公开(公告)号：US20210229033A1

公开(公告)日：2021-07-29

申请号：US16972020

申请日：2018-07-04

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Ji Guang Zhang ,  Jian Zou ,  Hongyu Chen ,  Shaoguang Feng ,  Wenbin Yao ,  Haiying Li ,  Xuemei Zhai

IPC: B01D53/72 ,  C09D179/02 ,  B01D53/02 ,  B01J20/28

Abstract: Polyethylenimine coated polymeric beads comprising a polymer that comprises, based on the weight of the polymer, from 25% to 75% by weight of structural units of an acetoacetoxy or acetoacetamide functional monomer, and from 25% to 75% by weight of structural units of a polyvinyl monomer; the polyethylenimine having a number average molecular weight of 300 g/mol or more; the polyethylenimine coated polymeric beads having a specific surface area in the range of from 20 to 400 m2/g; a process of preparing the polyethylenimine coated polymeric beads; a gas filter device comprising the polyethylenimine coated polymeric beads as a filter medium; and a method of removing aldehydes from air containing aldehydes, comprising contacting the air with the polyethylenimine coated polymeric beads.