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US 10,767,267 B2Granted
Anticorrosion material produced from date palm tree waste
AssigneeUnited Arab Emirates University
InventorsAli Humaid Mohamed Hassan Al-Marzouqi, Nour Shehadeh Abdelrahman, Aysha Mohammed Al Ahbabi, Aamna Ebrahim Almusharrakh, Amna Sultan Al Ali, Sara Hareb Al-Ketbi
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Abstract
Anti-corrosion material is produced from date palm tree waste by extracting lignin and modifying by sulfonation. The anti-corrosion material produced from date palm tree waste is non-toxic and effective at preventing or reducing corrosion of, for example, metals subject to corrosive environments, and particularly marine environments.
Claims8
A method of making a sodium lignosulfonate corrosion inhibitor, comprising the steps of:
- providing a quantity of date palm tree waste;
- removing the extractives from the date palm tree waste to produce an extractive-free biomass, wherein the extractives are removed in an ethanol-benzene extraction solvent mixture;
- extracting lignin from the extractive-free biomass;
- immersing the lignin in alkaline media;
- adding formaldehyde to the lignin immersed in alkaline media to methylolate the lignin;
- adding sodium sulfite to the methylolated lignin to sulfonate the lignin, the methylolated and sulfonated lignin immersed in the alkaline media forming a reaction mixture;
- heating the reaction mixture at 100° C. with stirring for 3 hours to complete sulfonating the lignin;
- adding 25M sulfuric acid to the reaction mixture to precipitate sodium lignosulfonate;
- centrifuging, washing, and drying the precipitated sodium lignosulfonate;
- and
- recovering the sodium lignosulfonate in paste form.
8 more elements
Dependencies are inferred from the claim text.