JPS55359A - Production of methacrylic acid - Google Patents
Production of methacrylic acidInfo
- Publication number
- JPS55359A JPS55359A JP2845979A JP2845979A JPS55359A JP S55359 A JPS55359 A JP S55359A JP 2845979 A JP2845979 A JP 2845979A JP 2845979 A JP2845979 A JP 2845979A JP S55359 A JPS55359 A JP S55359A
- Authority
- JP
- Japan
- Prior art keywords
- oxidation
- fore
- stage
- catalyst
- gas
- 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.)
- Pending
Links
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 title abstract 2
- 230000003647 oxidation Effects 0.000 abstract 8
- 238000007254 oxidation reaction Methods 0.000 abstract 8
- 239000003054 catalyst Substances 0.000 abstract 4
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 abstract 2
- 230000003197 catalytic effect Effects 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 229910052698 phosphorus Inorganic materials 0.000 abstract 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- STNJBCKSHOAVAJ-UHFFFAOYSA-N Methacrolein Chemical compound CC(=C)C=O STNJBCKSHOAVAJ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: Isobutylene is subjected to gas-phase catalytic oxidation in the presence of a specific fore-stage oxidation catalyst to form methacrolein, which is subsequently to gas-phase catalytic oxidation in the presence of another specific oxidation catalyst to produce methacrylic acid in higher yield than in the process directly combining the fore and the latter stage oxidations.
CONSTITUTION: The fore-stage oxidation of isobutylene with molecular oxygen is conducted in the presence of a catalyst that consists of elements selected from Mo, Bi, Fe, O and Co, or Ni, and K-Rb-Cs-Tl an the essential components, and P, As, and B as the optional components. Then, the produced gas, without separation, is subjected to the latter-stage oxidation in the presence of another catalyst consisting of P, Mo and O as the essential components. The reaction temperatures employed in the fore- and latter-stage oxidation is 250W700, preferably 250W550°C and the pressure is 1W10 atmospheric pressure.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2845979A JPS55359A (en) | 1979-03-12 | 1979-03-12 | Production of methacrylic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2845979A JPS55359A (en) | 1979-03-12 | 1979-03-12 | Production of methacrylic acid |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9366176A Division JPS5319188A (en) | 1976-08-06 | 1976-08-06 | Olefin oxidation catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55359A true JPS55359A (en) | 1980-01-05 |
Family
ID=12249242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2845979A Pending JPS55359A (en) | 1979-03-12 | 1979-03-12 | Production of methacrylic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55359A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178720B2 (en) | 2006-03-10 | 2012-05-15 | Mitsubishi Rayon Co., Ltd. | Method for producing unsaturated aldehyde and unsaturated carboxylic acid |
-
1979
- 1979-03-12 JP JP2845979A patent/JPS55359A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8178720B2 (en) | 2006-03-10 | 2012-05-15 | Mitsubishi Rayon Co., Ltd. | Method for producing unsaturated aldehyde and unsaturated carboxylic acid |
| US8329942B2 (en) | 2006-03-10 | 2012-12-11 | Mitsubishi Rayon Co., Ltd. | Method for producing unsaturated aldehyde and unsaturated carboxylic acid |
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