Patents Assigned to Indian Petrochemicals Corporation Limited
  • Process for the purification or regeneration of contaminated or spent process sulfolane
    Patent number: 5053137
    Abstract: There is provided a process for the regeneration and/or purification of contaminated process sulfolane or spent sulfolane. The process includes passing contaminated or spent sulfolane through a pair of columns arranged in series, with the first of the columns containing cation exchanger resin and the second containing anion exchanger resin. The contact between the sulfolane and the ion exchange resins is effected at a temperature of from 20.degree. to 80.degree. C.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: October 1, 1991
    Assignee: Indian Petrochemicals Corporation Limited
    Inventors: Raj K. J. Lal, S. G. T. Bhat