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:
May. 26, 2020
Filed:
Nov. 16, 2018
Applicant:
Daicel Corporation, Osaka-shi, Osaka, JP;
Inventors:
Assignee:
DAICEL CORPORATION, Osaka-Shi, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/40 (2006.01); B01D 3/36 (2006.01); B01D 3/14 (2006.01); B01D 3/42 (2006.01); C07C 51/44 (2006.01); C07C 51/12 (2006.01);
U.S. Cl.
CPC ...
B01D 3/40 (2013.01); B01D 3/148 (2013.01); B01D 3/36 (2013.01); B01D 3/4255 (2013.01); B01D 3/4261 (2013.01); C07C 51/12 (2013.01); C07C 51/44 (2013.01);
Abstract
A process for separating or removing permanganate reducing compounds (PRC's) from a first mixture containing at least one PRC, methyl iodide, and water comprises the steps of: feeding the first mixture to a feed port of a distillation column, and distilling and separating the first mixture into an upper stream and a lower stream, wherein the distillation of the first mixture forms a second mixture at an upper position than the feed port, and the process further comprises the steps of: withdrawing the second mixture as the upper stream, and withdrawing the lower stream from a lower position than the feed port.