US4929361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting fouling in protein-containing fluids
Assignee: Veolia WTS USA Inc
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Filing: 1989-05-25
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Granted: 1990-05-29
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Expires: 2009-05-25
Abstract
Abstract Methods for controlling the formation of proteinaceous fouling deposits in high temperature evaporators and concentrators as employed in processing steepwater in the wet milling of corn. The methods comprise adding a surfactant, preferably a nonionic surfactant to the steepwater. Particularly effective surfactants are oxyalkylated sorbitan R surfactants where R is monooleate, trioleate, monostearate, tristearate, monopalmitate and monolaurate.
Inventors
- 👤 David M. Polizzotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F1/00; C02F1/02; C02F1/04; C02F1/042; C08; C08B; C08B30/00; C08B30/04; C08B30/042; C08B30/044; C08B30/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
31 words
A process for controlling organic fouling of heat transfer surfaces exposed to an aqueous, acidic proteinaceous solution which comprises adding to said solution an effective inhibiting amount of a nonionic surfactant.
Claim 2
Dependent Claim
31 words
A process for controlling organic fouling of heat transfer surfaces exposed to an aqueous, acidic proteinaceous solution which comprises adding to said solution an effective inhibiting amount of a nonionic surfactant.
Claim 3
Dependent Claim
21 words
The process of claim 1, wherein said proteinaceous solution is a wet corn milling steepwater having a pH below about 4.0.
Claim 4
Dependent Claim
32 words
The process of claim 1 wherein said nonionic surfactant is a polyoxyethylene 20 sorbitan R surfactant wherein R is selected from the group consisting of monooleate, trioleate, monostearate, tristearate, monolaurate and monopalmitate.
Claim 5
Dependent Claim
32 words
A process for controlling organic fouling of heat transfer surfaces exposed to aqueous, acidic wet corn milling steepwater which comprises adding to said steepwater an effective inhibiting amount of a nonionic surfactant.
Claim 6
Dependent Claim
32 words
A process for controlling organic fouling of heat transfer surfaces exposed to aqueous, acidic wet corn milling steepwater which comprises adding to said steepwater an effective inhibiting amount of a nonionic surfactant.
Claim 7
Dependent Claim
32 words
The process of claim 4 wherein said nonionic surfactant is a polyoxyethylene 20 sorbitan R surfactant wherein R is selected from the group consisting of monooleate, trioleate, monostearate, tristearate, monolaurate and monopalmitate.
Claim 8
Dependent Claim
18 words
The process of claim 4 wherein said acidic wet corn milling steepwater has a pH below about 4.0.
Claim 9
Dependent Claim
18 words
The process of claim 4 wherein said acidic wet corn milling steepwater has a pH below about 4.0.
Claim 10
Dependent Claim
50 words
A process for controlling organic fouling of heat transfer surfaces exposed to acidic wet corn milling steepwater which comprises adding to said steepwater an effective inhibiting amount of a polyoxyethylene 20 sorbitan R surfactant wherein R is selected from the group consisting of monooleate, trioleate, monostearate, tristearate, monolaurate and monopalmitate.
Claim 11
Dependent Claim
50 words
A process for controlling organic fouling of heat transfer surfaces exposed to acidic wet corn milling steepwater which comprises adding to said steepwater an effective inhibiting amount of a polyoxyethylene 20 sorbitan R surfactant wherein R is selected from the group consisting of monooleate, trioleate, monostearate, tristearate, monolaurate and monopalmitate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |