| abstract |
It is an object of the present invention to provide a novel solid material having high functionality, particularly a solid material that can be used as an adsorbent for rare earth elements. A solid composition containing, as a base, a polymer having a structure represented by the following formula (A) in the side chain and further containing a specific compound having a functional group such as a phosphate group is a rare earth element. It becomes a solid material with high functionality such as an adsorbent. (In formula (A), each R 1 independently represents a hydrogen atom or a methyl group, each R 2 independently represents a hydrocarbon group having 2 to 30 carbon atoms, and n represents an integer of 2 to 100,000. .) [Selection] Figure 1 |