GB809117A - Improved process for preparing aromatic aldehyde-carboxylic acids - Google Patents
Improved process for preparing aromatic aldehyde-carboxylic acidsInfo
- Publication number
- GB809117A GB809117A GB13428/56A GB1342856A GB809117A GB 809117 A GB809117 A GB 809117A GB 13428/56 A GB13428/56 A GB 13428/56A GB 1342856 A GB1342856 A GB 1342856A GB 809117 A GB809117 A GB 809117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carboxylic acid
- acids
- nitric acid
- acid
- aromatic aldehyde
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Aromatic aldehyde carboxylic acids are prepared by the oxidation with dilute nitric acid, of a chloromethylated carboxylic acid, or mixture of such acids. The nitric acid used is preferably weaker than 60 per cent concentration and is boiled with e.g. p- or m-chloromethylbenzoic acid, or a mixture of o-, m- and p-acids, or b -bromomethyl-naphthalene a -carboxylic acid, until all the hydrolizable chlorine present in the original mass has been brought into solution. Nitric acid may be added continuously as the reaction proceeds. The final product may be purified by filtration and recrystallization, or by drying or distilling from water, or by heating in the presence of an organic solvent such as cyclohexanol, butyl or amyl alcohols and then recrystallizing. Examples are given illustrating the preparation of m-benzaldehyde carboxylic acid and parabenzaldehyde carboxylic acid; o-phthalaldehyde carboxylic acid is also mentioned. The amount of nitric acid used may be 5-20 times the weight of chloromethylated carboxylic acid used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT809117X | 1955-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB809117A true GB809117A (en) | 1959-02-18 |
Family
ID=11317075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13428/56A Expired GB809117A (en) | 1955-05-16 | 1956-05-01 | Improved process for preparing aromatic aldehyde-carboxylic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB809117A (en) |
-
1956
- 1956-05-01 GB GB13428/56A patent/GB809117A/en not_active Expired
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