JPS5466620A - Preparation of methacrylic ester - Google Patents
Preparation of methacrylic esterInfo
- Publication number
- JPS5466620A JPS5466620A JP13125777A JP13125777A JPS5466620A JP S5466620 A JPS5466620 A JP S5466620A JP 13125777 A JP13125777 A JP 13125777A JP 13125777 A JP13125777 A JP 13125777A JP S5466620 A JPS5466620 A JP S5466620A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- gaseous phase
- catalyst
- methacrylic
- isobutyrate
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
PURPOSE: To obtain the title compound of high purity, by catalytic oxidation and dehydrogenation of isobutyric acid in the gaseous phase in the presence of a catalyst to form methacrylic acid, followed by reaction with a lower alcohol in the gaseous phase in the presence of a catalyst.
CONSTITUTION: Isobytyric acid is oxidized and dehydrogenated with O2 in the gaseous phase in the presence of a hetero-poly-acid catalyst consisting of P as central atom to form crude methacrylic acid, which is esterified with a lower alcohol in the gaseous phase in the presence of a silica -tiania solid acid catalyst to give crude a methacrylic ester together with an isobutyrate from the unreacted isobutyric acid. These esters are distilled and purified, and the separated isobutyrate is recycled to the oxidation and dehydrogenation step to give the objective compound of high purity.
EFFECT: Reuse of unreacted methacrylic acid and isobutyric acid in the estenification is unnecessary, and only separation from the ester is required.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13125777A JPS5466620A (en) | 1977-11-01 | 1977-11-01 | Preparation of methacrylic ester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13125777A JPS5466620A (en) | 1977-11-01 | 1977-11-01 | Preparation of methacrylic ester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5466620A true JPS5466620A (en) | 1979-05-29 |
Family
ID=15053678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13125777A Pending JPS5466620A (en) | 1977-11-01 | 1977-11-01 | Preparation of methacrylic ester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5466620A (en) |
-
1977
- 1977-11-01 JP JP13125777A patent/JPS5466620A/en active Pending
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