The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2014
Filed:
Feb. 09, 2010
Takeyuki Kondo, Hitachi, JP;
Hiroyuki Ito, Tokyo, JP;
Yasunari Sase, Tokyo, JP;
Toshiaki Matsuo, Mito, JP;
Kenichiro Oka, Mito, JP;
Masayuki Kamikawa, Hitachinaka, JP;
Masashi Tanto, Tokyo, JP;
Takeyuki Kondo, Hitachi, JP;
Hiroyuki Ito, Tokyo, JP;
Yasunari Sase, Tokyo, JP;
Toshiaki Matsuo, Mito, JP;
Kenichiro Oka, Mito, JP;
Masayuki Kamikawa, Hitachinaka, JP;
Masashi Tanto, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide a technology which can suppress the blockage and abrasion of pipes and devices caused by the production of by-products and stably synthesize acrolein at a high yield, under a condition in which energy efficiency is improved by an elevated concentration of glycerol in a reaction liquid, in a process for synthesis of acrolein by reacting supercritical water and an acid with glycerol. An embodiment of the present invention includes: setting a concentration of glycerol in the reaction liquid at 30% by weight or lower; also cooling the reaction liquid to a temperature between a temperature (300° C. or lower) at which the reaction stops and a temperature (100° C. or higher) at which tar contained in the reaction liquid can keep a state in which its viscosity is sufficiently low; then separating and removing carbon particles from the reaction liquid; subsequently cooling the reaction liquid to a temperature which is a boiling point of water or lower and at which the tar component in the reaction liquid does not adhere to devices; and then decompressing the cooled reaction liquid.