Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2017037340) A METHOD FOR REMOVING HUMIC SUBSTANCES FROM AN AQUEOUS ALKALINE SOLUTION
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2017/037340 International Application No.: PCT/FI2016/050595
Publication Date: 09.03.2017 International Filing Date: 31.08.2016
IPC:
C02F 1/52 (2006.01) ,B01D 21/01 (2006.01) ,C02F 103/28 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
52
by flocculation or precipitation of suspended impurities
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
21
Separation of suspended solid particles from liquids by sedimentation
01
using flocculating agents
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
103
Nature of the water, waste water, sewage or sludge to be treated
26
from the processing of plants or parts thereof
28
from the paper or cellulose industry
Applicants:
KEMIRA OYJ [FI/FI]; Porkkalankatu 3 FI-00180 Helsinki, FI
Inventors:
AHLGREN, Jonni; FI
HALTTUNEN, Sakari; FI
RUOTSALAINEN, Jussi; FI
LUHTALA, Maria; FI
NIEMELÄ, Miia; FI
Agent:
BERGGREN OY; P.O. Box 99 20521 Turku, FI
Priority Data:
2015562802.09.2015FI
Title (EN) A METHOD FOR REMOVING HUMIC SUBSTANCES FROM AN AQUEOUS ALKALINE SOLUTION
(FR) PROCÉDÉ D'ÉLIMINATION DES SUBSTANCES HUMIQUES D'UNE SOLUTION ALCALINE AQUEUSE
Abstract:
(EN) A method for removing humic substances comprising lignin, other lignin type compounds and their disintegration products from an aqueous alkaline waste water from a bleaching of chemical pulp, which method comprises - obtaining an aqueous alkaline waste water comprising humic substances such as dissolved lignin, and - adding a high cationic starch having a charge density value of at least 1.8 meq/g dry matter of starch derivates determined at pH 7 - 7.5 to the alkaline waste water to precipitate humic substances.
(FR) Cette invention concerne un procédé d'élimination des substances humiques comprenant de la lignine, d'autres composés de type lignine et leurs produits de désintégration des eaux usées alcalines générées par le blanchiment de la pâte chimique, ledit procédé comprenant - l'obtention d'eaux usées alcalines comprenant des substances humiques telles que de la lignine dissoute, et - l'ajout d'un amidon fortement cationique ayant une valeur de densité de charge déterminée à pH 7-7,5 d'au moins 1,8 méq/g de matière sèche de dérivés d'amidon auxdites eaux usées alcalines pour précipiter les substances humiques.
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, 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, KN, KP, KR, 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)