US3646594A
Expired / Lapsed
US
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Process for removal of acidic materials from fluids
Assignee: HEALTH EDUCATION ELFARE USA
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Filing: 1969-06-11
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Granted: 1972-02-29
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Expires: 1989-06-11
Abstract
Abstract A process for removing Acidic Materials especially SO2 from a fluid such as water, waste gases, etc., which removal is achieved by passing said fluid through a shaped article formed from a polyolefin, a polyester or a nylon in admixture with a nitrogencontaining polymer.
Inventors
- 👤 Jack S Lasky
- 👤 Ronald W Fuest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:58
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; B01J; B01J41/00; B01J41/04; B01J41/08; B01J41/12; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60; C02; C02F; C02F1/00; C02F1/28; C02F1/285
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
25 words
A process in accordance with claim 1 wherein said basic nitrogen containing polymer possesses the basic nitrogen in the form of aliphatic tertiary amino groups.
Claim 2
Dependent Claim
19 words
The process of claim 1 in which said shaped article is regenerated in the presence of heat and steam.
Claim 3
Dependent Claim
20 words
The process of claim 1 in which said shaped article is regenerated in the presence of heat and a vacuum.
Claim 4
Dependent Claim
21 words
The process of claim 1 in which said shaped article is regenerated in the presence of heat and an inert gas.
Claim 5
Dependent Claim
16 words
The process of claim 1 in which said shaped article is regenerated using a basic solution.
Claim 6
Dependent Claim
22 words
The process defined in claim 1 in which the matrix polymer is selected from the group consisting of polyethylene, polypropylene, and poly(2-methyl-pentene).
Claim 7
Dependent Claim
23 words
The process defined in claim 1 in which the matrix polymer is selected from the group consisting of polyethylene terephthalate, polyethylene-isophthalate, and polyethylene-(isophthlate-terephthalate).
Claim 8
Dependent Claim
34 words
The process defined in claim 1 in which the matrix polymer is selected from the group consisting of poly(hexamethylene adipamide), poly(hexamethylene sebacamide), poly(caprolactam), and the interpolymer of hexamethylene adipamide, and hexamethylene sebacamide with caprolactam.
Claim 9
Dependent Claim
35 words
The process is in claim 7 in which the nitrogen containing polymer i selected from the group consisting of the (styrene-dimethylaminopropylmaleimide) copolymer, the (styrene-methylvinylether-dimethylaminopropylmaleimide) terpolymer, alkylated polyethyleneimine, the condensation polymer of 2,4-tolylenediisocyanate and N-methyl-bis (aminopropyl)amine.
Claim 10
Dependent Claim
34 words
The process defined in claim 8 in which the nitrogen-containing polymer is selected from the group consisting of the (styrene-dimethylaminopropylmaleimide) copolymer, the (styrene-methylvinylether-dimethylaminopropylmaleimide) terpolymer, alkylated polyethyleneimine, the condensation polymer of 2,4-tolylenediisocyanate and N-methyl-bis(aminopropyl) amine.
Claim 11
Dependent Claim
33 words
The process defined in claim 9 in which the nitrogen-containing polymer is selected from the group consisting of the (styrene-dimethylaminopropylmaleimide) copolymer, the (styrene-methylvinylether-dimethylaminopropylmaleimide) terpolymer, alkylated polyethyleneimine, the condensation polymer of 2,4-tolylenediisocyanate and N-methyl-bis(aminopropyl)-amine.
Claim 12
Dependent Claim
39 words
The process defined in claim 10 in which the shaped article is a fiber containing polypropylene as the matrix polymer between about 10 to 60 percent of the (styrene-dimethylaminopropylmaleimide) copolymer, said percentage based on total weight of the fiber.
Claim 13
Dependent Claim
39 words
The process defined in claim 10 in which the shaped article is a fiber containing polypropylene as the matrix polymer and between about 10 percent and 60 percent of polyethyleneimine, said percentage based upon the total weight of fiber.
Claim 14
Dependent Claim
48 words
The process defined in claim 11 in which the shaped article is a fiber containing poly(ethylene terephthalate) as the matrix polymer and between about 10 percent and 60 percent of the polyurea reaction product of 2,4-tolylene diisocyanate with N-methyl-bis(aminopropyl)amine, said percentage based upon the total weight of fiber.
Claim 15
Dependent Claim
46 words
The process defined in claim 12 in which the shaped article is a fiber containing poly(hexamethylene adipamide) as the matrix polymer and between about 10 percent and 60 percent of the terpolymer of styrene, methylvinylether, and dimethylaminopropylmaleimide, said percentage based upon the total weight of fiber.
Claim 16
Dependent Claim
148 words
A process for the removal of acidic materials from a a fluid medium containing same, comprising: contacting said fluid medium to be treated with a shaped article capable of sorbing said acidic material and prepared from a matrix polymer selected from the group consisting of a polyolefin, a polyester and a polyamide in admixture with between about 5- 20 percent by weight of polymeric compounds containing alkylene glycols and about 5-20 percent by weight of a basic nitrogen containing polymer selected from the group consisting of: a. thermoplastic homopolymers of vinyl-substituted monocyclic and polycyclic pyridine compounds; b. condensation polymers containing tertiary amino groups pendant from the polymer chain; c. condensation polymers containing tertiary amino groups as an integral part of the polymer chain; and d. addition homopolymers and copolymers having pendant amino groups therefrom, resulting in sorption of the acidic materials in said fluid by said shaped article.
Claim 17
Dependent Claim
19 words
The process of claim 1 in which said shaped article is regenerated in the presence of heat and steam.
Claim 18
Dependent Claim
18 words
The process of claim 18 in which the said shaped saturated article is regenerated using heat and steam.
Claim 19
Dependent Claim
16 words
The process of claim 18 in which said shaped article is regenerated using a basic solution.
Claim 20
Dependent Claim
20 words
The process of claim 18 in which said shaped article is regenerated in a vacuum in the presence of heat.
Claim 21
Dependent Claim
21 words
The process of claim 18 in which said shaped article is regenerated in the presence of heat and an inert gas.
Claim 22
Dependent Claim
22 words
The process defined in claim 18 in which the matrix polymer is selected from the group consisting of polyethylene, polypropylene, and poly(2-methyl-pentene).
Claim 23
Dependent Claim
23 words
The process defined in claim 18 in which the matrix polymer is selected from the group consisting of polyethylene terephthalate, polyethylene-isophthalate, and polyethylene(isophthalate-terephthalate).
Claim 24
Dependent Claim
34 words
The process defined in claim 18 in which the matrix polymer is selected from the group consisting of poly(hexamethylene adipamide), poly(hexamethylene sebacamide), poly(caprolactam), and the interpolymer of hexamethylene adipamide, and hexamethylene sebacamide with caprolactam.
Claim 25
Dependent Claim
34 words
The process defined in claim 23 in which the nitrogen containing polymer is selected from the group consisting of the (styrene-dimethylaminopropylmaleimide) copolymer, the (styrene-methylvinylether-dimethylaminopropylmaleimide) terpolymer, alkylated polyethyleneimine, the condensation polymer of 2,4-tolylenediisocyanate and N-methyl-bis(aminopropyl)amine.
Claim 26
Dependent Claim
33 words
The process defined in claim 24 in which the nitrogen-containing polymer is Selected from the group consisting of the (styrene-dimethylaminopropylmaleimide) copolymer, the (styrene-methylvinylether-dimethylaminopropylmaleimide) terpolymer, alkylated polyethyleneimine, the condensation polymer of 2,4-tolylenediisocyanate and N-methyl-bis(aminopropyl)amine.
Claim 27
Dependent Claim
33 words
The process defined in claim 25 in which the nitrogen-containing polymer is selected from the group consisting of the (styrene-dimethylaminopropylmaleimide) copolymer, the (styrene-methylvinylether-dimethylaminopropylmaleimide), terpolymer, alkylated polyethyleneimine, the condensation polymer of 2,4-tolylenediisocyanate and N-methyl-bis(aminopropyl)amine.
Claim 28
Dependent Claim
37 words
The process defined in claim 26 in which the shaped article is a fiber, the matrix polymer is polypropylene, the nitrogen containing polymer is a (styrene-dimethylaminopropylmalemide) copolymer and the polymeric compound containing alkylene glycol is polyethylene glycol.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |