WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2006091140) METHOD FOR TREATMENT OF BLEACHED CHEMICAL PULP
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2006/091140    International Application No.:    PCT/SE2006/000112
Publication Date: 31.08.2006 International Filing Date: 26.01.2006
Chapter 2 Demand Filed:    08.09.2006    
IPC:
D21C 9/10 (2006.01), D21C 9/147 (2006.01)
Applicants: GL&V MANAGEMENT HUNGARY KFT [LU/LU]; Luxembourg Branch, 1, rue des Glacis, L-1628 Luxembourg (LU) (For All Designated States Except US).
LINDSTRÖM, Mikael [SE/SE]; (SE) (For US Only).
RAGNAR, Martin [SE/SE]; (SE) (For US Only).
STRAND, Helena [SE/SE]; (SE) (For US Only)
Inventors: LINDSTRÖM, Mikael; (SE).
RAGNAR, Martin; (SE).
STRAND, Helena; (SE)
Agent: HANO, Christian; V. Füner Ebbinghaus Finck Hano, Mariahilfplatz 3, 81541 Munich (DE)
Priority Data:
0500434-6 24.02.2005 SE
Title (EN) METHOD FOR TREATMENT OF BLEACHED CHEMICAL PULP
(FR) PROCEDE DE TRAITEMENT DE PATE CHIMIQUE BLANCHIE
Abstract: front page image
(EN)The invention concerns a treatment step for what is known as fully bleached cellulose pulp, which maintains a brightness that exceeds ISO 88. With the aim of reducing brightness reversion and also with the aim to a certain degree of achieving an increase in brightness, the fully bleached pulp is treated in a mild alkaline oxygen gas step. The tendency for brightness reversion expressed in PC number can be reduced by as much as 25-40%.
(FR)La présente invention se rapporte à un procédé de traitement de ce que l'on connaît sous le nom de pâte à papier hautement blanchie, qui maintient un degré de blancheur ISO supérieur à 88 %. Afin de réduire la perte de blancheur voire également d'obtenir une augmentation de la blancheur, l'on traite la pâte hautement blanchie à l'aide d'un gaz oxygène alcalin doux. La réduction de la tendance à la perte de blancheur exprimée en indice de jaunissement peut même atteindre 25-40 %.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: Swedish (SV)