▎ 摘　　要

NOVELTY - Graphene hybrid material obtained by gelling of reduced graphene oxide and alginate. USE - The graphene hybrid material is useful in removal process of polyolefin polymerization residual catalyst in model test, pilot test and industrial scale. ADVANTAGE - The graphene hybrid material has obvious effect on removing metal elements of residual catalysts in polyolefin polymers, and the process of removing catalysts is simple, and economical. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the graphene hybrid material, comprising mixing reduced graphene oxide with alginate and then gelling to obtain a graphene hybrid material; removing catalysts in polyolefin polymers, comprising mixing graphene hybrid materials with polyolefin polymers to remove catalysts; adsorption device comprising a graphene hybrid material, a container of the graphene hybrid material and a screen cloth positioned at the bottom of the device; and use of the adsorption device in the removal of catalysts in polyolefin polymers.