Patent US4025705A successfully refreshed from Google Patents.
US4025705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insoluble adsorber resin suitable for treating drinking water and sewage
Assignee: Bayer AG
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Filing: 1975-10-20
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Granted: 1977-05-24
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Expires: 1995-10-20
Abstract
Abstract The invention relates to a process for removing oleophilic odor- and tasteproducing substances from water by treating the water with an insoluble, macroporous adsorber resin comprising a matrix based on a crosslinked organic polymer containing aromatic nuclei, the polymer containing chloromethyl groups as substituents; some of the chlorine atoms in the chlormethyl groups can be reacted with ammonia or amines; furthermore, the invention relates to the adsorber resins to be used in the claimed process.
Inventors
- 👤 Herbert Corte
- 👤 Harold Heller
- 👤 Michael Lange
- 👤 Otto Netz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/286; B; B01; B01J; B01J20/00; B01J20/22; C02; C02F; C02F1/00; C02F1/28; C02F1/285; C08J2325/00; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/916
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
An insoluble adsorber resin comprising a matrix based on a crosslinked organic polymer containing aromatic nuclei, in which the polymer is substituted by 0.05 to 1.2 chlormethyl groups per aromatic nucleus and the chlorine in the chlormethyl group is partially reacted with ammonia or an amine to form aminomethyl groups, the ratio of the resulting aminomethyl groups to the chlormethyl groups being in the range of from 5:95 to 80:20.
Claim 2
Dependent Claim
70 words
An insoluble adsorber resin comprising a matrix based on a crosslinked organic polymer containing aromatic nuclei, in which the polymer is substituted by 0.05 to 1.2 chlormethyl groups per aromatic nucleus and the chlorine in the chlormethyl group is partially reacted with ammonia or an amine to form aminomethyl groups, the ratio of the resulting aminomethyl groups to the chlormethyl groups being in the range of from 5:95 to 80:20.
Claim 3
Dependent Claim
26 words
The resin as claimed in claim 1, in which the polymer is a copolymer of an aromatic monovinyl compound and at least one aromatic polyvinyl compound.
Claim 4
Dependent Claim
17 words
The resin as claimed in claim 1, having a porosity of from 20 to 80% by volume.
Claim 5
Dependent Claim
19 words
The resin as claimed in claim 1, having an active surface of from 10 to 1000 m 2 /g.
Claim 6
Dependent Claim
29 words
The resin as claimed in claim 1, in which the ratio of the resulting aminomethyl groups to the chloromethyl groups is in the range of from 5:95 to 60:40.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |