GB1200571A - Liquid-phase oxidation of ortho-xylene - Google Patents
Liquid-phase oxidation of ortho-xyleneInfo
- Publication number
- GB1200571A GB1200571A GB1561469A GB1561469A GB1200571A GB 1200571 A GB1200571 A GB 1200571A GB 1561469 A GB1561469 A GB 1561469A GB 1561469 A GB1561469 A GB 1561469A GB 1200571 A GB1200571 A GB 1200571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reaction zone
- acetic acid
- stream
- xylene
- recovering
- 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
1,200,571. Phthalic acid. STANDARD OIL CO. 25 March, 1969 [27 March, 1968], No. 15614/69. Heading C2C. A process for the continuous oxidation of o-xylene to phthalic acid in the liquid phase comprises charging o-xylene, a heavy metal catalyst e.g. Co and/or Mn and a source of bromine and acetic acid as solvent to a reaction zone, passing in a molecular oxygen-containing gas while maintaining a temperature in the range of 300‹ to 475‹ F. and a catalyst concentration based on the solvent in the range 0À01 to 1À0 per cent by weight for the heavy metal and for the bromine, maintaining an elevated pressure sufficient to maintain the reaction mixture substantially in the liquid phase while venting continuously from said reaction zone a vapour stream containing acetic acid and water vapour, passing said vapour stream to a separation zone and recovering therefrom a dehydrated acetic acid stream containing less then 3% by weight of water and recycling said stream to the reaction zone; continuously with drawing from the reaction zone a product stream and separating and recovering phthalic acid therefrom while recovering dehydrated acetic acid containing less than 3% by weight of water therefrom and recycling to said reaction zone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71642868A | 1968-03-27 | 1968-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1200571A true GB1200571A (en) | 1970-07-29 |
Family
ID=24877958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1561469A Expired GB1200571A (en) | 1968-03-27 | 1969-03-25 | Liquid-phase oxidation of ortho-xylene |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE730590A (en) |
| DE (1) | DE1915690A1 (en) |
| FR (1) | FR2004875A1 (en) |
| GB (1) | GB1200571A (en) |
| NL (1) | NL6904677A (en) |
-
1969
- 1969-03-25 GB GB1561469A patent/GB1200571A/en not_active Expired
- 1969-03-26 NL NL6904677A patent/NL6904677A/xx unknown
- 1969-03-27 DE DE19691915690 patent/DE1915690A1/en active Pending
- 1969-03-27 BE BE730590D patent/BE730590A/en not_active IP Right Cessation
- 1969-03-27 FR FR6909150A patent/FR2004875A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE730590A (en) | 1969-09-01 |
| DE1915690A1 (en) | 1969-10-09 |
| NL6904677A (en) | 1969-09-30 |
| FR2004875A1 (en) | 1969-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |