procedure
Yao et al. utilized a Deep Eutectic Solvent (DES) method to valorize lignocellulosic biomass (LCBs) for the production of Eucommia ulmoides rubber, a natural rubber composed of trans-1,4-polyisoprene. The process involves treating LCBs feedstock with DES (consisting of lactic acid and Zinc Chloride) at 120 °C for 2 hours, extracting lignin with a 1:1 (v/v) acetone-water mixture, precipitating the lignin with excess water, and recovering it via freeze-drying. The remaining solid substance is then subjected to alkali treatment for neutralization and mechanical treatment to recover the rubber.

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