ULTRASONIC TREATMENT WHEAT STRAW IN THE ENVIRONMENT 1-BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE
Abstract
The development of environmentally safe technology for processing lignocellulosic raw materials with the separation of polysaccharide and lignin fractions for subsequent use is an actual problem, a solution of which is possible when using ionic liquids as a solvent. To intensify the processing process, the possibility of using ultrasonic irradiation in the environment of 1-butyl-3-methylimidazolium chloride was studied. The results of the research of the influence of ultrasound power, temperature and processing time on the yield of fractions and the degree of purification of cellulose from impurities of hemicellulose and lignin are presented. It has been established that the use of ultrasound with a power of 10-50 W at processing of wheat straw in the environment of 1-butyl-3-methylimidazolium chloride promotes an increase in the degree of purification of cellulose from impurities, primarily hemicellulose, and a decrease in treatment time. The maximum degree of purification of cellulose was 68.1% and was received by irradiating with ultrasound 50 W at 140 °C within 15 min. It is shown that ultrasonic treatment of wheat straw in the environment of 1-butyl-3-methylimidazolium chloride provides an increase in the total yield of sugars of fermentolysis of polysaccharides of wheat straw by 4-5 times. The total yield of sugars of fermentolysis of the fractions of polysaccharides isolated in the experimental conditions was 83% of the theoretically possible.Downloads
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