GB851562A - Process for the production of terephthalic acid - Google Patents
Process for the production of terephthalic acidInfo
- Publication number
- GB851562A GB851562A GB1597058A GB1597058A GB851562A GB 851562 A GB851562 A GB 851562A GB 1597058 A GB1597058 A GB 1597058A GB 1597058 A GB1597058 A GB 1597058A GB 851562 A GB851562 A GB 851562A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reaction
- acetate
- iron
- manganese
- zinc
- 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
A process for the production of terephthalic acid by interaction in the liquid phase of an aliphatic para disubstituted benzene and molecular oxygen in the presence of bromine and a catalyst containing cobalt or manganese at a temperature above 165 DEG C. is characterised in that there is added at least one of the following:-nickel, copper, zinc, tin and iron, or a compound of one of these metals, in such amount as provides in the reaction mixture a concentration of nickel exceeding 100 parts per million, or a concentration of copper between 25 and 150 p.p.m., or of zinc between 1,000 and 5,000 p.p.m., or of tin between 100 and 1,000 p.p.m., or of iron not more than 1,000 p.p.m. Preferably an excess of oxygen is maintained continuously in the reaction system. Preferably a catalyst containing both cobalt and manganese is used and the reaction is carried out in an inert medium such as acetic acid or water. The reaction may be carried out in titanium, silver, or glass lined equipment, or in steel reactors, e.g. of nickelsteel alloys. Examples describe the production of terephthalic acid from mixtures of p-xylene, glacial acetic acid, cobalt bromide, manganese bromide or acetate, and various proportions of nickel carbonate or acetate, copper sulphate, zinc acetate, stannous chloride, and ferric acetate. When the reaction is carried out in a steel reactor it is not necessary to add iron directly but the content of iron in the reaction mixture should be controlled within the specified limit, e.g. by by-passing mother liquors through an ionexchange resin before re-cycling. Specifications 737,439, 787,937, 804,612, 807,091, 810,020, 841,246 and 850,960 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1597058A GB851562A (en) | 1958-05-19 | 1958-05-19 | Process for the production of terephthalic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1597058A GB851562A (en) | 1958-05-19 | 1958-05-19 | Process for the production of terephthalic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB851562A true GB851562A (en) | 1960-10-19 |
Family
ID=10068863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1597058A Expired GB851562A (en) | 1958-05-19 | 1958-05-19 | Process for the production of terephthalic acid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB851562A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2420960A1 (en) * | 1973-05-21 | 1974-12-12 | Standard Oil Co | PROCESS FOR OXYDATION OF DI- OR TRIMETHYLBENZENE WITH MOLECULAR OXYGEN |
WO2017068487A1 (en) * | 2015-10-23 | 2017-04-27 | Sabic Global Technologies B.V. | Process for producing terephthalic acid |
-
1958
- 1958-05-19 GB GB1597058A patent/GB851562A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2420960A1 (en) * | 1973-05-21 | 1974-12-12 | Standard Oil Co | PROCESS FOR OXYDATION OF DI- OR TRIMETHYLBENZENE WITH MOLECULAR OXYGEN |
WO2017068487A1 (en) * | 2015-10-23 | 2017-04-27 | Sabic Global Technologies B.V. | Process for producing terephthalic acid |
CN108137466A (en) * | 2015-10-23 | 2018-06-08 | 沙特基础工业全球技术有限公司 | For producing the method for terephthalic acid (TPA) |
US10676420B2 (en) | 2015-10-23 | 2020-06-09 | Sabic Global Technologies B.V. | Process for producing terephthalic acid |
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