Deinking agent and synthesis method thereof

The invention relates to a deinking agent and a synthesis method thereof. The deinking agent contains gemini amphoteric polyether, wherein the gemini type amphoteric polyether contains unsaturated gemini type quaternary ammonium salt, a polyether segment and fatty acid. It is ensured that the deinking agent has good permeability by changing different combinations of EO and PO in the gemini amphoteric polyether and the proportion of the unsaturated fatty acid, the unsaturated polyether and the unsaturated gemini type quaternary ammonium salt, bubbles are easy to control in the flotation process, the service life of the bubbles is moderate, the capture ability of ink is strong, oil-resistant ink deposits again, the dirt count is reduced, and the full pulp whiteness of waste paper is improved. 本发明涉及种脱墨剂及其合成方法，该脱墨剂中包含双子型两性聚醚，双子型两性聚醚中含有不饱和双子型季铵盐、聚醚链段和脂肪酸。通过双子型两性聚醚中EO、PO的不同组合以及不饱和脂肪酸、不饱和聚醚和不饱和双子型季铵盐比例的变化，保证该脱墨剂具有良好的渗透性能，在浮选过程中，泡沫大小容易控制，泡沫寿命适中，油墨捕集能力强，抗油墨再沉积，降低尘埃度，提高废纸成浆白度。