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:
Apr. 12, 2011
Filed:
Nov. 26, 2007
Hitoshi Kihara, Chiba, JP;
Takashi Kambe, Tsuchiura, JP;
Hitoshi Kihara, Chiba, JP;
Takashi Kambe, Tsuchiura, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Abstract
A distillation apparatus of the present invention includes a distillation column group in which a plurality of distillation columns including a condenser and a reboiler is connected in the form of a cascade; a gas-feeding line which feeds gas from the distillation column to a latter distillation column; a gas line which introduces the gas from the distillation column to the condenser attached to the distillation column; a liquid-line which withdraws a condensed liquid from the condenser; a liquid-reflux line which introduces a part of the condensed liquid from the liquid-line to the distillation column; a liquid-return line which returns the remainder of the condensed liquid from the liquid-line to a former distillation column; a valve provided on the liquid-return line; and a bypass line which connects the liquid-return line and the gas line so as to flow an evaporated gas generated in the liquid-return line to the gas line.