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:
Jul. 28, 2020
Filed:
Dec. 27, 2018
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Yasushi Ogawa, Mie, JP;
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Abstract
Using a vertical multi-tube heat exchanger which includes a tubular body, an upper tube plate and a lower tube plate, a plurality of heat transfer tubes, and lid sections and in which the distillation gas introduced into a receiving chamber is cooled in the course of passing through the heat transfer tube and turns into a condensate, a solution containing polymerization inhibitor is introduced into the receiving chamber. Some of the plurality of heat transfer tubes have an upper end protruding above the upper tube plate, with the remainings being not protruding, and the solution containing polymerization inhibitor coming into contact with the distillation gas in the receiving chamber forms a liquid flow layer with a predetermined liquid depth on the upper tube plate.