Japan's Shokubai Chemical Industry Co., Ltd. developed a deinking agent for the recycling of waste paper, which has good foaming performance and biodegradability, resulting in a higher whiteness of the circulating paste and less residual ink. The deinking agent contains a secondary alcohol alkoxide derived from a C8-30 alkene (e.g., 1-dodecene) (e.g., dodecanol ethoxylate, dodecanol triethoxylate) and The polyalkylene glycol (e.g., ethylene glycol, triethylene glycol) reaction is preferably further reacted with a C2-8 alkylene oxide (e.g., ethylene oxide).