Patent ID: 11944940
Assignee: LG CHEM, LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 2:
3. A water-treatment membrane having a bromine element content of greater than 0 at % and less than or equal to 5 at % when measured using an electron spectroscopy for chemical analysis (ESCA) elemental analysis on a surface of the water-treatment membrane using X-ray photoelectron spectroscopy,
wherein:
the membrane has boron rejection of 93.7% to 96.9% and a salt rejection of 99.90% to 99.96%;
a chlorine element content is greater than 0 at % and less than or equal to 1 at %, and a ratio of the bromine element to the chlorine element (Br/Cl) is from 5:1 to 10:1.