A lignosulfonate was prepared from alkali-extracted corn stalk lignin (AEL) by oxidation under mild conditions and sulfomethylation. The oxidized AEL exhibited lower molecular weight, narrower molecular weight distribution, and higher phenolic hydroxyl content than AEL, demonstrating that oxidized AEL was more reactive than those before oxidation. The content of sulfonic groups was significantl...

Modification of sodium lignosulfonate (SLS) via combined oxidationsulfomethylation was employed to prepare concrete superplasticizer. It was found that the oxidation of SLS by peroxyacetic acid facilitated the subsequent sulfomethylation. After modification, both the molecular weight and sulfo group content were significantly increased, and thus the performance of SLS as water reducer was impro...

In the course of utilization of moso bamboo, some fractions are not effectively utilized due to the weakness in mechanical properties. Only a part of these residues are recovered for energy production or made into activated carbon; the remainder are discarded resulting in environment pollution (Mui et al., 2008). As the bamboo residue is a kind of polysaccharides-rich lignocellulosic material, ...

Sulfomethylation of radiata pine kraft lignin was performed using formaldehyde and sodium sulfite under alkaline conditions to determine its potential as a mineral depressant for the separation molybdenite chalcopyrite by froth flotation. Optimal sulfomethylation reaction were 20% (w/w) Na2SO3 at 130 °C 4.2 h, which resulted in with sulfonate content 2.2 mmol/g. Microflotation assays showed tha...

Lignin is one of the most important and widespread carbon sources on Earth. Significant amounts lignin are delivered to market by pulp mills biorefineries, there have been many efforts develop routes for its valorization. Over years, has used produce biobased chemicals, materials, advanced biofuels basis variable functionalities physicochemical properties. Today, lignin’s applications still lim...