Method and apparatus for absorbing (meth) acrylic acid
AssigneeNippon Shokubai Co., Ltd.
InventorHarunori Hirao
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Abstract
The object of the present invention is to provide a method to suppress changes the concentration of (meth)acrylic acid in the bottom solution discharged from the absorption column, and to enable stable operation for separating and purifying (meth)acrylic acid in the subsequent steps onward. The above-mentioned object can be achieved by way of changing the water amount contained in the gas exhausted from the top portion of the absorption column.
Claims12
A method for absorbing (meth)acrylic acid, in a manufacturing process for (meth)acrylic acid including steps adapted to manufacture a gas containing (meth)acrylic acid by employing a catalytic gas-phase oxidation reaction and to subsequently introduce the gas into the absorption column for absorbing a target product in a form of the solution by using an absorbent containing water as the main component, wherein the concentration of (meth)acrylic acid in a bottom solution discharged from an absorption column is controlled by changing the water amount contained in the gas which is exhausted from the top portion of the absorption column.
Dependencies are inferred from the claim text.