US4975199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water reclamation process
Assignee: ROCKY POINT Corp A NV CORPORATION
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Filing: 1989-10-27
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Granted: 1990-12-04
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Expires: 2009-10-27
Abstract
Abstract The invention relates to a process of reclaiming deionized water from waste water contaminated with particulate materials, detergents, biological and/or radioactive materials, comprising the steps of: a. passing the waste water through one or more particulate filters to remove the particulate materials; b. directing the effluent from the particulate filter(s) through a first reverse osmosis filter to generate purified water essentially free of detergents, biological and radioactive contaminants and bypass water contaminated with the impurities removed from the effluent; and c. removing ions from the purified-free water to generate deionized water.
Inventors
- 👤 Stanley Woster
- 👤 John W. DeVore
- 👤 Thomas J. Yurko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:55
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/025; B01D61/026; B01D61/04; C; C02; C02F; C02F1/00; C02F1/44; C02F1/441; B01D2311/00; B01D2311/04; C02F2101/00; C02F2101/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
Process comprising reclaiming improved recoveries of deionized water of up to about more than about 95% from waste water contaminated with particulate materials detergents, biological, and/or radioactive materials, by: a. passing said waste water through one or more particulate filters to remove said particulate materials; b directing the effluent from said particulate filter(s) through a first reverse osmosis filter to generate purified water essentially free of detergents, biological and radioactive contaminants and bypass water contaminated with the impurities removed from said effluent; and c. removing ions from said purified-free water to generate deionized water.
Claim 2
Dependent Claim
31 words
A process according to claim 1, wherein in step b. said particulate materials are removed by passing said waste water through a series of particulate filters of different particulate filter sizes.
Claim 3
Dependent Claim
26 words
A process according to claim 2, wherein the effluent from the last of said particulate filters is substantially free of particulates greater than about 5 microns.
Claim 4
Dependent Claim
29 words
A process according to claim 1, wherein the volume of said contaminated bypass water generated in step b. is less than about 10% of the volume of said effluent.
Claim 5
Dependent Claim
27 words
A process according to claim 4, wherein the volume of said contaminated bypass water generated in step b. is about 5% of the volume of said effluent.
Claim 6
Dependent Claim
53 words
A process according to claim 4, further comprising the steps of: d. directing said contaminated bypass water from step b. through at least one second reverse osmosis filter to generate sludge-containing water and additional purified water essentially free of detergents, biological and radioactive contaminants; and e. recycling said purified water in step c.
Claim 7
Dependent Claim
17 words
A process according to claim 6, further comprising the step of separating sludge from said sludge-containing water.
Claim 8
Dependent Claim
28 words
A process according to claim 1 or claim 6, further comprising the step of subjecting said deionized water to ultra-violet radiation to provide water suitable for medical use.
Claim 9
Dependent Claim
29 words
A process according to claim 8, further comprising the step of using the deionized water obtained by the process according to claim 8 in semiconductor material or device technology.
Claim 10
Dependent Claim
13 words
A process according to claim 1 or claim 6, performed in continuous mode.
Claim 11
Dependent Claim
28 words
A process according to claim 1 or claim 6, wherein in step c. said ions are removed by passing said purified water through cation and anion exchange resins.
Claim 12
Dependent Claim
28 words
A process according to claim 1, further comprising the step of using the deionized water generated by the steps set forth in claim 1 in processing semiconductor material.
Claim 13
Dependent Claim
28 words
The process of claim 1, further comprising the step of using the deionized water obtained by the process of claim 1 in a laundry for cleaning hospital linens.
Claim 14
Dependent Claim
109 words
Process comprising reclaiming improved recoveries of water of up to more than about 95% used in a laundry that washes protective clothing contaminated with radioactive materials, by a. washing said protective clothing in a wash solution containing detergent and deionized water to generate an effluent; b. passing said effluent water through one or more particulate filters to remove particulate materials; c. directing the effluent from said particulate filter(s) through a first reverse osmosis filter to generate purified water essentially free of detergents, biological and radioactive contaminants and bypass water contaminated with the impurities removed from said effluent; and d. removing ions from said purified-free water to generate deionized water.
Claim 15
Dependent Claim
10 words
A process according to claim 14, performed in continuous mode.
Claim 16
Dependent Claim
23 words
A process according to claim 15, further comprising the step of recycling said deionized water generated in step c. in washing step a.
References Cited (Backward Citations)
US4169789A
Cited
US4761295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |