US4376708A
Expired / Lapsed
US
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Flotation processes using ureylenes
Assignee: Baker Petrolite LLC
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Filing: 1981-05-11
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Granted: 1983-03-15
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Expires: 2001-05-11
Abstract
Abstract This invention relates to ureylene prepared by reacting an oxyalkylated polyamine with urea and to uses of such ureylene for example in removing oils, solids, and combinations thereof from aqueous systems, etc.
Inventors
- 👤 Thomas J. Bellos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G71/00; C08G71/02; B03D1/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A flotation process of removing particulate matter from an aqueous system which comprises employing a ureylene derived from first reacting a polyamine with about 0.5 to 0.8 mole of an oxyalkylating agent per NH equivalents of said polyamine, and thereafter reacting said oxyalkylated polyamine with urea.
Claim 2
Dependent Claim
46 words
A flotation process of removing particulate matter from an aqueous system which comprises employing a ureylene derived from first reacting a polyamine with about 0.5 to 0.8 mole of an oxyalkylating agent per NH equivalents of said polyamine, and thereafter reacting said oxyalkylated polyamine with urea.
Claim 3
Dependent Claim
25 words
The flotation process of claim 1 where the amount of urea added is about 0.5 to 0.8 mole per NH equivalents of said oxyalkylated polyamine.
Claim 4
Dependent Claim
13 words
The flotation process of claim 2 where said oxyalkylating agent is alkylene oxide.
Claim 5
Dependent Claim
13 words
The flotation process of claim 3 where said alkylene oxide is ethylene oxide.
Claim 6
Dependent Claim
19 words
The flotation process of claim 4 where the ureylene is converted to salt form to make it more soluble.
Claim 7
Dependent Claim
17 words
The flotation process of claim 5 where said conversion occurs by contact of the ureylene with HCl.
References Cited (Backward Citations)
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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) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |