Zobrazeno 1 - 10 of 202 pro vyhledávání: '"Olof Samuelson"'
2
Influence of Manganese and Magnesium on Oxygen Bleaching in Carbonate Media after a Nitrogen Dioxide Pretreatment
Autor: Olof Samuelson, Urban Öjteg
Publikováno v: hfsg. 50:379-385
Kraft pulps from softwood subjected to pretreatment with 2% NO 2 which removed magnesium and catalytically active transition metal compounds were delignified by more than 80% after oxygen bleaching with low charges of sodium carbonate. With 12 gmol N
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::681c5df266c354d671ce37a40be780fb
https://doi.org/10.1515/hfsg.1996.50.4.379
Zobrazit plný text záznamu
3
Behavior Of Calcium, Magnesium and Manganese Compounds During Oxygen Bleaching of Kraft Pulps
Autor: Urban Öjteg, Olof Samuelson
Publikováno v: Journal of Wood Chemistry and Technology. 15:303-328
During oxygen bleaching of kraft pulps manganese compounds can, depending on their amounts, the charges of sodium hydroxide and of magnesium protector, and on the presence of trace amounts of catalytically active transition metals retard or promote t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::693cb76842409cd8a6bcbe2339975fb6
https://doi.org/10.1080/02773819508009513
Zobrazit plný text záznamu
5
Dissolution of Lignin in Kraft Pulp by Oxygen Bleaching
Autor: Olof Samuelson, Per Larsson
Publikováno v: Journal of Wood Chemistry and Technology. 13:237-259
Gel permeation chromatography of spent liquors from oxygen bleaching showed that cleavage of covalent linkages in the fiber was a prerequisite for the dissolution of the lignin. The reactions continued in the liquor phase. The cleavage was related to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::328752c964ae18ef0369c56f2b47497d
https://doi.org/10.1080/02773819308020516
Zobrazit plný text záznamu
8
Dissolution of Lignin from Kraft Pulp after Treatment with Nitrogen Oxides
Autor: Olof Samuelson, Per Larsson
Publikováno v: Journal of Wood Chemistry and Technology. 10:311-330
Laboratory experiments show that pretreatment with NO2 including heating and ripening at 5% consistency and 90°C for 3 hours in the presence of NO3- and H+ led to a dissolution of approximately 50–60% of the lignin in unbleached kraft pulp. Only 5
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f721f446ab541dac8e0d93ff3b8ac8bd
https://doi.org/10.1080/02773819008050242
Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání

Omezení vyhledávání
Plný text Recenzováno Digitální knihovna AV ČR
Zdroje