GB297667A - Improvements in and relating to the manufacture of maleic acid and maleic anhydride - Google Patents
Improvements in and relating to the manufacture of maleic acid and maleic anhydrideInfo
- Publication number
- GB297667A GB297667A GB3979/28A GB397928A GB297667A GB 297667 A GB297667 A GB 297667A GB 3979/28 A GB3979/28 A GB 3979/28A GB 397928 A GB397928 A GB 397928A GB 297667 A GB297667 A GB 297667A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furfural
- air
- maleic anhydride
- maleic
- passed
- 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
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/313—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with molecular oxygen
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)
- Polyesters Or Polycarbonates (AREA)
- Furan Compounds (AREA)
Abstract
297,667. Boehringer, A., (trading as Boehringer Sohn, C. H.). Sept. 24, 1927, [Convention date]. Addition to 285,426. Maleic acid; maleic anhydride. - In the production of maleic acid and maleic anhydride by the catalytic oxidation of furane or its derivatives with oxygen or air as described in the parent Specification, the quantity of oxygen or air employed is a considerable excess such as 20-100 times the theoretical amount. The substance to be oxidized, such as furfural can be vaporized and mixed with the oxidizing gas, or steam may be passed through furfural heated to a suitable temperature and then led into the oxidizing gas, or the furfural may be atomized by air or steam in a space through which hot air is passed. The process may be effected at 50-250‹ C. at ordinary, increased, or reduced pressure, In an example 60 grams of furfural are vaporized in 4 hours and mixed with a current of air passing at 1.5 litres per second, the mixture being passed over vanadic acid on pumice stone at 180‹ C. Specifications 291,419 and 296,071 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE297667X | 1927-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB297667A true GB297667A (en) | 1929-05-08 |
Family
ID=6090748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3979/28A Expired GB297667A (en) | 1927-09-24 | 1928-02-08 | Improvements in and relating to the manufacture of maleic acid and maleic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB297667A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11912656B2 (en) | 2018-12-21 | 2024-02-27 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Oxidation of 5-hydroxy-2-furanone to maleates |
-
1928
- 1928-02-08 GB GB3979/28A patent/GB297667A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11912656B2 (en) | 2018-12-21 | 2024-02-27 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Oxidation of 5-hydroxy-2-furanone to maleates |
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