Process for high purity hexane and production thereof
AssigneeIndian Oil Corporation Limited
InventorsPrakash Bhagwant Bhalavi, Irudayaraj Devotta, Naduhatty Selai Raman, Brijesh Kumar, Biswapriya Das
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Abstract
The invention relates to the production of High purity n-hexane from low value stream such as raffinate from benzene extraction unit in crude oil refineries employing extractive distillation. The present invention further related to an extractive distillation employing an organic solvent having comparable or same Hansen dispersive force parameter (δd) of that of the key component of to be separated through extractive distillation. The present invention is useful for separating and isolating pure cyclohexane, pure methylcyclopentane and pure iso-heptane along with the pure n-hexane.
Claims10
A process for producing n-hexane, said process comprising:
- (a) subjecting a benzene saturated hydrocarbon stream to fractional separation at a temperature in range of 65° C. to 100° C. to split the benzene saturated hydrocarbon stream into a top stream and a bottom stream, wherein the bottom stream comprises a mixture of cyclohexane and iso-heptane and the top stream comprises a mixture of methylcyclopentane (MCP) and n-hexane;
- (b) subjecting the top stream of step (a) to extractive distillation to obtain n-hexane and methylcyclopentane by using an organic solvent;
- and
- (c) separating n-hexane.
Dependencies are inferred from the claim text.