GB1249198A - Preparation of terephthalic acid - Google Patents
Preparation of terephthalic acidInfo
- Publication number
- GB1249198A GB1249198A GB512369A GB512369A GB1249198A GB 1249198 A GB1249198 A GB 1249198A GB 512369 A GB512369 A GB 512369A GB 512369 A GB512369 A GB 512369A GB 1249198 A GB1249198 A GB 1249198A
- Authority
- GB
- United Kingdom
- Prior art keywords
- manganese
- cobalt
- bromine
- acid
- gram
- 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)
- Catalysts (AREA)
Abstract
1,249,198. Terephthalic acid. MITSUI PETROCHEMICAL INDUSTRIES Ltd. 30 Jan., 1969 [31 Jan., 1968], No. 5123/69. Heading C2C. Terephthalic acid is prepared by the liquid phase oxidation of p-xylene with molecular oxygen or molecular oxygen-containing gas at a temperature of 150‹ to 200‹ C. and a pressure of 3 to 15 kg./cm.<SP>2</SP>g. in the presence of a catalyst comprising cobalt, manganese and bromine characterized in that (i) the amount of manganese is from 2 x 10<SP>-7</SP> to less than 1 x 10<SP>-5</SP> gram-atom per gram of acetic acid, (ii) the amount of bromine is in the range 5 x 10<SP>-6</SP> to 5 x 10<SP>-5</SP> gram-atom per gram of acetic acid, (iii) the atomic ratio of cobalt to manganese (Co/Mn) is from 1 to 100. The cobalt and manganese may be present as one or more of their acetates, bromides, carbonates, naphthenates or acetylacetonates; the bromine may be present as one or more of hydrobromic acid, hydrogen, sodium, potassium, ammonium, manganese or cobalt bromides, methyl benzyl bromide, bromoacetic acid or tetrabromoethane.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP544168 | 1968-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1249198A true GB1249198A (en) | 1971-10-06 |
Family
ID=11611270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB512369A Expired GB1249198A (en) | 1968-01-31 | 1969-01-30 | Preparation of terephthalic acid |
Country Status (2)
Country | Link |
---|---|
ES (1) | ES363114A1 (en) |
GB (1) | GB1249198A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5032140A (en) * | 1973-07-28 | 1975-03-28 | ||
JPS51136642A (en) * | 1975-05-22 | 1976-11-26 | Kuraray Yuka Kk | Process for preparation of terephthalic acid |
FR2388595A1 (en) * | 1977-04-25 | 1978-11-24 | Ici Ltd | PROCESS FOR RECOVERING A CATALYTIC CONSTITUENT |
FR2408573A1 (en) * | 1977-11-14 | 1979-06-08 | Mitsubishi Chem Ind | PROCESS FOR PREPARING TEREPHTHALIC ACID |
FR2414490A1 (en) * | 1978-01-13 | 1979-08-10 | Ici Ltd | Terephthalic acid prodn. by oxidation of para-xylene - in acetic acid, using catalyst contg. cobalt, manganese and bromine |
-
1969
- 1969-01-30 GB GB512369A patent/GB1249198A/en not_active Expired
- 1969-01-30 ES ES363114A patent/ES363114A1/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5032140A (en) * | 1973-07-28 | 1975-03-28 | ||
JPS5328901B2 (en) * | 1973-07-28 | 1978-08-17 | ||
JPS51136642A (en) * | 1975-05-22 | 1976-11-26 | Kuraray Yuka Kk | Process for preparation of terephthalic acid |
JPS5621015B2 (en) * | 1975-05-22 | 1981-05-16 | ||
FR2388595A1 (en) * | 1977-04-25 | 1978-11-24 | Ici Ltd | PROCESS FOR RECOVERING A CATALYTIC CONSTITUENT |
FR2408573A1 (en) * | 1977-11-14 | 1979-06-08 | Mitsubishi Chem Ind | PROCESS FOR PREPARING TEREPHTHALIC ACID |
FR2414490A1 (en) * | 1978-01-13 | 1979-08-10 | Ici Ltd | Terephthalic acid prodn. by oxidation of para-xylene - in acetic acid, using catalyst contg. cobalt, manganese and bromine |
Also Published As
Publication number | Publication date |
---|---|
ES363114A1 (en) | 1970-12-01 |
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