US4207184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of industrial effluents
Assignee: BASF Corp
•
Filing: 1978-07-14
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Granted: 1980-06-10
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Expires: 1998-07-14
Abstract
Abstract A process for purifying industrial effluents, wherein said effluents are brought into contact with a polymer adsorption material which is in the form of a solvated, preferably hydrated, gel.
Inventors
- 👤 Leo E. Kaiser
- 👤 Hans Scheidegger
- 👤 Jaroslav Haase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:22
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; C; C02; C02F; C02F1/00; C02F1/28; C02F1/285; C02F1/286; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
66 words
A process for the purification and decolorization of an industrial waste water effluent which comprises contacting said effluent, having a dye concentration of 0.05 to 0.5 g/l, with a polymer adsorption solvated gel material having an average molecular weight greater than 500 and a specific surface area greater than 30 m 2 /g. and said material being a synthetic man-made thermoplastic in the solvated gel state.
Claim 2
Dependent Claim
66 words
A process for the purification and decolorization of an industrial waste water effluent which comprises contacting said effluent, having a dye concentration of 0.05 to 0.5 g/l, with a polymer adsorption solvated gel material having an average molecular weight greater than 500 and a specific surface area greater than 30 m 2 /g. and said material being a synthetic man-made thermoplastic in the solvated gel state.
Claim 3
Dependent Claim
33 words
A process according to claim 1, wherein the effluent is a polluted waste liquor which occurs in the textile, fibre, paper or leather industry or in the manufacture of dyes or fluorescent brighteners.
Claim 4
Dependent Claim
22 words
A process according to claim 1, wherein the effluent is a waste liquor which contains anionic or cationic substances or mixtures thereof.
Claim 5
Dependent Claim
27 words
A process according to claim 1, wherein the effluent contains anionic or cationic dyes, fluorescent brighteners, textile or dyeing assistants, sufactants, tannins, or mixtures of such substances.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein the effluent contains mixtures of anionic or cationic dyes with anionic, cationic or non-ionogenic assistants or non-ionogenic dyes.
Claim 7
Dependent Claim
17 words
A process according to claim 1, wherein the purification is carried out by a solid bed process.
Claim 8
Dependent Claim
20 words
A process according to claim 1, wherein the purification of the effluents is carried out at 0° to 100° C.
Claim 9
Dependent Claim
23 words
A process according to claim 7, wherein the purification of the effluents is carried out at a temperature between 10° and 70° C.
Claim 10
Dependent Claim
16 words
A process according to claim 1, wherein the adsorption material is in a hydrated gel state.
Claim 11
Dependent Claim
18 words
A process according to claim 1, wherein the polymer gels are synthetic fibres obtained by wet spinning processes.
Claim 12
Dependent Claim
34 words
A process according to claim 10, wherein said material consists of synthetic polyamides, anionically modified polyamides, polymeric or copolymeric acrylonitrile, cellulose esters, linear polyesters or acid modified polyester fibres in the solvated gel state.
Claim 13
Dependent Claim
20 words
A process according to claim 11, wherein said material is a polymeric or copolymeric acrylonitrile in the solvated gel state.
Claim 14
Dependent Claim
17 words
A process according to claim 11, wherein said material is synthetic polyamide in the solvated gel state.
Claim 15
Dependent Claim
18 words
A process according to claim 10, wherein the fibres have an individual titre of 0.2 to 20 denier.
Claim 16
Dependent Claim
18 words
A process according to claim 10, wherein the polymer gels are used in the form of spinning cable.
Claim 17
Dependent Claim
22 words
A process according to claim 10, wherein the polymer gels are polymeric or copolymeric acrylonitrile spinning cable in the hydrated gel state.
Claim 18
Dependent Claim
15 words
A process according to claim 1, wherein the polymer gels are used in comminuted form.
Claim 19
Dependent Claim
29 words
A process according to claim 1, wherein the polymer gels are used in the form of cut or broken spinning cable in fibre lengths of 1 to 10 mm.
Claim 20
Dependent Claim
18 words
A process according to claim 1, wherein the polymer gels are used in the form of ground fibres.
Claim 21
Dependent Claim
15 words
A process according to claim 1, wherein the polymer gels are used as fibre webs.
Claim 22
Dependent Claim
15 words
A process according to claim 1, wherein the polymer gels are used as amorphous particles.
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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |