Influence of Some Boron Compounds on Kraft Pulping of European Black Pine and European Aspen/Utjecaj nekih spojeva bora na sulfatni postupak proizvodnje pulpe od drva europskoga crnog bora i europske jasike

This study investigated the effects of E-48 borax pentahydrate (A), E-67 agro boron (B), and Ground Colemanite (C) on properties of kraft pulp-paper obtained from European black pine and European aspen. The highest screened pulp yield values were determined by adding 8 % B during cooking of both species. The best pulp strength increases were determined by adding 8 % B during cooking of European aspen. Likewise, compared to control samples, the stability of Xylose, Mannose and 4-0-MeGlcA units was increased in European black pine kraft pulp after adding 8 % B. Furthermore, in producing the European aspen pulp, adding of 8 % A during cooking positively affected the total amount of hemicelluloses. Key words: Boron, Kraft pulping, European black pine, European aspen, Paper strength, Hemicelluloses U radu su ispitivani ucinci E-48 boraks pentahidrata (A), E-67 agro bora (B) i kolemanita (C) na svojstva papira proizvedenoga od pulpe dobivene sulfatnim postupkom od drva europskoga crnog bora i europske jasike. Najveci prinos pulpe dobiven je dodavanjem 8 % agro bora tijekom kuhanja obiju vrsta drva. Najveca cvrstoca pulpe dobivena je dodavanjem 8 % agro bora tijekom kuhanja europske jasike. Jednako tako, stabilnost ksiloze, manoze i jedinica 4-0-MeGlcA u usporedbi s kontrolnim uzorcima povecana je u pulpi europskoga crnog bora nakon dodavanja 8 % agro bora. Takoder, dodavanje 8 % boraks pentahidrata tijekom kuhanja drva pri proizvodnji pulpe od drva europske jasike pozitivno je utjecalo na ukupnu kolicinu hemiceluloza. Kljucne rijeci: bor, sulfatni postupak proizvodnje pulpe, europski crni bor, europska jasika, cvrstoca papira, hemiceluloze