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1. (WO2018104875) A PROCESS FOR TREATMENT OF SPENT IONIC LIQUIDS
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CLAIMS:

1. A process for treatment a spent ionic liquids, said process comprising the following steps:

a. mixing said spent ionic liquid with a first fluid medium and water to obtain slurry comprising a solid fraction and a liquid fraction;

b. separating said solid fraction from said slurry by filtration to obtain a filtrate and a residue comprising hydrated ionic solids;

c. drying said residue comprising said hydrated ionic solids at a temperature in the range of 60 °C to 120 °C to obtain treated ionic solids; and

d. evaporating said filtrate to recover said first fluid medium.

2. The process as claimed in claim 1 , wherein said spent ionic liquid is halo-metallic based ionic liquid.

3. The process as claimed in claim 1, wherein said spent ionic liquid is at least one selected from the group consisting of chloroaluminate ionic liquid, imidazolium based chloroaluminate, phosphonium based chloroaluminate, pyridinium based chloroaluminate, N-methyl pyrrolidone based chloroaluminate, ammonium based chloroaluminate, substituted amine based chloroaluminate and combinations thereof.

4. The process as claimed in claim 3, wherein said chloroaluminate ionic liquid is N-methyl pyrrolidone based chloroaluminate.

5. The process as claimed in claim 3, wherein said chloroaluminate ionic liquid is a clathrate of benzene and A1(0H)3:A1C13;

wherein the molar ratio of Al(OH)3 : AICI3 is in the range of 1 : 2 to 1 : 3.5, and the amount of benzene is in the range of 5 wt% to 50 wt%.

6. The process as claimed in claim 1, wherein said first fluid medium is at least one selected from the group consisting of primary aldehydes, secondary aldehydes, ketones, esters and combinations thereof.

7. The process as claimed in claim 1, wherein the ratio of said first fluid medium to said spent ionic liquid is in the range of 1: 1 to 10:1 by volume.

8. The process as claimed in claim 1, wherein the ratio of said first fluid medium to water is in the range of 20: 1 to 5: 1 by weight.

9. The process as claimed in claim 1, wherein said step (c) further comprises a step of contacting said treated ionic solids with at least one second fluid medium to separate an active ionic liquid.

10. The process as claimed in claim 9, wherein said second fluid medium is at least one selected from the group consisting of water, dichloromethane, acetonitrile, alcohol, ketone, aldehyde, and ether.