DK-CD bead adsorbent is a smooth spherical adsorbent, which can better adsorb polar organic compounds, such as hydrocarbon oxides (alcohol, aldehyde, ether, peroxide, ethylene glycol); Mercaptan; Nitrogen compounds (ammonia, amine, nitrile). The adsorbent is used to remove impurities such as methanol and dimethyl ether in propylene refining of polypropylene unit.