US4547591A
Expired / Lapsed
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Preparation of linear polyethylenepolyamines with silica-alumina catalysts
Assignee: Texaco Inc
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Filing: 1983-12-16
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Granted: 1985-10-15
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Expires: 2003-12-16
Abstract
Abstract Disclosed is a process for preparing predominantly linear polyethylenepolyamines from the catalyzed reaction of (1) an ethyleneamine and an alkanolamine, (2) ethyleneamines or (3) an alkanolamine and ammonia. The catalyst employed is a silica-alumina catalyst. An acidic phosphorus cocatalyst may be used in conjunction with the silica-alumina catalyst.
Inventors
- 👤 Michael E. Brennan
- 👤 James H. Templeton
- 👤 Ernest L. Yeakey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:21
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A method of preparing predominantly linear polyethylenepolyamines from ethyleneamines and alkanolamines, which comprises: mixing and reacting about one-half mole to about five moles of ethyleneamine per mole of alkanolamine with an alkanolamine at a temperature of about 250° C. to about 400° C. and a pressure of about 500 to about 5000 psig in the presence of about 0.01 to about 20.0 weight percent of a silica-alumina catalyst and about 0.1 to about 3.0 weight percent of a phosphorus acid co-catalyst; and recovering a polyethylenepolyamine product characterized by a relatively large percentage of linear, noncyclic polyethylenepolyamines.
Claim 2
Independent Claim
96 words
A method of preparing predominantly linear polyethylenepolyamines from ethyleneamines and alkanolamines, which comprises: mixing and reacting about one-half mole to about five moles of ethyleneamine per mole of alkanolamine with an alkanolamine at a temperature of about 250° C. to about 400° C. and a pressure of about 500 to about 5000 psig in the presence of about 0.01 to about 20.0 weight percent of a silica-alumina catalyst and about 0.1 to about 3.0 weight percent of a phosphorus acid co-catalyst; and recovering a polyethylenepolyamine product characterized by a relatively large percentage of linear, noncyclic polyethylenepolyamines.
Claim 3
Dependent Claim
10 words
The method of claim 1, wherein the ethyleneamine is ethylenediamine.
Claim 4
Dependent Claim
10 words
The method of claim 1, wherein the alkanolamine is monoethanolamine.
Claim 5
Independent Claim
103 words
A method of preparing predominantly linear polyethylenepolyamines from ethyleneamines and alkanolamines, which comprises: mixing and reacting about one-half mole to about two moles of ethyleneamine per mole of alkanolamine with alkanolamine at a temperature of about 275° C. to about 325° C. and a pressure of about 1000 to about 3000 psig in the presence of about 2.5% to about 6.0% by weight of a pelleted silica-alumina catalyst and about 0.1% to about 3% by weight of a phosphorous acid cocatalyst, based on the amount of alkanolamine present; and recovering a polyethylenepolyamine product characterized by a relatively large percentage of linear, noncyclic polyethylenepolyamines.
Claim 6
Independent Claim
103 words
A method of preparing predominantly linear polyethylenepolyamines from ethyleneamines and alkanolamines, which comprises: mixing and reacting about one-half mole to about two moles of ethyleneamine per mole of alkanolamine with alkanolamine at a temperature of about 275° C. to about 325° C. and a pressure of about 1000 to about 3000 psig in the presence of about 2.5% to about 6.0% by weight of a pelleted silica-alumina catalyst and about 0.1% to about 3% by weight of a phosphorous acid cocatalyst, based on the amount of alkanolamine present; and recovering a polyethylenepolyamine product characterized by a relatively large percentage of linear, noncyclic polyethylenepolyamines.
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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |