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Method for precipit...
Method for precipitating hemicellulose onto fibres for improved yield and beatability : Förfaringssätt för utfällning av hemicellulosa på fiber för förbättrat utbyte och malbarhet
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Snekkens, Vidar (författare)
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Olsson, Krister (författare)
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Gustafsson, Lennart (författare)
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- Mikael, Lindström (författare)
- KTH,Fiber- och polymerteknologi
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(creator_code:org_t)
- 1998
- Engelska.
- Relaterad länk:
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http://worldwide.esp...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- A method for continuous cooking of lignocellulosic fibre material, comprising the steps of sequentially (a) in a first stage, impregnating the fibre material in an impregnation liquid comprising alkali metal hydroxide, and thereafter withdrawing (14, 514) a spent impregnation liquid; (b) in a second stage, cooking the fibre material in a cooking liquor comprising alkali metal hydroxide; and (c) in a third stage, adding (A), to said fibre material, a liquid which is rich in hemicellulose, said liquid preferably comprising at least a part (14a, 514a) of said withdrawn spent impregnation liquid. In a fourth stage (d), the fibre material is cooked in a cooking liquor comprising the liquid added in the third stage, whereby the fibre material is subjected to a retention time of at least 1 hour in said fourth stage.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publikations- och innehållstyp
- pop (ämneskategori)
- pat (ämneskategori)