Method of obtaining nicotinic acid
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
US 5728837 A |
| Request number: |
676,352 |
| Request date: |
Jan 26, 1995 |
| patent.field.start_date: |
|
| Registration date: |
Mar 17, 1998 |
| patent.field.request_publication_date: |
|
| Authors |
Alkayeva Yevgeniya
,
Andrushkevich Tamara Vitalievna
,
Zenkovets Galina Alekseevna
,
Makarenko Mikhail Grigorʹevich
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
|
A method has been developed for preparing nicotinic acid with a yield of 82-86% mol, in which method there is no formation of harmful gas wastes and liquid wastes. The process is carried out by gas-phase single-step oxidation of beta -picoline with oxygen in the presence of water vapor and a catalyst on the base of oxides of vanadium and titanium, with or without additives, at a temperature of 250 DEG -290 DEG C. and mole ratios O2: beta -picoline=15-40 and H2O: beta -picoline=10-70.
A method has been developed for preparing nicotinic acid with a yield of 82-86% mol, in which method there is no formation of harmful gas wastes and liquid wastes. The process is carried out by gas-phase single-step oxidation of beta -picoline with oxygen in the presence of water vapor and a catalyst on the base of oxides of vanadium and titanium, with or without additives, at a temperature of 250 DEG -290 DEG C. and mole ratios O2: beta -picoline=15-40 and H2O: beta -picoline=10-70.