The invention relates to a
system and a method for recycling refined methyl
cyclopentane and application of the
system and the method. The
system comprises a
dehydrogenation unit, a purification unit,a
solvent recycling unit as well as a heat exchange unit, wherein the
dehydrogenation unit, the purification unit and the
solvent recycling unit are sequentially connected; the
dehydrogenation unit is a first extraction
distillation column; the purification unit is a second extraction rectification unit; the heat exchange unit comprises a first
heat exchanger, a second
heat exchanger and a thirdheat exchanger which are independent from one another; a
raw material input pipeline penetrates through the first
heat exchanger and then is connected with a
raw material inlet in the first extractiondistillation column; a first pipeline is arranged at the bottom of the first extraction
distillation column, and so on in a similar manner. An extraction agent used in the method is a mixed
solvent which is composed of one or a combination of at least two of
sulfolane,
ethylene glycol, glycerin, NMF (N-Formylmorpholine), NMP (N-Methyl Pyrrolidone) and DMF (
Dimethyl Formamide), and a deep-eutecticsolvent in a compounded manner. By adopting the system and the method, a methyl
cyclopentane product of which the purity is greater than 99.95wt% can be purified at one time, and the recycling rate of methyl
cyclopentane is greater than 99%.