IN257678: An improved process for the recovery of extraction solvent form brine solution
Abstract
The invention relates to an improved process for the recovery of extraction solvent from brine solution. This invention particularly relates to the recovery of N-methylpyrolidone (NMP) and sulpholane from brine solution. The process provides for the recovery of extraction solvents like Sulpholane, N-methylpyrolidone (NMP) from brine solutions i.e solutions containing; 50 percent water and salt content as high as 30,000 ppm wt. In addition, the invention provides a process for the recovery of extraction solvent by liquid-liquid extraction technique using light polar hydrocarbons like alcohol, ethyl glycol ethers etc., particularly low boiling aromatics hydrocarbons.
Filing Date:
31-03-2005
Issue Date:
25-10-2013
Applicant:
CSIR-Indian Institute of Petroleum (CSIR-IIP), Dehradun
Patent No:
IN257678
Application No:
0771DEL2005
Inventor(s):
M.O Garg,M.K Khuanna,Guru Prasad,B.R Nautiyal,S.M Nanoti,Dharam Paul
IPC Classification:
C07C7/04
Country:
India
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