Method for producing (meth)acrylic acid
An object of this invention is to provide a method for producing acrylic acid that enables to suppress adverse influence of byproducts during distillation and to accomplish long-term continuous operation of the acrylic acid production apparatus. This invention is directed to a method for producing (...
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| Hauptverfasser: | , , |
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | An object of this invention is to provide a method for producing acrylic acid that enables to suppress adverse influence of byproducts during distillation and to accomplish long-term continuous operation of the acrylic acid production apparatus. This invention is directed to a method for producing (meth)acrylic acid comprising the step of isolating (meth)acrylic acid from a liquid containing (meth)acrylic acid by distillation wherein the liquid contains glyoxal (including its hydrate) in a concentration of 0.1 mass% or less. This is accomplished by separating glyoxal from said liquid by reverse osmosis. |
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