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:
Oct. 20, 2026
Filed:
May. 31, 2021
Nippon Shokubai Co., Ltd., Osaka, JP;
Yuki Kase, Hyogo, JP;
Takashi Sugimoto, Hyogo, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
A method for producing an easily polymerizable compound, comprising a step of introducing an easily polymerizable compound-containing liquid into a vaporization separation column () selected from a distillation column and a stripping column to purify, wherein: the vaporization separation column () is provided with a circulation path () for returning a drawn liquid, obtained by withdrawing at least a part of a bottom liquid () of the column, to the vaporization separation column (); the circulation path () is provided with a reboiler () having a heating part () and a supply port () for supplying an oxygen-containing gas on an upstream side of the reboiler (); the supply port () is located below an inlet of the heating part () with a height difference of 0.5 m or more; and an oxygen-containing gas is supplied to the drawn liquid from the supply port ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile