Patents Assigned to M/s. Jubilant Organosys Limited
  • Process for producing 4-dimethyl amino pyridine (4-DMAP)
    Patent number: 6939972
    Abstract: An improved process for producing 4-dimethyl amino pyridine is provided. The process comprises quaternizing pyridine with a suitable quaternizing agent in the presence of organic solvent, isolating the resulting salt and aminating the salt, N-[4-pyridyl] pyridinium chloride hydrochloride, with N,N-dimethyl formamide. The resultant reaction mass is hydrolysed in the presence of a base, extracted with an aromatic solvent and distilled under vacuum to produce 4-dimethyl amino pyridine.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: September 6, 2005
    Assignee: M/s. Jubilant Organosys Limited
    Inventors: Mahendra Kumar, Shailendra Kumar Singh, Ashutosh Agarwal