Obtaining of straw pulp in isobutanol medium

Валерій Анатолійович Барбаш, Ольга Василівна Ященко


Background. Decreasing of wood consumption and hazardous wastes in environment due to ecologically safe methods of plant raw material delignification.

Objective. Identification of technological parameters influence on obtaining of organosolvent straw pulp and impact of catalysts (anthraquinone and hydrazine) on the delignification process, main quality indices of pulp, kinetic characteristics.

Methods. Pulping of organosolvent straw pulp with using of catalysts was performed in 0.25 dm3 steel autoclaves placed in glycerol bath heated at temperature 140–180 °C and 30–150 minutes duration.

Results. Obtained organosolvent straw pulp with anthraquinone and hydrazine catalysts are characterized by such physical and mechanical properties: breaking length – 7900–6900 m; burst index – 4.33–4.52 kN/g; folding strength – 128–600 double folds. It was established that using of hydrazine catalyst allows obtaining pulp with lesser lignin, ash and pentosans content then with anthraquinone. It was determined that delignification in isobutanol–KOH–water–catalyst system is described by second-order kinetic equation. Kinetic characteristics (reaction rate and energy of activation) of wheat straw delignification and characteristics of lignin removal from plant raw material were calculated.

Conclusions. Obtained organosolvent straw pulp is suitable for production of paper and cardboard products and after bleaching and alkali treatment – for further chemical treatment into different cellulose derivatives. 


Wheat straw; Cellulose; Isobutanol; Anthraquinone; Hydrazine; Kinetic characteristics; Selectivity indices

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D. Klemm et al., “Nanocelluloses: a new family of nature-based materials”, Angew. Chem. Int. Ed., vol. 50, рр. 5438–5466, 2011.

I. Siro, “Microfibrillated cellulose and new nanocomposite materials: a review”, Cellulose, no. 17, рр. 459–494, 2010.

Ministry of Agrarian Policy and Food of Ukraine [Online]. Avaliable:

V. Barbash et al., “Аmmonia-sulfite-ethanol pulp from wheat straw”, Cellulose Chem. Technol., no. 48 (3-4), pp. 345–353, 2014.

V. Udaltsov, “Delignification of wood in the potassium hydroxide-isobutanol-water system in the presence of hydrazine”, in Proceed. V All-Russian Conf. New Advances in Chemistry and Chemical Technology of Raw Materials, Bernaul, Russia, 2012, pp. 71–72 (in Russian).

S. Yakushko, “Organic fertilizers. Advantages and production methods”, Khimichna Promyslovist' Ukrayiny, no. 3 (86), pp. 38–43, 2008 (in Ukrainian).

K. Davlyashin, “Delignification of pine by potassium hydroxide in the isobutanol–water system”, Ph.D. dissertation, St. Petersburg Forest Tech. Academy, St. Petersburg, 2011.

V.A. Barbash and O.V. Yashchenko, “Straw cellulose in the isobutanol–hydrazine–KOH”, Technology Audit and Production Reserves, vol. 6, no. 1 (20), pp. 17–20, 2014.

O.L.M. Kamoga et al., “A review on pulp manufacture from non wood plant”, IJCEA, vol. 4, no. 3, pp. 144–148, 2013.

TAPPI Test Methods. Atlanta, Georgia: Tappi Press, 2004.

V. Barbash, “Substantiation of processes efficiency methodology assessment of plant material delignification”, Naukovi Visti NTUU KPI, no. 5, pp. 146–151, 2011 (in Ukrainian).

GOST Style Citations

  1. Nanocelluloses: a new family of nature-based materials / D. Klemm, F. Kramer, S. Moritz et al. // Angew. Chem. Int. Ed. – 2011. – 50. – P. 5438–5466.
  2. Siro I. Microfibrillated cellulose and new nanocomposite materials: a review // Cellulose. – 2010. – № 17. – P. 459–494.
  3. Міністерство аграрної політики та продовольства України [Електронний ресурс]. – Режим доступу: http://mi­nag­
  4. Barbash V., Trembus I., Shevchenko V. Аmmonia-sulfite-ethanol pulp from wheat straw // Cellulose Chem. Technol. – 2014. – № 48 (3-4). – P. 345–353.
  5. Удальцов В.А. Делигнификация древесины в системе гидроксида калия-изобутанол-вода в присутствии гидразина // Новые достижения в химии и химической технологии растительного сырья: Материалы V Всерос. конф, 24–26 апреля 2012 г., Бернаул. – Бернаул: Изд-во Алт. ун-та, 2012. – С. 71–72.
  6. Якушко С.І. Органо-мінеральні добрива. Переваги та способи виробництва // Хімічна промисловість України. – 2008. – № 3 (86). – С. 38–43.
  7. Давляшин К.С. Делигнификация древесины сосны гидроксидом калия в системе изобутанол–вода: Автореф. дис. ... канд. техн. наук: спец. 05.21.03 “Технология и оборудование химической переработки биомассы дерева; химия древесины”. – СПб, 2011. – 146 с.
  8. Barbash V.A., Yashchenko O.V. Straw cellulose in the isobutanol–hydrazine–KOH // Technology Audit and Production Reserves. – 2014. – 6, № 1 (20). – P. 17–20.
  9. Kamoga O.L.M., Byaruhanga J.K., Kirabira J.B. A review on pulp manufacture from non-wood plant materials // IJCEA. – 2013. – 4, № 3. – P. 144–148.
  10. TAPPI Test Methods. – Atlanta, Georgia: Tappi Press, 2004.
  11. Барбаш В.А. Обґрунтування методології оцінювання ефективності процесів делігніфікації рослинної сировини // Наукові вісті НТУУ “КПІ”. – 2011. – № 5. – С. 146–151.

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