| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing acrylic acid or the like and an apparatus for producing the same, which effectively utilize latent heat generated in a production process. SOLUTION: A cold heat medium is prepared from a heat medium using latent heat generated when gasifying liquefied propylene or the like, and this is used in a heat exchanger used in the production process of acrylic acid or acrolein. According to this method, the latent heat that has been conventionally discarded can be effectively used, and the cooling energy separately required in the manufacturing process can be reduced. In addition, by recovering the cooling medium using a liquid heating medium, gasification of propylene or the like can be stabilized, and thus the production of acrylic acid can be stabilized. |