国家/地区 中国（3）
IPC部 B（3） C（3） D（3）
IPC大类 C22（3）
IPC小类 D01F（3） C21D（2） C22C（2）
IPC D01F001/10（3）
发明人
公开年 2022（2）
申请年 2021（2） 
专利权人

Preparing amino-rich polyacrylonitrile-based nanocomposite fiber film used for removing and recycling gold, involves mixing N,N dimethylformamide dispersion of graphene oxide and the N,N-dimethylformamide solution of hyperbranched polyethyleneimine and performing amidation reaction.

ZHONG X, MENG W, YANG H, SHI X, LI X, LI T, MA Y

High strength conversion flange comprises steel material having carbon, silicon, manganese, chromium, nickel, molybdenum, gallalium, Rhenium, zirconium, lutetium, and strontium.

MENG K

Preparation of copper based iron based composite electrical contact material includes preparing graphene fiber containing ferric oxide powder, modifying graphene fiber containing ferric oxide powder and pretreating base material.

ZHENG Y