing a plurality of washed fibers originating from a tropical plant material having naturally hydrophobic fibers, wherein said washed fibers have been washed in a 1% alum solution to extract a portion of naturally occurring water and latex to improve the hydrophobic absorptivity of said fibers;

applying said plurality of washed fibers to a body containing the hydrophobic liquid; and

sorbing the hydrophobic liquid from the body with said plurality of washed fibers.

2. The process of claim 1, wherein said plurality of washed fibers has a water and natural liquid content not greater than 30% by weight.

3. The process of claim 1, wherein said plurality of washed fibers has a water content not greater than 10% by weight.

4. The process of claim 1, wherein said plurality of washed fibers originate from a tropical plant material selected from the group consisting of:

banana stalks, plantain stalks, cavendish plant stalks, pineapple crowns, coconut fronds, palmetto fronds and palm fronds.

5. The process of claim 1, wherein said applying step includes the step of applying said plurality of washed fibers to a body of water containing said hydrophobic liquid.

6. The process of claim 1, wherein said applying step includes the step of applying said plurality of washed fibers to a semi-solid body contaminated with said hydrophobic liquid.

7. The process of claim 6, further comprising the step of allowing said plurality of washed fibers to biodegrade while in contact with the semi-solid body, thereby enhancing biodegradation of said hydrophobic liquid and decreasing the time required for said hydrophobic liquid to degrade.

8. The process of claim 1, wherein said applying step includes the step of applying said washed fibers as a filtration medium through which the body containing the hydrophobic liquid is passed.

9. The process of claim 1, further comprising the step of collecting the plurality of washed fibers following sorption of the hydrophobic liquid.

10. The process of claim 9, further comprising the step of disposing of the plurality of washed fibers.

11. The process of claim 1, further comprising the step of recovering the hydrophobic liquid from the plurality of washed fibers.

12. The process of claim 11, wherein said liquid recovering step includes the step of compressing said plurality of washed fibers.

13. A process for sorbing a liquid using a plurality of fibers originating from a naturally hydrophobic tropical plant material, wherein said tropical plant material also has a high content of natural juices, said process comprising the steps of:

reducing the naturally hydrophobic tropical plant material to a plurality of separated natural fibers;

washing the plurality of separated natural fibers in a 1% alum solution to remove a portion of naturally occurring water and latex from said plurality of separated natural fibers to improve the hydrophobic absorptivity of said fibers;

drying said plurality of washed natural fibers;

applying said plurality of dried, washed natural fibers to a body containing the hydrophobic liquid; and

sorbing the hydrophobic liquid from the body with said plurality of dried, washed natural fibers.

14. The process of claim 13, further comprising the step of packaging said plurality of dried, washed natural fibers.

15. The process of claim 13, further comprising the step of compressing said plurality of dried, washed natural fibers into a solid mass subsequent to said drying step.

16. The process of claim 13, further comprising the step of collecting said plurality of dried, washed natural fibers subsequent to said sorbing step.

17. The process of claim 13, further comprising the step of recovering the hydrophobic liquid subsequent to said sorbing step, wherein said recovering step includes the step of compressing said plurality of dried, washed natural fibers.

18. The process of claim 13, further comprising the step of disposing of said plurality of dried, washed natural fibers by thermal treatment subsequent to said sorbing step.