GB993712A - Purification and recovery of maleic anhydride - Google Patents
Purification and recovery of maleic anhydrideInfo
- Publication number
- GB993712A GB993712A GB2637161A GB2637161A GB993712A GB 993712 A GB993712 A GB 993712A GB 2637161 A GB2637161 A GB 2637161A GB 2637161 A GB2637161 A GB 2637161A GB 993712 A GB993712 A GB 993712A
- Authority
- GB
- United Kingdom
- Prior art keywords
- maleic anhydride
- condensed
- overhead
- recover
- purification
- 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)
- Furan Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Crude maleic anhydride is purified by fractionating it to recover pure maleic anhydride overhead, the product of the initial alkali metal ion content (calculated as p.p.m. by wt. of Na) multiplied by the residence time in hours at distillation temperature in order to recover overhead 95% of the maleic anhydride content being less than 4,000. The crude material may be obtained by oxidizing an appropriate hydrocarbon, e.g. benzene, with an excess of air, the major part of the maleic anhydride condensed from the hot gaseous reaction product, the remainder absorbed in water to form maleic acid, which is dehydrated by distilling with an azeotroping agent e.g. xylene, and the maleic anhydride obtained mixed with the condensed maleic anhydride, and distilled as described above. Examples are given. Specification 853,846 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4428160A | 1960-07-21 | 1960-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB993712A true GB993712A (en) | 1965-06-02 |
Family
ID=21931489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2637161A Expired GB993712A (en) | 1960-07-21 | 1961-07-20 | Purification and recovery of maleic anhydride |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE606201A (en) |
| CH (1) | CH419096A (en) |
| DE (1) | DE1443113C3 (en) |
| ES (1) | ES269249A1 (en) |
| GB (1) | GB993712A (en) |
| LU (1) | LU40405A1 (en) |
| SE (1) | SE307349B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4961827A (en) * | 1985-02-07 | 1990-10-09 | Basf Aktiengesellschaft | Obtaining very pure maleic anhydride from crude maleic anhydride |
-
1961
- 1961-07-17 BE BE606201A patent/BE606201A/en unknown
- 1961-07-17 LU LU40405D patent/LU40405A1/xx unknown
- 1961-07-20 ES ES0269249A patent/ES269249A1/en not_active Expired
- 1961-07-20 GB GB2637161A patent/GB993712A/en not_active Expired
- 1961-07-21 DE DE19611443113 patent/DE1443113C3/en not_active Expired
- 1961-07-21 CH CH860261A patent/CH419096A/en unknown
- 1961-07-21 SE SE752861A patent/SE307349B/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4961827A (en) * | 1985-02-07 | 1990-10-09 | Basf Aktiengesellschaft | Obtaining very pure maleic anhydride from crude maleic anhydride |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1443113A1 (en) | 1969-04-10 |
| SE307349B (en) | 1969-01-07 |
| BE606201A (en) | 1961-11-16 |
| DE1443113B2 (en) | 1973-05-17 |
| DE1443113C3 (en) | 1973-12-20 |
| ES269249A1 (en) | 1961-12-16 |
| CH419096A (en) | 1966-08-31 |
| LU40405A1 (en) | 1961-09-18 |
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