Rice straw black liquor

This study, the rice straw was pretreated with sodium hydroxide as the step of rice straw pretreatment in bioethanol production, and then lignin was recovered by acidification method. The obtained lignin was characterized by Fourier-transform infrared (FT-IR) and X-ray powder diffraction (XRD) to confirm the chemical structure, inorganic matter. To produce sodium lignosulfonate (NaLS), the sulfomethylation was conducted between lignin, formalin, and sodium sulfite.

10p nguaconbaynhay11 01-04-2021 33 1   Download

The utilization of black liquor, produced by the pulp and paper industry in Egypt, as a workability aid and set retarder admixture has been investigated. This approach may help eliminate the environmentally polluting black liquor waste. It also provides a low cost by-product, which can be widely used in the construction industry. The properties of black liquor and its performance on concrete at two different ratios of water to cement have been studied. The results revealed that black liquor from rice straw pulp increases concrete workability, improves compaction, and reduces honeycombing.

7p kethamoi1 20-11-2019 22 1   Download