US4025561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing secondary alkyl primary amines from n-paraffin
Assignee: Texaco Inc
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Filing: 1976-01-26
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Granted: 1977-05-24
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Expires: 1996-01-26
Abstract
Abstract A process for converting mixtures of C 6 to C 30 n-paraffin and n-paraffin by-products to substantially pure n-paraffin which comprises catalytically hydrogenating the mixture at a temperature of from about 600° to 750° F. in the presence of a Group VIII metal on alumina catalyst where the catalyst contains from about 0.05 to 2.0 weight percent of an alkali metal oxide or alkaline earth metal oxide or thallous oxide. The catalyst can additionally contain a Group VIB or VIIB metal.
Inventors
- 👤 Robert M. Suggitt
- 👤 Walter C. Gates, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J23/70; B01J23/76; B01J23/78; B01J23/84
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
In a process for producing secondary alkyl primary amines from n-paraffin reactant wherein a portion of said n-paraffin is nitrated to form a nitroparaffin along with nitrated and oxygenated by-products, wherein said nitroparaffin is substantially hydrogenated to said amine and where said amine is separated from a mixture of unreacted paraffin and oxygenated by-products, the improvement which comprises: (a) catalytically hydrogenating said mixture of unreacted paraffin and oxygenated by-products at a temperature of from about 600° to 750° F. in the presence of a catalyst composed of alumina, from about 0.1 to 5.0 weight percent of a Group VIII metal and from about 0.05 to 2.0 weight percent of an alkali metal oxide, alkaline earth metal oxide or thallous oxide to substantially pure n-paraffins; and (b) recycling said n-paraffin product of (a) for nitration with said n-paraffin reactant.
Claim 2
Dependent Claim
138 words
In a process for producing secondary alkyl primary amines from n-paraffin reactant wherein a portion of said n-paraffin is nitrated to form a nitroparaffin along with nitrated and oxygenated by-products, wherein said nitroparaffin is substantially hydrogenated to said amine and where said amine is separated from a mixture of unreacted paraffin and oxygenated by-products, the improvement which comprises: (a) catalytically hydrogenating said mixture of unreacted paraffin and oxygenated by-products at a temperature of from about 600° to 750° F. in the presence of a catalyst composed of alumina, from about 0.1 to 5.0 weight percent of a Group VIII metal and from about 0.05 to 2.0 weight percent of an alkali metal oxide, alkaline earth metal oxide or thallous oxide to substantially pure n-paraffins; and (b) recycling said n-paraffin product of (a) for nitration with said n-paraffin reactant.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein said mixture is hydrogenated at from about 610° to 700° F.
Claim 4
Dependent Claim
19 words
A process according to claim 1 wherein said mixture is initially hydrogenated at from about 350° to 500° F.
Claim 5
Dependent Claim
19 words
A process according to claim 1 wherein said mixture is initially hydrogenated at from about 400° to 450° F.
Claim 6
Dependent Claim
22 words
A process according to claim 1 wherein said mixture is additionally hydrogenated at 450° to 650° F. prior to recycling in (b).
Claim 7
Dependent Claim
25 words
A process according to claim 1 wherein said Group VIII metal is selected from the group consisting of platinum, palladium, rhodium, ruthenium, nickel and cobalt.
Claim 8
Dependent Claim
23 words
A process according to claim 1 wherein said alkali metal oxide is lithium oxide, sodium oxide, potassium oxide, rubidium oxide or cesium oxide.
Claim 9
Dependent Claim
20 words
A process according to claim 1 wherein said alkaline earth metal oxide is calcium oxide, strontium oxide or barium oxide.
Claim 10
Dependent Claim
19 words
A process according to claim 1 wherein said n-paraffin and oxygenated by-product has from 6 to 30 carbon atoms.
Claim 11
Dependent Claim
18 words
A process according to claim 1 wherein said catalyst comprises nickel oxide, molybdenum oxide, barium oxide and alumina.
Claim 12
Dependent Claim
15 words
A process according to claim 1 wherein said catalyst comprises platinum, potassium oxide and alumina.
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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |