MUMBAI, India, June 19 -- Intellectual Property India has published a patent application (202647067524 A) filed by Refine Holdings Co. , Ltd. on May 29, 2026, for Purification Method.
Inventors include Oda Akiyoshi; Kato Takamasa; and Ozeki Yuichi.
The application for the patent was published on June 05, 2026, under issue no. 23/2026.
Abstract: Provided is a purification method for N-methyl-2-pyrrolidone that makes it possible to appropriately control an addition amount for an alkali compound and also makes it possible to separate and remove water and impurities. According to the present invention, a purification method for purifying a starting material that contains N- methyl-2-pyrrolidone and water and also contains a low-boiling-point...