GB747417A - Improvements in or relating to the production of phthalic acids - Google Patents
Improvements in or relating to the production of phthalic acidsInfo
- Publication number
- GB747417A GB747417A GB18227/53A GB1822753A GB747417A GB 747417 A GB747417 A GB 747417A GB 18227/53 A GB18227/53 A GB 18227/53A GB 1822753 A GB1822753 A GB 1822753A GB 747417 A GB747417 A GB 747417A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitric acid
- phthalic acids
- relating
- production
- acids
- 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
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Phthalic acids are prepared by a method comprising oxidizing the corresponding toluic acids in liquid phase with aqueous nitric acid at a temperature within the range 150-250 DEG C. while maintaining the concentration of the aqueous nitric acid at 1.15 to 15 per cent by weight based on the water present throughout the oxidation. Preferably a molar ratio of nitric acid to toluic acids in the range 2:1 to 8:1 is used and the nitric acid fed into the mixture has a concentration of 10 per cent by weight. In the examples the process is carried out both batchwise and continuously using varying reaction conditions.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US747417XA | 1952-07-01 | 1952-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB747417A true GB747417A (en) | 1956-04-04 |
Family
ID=22121412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18227/53A Expired GB747417A (en) | 1952-07-01 | 1953-07-01 | Improvements in or relating to the production of phthalic acids |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE521093A (en) |
FR (1) | FR1107461A (en) |
GB (1) | GB747417A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3105091A (en) * | 1957-09-23 | 1963-09-24 | Farberke Hoechst Ag Vormals Me | Process for the manufacture of carboxylic acids |
US3165548A (en) * | 1960-01-14 | 1965-01-12 | Basf Ag | Continuous process for the production of aromatic and heterocyclic carboxylic acids |
US3173947A (en) * | 1954-05-12 | 1965-03-16 | Bergwerksverband Gmbh | Method for oxidizing organic substances |
-
0
- BE BE521093D patent/BE521093A/xx unknown
-
1953
- 1953-06-29 FR FR1107461D patent/FR1107461A/en not_active Expired
- 1953-07-01 GB GB18227/53A patent/GB747417A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3173947A (en) * | 1954-05-12 | 1965-03-16 | Bergwerksverband Gmbh | Method for oxidizing organic substances |
US3105091A (en) * | 1957-09-23 | 1963-09-24 | Farberke Hoechst Ag Vormals Me | Process for the manufacture of carboxylic acids |
US3165548A (en) * | 1960-01-14 | 1965-01-12 | Basf Ag | Continuous process for the production of aromatic and heterocyclic carboxylic acids |
Also Published As
Publication number | Publication date |
---|---|
BE521093A (en) | |
FR1107461A (en) | 1956-01-03 |
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