GB798456A - Maleic anhydride recovery - Google Patents
Maleic anhydride recoveryInfo
- Publication number
- GB798456A GB798456A GB1325756A GB1325756A GB798456A GB 798456 A GB798456 A GB 798456A GB 1325756 A GB1325756 A GB 1325756A GB 1325756 A GB1325756 A GB 1325756A GB 798456 A GB798456 A GB 798456A
- Authority
- GB
- United Kingdom
- Prior art keywords
- maleic anhydride
- maleic acid
- acid solution
- gases
- gas stream
- 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
- C07C51/54—Preparation of carboxylic acid anhydrides
- C07C51/573—Separation; Purification; Stabilisation; Use of additives
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
Maleic anhydride is recovered from gases obtained by the vapour phase catalytic oxidation of organic compounds by injecting continuously into the hot gas stream a solution containing 35-75, preferably 50-65 per cent by weight of maleic acid, cooling the vapours to condense maleic anhydride but not water, usually at 60-100, preferably 70-80 DEG C., scrubbing the remaining vapours with a 35-75 per cent maleic acid solution to remove uncondensed maleic anhydride, and recycling the maleic acid solution for injection into the hot gas stream. The hot gases are preferably at a temperature of 200-300 DEG C. before injection of maleic acid solution; the latter is preferably formed and recycled at a temperature of 35-90 DEG C., more preferably at 50-70 DEG C. In an example, the gases from the oxidation of benzene with air at 435 DEG C. are cooled to 245 DEG C. and treated as above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1325756A GB798456A (en) | 1956-04-30 | 1956-04-30 | Maleic anhydride recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1325756A GB798456A (en) | 1956-04-30 | 1956-04-30 | Maleic anhydride recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB798456A true GB798456A (en) | 1958-07-23 |
Family
ID=10019677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1325756A Expired GB798456A (en) | 1956-04-30 | 1956-04-30 | Maleic anhydride recovery |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB798456A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1216867B (en) * | 1962-01-02 | 1966-05-18 | Harpener Bergbau Ag | Process for the production of maleic anhydride from the gases produced by the oxidation of benzene |
| US5585502A (en) * | 1993-02-08 | 1996-12-17 | Sisas Societa' Italiana Serie Acetica E Sintetica Spa | Process and plant for the purification of raw maleic anhydride recovered from gaseous reaction mixtures |
-
1956
- 1956-04-30 GB GB1325756A patent/GB798456A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1216867B (en) * | 1962-01-02 | 1966-05-18 | Harpener Bergbau Ag | Process for the production of maleic anhydride from the gases produced by the oxidation of benzene |
| US5585502A (en) * | 1993-02-08 | 1996-12-17 | Sisas Societa' Italiana Serie Acetica E Sintetica Spa | Process and plant for the purification of raw maleic anhydride recovered from gaseous reaction mixtures |
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