GB842142A - Improvements in or relating to the preparation of benzoic acid from cumene - Google Patents
Improvements in or relating to the preparation of benzoic acid from cumeneInfo
- Publication number
- GB842142A GB842142A GB2926656A GB2926656A GB842142A GB 842142 A GB842142 A GB 842142A GB 2926656 A GB2926656 A GB 2926656A GB 2926656 A GB2926656 A GB 2926656A GB 842142 A GB842142 A GB 842142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- benzoic acid
- bromide
- acid
- cumene
- oxygen
- 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
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl 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
Benzoic acid is made by oxidising cumene by means of oxygen or an oxygen-containing gas in the presence of an oxidation catalyst, the reaction being carried out in a liquid medium, which is stable under the oxidation conditions used, and n the conjoint presence of a metal ion and a bromide ion. The liquid medium may be a carboxylic acid such as benzoic acid, acetic acid or propionic acid. The catalyst may be a metallic oxide or salt, e.g. manganese acetate or cobalt acetate. The salt may comprise both the catalytic metal ion and the bromide ion, e.g. manganese bromide, or cobalt bromide. When benzoic acid is used as the liquid medium, the process may be integrated with that for the production of terephthalic acid. Benzene is propylated to cumene, which is converted into benzoic acid by the process of the invention. The benzoic acid is then converted into terephthalic acid, via the potassium salt; the byproduct of this step being benzene which is recycled to the propylation step. In an example, oxygen is led, at the rate of 5 litres per hour, for 10 hours into a mixture of cumene (1 part), benzoic acid (5 parts), manganese bromide (0,005 parts) and cobalt bromide (0,005 parts) maintained under reflux. The yield of benzoic acid is 90%. Specification 833,438 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2926656A GB842142A (en) | 1956-09-25 | 1956-09-25 | Improvements in or relating to the preparation of benzoic acid from cumene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2926656A GB842142A (en) | 1956-09-25 | 1956-09-25 | Improvements in or relating to the preparation of benzoic acid from cumene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB842142A true GB842142A (en) | 1960-07-20 |
Family
ID=10288806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2926656A Expired GB842142A (en) | 1956-09-25 | 1956-09-25 | Improvements in or relating to the preparation of benzoic acid from cumene |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB842142A (en) |
-
1956
- 1956-09-25 GB GB2926656A patent/GB842142A/en not_active Expired
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