| abstract |
The present invention provides a method for stabilizing waste oilnwhich is taken out of each chemical apparatus of the manufacturing line ofn(meth)acrylic acid and/or ester thereof, and treating the waste oil such asndraining it out of the production apparatus, for example, a distillation towernfrom its bottom, sending and transporting it by a pump through a pipeline,nand storing it in a storage tank in a simple manner, while keeping the wastenoil in a stable state. The waste oil can be stabilized by coexisting withnsolvent. n The solvent used in the present invention is typically at least onenselected from the group consisting of water, alcohol, ether, carboxylic acid,nketone, aromatic hydrocarbons, and aliphatic hydrocarbons. |