In this process, lignin is extracted by pre-treating the biomass with acids such as sulphuric acid, nitric acid, hydrochloric acid, phosphonic acid, oxalic acid, and peracetate acid. For example, lignin biomass was treated with 0.5 to 1.4% dilute sulfuric acid at high temperatures between 165 and 195°C for 3 to 12 min, followed by washing with water. Treatment with dilute acid allows the extraction of lignin under relatively mild acidic conditions with high solubility and low production cost. The most crucial step in this process is the acid hydrolysis of the raw biomass, which releases soluble oligomers and monomeric sugars from the cell wall matrix to yield the porous structure of the biomass without affecting hemicellulose or lignin. This porous hemicellulose and lignin structure provides easy access to enzymes that may produce xylose, other fermentable sugars, and a biofuel precursor. After processing, lignin is left as a solid residue, but the overall conversion rate is relatively low, and the resulting lignin has sugar derivatives present in it. .