Process for producing (meth)acrylic anhydride and process for producing (meth)acrylic ester
AssigneeMitsubishi Rayon Co., Ltd.
InventorsNaoshi Murata, Kimio Tamura, Yasukazu Yoshida, Motomu Ohkita
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Abstract
(Meth)acrylic acid is reacted with a fatty acid anhydride and the resultant reaction mixture is neutralized and washed with an aqueous alkaline solution having a pH of 7.5 to 13.5. Thus, high-purity (meth)acrylic anhydride can be industrially advantageously produced while avoiding polymerization. This (meth)acrylic anhydride is reacted with a secondary or tertiary alcohol in the presence of a basic compound which in 25° C. water has an acidity (pKa) of 11 or lower. Thus, a high-purity (meth)acrylic ester can be produced in high yield.
Claims19
A process for producing (meth)acrylic anhydride, comprising:
- a step of reacting (meth)acrylic acid with a fatty acid anhydride;
- and
- a step of neutralization-washing the resultant reaction mixture with an aqueous alkaline solution having a pH of 7.5 to 13.5.
Dependencies are inferred from the claim text.