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US4124758A
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Aminated hydroxyalkyl cellulose
Assignee: Huntsman Corp
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Filing: 1977-08-29
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Granted: 1978-11-07
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Expires: 1997-08-29
Abstract
Abstract Covers aminated cellulose derivatives prepared by the reductive amination of a hydroxyalkyl cellulose.
Inventors
- 👤 Lewis W. Watts, Jr.
- 👤 Ernest L. Yeakey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:22
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C08B15/00; C08B15/05; C08B15/06; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/25; D21H17/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
An aminated cellulose derivative prepared by the reductive amination of a hydroxyalkyl cellulose by reaction with ammonia or ammonium hydroxide or an alkyl amine at 160° C. to 250° C. and under 750-4000 psig pressure in presence of hydrogen and a reducing catalyst comprising a metal selected from the group consisting of copper, nickel, cobalt, chromium, aluminum, maganese, platinum, palladium, and rhodium, oxides of said metals and mixtures of the foregoing.
Claim 2
Dependent Claim
71 words
An aminated cellulose derivative prepared by the reductive amination of a hydroxyalkyl cellulose by reaction with ammonia or ammonium hydroxide or an alkyl amine at 160° C. to 250° C. and under 750-4000 psig pressure in presence of hydrogen and a reducing catalyst comprising a metal selected from the group consisting of copper, nickel, cobalt, chromium, aluminum, maganese, platinum, palladium, and rhodium, oxides of said metals and mixtures of the foregoing.
Claim 3
Dependent Claim
16 words
The derivative of claim 1 prepared by the reductive amination of a hydroxyalkyl cellulose with ammonia.
Claim 4
Dependent Claim
17 words
The derivatives of claim 1 prepared by the reductive amination of a hydroxyalkyl cellulose with ammonium hydroxide.
Claim 5
Dependent Claim
76 words
The process of preparing an aminated cellulose derivative which comprises providing a hydroalkyl cellulose and reductively aminating said hydroxyalkyl cellulose with ammonia or ammonium hydroxide or an alkyl amine at 160° C. to 250° C. and under 750-4000 psig pressure in presence of hydrogen and a reducing catalyst comprising a metal selected from the group consisting of copper, nickel, cobalt, chromium, aluminum, maganese, platinum, palladium, and rhodium, oxides of said metals and mixtures of the foregoing.
Claim 6
Dependent Claim
76 words
The process of preparing an aminated cellulose derivative which comprises providing a hydroalkyl cellulose and reductively aminating said hydroxyalkyl cellulose with ammonia or ammonium hydroxide or an alkyl amine at 160° C. to 250° C. and under 750-4000 psig pressure in presence of hydrogen and a reducing catalyst comprising a metal selected from the group consisting of copper, nickel, cobalt, chromium, aluminum, maganese, platinum, palladium, and rhodium, oxides of said metals and mixtures of the foregoing.
Claim 7
Dependent Claim
12 words
The process of claim 4 wherein said catalyst is a nickel-based catalyst.
Claim 8
Dependent Claim
15 words
The process of claim 5 wherein said nickel-based catalyst is Raney nickel or nickel-copper-chromium catalyst.
References Cited (Backward Citations)
US2136296A
Cited
US3152998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |