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Machine translation
1. (WO1998029597) TREATMENT OF PULP WITH A CHELATING AGENT WITHOUT USING A BLEACHING TOWER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1998/029597    International Application No.:    PCT/SE1997/001853
Publication Date: 09.07.1998 International Filing Date: 06.11.1997
Chapter 2 Demand Filed:    16.06.1998    
IPC:
D21C 9/02 (2006.01), D21C 9/10 (2006.01)
Applicants: SUNDS DEFIBRATOR INDUSTRIES AB [SE/SE]; S-851 94 Sundsvall (SE) (For All Designated States Except US).
GERMGÅRD, Ulf [SE/SE]; (SE) (For US Only).
LINDQUIST, Jonas [SE/SE]; (SE) (For US Only)
Inventors: GERMGÅRD, Ulf; (SE).
LINDQUIST, Jonas; (SE)
Agent: SUNDQVIST, Hans; Sunds Defibrator Industries AB, Strandbergsgatan 61, S-112 51 Stockholm (SE)
Priority Data:
9700030-1 03.01.1997 SE
Title (EN) TREATMENT OF PULP WITH A CHELATING AGENT WITHOUT USING A BLEACHING TOWER
(FR) TRAITEMENT DE PATE AVEC UN CHELATEUR SANS UTILISER DE TOUR DE BLANCHIMENT
Abstract: front page image
(EN)A method at chlorine-free bleaching of pulp where metals are removed by means of chelating agent. The chelating agent is mixed with the pulp in at least one effective mixing step without intermediate washing, whereafter the pulp without an intermediate tower passes directly to a pulp washer. The total retention time shall be at maximum 15 minutes, calculated after the chelating agent addition.
(FR)L'invention concerne un procédé de blanchiment de pâte sans chlore, selon lequel on enlève les métaux au moyen d'un chélateur. Le chélateur est mélangé à la pâte lors d'au moins une opération efficace sans lavage intermédiaire. Ensuite, la pâte est directement amenée à un dispositif de lavage sans passer par une tour intermédiaire. Le temps total de rétention doit être de 15 minutes maximum, à compter de l'adjonction du chélateur.
Designated States: AU, BR, CA, CN, JP, NO, NZ, US.
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: English (EN)
Filing Language: English (EN)