GB918283A - Process for the production of monofluorophthalic acids - Google Patents
Process for the production of monofluorophthalic acidsInfo
- Publication number
- GB918283A GB918283A GB143760A GB143760A GB918283A GB 918283 A GB918283 A GB 918283A GB 143760 A GB143760 A GB 143760A GB 143760 A GB143760 A GB 143760A GB 918283 A GB918283 A GB 918283A
- Authority
- GB
- United Kingdom
- Prior art keywords
- monofluorophthalic
- acids
- nitric acid
- production
- aqueous nitric
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/682—Polyesters containing atoms other than carbon, hydrogen and oxygen containing halogens
- C08G63/6824—Polyesters containing atoms other than carbon, hydrogen and oxygen containing halogens derived from polycarboxylic acids and polyhydroxy compounds
-
- 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
- C07C51/27—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with oxides of nitrogen or nitrogen-containing mineral acids
- C07C51/275—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with oxides of nitrogen or nitrogen-containing mineral acids of hydrocarbyl groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Monofluorophthalic acids are prepared by oxidising fluoroxylenes at elevated temperature and pressure with aqueous nitric acid. The oxidation is preferably carried out at 125-250 DEG C. using 20% nitric acid. In a modification of the process the nitric acid is replaced wholly or in part with nitrous gases. In examples monofluoroxylenes are heated in an autoclave with aqueous nitric acid or nitrogen dioxide and water. The monofluorophthalic acids are crystallised from the cooled reaction solution and filtered off.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED29792A DE1095803B (en) | 1959-01-17 | 1959-01-17 | Process for the preparation of monofluorobenzenedicarboxylic acids or their anhydrides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB918283A true GB918283A (en) | 1963-02-13 |
Family
ID=7040230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB143760A Expired GB918283A (en) | 1959-01-17 | 1960-01-14 | Process for the production of monofluorophthalic acids |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE586582A (en) |
| CH (1) | CH379482A (en) |
| DE (1) | DE1095803B (en) |
| GB (1) | GB918283A (en) |
-
1959
- 1959-01-17 DE DED29792A patent/DE1095803B/en active Pending
- 1959-12-16 CH CH8189059A patent/CH379482A/en unknown
-
1960
- 1960-01-14 GB GB143760A patent/GB918283A/en not_active Expired
- 1960-01-14 BE BE586582A patent/BE586582A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE586582A (en) | 1960-05-03 |
| DE1095803B (en) | 1960-12-29 |
| CH379482A (en) | 1964-07-15 |
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