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1. (WO2018046286) ADSORBENT COMPRISING LAYERED DOUBLE HYDROXIDE AND ACTIVATED CARBON
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.:    WO/2018/046286    International Application No.:    PCT/EP2017/071010
Publication Date: 15.03.2018 International Filing Date: 21.08.2017
IPC:
B01J 20/06 (2006.01), B01J 20/08 (2006.01), B01J 20/04 (2006.01), B01J 20/20 (2006.01), B01J 20/28 (2006.01), B01J 20/32 (2006.01), B01J 20/30 (2006.01)
Applicants: UNILEVER N.V. [NL/NL]; Weena 455 3013 AL Rotterdam (NL) (AL, AM, AO, AT, AZ, BA, BE, BF, BG, BJ, BR, BY, CF, CG, CH, CI, CL, CM, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, ES, FI, FR, GA, GE, GN, GQ, GR, GT, GW, HN, HR, HU, ID, IR, IS, IT, JP, KG, KH, KM, KP, KR, KZ, LA, LR, LT, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MX, MZ, NE, NI, NL, NO, PA, PE, PH, PL, PT, RO, RS, RU, SE, SI, SK, SM, SN, ST, SV, SY, TD, TG, TH, TJ, TM, TN, TR, UA, UZ, VN only).
UNILEVER PLC [GB/GB]; a company registered in England and Wales under company no. 41424 of Unilever House 100 Victoria Embankment London Greater London EC4Y 0DY (GB) (AE, AG, AU, BB, BH, BN, BW, BZ, CA, CY, EG, GB, GD, GH, GM, IE, IL, IN, JO, KE, KN, KW, LC, LK, LS, MT, MW, MY, NA, NG, NZ, OM, PG, QA, RW, SA, SC, SD, SG, SL, SZ, TT, TZ, UG, VC, ZA, ZM, ZW only).
CONOPCO, INC., D/B/A UNILEVER [US/US]; 800 Sylvan Avenue AG West, S. Wing Englewood Cliffs, New Jersey 07632 (US) (US only)
Inventors: PRAMANIK, Amitava; (IN).
DAS, Somnath; (IN).
SARKAR, Priyanka; (IN).
APPAVOO, Shanthi; (IN)
Agent: WARNER, Guy, Jonathan; (NL)
Priority Data:
16187431.8 06.09.2016 EP
Title (EN) ADSORBENT COMPRISING LAYERED DOUBLE HYDROXIDE AND ACTIVATED CARBON
(FR) ADSORBANT COMPRENANT UN HYDROXYDE DOUBLE LAMELLAIRE ET DU CHARBON ACTIF
Abstract: front page image
(EN)The present invention relates to a material that absorbs volatile compounds, in particular sulphurous compounds. It is found that an absorbent of high surface area suitable for highly volatile compounds can be obtained by growing nanoparticles of a layered double hydroxide (LDH) on the surface of powder activated carbon (PAC). Disclosed is a composite adsorbent comprising nanoparticles of a layered double hydroxide (LDH) and a powder activated carbon (PAC) of the general formula [M2+1-xM3+x (OH)2]q+(Xn-)q/n.yH2O, in which, M2+ = Ca2+, Mg2+, Mn2+, Fe2+, CO2+, Ni2+, Cu2+ or Zn2+; M3+ = Al3+ or Fe3+; x = [M3+]/ [M3+ + M2+]; q = x n = 1 to 4; and, y = number of water molecules present on the LDH; X = anions selected from halides, sulphates, nitrates, carbonates or anionic moiety from organic sources wherein said composite is obtainable by a hydrothermal process comprising, in sequence, the steps of: (a) contacting, and mixing, powder activated carbon with a water soluble salt of M2+ and a water soluble salt of M3+; (b) adding an alkali to the dispersion of step (a); (c) aging the dispersion of step (b) by heating it to 80 to 100 °C; (d) separating, by any means, the aqueous phase of the dispersion from the dispersed phase; and (e) washing said dispersed phase with water to remove excess alkali, to get the composite adsorbent, wherein amount of nanoparticles of said layered double hydroxide (LDH) is 10 to 30% by weight and wherein particle size of said powder activated carbon is 50 μm to 500 μm.
(FR)La présente invention concerne un matériau qui absorbe des composés volatils, en particulier des composés soufrés. Il s'avère qu'un absorbant de surface de contact élevée approprié pour des composés hautement volatils peut être obtenu par croissance de nanoparticules d'un hydroxyde double lamellaire (LDH) sur la surface de charbon actif en poudre (PAC). L'invention concerne un adsorbant composite comprenant des nanoparticules d'un hydroxyde double lamellaire (LDH) et un charbon actif en poudre (PAC) de formule générale [M2+ i-xM3+ x(OH)2]q + (xn-)q/n.yH2O, dans laquelle M2+ = Ca2 +, Mg2+, Mn2+, Fe2 +, CO2+, Ni2+, Cu2+ ou Zn2+; M 3+ = Al3+ ou Fe3+; x = [M3+]/ [M 3++ M2+]; q = x n = 1 à 4; et, y = nombre de molécules d'eau présentes sur le LDH; x = des anions choisis parmi les halogénures, les sulfates, les nitrates, les carbonates ou une fraction anionique à partir de sources organiques. Ce composite peut être obtenu par un procédé hydrothermique comprenant, en séquence, les étapes consistant à : (a) mettre en contact et mélanger, du charbon actif en poudre avec un sel soluble dans l'eau de M2+ et d'un sel soluble dans l'eau de M 3+; (b) ajouter un alcali à la dispersion de l'étape (a); (c) vieillir la dispersion de l'étape (b) en le chauffant de 80 à 100 °C; (d) séparer, par tout moyen, la phase aqueuse de la dispersion à partir de la phase dispersée; et (e) laver ladite phase dispersée avec de l'eau pour éliminer l'excès d'alcali, afin d'obtenir l'adsorbant composite, la quantité de nanoparticules dudit hydroxyde double lamellaire (LDH) est de 10 à 30 % en poids et la taille des particules dudit charbon actif en poudre est de 50 μm à 500 μm.
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.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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 (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)