GB821980A - Process for the production of acrylic acid - Google Patents
Process for the production of acrylic acidInfo
- Publication number
- GB821980A GB821980A GB25256/57A GB2525657A GB821980A GB 821980 A GB821980 A GB 821980A GB 25256/57 A GB25256/57 A GB 25256/57A GB 2525657 A GB2525657 A GB 2525657A GB 821980 A GB821980 A GB 821980A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barium
- copper oxide
- precipitated
- silica
- maleic acid
- 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
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
- C07C51/38—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups by decarboxylation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A catalyst comprises iron-free colloidal silica, freshly precipitated copper oxide and a waterinsoluble barium compound. The barium compound, which may be barium naphthenate or barium carbonate, is between 1 and 50% of the copper present as oxide, and the copper oxide is between 5 and 30% of the silica. The catalyst may also contain 10 to 20% by weight of sodium silicate based on the weight of silica. In examples, catalysts are obtained by mixing a suspension of colloidal silica with precipitated copper oxide and precipitated barium naphthenate or barium carbonate, and drying and crushing.ALSO:Acrylic acid is prepared by passing a mixture of steam and maleic acid vapour at a temperature of 200 DEG to 300 DEG C. over a catalyst comprising iron-free colloidal silica, freshly precipitated copper oxide and a water-insoluble barium compound. The vapour mixture contains 0.5 to 8 per cent of oxygen, and the ratio of water to maleic acid is between 1.5 and 3 : 1. The p barium compound, which may be barium naphthenate or barium carbonate, is between 1 and 50 per cent of the copper present as oxide, and the copper oxide is between 5 and 30 per cent of the silica. The catalyst may also contain sodium silicate. In examples a mixture of oxygen with steam and maleic acid vapour, obtained by boiling a solution of maleic acid, is passed over catalysts obtained by mixing a suspension of colloidal silica with precipitated copper oxide and precipitated barium naphthenate or barium carbonate, and drying and crushing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE821980X | 1956-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB821980A true GB821980A (en) | 1959-10-14 |
Family
ID=3881517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25256/57A Expired GB821980A (en) | 1956-08-31 | 1957-08-09 | Process for the production of acrylic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB821980A (en) |
-
1957
- 1957-08-09 GB GB25256/57A patent/GB821980A/en not_active Expired
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