Patent SG-11201804988P-A (SG)
Title: Boron removal and measurement in aqueous solutions
Inventor: CHEN FUMING
IPC: G01N27/26
Filed: 2016-12-13
Abstract: WO 17 / 105 3 48 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2017/105348 Al 22 June 2017 (22.06.2017) WIPO I PCT IIIIIIIIIIII10111011111111111010111110111010111111011011111111110111111111110111111 (51) International Patent Classification: CO2F 1/28 (2006.01) BOlD 15/36 (2006.01) CO1B 32/194 (2017.01) G01N 27/26 (2006.01) BO1J 20/20 (2006.01) CO1B 32/36 (2017.01) (21) International Application Number: PCT/SG2016/050601 (22) International Filing Date: 13 December 2016 (13.12.2016) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 10201510400S 17 December 2015 (17.12.2015) SG 10201510403T 17 December 2015 (17.12.2015) SG (71) Applicant: SINGAPORE UNIVERSITY OF TECHNO- LOGY AND DESIGN [SG/SG]; 8 Somapah Road, Singa- pore 487372 (SG). (72) Inventors: CHEN, Fuming; c/o Singapore University Of Technology And Design, 8 Somapah Road, Singapore 487372 (SG). YANG, Hui Ying; c/o Singapore University Of Technology And Design, 8 Somapah Road, Singapore 487372 (SG). (74) Agent: VIERING, JENTSCHURA & PARTNER LLP; P.O. Box 1088, Rochor Post Office, Rochor Road, Singa- pore 911833 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) (54) Title: BORON REMOVAL AND MEASUREMENT IN AQUEOUS SOLUTIONS FIGURE 7 (57) : In one embodiment, the invention relates to a carbon-based boron removal medium with hydroxyl groups and amine group, and in particular, to a method for forming the carbon-based boron removal medium. In a specific embodiment, nitro - gen-doped (\"N-doped\") graphene oxide is synthesized by a simple two-step process: (1) oxidation of graphite to graphene oxide, and (2) nitrogen-doping (\"N-doping\") the graphene oxide to form the amine group. The resultant N-doped graphene oxide can effi- ciently remove boron from aqueous solutions. In another embodiment, a method of sensing or detecting the presence of boron in an aqueous solution by using a boron sensing medium comprises at least two hydroxyl groups and at least one pyridinic nitrogen or pyrrolic nitrogen or quaternary nitrogen (i.e. pyridoxine, in particular vitamin B6). The boron ions in the solution would form a highly ionized complex, which can cause significant increase in electrical conductivity of the solution, which can then be used to measure the concentration of boron in said solution.