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1. (WO2018044508) GYPSUM ADDITIVE TO CONTROL MERCURY
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Pub. No.: WO/2018/044508 International Application No.: PCT/US2017/045689
Publication Date: 08.03.2018 International Filing Date: 07.08.2017
IPC:
C04B 11/00 (2006.01)
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
11
Calcium sulfate cements
Applicants:
ECOLAB USA INC. [US/US]; 1 Ecolab Place St. Paul, MN 55102, US
Inventors:
KEISER, Bruce, A.; US
CARLSON, Wayne, M.; US
DENNY, Nicholas, R.; US
YUAN, Jianwei; US
CHEN, Tommy, Hung-Ting; US
Agent:
BABYCH, Eric, D.; US
Priority Data:
62/382,66001.09.2016US
Title (EN) GYPSUM ADDITIVE TO CONTROL MERCURY
(FR) ADDITIF DE GYPSE POUR RÉGULER LE MERCURE
Abstract:
(EN) Additives including sulfur-containing compounds are used in methods of treating synthetic gypsum. The additives can thermally stabilize heavy metals, such as mercury. This thermal stabilization reduces mercury release from the synthetic gypsum. Illustrative, non-limiting examples of sulfur- containing compounds include inorganic sulfides, organic sulfides, organic compounds containing nitrogen and sulfur, organic compounds containing oxygen and sulfur, and polymers containing sulfur.
(FR) La présente invention concerne des additifs comprenant des composés contenant du soufre qui sont utilisés dans des procédés de traitement de gypse synthétique. Les additifs peuvent stabiliser thermiquement des métaux lourds, tels que le mercure. Cette stabilisation thermique réduit la libération du mercure présent dans le gypse synthétique. Des exemples illustratifs, non limitatifs, de composés contenant du soufre comprennent des sulfures inorganiques, des sulfures organiques, des composés organiques contenant de l'azote et du soufre, des composés organiques contenant de l'oxygène et du soufre, et des polymères contenant du soufre.
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 (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
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 (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)