Nagorna Ju.M.

Influence of Bast Fibers Treatment Stages on Microcrystalline Cellulose Indices

The process of obtaining microcrystalline cellulose from non-wood plant bast fibers (flax, hemp, kenaf) with using preliminary acid hydrolysis, alkaline sulfite -alcohol method delignification and oxidation-organosolvent processing was investigated. It is established that the conduct preliminary acid hydrolysis in the first step of obtaining microcrystalline cellulose can significantly reduce the mineral content (at 62–75 %), partly yield of pulp (at 9–12 %) and residual lignin content (at 20–30 %) compared of feedstock.

Investigation of Various Stages Process for Producing Microcrystalline Pulp from Hemp for its Quality Indicators

A comparative analysis of the chemical composition of the hemp fibers and stalks with cotton and representatives of hardwood and softwood was performed. The possibility of obtaining microcrystalline cellulose from hemp fibers by alkaline sulfite-alcohol delignification with preliminary acid and alkaline hydrolysis was investigated. It was found that carrying out an acid and an alkali pre-hydrolysis reduces the mineral content and partly of residual lignin in the plant material.