US4218312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane separation of organics from aqueous solutions
Assignee: Monsanto Co
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Filing: 1975-12-01
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Granted: 1980-08-19
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Expires: 1995-12-01
Abstract
Abstract Organics selected from alkanols, alkyl benzenes and organic nitriles are separated from aqueous solutions by contacting the aqueous solution feed with a first surface of a polymeric membrane comprised of an aliphatic nylon selectively permeable to organic components; while maintaining a second and opposite membrane surface at a lower chemical potential than the first membrane surface for said organic components, permeating a portion of the organic components into and through the membrane; and withdrawing from the second membrane surface a mixture having a higher total concentration of organic components than the organic components concentration of the aqueous solution feed stream.
Inventors
- 👤 Eli Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/02; B01D61/00; B01D61/24; B01D61/243; B01D61/36; B01D61/362; B01D2325/00; B01D2325/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A process for separating neutral organics from an aqueous solution comprising: contacting an aqueous solution containing neutral organics having at least about four carbon atoms per molecule selected from the group consisting of alkanols, alkyl benzenes and organic nitriles with a first surface of a hydrophobic polymeric membrane comprised of an aliphatic nylon selectively permeable to the neutral organic components contained in the aqueous solution, maintaining a second and opposite membrane surface at a lower chemical potential than the first membrane surface for the neutral organic components, permeating a portion of the neutral organic components into and through the membrane, and withdrawing at the second membrane surface a vapor mixture having a higher total concentration of said neutral organic components than the total concentration of said neutral organic components in the aqueous solution contacting said first surface.
Claim 2
Dependent Claim
137 words
A process for separating neutral organics from an aqueous solution comprising: contacting an aqueous solution containing neutral organics having at least about four carbon atoms per molecule selected from the group consisting of alkanols, alkyl benzenes and organic nitriles with a first surface of a hydrophobic polymeric membrane comprised of an aliphatic nylon selectively permeable to the neutral organic components contained in the aqueous solution, maintaining a second and opposite membrane surface at a lower chemical potential than the first membrane surface for the neutral organic components, permeating a portion of the neutral organic components into and through the membrane, and withdrawing at the second membrane surface a vapor mixture having a higher total concentration of said neutral organic components than the total concentration of said neutral organic components in the aqueous solution contacting said first surface.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein the aliphatic nylon is nylon 66.
Claim 4
Dependent Claim
13 words
The process according to claim 1 wherein the aliphatic nylon is nylon 12.
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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |