(12) International Application Status Report

Received at International Bureau: 11 August 2018 (11.08.2018)

Information valid as of: 15 January 2019 (15.01.2019)

Report generated on: 19 July 2019 (19.07.2019)

(10) Publication number: (43) Publication date: (26) Publication language:
WO 2019/02812707 February 2019 (07.02.2019) English (EN)

(21) Application number: (22) Filing date: (25) Filing language:
PCT/US2018/04478101 August 2018 (01.08.2018) English (EN)

(31) Priority number(s): (32) Priority date(s): (33) Priority status:
62/540,028 (US)01 August 2017 (01.08.2017) Priority document received (in compliance with PCT Rule 17.1)

(51) International Patent Classification:
B01J 20/06 (2006.01); B01J 20/02 (2006.01); B01J 20/28 (2006.01); B01J 35/00 (2006.01); B01D 53/02 (2006.01)

(71) Applicant(s):
RESEARCH TRIANGLE INSTITUTE [US/US]; 3040 Cornwallis Road Research Triangle Park, NC 27709 (US) (for all designated states)

(72) Inventor(s):
SHEN, Jian-Ping; c/o Research Triangle Institute 3040 Cornwallis Road Research Triangle Park, NC 27709 (US)
NORMAN, Jason, S.; c/o Research Triangle Institute 3040 Cornwallis Road Research Triangle Park, NC 27709 (US)
TURK, Brian, S.; c/o Research Triangle Institute 3040 Cornwallis Road Research Triangle Park, NC 27709 (US)
GUPTA, Raghubir; c/o Research Triangle Institute 3040 Cornwallis Road Research Triangle Park, NC 27709 (US)

(74) Agent(s):
LETTS, Nathan, P.; Olive Law Group, PLLC 125 Edinburgh South Dr., Suite 220 Cary, North Carolina 27511 (US)

(54) Title (EN): ZINC OXIDE-BASED SORBENTS USING ALKALI METAL HYDROXIDES AND PROCESSES FOR PREPARING AND USING SAME
(54) Title (FR): SORBANTS À BASE D'OXYDE DE ZINC UTILISANT DES HYDROXYDES DE MÉTAUX ALCALINS ET LEURS PROCÉDÉS DE PRÉPARATION ET D'UTILISATION

(57) Abstract:
(EN): Zinc oxide-based sorbents, and processes for preparing and using them are provided, wherein the sorbents are preferably used to remove one or more reduced sulfur species from gas streams. The sorbents contain an active zinc component, optionally in combination with one or more promoter components and/or one or more substantially inert components. The active zinc component is a two-phase material, consisting essentially of a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl2O4) phase. Each of the two phases is characterized by a relatively small crystallite size of typically less than about 50 nm (500 Angstroms). Preferably the sorbents are prepared by using an alkali metal base to convert a precursor mixture, containing a precipitated zinc oxide precursor and a precipitated aluminum oxide precursor, to the two-phase, active zinc oxide containing component, with the resulting sorbent having a sodium level within a desired range.
(FR): L'invention concerne des sorbants à base d'oxyde de zinc, et leurs procédés de préparation et d'utilisation, où les sorbants sont de préférence utilisés pour éliminer une ou plusieurs espèces de soufre réduites contenues dans des flux gazeux. Les sorbants contiennent un composant de zinc actif, éventuellement en combinaison avec un ou plusieurs composants de promoteur et/ou un ou plusieurs composants sensiblement inertes. Le composant de zinc actif est un matériau à deux phases, essentiellement constitué d'une phase oxyde de zinc (ZnO) et d'une phase aluminate de zinc (ZnA12O4). Chacune des deux phases est caractérisée par une taille de cristallites relativement petite, généralement inférieure à environ 50 nm (500 Angströms). De préférence, les sorbants sont préparés à l'aide d'une base métal alcalin pour convertir un mélange précurseur, contenant un précurseur d'oxyde de zinc précipité et un précurseur d'oxyde d'aluminium précipité, en composant contenant de l'oxyde de zinc actif à deux phases, où le sorbant obtenu a une teneur en sodium dans une plage souhaitée.

International search report:
Received at International Bureau: 20 December 2018 (20.12.2018) [KR]

International Report on Patentability (IPRP) Chapter II of the PCT:
Not available

(81) Designated States:
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, JO, 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
European Patent Office (EPO) : 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
African Intellectual Property Organization (OAPI) : BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG
African Regional Intellectual Property Organization (ARIPO) : BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW
Eurasian Patent Organization (EAPO) : AM, AZ, BY, KG, KZ, RU, TJ, TM

Declarations:
Declaration made as applicant's entitlement, as at the international filing date, to apply for and be granted a patent (Rules 4.17(ii) and 51bis.1(a)(ii)), in a case where the declaration under Rule 4.17(iv) is not appropriate
Declaration of inventorship (Rules 4.17(iv) and 51bis.1(a)(iv)) for the purposes of the designation of the United States of America