US4242226A
Expired / Lapsed
US
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Filter material and a method of manufacturing and using the same
Assignee: Individual
•
Filing: 1979-02-21
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Granted: 1980-12-30
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Expires: 1999-02-21
Abstract
Abstract A filter material by which substances contained in gaseous or liquid media can be removed comprises a product in the form of a matrix of activated carbon. The product has uniformly dispersed therein at least one metal taken from the group Ca, Mg, Ba, Al, Cu, and the transition metals and is obtained by chemically reacting cations which comprise at least one of said metals from said group with anionic groups chemically bound to a polyhexose derivative.
Inventors
- 👤 Matti J. Siren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:32
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/02; B01D39/06; A; A24; A24D; A24D3/00; A24D3/06; A24D3/16; A24D3/163; C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/342; C01B32/348
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
84 words
A filter material for filtering gaseous or liquid media, comprising a product in the form of a matrix of activated carbon having uniformly dispersed therein at least one metal selected from the group consisting of Ca, Mg, Ba, Al, Cu and the transition metals, said product formed by chemical reaction between cations of at least one metal from said group of metals and anionic groups chemically bound to a substance consisting essentially of a polyhexose derivative followed by pyrolysis and activation of said product.
Claim 2
Dependent Claim
84 words
A filter material for filtering gaseous or liquid media, comprising a product in the form of a matrix of activated carbon having uniformly dispersed therein at least one metal selected from the group consisting of Ca, Mg, Ba, Al, Cu and the transition metals, said product formed by chemical reaction between cations of at least one metal from said group of metals and anionic groups chemically bound to a substance consisting essentially of a polyhexose derivative followed by pyrolysis and activation of said product.
Claim 3
Dependent Claim
34 words
A filter material according to claim 1, wherein the activated carbon in said product originates from the pyrolysation and activation of a cellulose derivative or starch derivative which has been reacted with said cations.
Claim 4
Dependent Claim
29 words
A filter material according to claim 1, or 2, wherein the anionic groups chemically bound to said polyhexose derivative are carboxyl groups, sulphonic acid groups or phosphoric acid groups.
Claim 5
Dependent Claim
23 words
A filter material according to claims 1 or 2, wherein said polyhexose derivative has introduced therein from 1-3 metal cations per hexose unit.
Claim 6
Dependent Claim
38 words
A filter material according to claims 1 or 2, wherein said polyhexose derivative originates from a polyhexose or a derivative thereof which has been cross-linked with the aid of a bifunctional compound to from a porous three-dimensional network.
Claim 7
Dependent Claim
23 words
A filter material according to claim 5, wherein that said cross-linked polyhexose or polyhexose derivative has a swellability in water of 1-50 ml/gram.
Claim 8
Dependent Claim
28 words
A filter material according to claims 1 or 2, wherein said product contains from about 10-35 percent by weight of a metal selected from said group of metals.
Claim 9
Dependent Claim
21 words
A filter material according to claims 1 -or 2, wherein said product contains at least about 10 percent by weight Ca.
Claim 10
Dependent Claim
22 words
A filter material according to claim 8, wherein the product contains Ca in an amount of at least 15 percent by weight.
Claim 11
Dependent Claim
28 words
A filter material according to claim 8, wherein said product contains at least one of Fe and Cu in a quantity of at least one-tenth of the Ca-content.
Claim 12
Dependent Claim
57 words
A filter material according to claims 1 or 2, wherein at least 10 percent by weight of the amount of metal present in said product comprises at least one of the metals Cu, Ti, V, Cr, Fe, Co, Ni, Mo and Pd, and the remainder comprises at least one of the metals Ca, Mg, Ba and Al.
Claim 13
Dependent Claim
25 words
A filter material according to claims 1 or 2, wherein the metal dispersed therein is selected from the group consisting of Ca, Mg and Zr.
Claim 14
Dependent Claim
12 words
A filter material according to claims 1 or 2, in granular form.
Claim 15
Dependent Claim
18 words
A filter material according to claim 13 wherein the granules are coated with a permeable or semipermeable coating.
Claim 16
Dependent Claim
13 words
The filter material according to claim 1 in combination with an inert filler.
Claim 17
Dependent Claim
10 words
A filter containing a filter material according to claim 1.
Claim 18
Independent Claim
77 words
A method of manufacturing a filter material for filtering gaseous or liquid media, comprising the steps of reacting cations of at least one metal selected from the group consisting of Ca, Mg, Ba, Al, Cu and the transition metals with anionic groups chemically bound to a substance consisting essentially of a polyhexose derivative; separating the reaction product; and pyrolysing and activating the reaction product to form a matrix of activated carbon having the metal uniformly dispersed therein.
Claim 19
Independent Claim
77 words
A method of manufacturing a filter material for filtering gaseous or liquid media, comprising the steps of reacting cations of at least one metal selected from the group consisting of Ca, Mg, Ba, Al, Cu and the transition metals with anionic groups chemically bound to a substance consisting essentially of a polyhexose derivative; separating the reaction product; and pyrolysing and activating the reaction product to form a matrix of activated carbon having the metal uniformly dispersed therein.
Claim 20
Dependent Claim
18 words
A method according to claim 17, wherein cellulose or starch comprise the starting material for said polyhexose derivative.
Claim 21
Dependent Claim
28 words
A method according to claim 17 or 18, wherein the anionic groups chemically bound to said polyhexose derivative are carboxyl groups, sulphonic acid groups or phosphoric acid groups.
Claim 22
Independent Claim
20 words
A method according to claims 17 or 18, wherein the polyhexose derivative contains from 1-3 metal ions per hexose unit.
Claim 23
Independent Claim
37 words
A method according to claims 17 or 18, wherein the polyhexose derivative originates from a polyhexose or a polyhexose derivative which has been cross-linked with the aid of a bifunctional compound to form a porous three-dimensional network.
Claim 24
Dependent Claim
22 words
A method according to claim 21, wherein cross-linked polyhexose or cross-linked polyhexose derivative has a swellability in water of from 1-50 ml/gram.
Claim 25
Independent Claim
22 words
A method according to claims 17 or 18, wherein approximately 10-35 percent by weight of the metal is introduced into said product.
Claim 26
Independent Claim
34 words
A method according to claims 17 or 18, wherein calcium cations are used in a quantity so that the amount of Ca present in said product is at least about 10 percent by weight.
Claim 27
Dependent Claim
21 words
A method according to claim 24 wherein the product contains Ca in an amount of at least 15 percent by weight.
Claim 28
Dependent Claim
34 words
A method according to claim 24, comprising also reacting at least one of Fe and Cu-cations in an amount so that the amount present in said product is at least one-tenth of the Ca-content.
Claim 29
Independent Claim
62 words
A method according to claims 17 or 18, wherein said cations are selected so that at least 10 percent by weight of the amount of metal present in said product comprises at least one of the metals Cu, Ti, V, Cr, Fe, Co, Ni, Mo and Pd, and the remainder comprises at least one of the metals Ca, Mg, Ba and Al.
Claim 30
Independent Claim
22 words
A method according to claims 17 or 18, wherein reacting cations comprise at least one of the metals Ca, Mg and Zr.
Claim 31
Independent Claim
21 words
A method according to claims 17 or 18, further comprising the step of granulating said product prior to pyrolysis and activation.
Claim 32
Dependent Claim
23 words
A method according to claim 29 further comprising the step of coating the granules with a permeable or semipermeable coating subsequent to pyrolysis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |