Acryl- und Methacrylverbindungen

Methacrylic Acid and Derivatives

“…The most common approach to methacrylic acid synthesis is the hydrolysis of methacrylamide sulfate, obtained from acetone cyanohydrin [6], [7], [23]. Methyl methacrylate may be prepared directly in a similar way by adding methanol in the final reaction step.…”

“…Methacryloyl chloride [920- Methacrylamide is most conveniently prepared by reaction of acetone cyanohydrin with sulfuric acid [6], [32], [33]. Crude methacrylamide sulfate prepared as described in Section 3.1 is first neutralized with ammonia, after which water is added.…”

“…The cyanohydrin was converted to ethyl α-hydroxyisobutyrate by treatment with ethanol and dilute sulfuric acid. This was then dehydrated using P 2 O 5 [3][4][5][6][7]. In 1934 a patent was issued to ICI for the conversion of acetone cyanohydrin to methacrylamide sulfate using concentrated sulfuric acid [8].…”

Methacrylic Acid and Derivatives

“…Although additional isobutene-based methacrylic acid capacity is anticipated in Japan, and a new ethylene-based facility is under construction by BASF in Ludwigshafen, most of the world demand for methyl methacrylate (1.4Â10 6 …”

“…The cyanohydrin was converted to ethyl a-hydroxyisobutyrate by treatment with ethanol and dilute sulfuric acid. This was then dehydrated using P 2 O 5 [3][4][5][6][7]. In 1934 a patent was issued to ICI for the conversion of acetone cyanohydrin to methacrylamide sulfate using concentrated sulfuric acid [8].…”