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Method of producing...
Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) [Förfarande för framställning av blekt termomekanisk massa (TMP) eller blekt kemitermomekanisk massa (CTMP)]
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- Engstrand, Per, 1955- (författare)
- Mittuniversitetet,Institutionen för naturvetenskap, teknik och matematik (-2012),FSCN - High Yield Pulping Research Profile
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- Sandberg, Christer, 1961- (författare)
- Mittuniversitetet,Institutionen för naturvetenskap, teknik och matematik (-2012),FSCN - High Yield Pulping Research Profile
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- Jonsson, Jonas, 1974- (författare)
- Holmen Paper AB
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- Starck, Göran, 1953- (författare)
- Holmen Paper aB
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- Wahlgren, Mikael, 1961- (författare)
- Holmen Paper AB
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Wancke-Ståhl, Charlotte, 1970- (författare)
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(creator_code:org_t)
- 2003
- Engelska.
- Relaterad länk:
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https://www.google.c...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- There is a need for a cheaper method of producing bleached TMP and CTMP without impairing the properties of the pulp. This is made possible by the present invention, which relates to a method of producing said pulps in which finely divided lignocellulosic material is defibrated after pretreatment and the resultant pulp is bleached in the form of a suspension with bleaching agent that increases the anionic charge of the pulp fibres, whereafter the pulp suspension is cleaned and then possibly further treated, for instance bleached, characterised in that the defibration is effected with the aid of a) a refiner that has counter-rotating refining discs while using an extra high temperature (HTDD), or b) a refiner that has a single rotating refining disc(s) having a single refining zone or two parallel refining zones, while using an extra high temperature and while rotating the disc(s) at an extra high speed (RTS), and in that the cleaning treatment comprises first screeming the pulp suspension and them hydrocyclone cleaning said suspension, wherewith the reject obtained with each cleaning process is treated individually and the treated reject is returned to the advancing pulp suspension.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Nyckelord
- mechanical pulp
- chemimechanical pulp
- fractionation
- energy
- bleachingnical pulp
- chemimechanical pulp
- fractionation
- energy
- bleaching
Publikations- och innehållstyp
- pop (ämneskategori)
- pat (ämneskategori)