GB1357207A - Preparation of pyridine or pyridine with 2,6-lutidine as by-product - Google Patents
Preparation of pyridine or pyridine with 2,6-lutidine as by-productInfo
- Publication number
- GB1357207A GB1357207A GB5509471A GB5509471A GB1357207A GB 1357207 A GB1357207 A GB 1357207A GB 5509471 A GB5509471 A GB 5509471A GB 5509471 A GB5509471 A GB 5509471A GB 1357207 A GB1357207 A GB 1357207A
- Authority
- GB
- United Kingdom
- Prior art keywords
- picoline
- pyridine
- reaction
- catalyst
- gas
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyridine Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1357207 Pyridine from α-picoline STAMICARBON NV 26 Nov 1971 [4 Dec 1970] 55094/71 Heading C2C The invention comprises a process for the preparation of pyridine by gas-phase demethylation of α-picoline with steam at 250-360‹ C. in the presence of a metallic hydrogenation catalyst using a contact time of 0À5-15 seconds. Contact times are obtained by dividing the catalyst volume by the volume rate of flow per second of the gas mixture measured at any desired temperature and corrected to the reaction temperature and pressure. It is preferred to employ 4-25 moles of steam per mole of α- picoline in the reaction gas and a preferred catalyst is nickel on alumina or silica gel. Other catalyst metals specified are nickel, cobalt, platinum, palladium and ruthenium. Some 2,6-lutidine is produced during the reaction (#3%)# the amount may be increased by adding hydrogen to the reaction gas, preferably in an amount of 2-20 moles per mole of α-picoline. The gaseous reaction effluent is condensed and may then be extracted, e.g. with benzene and the resulting solution fractionally distilled.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7017718.A NL167158C (en) | 1970-12-04 | 1970-12-04 | PROCESS FOR THE PREPARATION OF PYRIDINE BY DEMETHYLATION OF ALFA-PICOLINE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1357207A true GB1357207A (en) | 1974-06-19 |
Family
ID=19811721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5509471A Expired GB1357207A (en) | 1970-12-04 | 1971-11-26 | Preparation of pyridine or pyridine with 2,6-lutidine as by-product |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5024316B1 (en) |
| AT (1) | AT310752B (en) |
| BE (1) | BE776165A (en) |
| BR (1) | BR7108022D0 (en) |
| CA (1) | CA949972A (en) |
| CH (1) | CH562796A5 (en) |
| DE (1) | DE2159846A1 (en) |
| ES (1) | ES397650A1 (en) |
| FR (1) | FR2117222A5 (en) |
| GB (1) | GB1357207A (en) |
| IT (1) | IT945266B (en) |
| NL (1) | NL167158C (en) |
| SE (1) | SE391923B (en) |
| ZA (1) | ZA717998B (en) |
-
1970
- 1970-12-04 NL NL7017718.A patent/NL167158C/en not_active IP Right Cessation
-
1971
- 1971-11-25 CA CA128,528A patent/CA949972A/en not_active Expired
- 1971-11-26 GB GB5509471A patent/GB1357207A/en not_active Expired
- 1971-11-29 ZA ZA717998A patent/ZA717998B/en unknown
- 1971-12-01 FR FR7143069A patent/FR2117222A5/fr not_active Expired
- 1971-12-01 JP JP46097099A patent/JPS5024316B1/ja active Pending
- 1971-12-01 AT AT1034571A patent/AT310752B/en not_active IP Right Cessation
- 1971-12-01 CH CH1748771A patent/CH562796A5/xx not_active IP Right Cessation
- 1971-12-02 BR BR8022/71A patent/BR7108022D0/en unknown
- 1971-12-02 BE BE776165A patent/BE776165A/en not_active IP Right Cessation
- 1971-12-02 DE DE19712159846 patent/DE2159846A1/en not_active Ceased
- 1971-12-03 ES ES397650A patent/ES397650A1/en not_active Expired
- 1971-12-03 IT IT54520/71A patent/IT945266B/en active
- 1971-12-03 SE SE7115570A patent/SE391923B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL7017718A (en) | 1972-06-06 |
| IT945266B (en) | 1973-05-10 |
| FR2117222A5 (en) | 1972-07-21 |
| SE391923B (en) | 1977-03-07 |
| BR7108022D0 (en) | 1973-04-12 |
| CH562796A5 (en) | 1975-06-13 |
| JPS5024316B1 (en) | 1975-08-14 |
| DE2159846A1 (en) | 1972-06-22 |
| NL167158C (en) | 1981-11-16 |
| ZA717998B (en) | 1972-08-30 |
| ES397650A1 (en) | 1974-05-16 |
| CA949972A (en) | 1974-06-25 |
| NL167158B (en) | 1981-06-16 |
| AT310752B (en) | 1973-10-10 |
| BE776165A (en) | 1972-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |