| US 7,541,490 B2 | ||
| Method for production of acrylic acid and apparatus for production of acrylic acid | ||
| Kazuto Okazaki, Himeji (Japan); Yukihiro Matsumoto, Kobe (Japan); Kazuhiko Sakamoto, Himeji (Japan); and Osamu Dodo, Hyogo (Japan) | ||
| Assigned to Nippon Shokubai Co., Ltd., Osaka (Japan) | ||
| Filed on Nov. 17, 2006, as Appl. No. 11/601,417. | ||
| Application 11/601417 is a division of application No. 09/705661, filed on Nov. 03, 2000, granted, now 7,198,766. | ||
| Claims priority of application No. 11-315914 (JP), filed on Nov. 05, 1999. | ||
| Prior Publication US 2007/0066845 A1, Mar. 22, 2007 | ||
| Int. Cl. C07C 51/16 (2006.01); C07C 51/235 (2006.01) | ||
| U.S. Cl. 562—532 [562/545] | 7 Claims |
| 1. A method for the production of acrylic acid or acrolein, comprising gasifying liquefied propylene and/or propane introduced into an evaporator by supplying a liquid coolant to the evaporator and, at the same time, preparing a chilled coolant by recovering the latent heat of the liquefied propylene and/or propane, subjecting the resultant gasified propane and/or propylene to a catalytic gas phase oxidation reaction thereby preparing a gas containing acrylic acid or acrolein, and using said chilled coolant in heat exchangers attached to the apparatus for the production acrylic acid or acrolein. |