国家/地区 中国（8）
IPC部 B（8）
IPC大类 B01（8） C02（2）
IPC小类 B01D（8）
IPC B01D067/00（4） B01D069/12（3） B01D071/02（3）
B01D069/02（2） B01D069/10（2） C02F103/08（2）
发明人 WANG D（8）
公开年 2023（8）
申请年 2022（7） 
专利权人 CHONGQING GR.（4）

Producing urea for vehicles involves passing ammonia and carbon dioxide into synthesis tower, adding graphene-supported nitrogen atom catalyst, controlling temperature and pressure, reacting, depressurizing, cooling, separating gas and liquid, concentrating liquid, spray drying and granulating.

DU F, WANG Q, MO Z, WANG D, LUO X, FU L

Composite film for graphene, has gap for connecting upper surface and lower surface of graphene layer is set in graphene layer, through hole is set on supporting layer, and through holes on two sides are staggered.

JU Y, YI J, WANG D, WANG W

Preparing highly stable ceramic-based subnanoporous graphene composite film useful for e.g. removing boron in water during pervaporation process, comprises e.g. adding graphite oxide powder into water, configuring crosslinking agent solution, performing filtration method, and connecting support.

WANG D, YANG F, SUN C, ZHENG Q, DONG Y

Graphene filter film comprises first non-woven fabric layer, graphene layer and second non-woven fabric layer arranged in sequentially, where each layer is embedded with each other at connection position.

JU Y, YI J, WANG W, WANG D

Graphene filter plate, has substrate formed with filter hole, where graphene filter unit covers filter hole, and filtering unit is provided with filtering part and connecting part, filtering part located at inner side of connecting part.

YU F, YI J, JU Y, WANG D, WANG W

Graphene evaporation structure, has water absorbing fiber layer whose lower edge extends to lower edge of side surface of insulating plate, where density of insulating plate is less than density of water.

DONG L, YI J, WANG W, WANG D

Fruit and vegetable storage and transportation fresh-keeping system comprises outer circulation device and storage and transport environment space connected by quick joint, and outer circulating device is box body structure or pipe body structure with gas passage inside.

LIAN H, WEI W, YANG X, WANG D, JIA L

Oxidation graphene reverse osmosis membrane comprises sub-nano carbon tube, oxidation graphene layer, and phospholipid double-molecular layer.

WANG L, WANG D, LI Z