ЭФФЕКТИВНОСТЬ ИСПОЛЬЗОВАНИЯ РАПСОВОЙ ЦЕЛЛЮЛОЗЫ

Анотація

Исследовано влияние пероксида водорода на волокнистые полуфабрикаты, полученные из соломы рапса нейтрально-сульфитным способом. Изучено влияние расхода пероксида водорода и степени делигнификации исходной целлюлозы на белизну и показатели качества белёной целлюлозы. Проанализированы химические и механические потери волокна в процессе пероксидной отбелки недеревесного сырья.

Исследовано использование отбеленной рапсовой целлюлозы в композиции с белёной сульфитной хвойной целлюлозой для получения офсетной и писчей бумаги. Показано, что увеличение доли рапсовой целлюлозы в бумаге повышает однородность, плотность, непрозрачность, что обеспечивает хорошие печатные свойства такой бумаге. Установлено оптимальные соотношения в композиции бумаг отбеленной рапсовой и сульфитной хвойной целлюлозы без снижения показателей качества. 


The purpose of the present study was to define the impact of hydrogen peroxide at bleaching ability of fibrous semi-products obtained from the rape straw by neutral-sulfite process and their practical application. Rape pulp bleaching was carried out in environmentally friendly way using hydrogen peroxide without any chlorine compounds. Before bleaching, the pulp was treated with chelates. The effect of hydrogen peroxide consumption rate and delignification degree of initial cellulose at brightness and quality indicators of bleached cellulose were studied. The effect of anthraquinone catalyst on bleachability of semi-products was shown. Chemical and mechanical fiber losses in the peroxide bleaching process of non-wood raw materials were analyzed. The reduction the residual lignin content in the bleached pulp was confirmed, that explained the process of partial delignification. The impact of large number of small fibers on the quality of bleaching process and pulp brightness was determined.
The ability of bleached and non-bleached pulp to fibrillate in the grinding process and their papermaking abilities was shown.
The application of 100 % bleached rape pulp and its combination with bleached sulfite softwood pulp for producing of offset and writing paper was investigated. Original ash content positively effected paper sizing indicator. It was shown that increased share of rape cellulose in the paper improved the uniformity, density, opacity, that provides good printing properties of such paper. The influence of rapeseed pulp on strength of offset and writing paper was investigated.  The optimal ratio of bleached rape and sulfite softwood pulp in the composite without the reduction of quality was obtained. Writing paper №2 or offset paper № 2 of B grade could be produced from 100 % rape cellulose, while at least 50 % bleached softwood pulp is required for manufacturing of A grade paper, which complies with the standard.
ЧЕРЁПКИНА Р. И., к.т.н., доц.


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