Patent US4065492A successfully refreshed from Google Patents.
US4065492A
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Process for preparing aminonaphthalene derivatives in a titanium or titanium alloy reactor
Assignee: Bayer AG
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Filing: 1976-06-22
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Granted: 1977-12-27
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Expires: 1996-06-22
Abstract
Abstract Aminonaphthalene derivatives are prepared by reacting the corresponding naphthol derivative with ammonia or amines in the presence of bisulfites. The reaction is carried out in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, carbon largely excluded. Suitable alloys are titanium/palladium, titanium/nickel or titanium/molybdenum.
Inventors
- 👤 Georg Spielberger
- 👤 Hermann Wunderlich
- 👤 Gunther Klag
- 👤 Marko Zlokarnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:54
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
In a process for preparing aminonaphthalene derivatives wherein the corresponding naphthol derivative is reacted with ammonia or amines in the presence of bisulfites, the improvement which comprises carrying out the reaction in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, wherein the elementary carbon content in the system used is less than 0.1% by weight.
Claim 2
Dependent Claim
64 words
In a process for preparing aminonaphthalene derivatives wherein the corresponding naphthol derivative is reacted with ammonia or amines in the presence of bisulfites, the improvement which comprises carrying out the reaction in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, wherein the elementary carbon content in the system used is less than 0.1% by weight.
Claim 3
Dependent Claim
21 words
Process of claim 1 wherein the reaction is carried out in reaction apparatus made of a titanium/palladium, titanium/nickel or titanium/molybdenum alloy.
Claim 4
Dependent Claim
26 words
Process of claim 1 wherein a titanium/palladium alloy with 99.0 to 99.5% by weight of titanium and 0.05 to 0.2% by weight of palladium is used.
Claim 5
Dependent Claim
26 words
Process of claim 1 wherein a titanium/nickel alloy with 97.0 to 99.5% by weight of titanium and 0.5 to 3.0% by weight of nickel is used.
Claim 6
Dependent Claim
26 words
Process of claim 1 wherein a titanium/molybdenum alloy with 50.0 to 80.0% by weight of titanium and 20.0 to 50.0% by weight of molybdenum is used.
Claim 7
Dependent Claim
44 words
Process of claim 1 wherein a titanium material which consists of 99.848% by weight of titanium, 0.03% by weight of iron, 0.01% by weight of carbon, 0.01% by weight of nitrogen, 0.1% by weight of oxygen and 0.002% by weight of hydrogen is employed.
Claim 8
Dependent Claim
44 words
Process of claim 1 wherein a titanium/palladium alloy which consists of 99.36% by weight of titanium, 0.2% by weight of palladium, 0.2% by weight of iron, 0.08% by weight of carbon, 0.05% by weight of nitrogen and 0.05% by weight of hydrogen is used.
Claim 9
Dependent Claim
14 words
Process of claim 1 wherein a multi-chamber reactor is used as the reaction apparatus.
Claim 10
Dependent Claim
19 words
Process of claim 1 wherein a multi-chamber reactor with 10 to 20 chambers is used as the reaction apparatus.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |