US4070287A — Polymeric and cellulosic fiber material for remov…

Claim 1

Independent Claim 139 words

Sorbent material preferentially sorptive of liquid hydrocarbons over an aqueous liquid comprising a blend of: a. from about 25% to about 90% by weight of polymeric fibers, said fibers being less than about 40 microns in diameter and being of a material selected from the group consisting of polyethylene, polypropylene, polystyrene, polycarbonate, polyester, polyethylene terephthalate, poly(4-methyl-pentene-1), poly(tetramethyleneterephthalate); b. from about 5% to about 70% by weight of cellulosic fibers, said cellulosic fibers comprising: i. at least about 25% unsized cellulosic fibers; ii. at least about 25% cellulosic fibers sized with a water repellent material; c. from about 5% to about 15% of a binding agent capable of bonding the fibers together and not deleteriously affected by water or the liquid hydrocarbon to be sorbed; said sorbent material having a density no greater than about ten pounds per cubic foot.

Claim 2

Dependent Claim 139 words

Sorbent material preferentially sorptive of liquid hydrocarbons over an aqueous liquid comprising a blend of: a. from about 25% to about 90% by weight of polymeric fibers, said fibers being less than about 40 microns in diameter and being of a material selected from the group consisting of polyethylene, polypropylene, polystyrene, polycarbonate, polyester, polyethylene terephthalate, poly(4-methyl-pentene-1), poly(tetramethyleneterephthalate); b. from about 5% to about 70% by weight of cellulosic fibers, said cellulosic fibers comprising: i. at least about 25% unsized cellulosic fibers; ii. at least about 25% cellulosic fibers sized with a water repellent material; c. from about 5% to about 15% of a binding agent capable of bonding the fibers together and not deleteriously affected by water or the liquid hydrocarbon to be sorbed; said sorbent material having a density no greater than about ten pounds per cubic foot.

Claim 3

Dependent Claim 134 words

Sorbent structure comprising in an enclosure a sorbent material preferentially sorptive of liquid hydrocarbons over aqueous liquid comprising a blend of: a. from about 25% to about 95% by weight of polymeric fibers, said fibers being less than about 40 mircons in diameter and being of a material selected from the group consisting of polyethylene, polypropylene, polystyrene, polycarbonate, polyester, polyethylene terephthalate, poly(4-methyl-pentene-1), poly(tetramethylene-terephthalate); b. from about 5% to about 75% by weight of cellulosic fibers, said cellulosic fibers comprising: i. at least about 25% unsized cellulosic fibers; ii. at least about 25% cellulosic fibers sized with a water repellent material; said blend being contained in a fine mesh net-like enclosure, the size of the mesh being great enough to permit flow of liquid therethrough and being fine enough to retain said fiber blend therein.

Claim 4

Dependent Claim 134 words

Sorbent structure comprising in an enclosure a sorbent material preferentially sorptive of liquid hydrocarbons over aqueous liquid comprising a blend of: a. from about 25% to about 95% by weight of polymeric fibers, said fibers being less than about 40 mircons in diameter and being of a material selected from the group consisting of polyethylene, polypropylene, polystyrene, polycarbonate, polyester, polyethylene terephthalate, poly(4-methyl-pentene-1), poly(tetramethylene-terephthalate); b. from about 5% to about 75% by weight of cellulosic fibers, said cellulosic fibers comprising: i. at least about 25% unsized cellulosic fibers; ii. at least about 25% cellulosic fibers sized with a water repellent material; said blend being contained in a fine mesh net-like enclosure, the size of the mesh being great enough to permit flow of liquid therethrough and being fine enough to retain said fiber blend therein.

Claim 5

Dependent Claim 21 words

The sorbent structure of claim 2 wherein the sorbent material further includes from about 5% to about 15% by weight binder.

Claim 6

Dependent Claim 77 words

A process for preferentially sorbing liquid hydrocarbons from an aqueous liquid comprising: a. contacting said liquid hydrocarbon with sorbent material, said sorbent material comprising a blend of from about 25% to about 95% by weight polymeric fiber and from about 5% to about 75% by weight cellulosic fiber said material having a density no greater than about ten pounds per cubic foot; and b. separating the sorbent material with the sorbed liquid hydrocarbon from the aqueous liquid.

Claim 7

Dependent Claim 77 words

A process for preferentially sorbing liquid hydrocarbons from an aqueous liquid comprising: a. contacting said liquid hydrocarbon with sorbent material, said sorbent material comprising a blend of from about 25% to about 95% by weight polymeric fiber and from about 5% to about 75% by weight cellulosic fiber said material having a density no greater than about ten pounds per cubic foot; and b. separating the sorbent material with the sorbed liquid hydrocarbon from the aqueous liquid.

Claim 8

Dependent Claim 19 words

The process of claim 4 wherein the polymeric fiber and cellulosic fiber blend is bonded into a mat-like structure.

Claim 9

Dependent Claim 23 words

The process of claim 4 wherein the polymeric fiber is from the group consisting of aromatic and aliphatic polyolefins, polyesters and combinations thereof.

Claim 10

Dependent Claim 42 words

The process of claim 4 wherein the cellulosic fiber is from the group consisting of sulfite wood fiber, fiberized wood wastes, screenings, cotton linters, kraft pulp, kraft waste, newsprint, diaper waste, and defibrated raw jackpine and aspen wood fiber and combinations thereof.

Claim 11

Dependent Claim 12 words

The process of claim 4 wherein the polymeric fibers comprise foam fibers.

Claim 12

Dependent Claim 21 words

The process of claim 4 wherein at least about 25% of the cellulosic fibers are sized with a water repellent material.

Claim 13

Dependent Claim 17 words

The process of claim 4 wherein at least about 25% of the cellulosic fibers are not sized.

Claim 14

Dependent Claim 18 words

The process of claim 4 further including from about 5% to about 15% by weight of a binder.

Claim 15

Independent Claim 63 words

A method of removing a liquid hydrocarbon from the surface of an aqueous body comprising: a. contacting the liquid hydrocarbon with a sorbent material said sorbent material comprising from about 25% to about 95% by weight polymeric fiber and from about 5% to about 75% by weight cellulosic fiber; b. separating the sorbent material with the sorbed hydrocarbon liquid from the aqueous liquid.

Claim 16

Independent Claim 63 words

A method of removing a liquid hydrocarbon from the surface of an aqueous body comprising: a. contacting the liquid hydrocarbon with a sorbent material said sorbent material comprising from about 25% to about 95% by weight polymeric fiber and from about 5% to about 75% by weight cellulosic fiber; b. separating the sorbent material with the sorbed hydrocarbon liquid from the aqueous liquid.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-01-23	1981-07-25	1982-01-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-01-23	1985-07-25	1986-01-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-01-23	1989-07-25	1990-01-24	$7700.00	Window Closed / Lapsed

Polymeric and cellulosic fiber material for removing oil from water

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag