JPS5461116A - Preparation of methacrylic acid - Google Patents
Preparation of methacrylic acidInfo
- Publication number
- JPS5461116A JPS5461116A JP12722377A JP12722377A JPS5461116A JP S5461116 A JPS5461116 A JP S5461116A JP 12722377 A JP12722377 A JP 12722377A JP 12722377 A JP12722377 A JP 12722377A JP S5461116 A JPS5461116 A JP S5461116A
- Authority
- JP
- Japan
- Prior art keywords
- methacrylic acid
- hydrolysis
- mol
- maintaining
- concentration
- 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.)
- Granted
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain methacrylic acid in high yield, by the hydrolysis of the product, obtained by the reaction of acetone cyanohydrin with H2SO4 in the presence of a polymerization inhibitor, maintaining the O2 concentration of the gaseous phase in the hydrolysis vessel at a specific value to inhibit polymerization.
CONSTITUTION: Methacrylic acid is obtained by the hydrolysis of methacrylamide sulfate, prepared by the reaction of acetone cyanohydrin with H2SO4 in an inert gas, e.g. N2, in the presence of a polymerization inhibitor, at 80W150°C for 30 min-5 hr, maintaining the O2 concentration of the gaseous phase in the hydrolysis vessel ≤1 mol%, preferably ≤0.1 mol%.
USE: Monomer of methacrulic acid copolymers useful for paints, adhesives, textile finish, etc.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12722377A JPS6054938B2 (en) | 1977-10-25 | 1977-10-25 | Method for producing methacrylic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12722377A JPS6054938B2 (en) | 1977-10-25 | 1977-10-25 | Method for producing methacrylic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5461116A true JPS5461116A (en) | 1979-05-17 |
JPS6054938B2 JPS6054938B2 (en) | 1985-12-03 |
Family
ID=14954766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12722377A Expired JPS6054938B2 (en) | 1977-10-25 | 1977-10-25 | Method for producing methacrylic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6054938B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61170734A (en) * | 1985-01-25 | 1986-08-01 | Toray Ind Inc | Preparation of fluoroalkyl alpha-chloroacrylate |
JP2004155757A (en) * | 2002-05-01 | 2004-06-03 | Rohm & Haas Co | Improved process for methacrylic acid and methacrylic acid ester production |
JP2011514374A (en) * | 2008-03-20 | 2011-05-06 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング | Purification method of methacrylic acid |
-
1977
- 1977-10-25 JP JP12722377A patent/JPS6054938B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61170734A (en) * | 1985-01-25 | 1986-08-01 | Toray Ind Inc | Preparation of fluoroalkyl alpha-chloroacrylate |
JPH0582378B2 (en) * | 1985-01-25 | 1993-11-18 | Toray Industries | |
JP2004155757A (en) * | 2002-05-01 | 2004-06-03 | Rohm & Haas Co | Improved process for methacrylic acid and methacrylic acid ester production |
JP2011514374A (en) * | 2008-03-20 | 2011-05-06 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング | Purification method of methacrylic acid |
Also Published As
Publication number | Publication date |
---|---|
JPS6054938B2 (en) | 1985-12-03 |
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