US4316841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reforming linear polyamines
Assignee: Air Products and Chemicals Inc
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Filing: 1980-12-08
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Granted: 1982-02-23
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Expires: 2000-12-08
Abstract
Abstract Process for production of polyalkylene polyamines, preferably non-cyclic polyalkylene polyamines, by reforming of other polyalkylene polyamines. The reforming process is effected by reacting the polyalkylene polyamine starting material in the presence of a phosphate, preferably a boron phosphate, catalyst at elevated temperature and pressure and in the presence of sufficient water and sufficient catalyst, for a reaction period and under reaction conditions otherwise adapted to bring about the desired reforming reaction.
Inventors
- 👤 Michael E. Ford
- 👤 Thomas A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:33
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/023; C07C; C07C209/00; C07C209/64; C07D295/04; C07D295/12; C07D295/125; C07D295/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A method for reforming a feedstock of ethylene diamine or polyalkylene polyamine into a polyalkylene polyamine product different from said feedstock, said method comprising heating said feedstock with water and a catalyst to a temperature of 200°-400° C., in a reaction vessel, said catalyst comprised of a phosphate compound of a metal group consisting of boron and lithium, sodium, potassium, and other metals of group IA of the periodic table; beryllium, magnesium, calcium, and other metals of group IIA of the periodic table; zirconium, antimony, tin (valence states II and IV) and iron in both the ferrous and ferric states, said method comprising holding said feedstock with water and catalyst at said temperature for 0.5-5 hours, said proportion of catalyst and water with said feedstock, said feedstock temperature and said time of heating all being selected to cause conversion of said feedstock to a different polyalkylene polyamine product.
Claim 2
Independent Claim
148 words
A method for reforming a feedstock of ethylene diamine or polyalkylene polyamine into a polyalkylene polyamine product different from said feedstock, said method comprising heating said feedstock with water and a catalyst to a temperature of 200°-400° C., in a reaction vessel, said catalyst comprised of a phosphate compound of a metal group consisting of boron and lithium, sodium, potassium, and other metals of group IA of the periodic table; beryllium, magnesium, calcium, and other metals of group IIA of the periodic table; zirconium, antimony, tin (valence states II and IV) and iron in both the ferrous and ferric states, said method comprising holding said feedstock with water and catalyst at said temperature for 0.5-5 hours, said proportion of catalyst and water with said feedstock, said feedstock temperature and said time of heating all being selected to cause conversion of said feedstock to a different polyalkylene polyamine product.
Claim 3
Dependent Claim
28 words
A method, as recited in claim 1, wherein said polyalkylene polyamine in said feedstock is a compound selected from the group consisting of, diethylene triamine and triethylene tetramine.
Claim 4
Dependent Claim
18 words
A method, as recited in claim 1, wherein said feedstock, water and catalyst are heated to 225°-350° C.
Claim 5
Dependent Claim
20 words
A method, as recited in claim 3, wherein said feedstock, water and catalyst are heated for 1 to 4 hours.
Claim 6
Dependent Claim
26 words
A method, as recited in claim 4, wherein said feedstock is a compound selected from the group consisting of ethylene diamine, diethylene triamine and triethylene tetramine.
Claim 7
Dependent Claim
26 words
A method, as recited in claim 1 or claim 5, wherein said catalyst is present in an amount of 5-8 mol percent based on the feedstock.
Claim 8
Dependent Claim
25 words
A method, as recited in claim 1 or claim 5, said catalyst being present in an amount of 1-10 mol percent based on the feedstock.
Claim 9
Independent Claim
17 words
A method, as recited in any of claims 1 to 5, wherein said catalyst is boron phosphate.
Claim 10
Dependent Claim
13 words
A method, as recited in claim 6, wherein said catalyst is boron phosphate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |