GB1276776A - Process for the production of pyridine-carboxylic acids - Google Patents
Process for the production of pyridine-carboxylic acidsInfo
- Publication number
- GB1276776A GB1276776A GB45147/70A GB4514770A GB1276776A GB 1276776 A GB1276776 A GB 1276776A GB 45147/70 A GB45147/70 A GB 45147/70A GB 4514770 A GB4514770 A GB 4514770A GB 1276776 A GB1276776 A GB 1276776A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyridine
- flow tube
- reaction
- temperature
- sept
- 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
- C07D213/60—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 with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/79—Acids; Esters
- C07D213/803—Processes of preparation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyridine Compounds (AREA)
Abstract
1276776 Pyridine carboxylic acids LONZA Ltd 22 Sept 1970 [24 Sept 1969] 45147/70 Heading C2C A pyridine-carboxylic acid is prepared by oxidizing an alkyl-pyridine and/or a heterocyclic compound which carries a pyridine nucleus and which is substituted in at least one position by a group which is oxidizable under the reaction conditions to a carboxylic acid radical, comprising passing at least one said alkyl-pyridine or heterocyclic compound with an excess of nitric acid through an inert flow tube at a temperature of 180-370‹ C. and pressure of 20-500 atmospheres, the reaction temperature being attained and maintained by generating the thermal energy required directly in the wall of the flow tube and discharging the product from the flow tube. An electric current may suitably be passed through the material of the flow tube e.g. by making it the secondary winding of a transformer and the part of the flow tube which forms the reaction path is short-circuited. Advantageously, the pressure and temperature of the reaction product are partially reduced, prior to its discharge from the flow tube, by a baffle system connected before a discharge valve in the flow path. An example describes the preparation of nicotinic acid and the process may be used to prepare picolinic, and cinchomeric acids.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1441969A CH515903A (en) | 1969-09-24 | 1969-09-24 | Process for the preparation of pyridinecarboxylic acids |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1276776A true GB1276776A (en) | 1972-06-07 |
Family
ID=4400679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB45147/70A Expired GB1276776A (en) | 1969-09-24 | 1970-09-22 | Process for the production of pyridine-carboxylic acids |
Country Status (13)
Country | Link |
---|---|
JP (1) | JPS5335950B1 (en) |
AT (1) | AT300809B (en) |
BE (1) | BE756534A (en) |
CH (1) | CH515903A (en) |
DE (1) | DE2046556A1 (en) |
ES (1) | ES383857A1 (en) |
FR (1) | FR2062985B1 (en) |
GB (1) | GB1276776A (en) |
IT (1) | IT1035029B (en) |
NL (1) | NL7013937A (en) |
RO (1) | RO59308A (en) |
SE (1) | SE394814B (en) |
ZA (1) | ZA706488B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614019A1 (en) * | 1986-04-25 | 1987-11-05 | Degussa | METHOD FOR PRODUCING HIGH PURITY CRYSTAL CRYSTALLINE NICOTINIC ACID |
-
0
- BE BE756534D patent/BE756534A/en unknown
-
1969
- 1969-09-24 CH CH1441969A patent/CH515903A/en not_active IP Right Cessation
-
1970
- 1970-09-18 IT IT7053499A patent/IT1035029B/en active
- 1970-09-21 SE SE7012821A patent/SE394814B/en unknown
- 1970-09-21 NL NL7013937A patent/NL7013937A/xx unknown
- 1970-09-22 GB GB45147/70A patent/GB1276776A/en not_active Expired
- 1970-09-22 ES ES383857A patent/ES383857A1/en not_active Expired
- 1970-09-22 DE DE19702046556 patent/DE2046556A1/en active Pending
- 1970-09-22 ZA ZA706488A patent/ZA706488B/en unknown
- 1970-09-23 FR FR707034518A patent/FR2062985B1/fr not_active Expired
- 1970-09-23 AT AT859970A patent/AT300809B/en not_active IP Right Cessation
- 1970-09-24 JP JP8332370A patent/JPS5335950B1/ja active Pending
- 1970-09-24 RO RO64521A patent/RO59308A/ro unknown
Also Published As
Publication number | Publication date |
---|---|
DE2046556A1 (en) | 1971-04-22 |
RO59308A (en) | 1976-03-15 |
BE756534A (en) | 1971-03-01 |
ZA706488B (en) | 1972-04-26 |
IT1035029B (en) | 1979-10-20 |
CH515903A (en) | 1971-11-30 |
ES383857A1 (en) | 1973-07-16 |
AT300809B (en) | 1972-08-10 |
NL7013937A (en) | 1971-03-26 |
FR2062985B1 (en) | 1973-01-12 |
FR2062985A1 (en) | 1971-07-02 |
SE394814B (en) | 1977-07-11 |
JPS5335950B1 (en) | 1978-09-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1238960A (en) | ||
GB1430838A (en) | 7beta-amino-cepham-3-one-4-carboxylic acid compounds and process for their manufacture | |
GB1276776A (en) | Process for the production of pyridine-carboxylic acids | |
GB1473379A (en) | Process for the manufacture of maleimides | |
GB1100888A (en) | Arc starting system for welding | |
YU232074A (en) | Process for the continuous dehydratation of maleic acid into the maleic acid anhydride | |
FR2089340A5 (en) | Electric furnace | |
ES471336A1 (en) | Highly selective oxidizing process for preparing pyridin-carboxylic acids | |
SU463323A1 (en) | Process for preparing substituted lactones of 2-(2'-hydroxyethyl)-nicotinic acid or their n-oxides | |
GB1267108A (en) | ||
GB1069337A (en) | Basically substituted bis-naphthalimides and their production | |
GB1481159A (en) | Process for the preparation of 5-alkyl-picolinic acids | |
GB1308048A (en) | Manufacture of 1,1-disubstituted-4,4-bipyridylium salts | |
JPS5269036A (en) | Controller of inductive heating | |
GB927497A (en) | New 5-nitrofuran derivatives | |
GB1037380A (en) | Process for the production of basic esters of pyridine-carboxylic acids | |
CA689434A (en) | Process for the production of derivatives of fluoro-dichloro-methane sulphenic acid | |
GB1241869A (en) | Process for making a halopyridine | |
CA697573A (en) | Process for the oxidation of cycloalkane carboxylic acid | |
GB1132746A (en) | Process for preparing nicotinic acid and isonicotinic acid | |
GB1412016A (en) | Electrical control circuits | |
van Berlekom et al. | Using the Four-Wire Electrode Submerged-Arc Welding Process for the Production of Longitudinally Welded Pipes | |
GB1415807A (en) | 4-amino-1,8-naphthalimido-3-sulphonic acids and process for preparing them | |
GB1385919A (en) | Process for producing nicotinic acid | |
CA557567A (en) | Monopotassium salt of pyrazine-2,3-dicarboxylic acid |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |