GB971174A - Production of pyridine - Google Patents
Production of pyridineInfo
- Publication number
- GB971174A GB971174A GB3129961A GB3129961A GB971174A GB 971174 A GB971174 A GB 971174A GB 3129961 A GB3129961 A GB 3129961A GB 3129961 A GB3129961 A GB 3129961A GB 971174 A GB971174 A GB 971174A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyridine
- crotonaldehyde
- formaldehyde
- ammonia
- silica
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
- C07D213/08—Preparation by ring-closure
Abstract
Pyridine is prepared by reacting in the vapour phase at elevated temperature, a mixture of formaldehyde, crotonaldehyde and ammonia, the formaldehyde being in a molar excess over the crotonaldehyde. The ammonia may be added to the treated aldehydes preferably in a temperature range 300 DEG C. to 500 DEG C. and in the presence of a condensation catalyst such as silica, alumina or a mixture thereof which may be admixed with titania, zirconia, ceria or thoria, and contain one or more metal or compound thereof such as zinc, cadmium, tin, lead, tungsten, nickel, cobalt, chromium, molybdenum, iron, palladium or silver. Picolines may be present in the product which is fractionally distilled to yield pyridine. Examples describe processes using silica/alumina admixed with lead fluoride as a catalyst.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3129961A GB971174A (en) | 1961-08-31 | 1961-08-31 | Production of pyridine |
| SE884262A SE323676B (en) | 1961-08-31 | 1962-08-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3129961A GB971174A (en) | 1961-08-31 | 1961-08-31 | Production of pyridine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB971174A true GB971174A (en) | 1964-09-30 |
Family
ID=10321074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3129961A Expired GB971174A (en) | 1961-08-31 | 1961-08-31 | Production of pyridine |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB971174A (en) |
| SE (1) | SE323676B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0040698A1 (en) * | 1980-05-23 | 1981-12-02 | Lonza Ag | Process for the preparation of 3-picoline |
-
1961
- 1961-08-31 GB GB3129961A patent/GB971174A/en not_active Expired
-
1962
- 1962-08-14 SE SE884262A patent/SE323676B/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0040698A1 (en) * | 1980-05-23 | 1981-12-02 | Lonza Ag | Process for the preparation of 3-picoline |
| US4337342A (en) * | 1980-05-23 | 1982-06-29 | Lonza Ltd. | Process for the preparation of 3-picoline |
Also Published As
| Publication number | Publication date |
|---|---|
| SE323676B (en) | 1970-05-11 |
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