Method for absorbing and separating light hydrocarbon from isobutene device

The invention relates to a method for absorbing and separating light hydrocarbon from an isobutene device, which is mainly used for solving the problem of high energy consumption in the prior art. In order to solve the problem, the technical scheme adopted by the invention lies in that the method for absorbing and separating the light hydrocarbon from the isobutene device is adopted, technical means of performing absorption and repeated cooling, performing desorption and repeated heating, performing incomplete clear segmentation, optimizing heat exchange of materials, preventing using low-temperature cooling capacity and the like are adopted, so that the circulation volume of a solvent is reduced, the consumption of public works is reduced, the steam consumption is reduced to 0.280-0.296 ton per ton of products, the power consumption is reduced to 60-68 Killiwatt per ton of products, and the method can be used for absorbing and separating the light hydrocarbon from the isobutene device.