Monomer alkane refrigerant preparation device and method

The invention provides a monomer alkane refrigerant preparation device. The technical scheme thereof is that the device mainly comprises an n-butane removal tower (1), a cyclopentane removal tower (2), an n-pentane removal tower (3), a propane removal tower (4), an iso-butane removal tower (5), an ortho-iso-pentane knockout tower (6), a propane-butane removal tower (7), a hydrogenation reactor (8), a material buffer tank (9), a No. 120 tower (10), an isohexane tower (11), a first extraction rectification column (12), a first solvent recovery tower (13), a second extraction rectification column (14), a second solvent recovery tower (15) and a No. 6 tower (16). The monomer alkane refrigerant preparation device has the beneficial effects that the whole device is low in energy consumption, less in three-waste discharge and flexible in product adaptation, so that equipment investment and operation risk are greatly reduced, and the convert ratio can reach 99.99 percent, and obtained propane, iso-butane and pentane products are high in purity and are ideal environment-friendly hydrocarbon refrigerants at present.