Patent US3671511A successfully refreshed from Google Patents.
US3671511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyolefin-substituted amines
Assignee: EDDIE G LINDSTROM
•
Filing: 1970-04-23
•
Granted: 1972-06-20
•
Expires: 1990-04-23
Abstract
Abstract Polyolefin-substituted amines are prepared by chlorinating the polyolefin in an inert medium, removing the inert medium from the chlorinated polyolefin, reacting the chlorinated polyolefin with an excess of amine, removing excess amine for recycle by distillation under vacuum, and finishing the product by charging a diluent and an alkanol and washing, followed by removal of the alkanol and a portion of the diluent which are recycled.
Inventors
- 👤 Lewis R Honnen
- 👤 Harry W Andrewsen
- 👤 Eddie G Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:53
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
The process of claim 1 wherein the major portion of said excess unreacted amine is removed from said system prior to said charging of said diluent, alkanol, and wash water by stripping at elevated temperatures and reduced pressures.
Claim 2
Dependent Claim
186 words
The process of claim 2 wherein said stripping of said inert medium and said hydrogen chloride is carried out in A three-stage operation wherein the first stage operates at a pressure ranging from atmospheric to about 25 psia and at a temperature of from about 135* to 175* F, the second stage operates at a pressure of from about 3 to about 8 psia at a temperature of from about 250* to about 290* F, and the third stage operates at a pressure of from about 0.1 to about 0.5 psia and a temperature of from about 290* to about 310* F, said stripping of said major portion of said excess of reacted amine is carried out in a two-stage operation, operating at elevated temperatures and subatmospheric pressures and with the proviso that the second stage is operating at a higher temperature and a lower pressure than the first stage and that the temperature in said two-stage operation does not exceed 390* F, and said washing is carried out in a three-stage, counter-current washing section at a temperature of from about 110* to said 220* F.
Claim 3
Dependent Claim
51 words
The process of claim 3 wherein a caustic solution is introduced into the first stage of said three-stage washing operation in an amount ranging from sufficient to neutralize substantially all the amine hydrogen chloride salts present in said system up to an amount such that 15 percent excess caustic is present.
Claim 4
Dependent Claim
102 words
The process of claim 4 wherein the ratio of said polyolefin and said chlorine is in the range of 1.2-2.4 moles of chlorine per mole of polyolefin, the mole ratio of said amine to said chlorinated polyolefin is in the range of from 3-4 moles of said amine per gram-atom of chlorine in said chlorinated polyolefin, said inert medium utilized in the formation of the said chlorinated polyolefin is benzene used in an amount to constitute from about 10 to about 50 percent by weight of the composite of said chlorine, said polyolefin and said inert medium, and said alkanol is n-butanol.
Claim 5
Dependent Claim
43 words
The process of claim 5 wherein said benzene is used in an amount of from about 15 to about 30 percent by weight and said n-butanol is used in an amount ranging from 0.10 to 0.2 volume per volume of said polyolefin-substituted amine.
References Cited (Backward Citations)
US2981728A
Cited
US3250313A
Cited
US3278433A
Cited
US3340281A
Cited
US3438757A
Cited
US3565804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |