MUMBAI, India, June 19 -- Intellectual Property India has published a patent application (202647067520 A) filed by Refine Holdings Co. , Ltd. on May 29, 2026, for Purification Method.
Inventors include Oda Akiyoshi; Kato Takamasa; and Ueda Atsushi.
The application for the patent was published on June 05, 2026, under issue no. 23/2026.
Abstract: Provided is a method for purifying N-methyl-2-pyrrolidone, with which impurities and water can be properly separated and removed. Specifically provided is a purification method for purifying a raw material containing N-methyl-2-pyrrolidone and water and also containing, as impurities, a low-boiling-point amine and methyl succinimide, the purification method comprising: a first distillation step fo...