Highly refined fiber mass, process of their manufacture and products containing the fibers

• US 8,591,982 B2
• Filed: 08/16/2005
• Issued: 11/26/2013
• Est. Priority Date: 11/06/2002
• Status: Active Grant

• Current Assignee: Fiberstar Incorporated
• Original Assignee: Fiberstar Bio-Ingredient Technologies, Inc.
• Inventors: Lundberg, Brock, Lindquist, Dale C.
• Primary Examiner(s): Chawla, Jyoti
• Application Number:
  US11/204,895
• Publication Number:
  US 20050274469A1
• Time in Patent Office: 3,024 Days
• Field of Search: 426/615, 426/616
• US Class Current: 426/615
• CPC Class Codes: A23L 29/262 Cellulose; Derivatives thereof, e.g. ethers
• CPC Class Codes: A23L 33/24 Cellulose or derivatives thereof
• CPC Class Codes: D21C 3/02 with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
• CPC Class Codes: D21C 9/18 De-watering de-watering in general F26B; Elimination of cooking or pulp-treating liquors from the pulpD21C9/002, D21C9/02 take precedence; paper-making machines D21F; strainers in digesters D21C7/00; presses in general B30B

Abstract

The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material from primarily parenchymal cell wall structures in an aqueous solution which need not contain an agent to modify the fiber (e.g., a mild alkalizing or alkaline agent and/or solution) using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume. The mass is dried to produce the HRC fiber. The HRC fiber displays a water retention capacity of about 25 to at least about 56 g H₂O/g dry HRC and retains moisture under conditions that are ordinarily used to remove moisture from materials. The highly refined fiber product can also provide excellent thickening properties and can be used in a wide variety of materials, including edible materials.

Claims

1. A process of rehydrating a highly refined cellulose product comprising microfibers derived from organic fiber citrus plant mass comprising at least 30% by weight of fiber mass as parenchymal fiber mass in complete absence of refinement process introduced metal or metallic hydroxides or NaOH soaking, the highly refined cellulose product having a water retention capacity of at least about 20 g H20/g dry highly refined cellulose product wherein the highly refined cellulose product is rehydrated to a level of less than 60 g H20/g fiber mass.

2. The process of claim 1 wherein the highly refined cellulose product is rehydrated to a level of less than 30 g H₂O/g fiber mass.

3. The process of claim 1 wherein the highly refined cellulose product is rehydrated to a level of less than 20 g H₂O/g fiber mass.

4. The process of claim 1 wherein the amount of rehydration performed adjusts the functionalities of the product within a target range of at least one property selected from the group consisting of water holding capacity, oil holding capacity, and viscosity.

5. The process of claim 1 wherein rehydrating includes the use of a high shear mixer to rapidly disperse organic fiber plant mass materials in a solution.

6. The process of claim 1, wherein rehydrating includes soaking the dry materials in a solution with or without gentle agitation.

7. The process of claim 1 wherein the highly refined cellulose product comprises microfibers derived from organic plant mass comprising at least 30% by weight of all fiber mass as parenchymal fiber mass, the highly refined cellulose product displaying a viscosity at a 1% weight concentration in water at 1 revolution per minute of at least 20,000 centipoise at 20°

C.

8. A method for refining high parenchymal cellulosic fiber mass material from comprising:

soaking raw material from organic fiber plant mass comprising at least 30% by weight of fiber mass as parenchymal fiber mass in an aqueous solution in complete absence of refinement process introduced metal or metallic hydroxides;

draining the raw material and allowing the raw material to sit for sufficient time to enable cells in the raw material to open cells and expand the raw material, the soaking producing soaked raw materials;

exercising shear of at least 10,000 sec−

1 on the soaked raw material to produce refined material; and

,

without a bleaching step, drying the soaked raw material by a process comprising at least one of fluid bed drying and flash drying to form a dried product.

9. A method of making a bakery product by adding at least 1% by weight of the dried product of claim 8 to the bakery product before baking the bakery product and then baking the bakery product.

10. A method of enhancing the stability of a bakery product comprising adding from 1% to 10% by weight of the dried product of claim 8 to the bakery product prior to baking and then baking the bakery product before baking the bakery product and then baking the bakery product.

11. A method of drying an expanded cellulose product comprising:

providing a first mass of expanded, sheared cellulose fiber product which is free of refinement process introduced metal or metallic hydroxides and comprises at least 30% by weight of fiber mass as parenchymal fiber mass having parenchymal cell wall structures having a first moisture content as a weight of water per weight of fiber solids;

providing a second mass of expanded, sheared cellulose fiber product which is free of refinement process introduced metal or metallic hydroxides and comprises at least 30% by weight of fiber mass as parenchymal fiber mass having a second moisture content as a weight of water per weight of fiber solids, the second moisture content being at least 20% less than said first moisture content;

combining said first mass of expanded;

sheared cellulose fiber product and said second mass of expanded, sheared cellulose product to form a combined mass;

drying said combined mass in a drying environment to form a dried combined mass which is a dried powder redispersible in water.

12. The method of claim 11 wherein the drying environment is selected from the group consisting of flash driers fluid bed driers and combinations thereof.

13. The method of claim 11 wherein said dried combined mass is dried to a moisture content of less than 20 H₂O/g fiber mass.

14. The method of claim 13 wherein the drying environment is selected from the group consisting of flash driers, fluid bed driers and combinations thereof.

15. A method of making an expanded fiber mass material friable so that it can be dried in a convective style dryer, the process comprising

providing a first mass of moist, fiber material which is free of refinement process introduced metal or metallic hydroxides and comprises at least 30% by weight of fiber mass as parenchymal fiber mass having a first moisture content and providing a second mass of moist fiber material which is free of refinement process introduced metal or metallic hydroxides and comprises at least 30% by weight of fiber mass as parenchymal fiber mass having a second moisture content that is at least 10% less than the moisture content of the first mass of moist fiber material as measured in g H20/g fiber solids;

combining the first mass and the second mass to form a combined high parenchymal content fiber mass;

providing the combined mass within a drying environment; and

drying the combined mass to improve the drying rate of the first mass of moist fiber in forming a dried fiber mass which is a dried powder redispersible in water.

16. The method of claim 15 wherein a mixer mixes the first mass of moist fiber with the second mass of moist fiber.

17. The method of claim 15 wherein the second mass of moist fiber has less than 20% H₂O compared to the weight of fiber solids in the second mass of moist fiber.

18. A process of rehydrating a highly refined cellulose product comprising microfibers derived from organic fiber citrus plant mass comprising at least 30% by weight of fiber mass as parenchymal fiber mass which is free of refinement process introduced metal or metallic hydroxides and which is a dried powder redispersible in water, the highly refined cellulose product having a water retention capacity of at least about 20 g H20/g dry highly refined cellulose product wherein the highly refined cellulose product is rehydrated to a level of less than 60 g H20/g fiber mass wherein the organic fiber mass comprises at least 50% by weight of fiber mass from organic products selected from the group consisting of sugar beets, citrus fruit, carrots, grapes, tomatoes, chicory, potatoes, pineapple, apples, and cranberries and wherein at least 80% of the organic mass is derived from fruit and root cells.

19. The process of claim 18 wherein the organic fiber mass comprises at least 50% by weight of fiber mass derived from the group consisting of sugar beets, citrus fruit and grapes.

20. The process of claim 18 wherein the organic fiber mass comprises at least 50% by weight of fiber mass derived from the group consisting of citrus fruit and grapes.