GB506928A - Improvements in or relating to the hydrogenation of naphthylamines - Google Patents
Improvements in or relating to the hydrogenation of naphthylaminesInfo
- Publication number
- GB506928A GB506928A GB33747/37A GB3374737A GB506928A GB 506928 A GB506928 A GB 506928A GB 33747/37 A GB33747/37 A GB 33747/37A GB 3374737 A GB3374737 A GB 3374737A GB 506928 A GB506928 A GB 506928A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthylamine
- per square
- square inch
- nickel
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
506,928. Hydrogenated napthylamines. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Dec. 6, 1937, No. 33747. Convention date, Dec. 5, 1936. [Class 1 (i)] [Also in Group IV] Decahydro-#-naphthylamine is obtained by hydrogenating #-naphthylamine or tetrahydro- #-naphthylamine at 250-300‹ C. and at a pressure eventually not less than 2000 lb. per square inch in the presence of a catalyst containing nickel and in the presence or absence of an inert solvent. In the examples, (1) #-naphthylamine and a nickel chromite catalyst or (example 2) a nickel catalyst are heated to 175-225‹ C. under a hydrogen pressure of 1000-2000 lb. per square inch, and the temperature is then raised to 270‹ C. and the hydrogen pressure to 2000-3000 lb. per square inch; (3) ac-tetrahydro-#-naphthylamine and a nickel chromite catalyst are heated to 200‹ C. under a hydrogen pressure of 1500 lb: per square inch and the temperature is then raised to 300‹ C. and the pressure to 3000 lb. per square inch. Specifications 276,571, 290,175, [both in Class 1 (i)], 395,232 ; and 418,374, [Group IV], are referred to. The Specification as open to inspection under Sect. 91 refers to the hydrogenation of N-alkyl-, N-aryl- and other N-substituted #-naphthylamines, and states that other hydrogenating catalysts may be used, platinum and other noble-metal catalysts and cobalt, copper and their chromites being specified. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US506928XA | 1936-12-05 | 1936-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB506928A true GB506928A (en) | 1939-06-06 |
Family
ID=21966807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33747/37A Expired GB506928A (en) | 1936-12-05 | 1937-12-06 | Improvements in or relating to the hydrogenation of naphthylamines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB506928A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2582375A (en) * | 1947-02-28 | 1952-01-15 | Chemical Foundation Inc | Insect control with an hydrogenated naphthylamine |
| US4914239A (en) * | 1987-06-24 | 1990-04-03 | New Japan Chemical Co., Ltd. | Method for production of cyclohexylamines |
-
1937
- 1937-12-06 GB GB33747/37A patent/GB506928A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2582375A (en) * | 1947-02-28 | 1952-01-15 | Chemical Foundation Inc | Insect control with an hydrogenated naphthylamine |
| US4914239A (en) * | 1987-06-24 | 1990-04-03 | New Japan Chemical Co., Ltd. | Method for production of cyclohexylamines |
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