US4070399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of terephthalnitrile
Assignee: Sunoco Inc R&M
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Filing: 1976-09-20
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Granted: 1978-01-24
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Expires: 1996-09-20
Abstract
Abstract A process for the preparation of 1,4-bis-(aminomethyl)cyclohexane by hydrogenating a solvent solution of terephthalonitrile containing at least about 5% by volume of ammonia, said hydrogenation being conducted at a temperature between about 100° and about 150° C, at a pressure of at least about 750 psig, and in the presence of an oxide supported catalyst consisting of from about 10% to 45% by weight of palladium and from about 90% to about 55% by weight of ruthenium.
Inventors
- 👤 Walter A. Butte, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/462; C; C07; C07C; C07C209/00; C07C209/44; C07C209/48; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A process for the preparation of 1,4-bis(aminomethyl)cyclohexane by hydrogenating an inert solvent solution of terephthalonitrile containing at least about 5% by volume of ammonia, said solvent being selected from the group of alcohols, ether and amines, said hydrogenation being conducted at a temperature between about 100° and about 150° C, at a pressure of at least about 750 psig, and in the presence of oxide supported catalyst consisting of from about 10% to 45% by weight of palladium and from about 90% to about 55% by weight of ruthenium.
Claim 2
Dependent Claim
89 words
A process for the preparation of 1,4-bis(aminomethyl)cyclohexane by hydrogenating an inert solvent solution of terephthalonitrile containing at least about 5% by volume of ammonia, said solvent being selected from the group of alcohols, ether and amines, said hydrogenation being conducted at a temperature between about 100° and about 150° C, at a pressure of at least about 750 psig, and in the presence of oxide supported catalyst consisting of from about 10% to 45% by weight of palladium and from about 90% to about 55% by weight of ruthenium.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the solvent is a lower alkanol.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein the solvent is ethanol.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the solvent is a cyclic ether having five to six atoms in the ring.
Claim 6
Dependent Claim
10 words
The process of claim 4 wherein the solvent is tetrahydrofuran.
Claim 7
Dependent Claim
10 words
The process of claim 4 wherein the solvent is dioxane.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein the solvent is an amine.
Claim 9
Dependent Claim
14 words
The process of claim 7 wherein the solvent is a secondary lower alkyl amine.
Claim 10
Dependent Claim
10 words
The process of claim 8 wherein the solvent is diethylamine.
Claim 11
Dependent Claim
10 words
The process of claim 1 where the solvent is 1,4-bis(aminomethyl)cyclohexane.
Claim 12
Dependent Claim
18 words
The process of claim 10 wherein a portion of the product is recycled as solvent for the process.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |