Method for refining organic compound

An organic compound refinement method for refining a specific organic compound which is a target compound from at least two types of organic compounds, the method comprising

• separating the target compound from an organic compound other than the target compound while the at least two types of organic compounds are irradiated with light at an infrared absorption wavelength of a specific functional group that is not contained in the target compound but is contained in the organic compound other than the target compound, or
• separating the target compound from an organic compound other than the target compound while the at least two types of organic compounds are irradiated with light at an infrared absorption wavelength of a specific functional group that is contained in the target compound but is not contained in the organic compound other than the target compound,
• wherein, during the irradiation with the light at the infrared absorption wavelength of the specific functional group, a planar heater is used as an infrared heater that emits the light at the infrared absorption wavelength of the specific functional group.