Optimization of yields of modified lignin sulfonate production by response surface method

محمدزاده, قاسم and بهبودی, گیتی and شایسته, کیوان Optimization of yields of modified lignin sulfonate production by response surface method. In: 1st International Conference and the 4th National Conference on Conservation of Natural Resources and Environment, August 2019, Ardabil, Iran.

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Abstract

Lignin is the second most abundant renewable natural polymer after cellulose. Due to its very complex structure, its use in the industries is very limited and is produced as a by-product in the paper industry, thus the large volume of lignin production has become an environmental problem. The use of lignin directly leads to the synthesis and production of low-value materials. Many studies have been done on the added value of using lignin by its chemical modification, especially on acetic anhydride by esterification. There is a large amount of lignin sulfate in the wastewater of the Mazandaran Wood and Paper Factory. Ethanol solvent was used as a suitable solvent during the extraction process to increase the yield of modified lignin sulfonate. In this study, optimization of modified lignin sulfonate production efficiency was performed using response surface methodology (RSM). Based on the results, the amount of modified lignin sulfonate increased with increasing ethanol content to the reaction volume, and this was true for ethanol use. For one gram of lignin sulfonate, the optimum conditions for modified lignin sulfonate production were determined to achieve maximum yield (93.14%), ethanol solvent content (41.74 ml) and time (120/59 min).

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