国家/地区 中国（3）
IPC部 B（3）
IPC大类 B01（3）
IPC小类 B01D（3）
IPC
发明人 ZHANG C（3）
公开年 2021（3）
申请年 2020（3）
专利权人

Preparing environmentally friendly air filtering non-woven fabric comprises e.g. mixing polypropylene, electret masterbatch and polymer electret, and subjecting melt blown cloth to constant temperature infrared radiation heat treatment.

ZHANG C

Preparing precious metal/graphene-supported manganese-zinc-based low-light photocatalyst comprises dissolving noble metal chlorides e.g. platinum or palladium in water, allowing sol to form viscous gel state under heating conditions.

ZHANG C, RAN W, LI Z

Preparing low-valent vanadium tail gas from ammonium metavanadate comprises e.g. heating and dissolving crude ammonium metavanadate in water, adding sodium hydroxide, generating ammonia gas, collecting, and adding aqueous ammonia.

ZHANG C