CPC C08B 11/02 (2013.01) [C09K 8/588 (2013.01)] | 4 Claims |
1. A method of making hydroxyethyl cellulose derived from biomass, comprising the steps of:
providing a biomass, wherein the biomass is selected from the group consisting of plant waste biomass and date palm waste;
extracting the biomass to produce an extractive-free biomass;
acid leaching the extractive-free biomass to obtain a cellulose/lignin-rich residue;
alkali treating the cellulose/lignin-rich residue with sodium hydroxide to produce a cellulose-rich residue;
bleaching the cellulose-rich residue to obtain bleached cellulose, wherein the bleaching at 75° C. with 15 wt. % acetic acid, 20 wt. % hydrogen peroxide, and 10 wt. % sulfuric acid; and
hydroxyethylating the bleached cellulose using 7.5 wt. % sodium hydroxide and 11 wt. % aqueous urea to produce alkaline hydroxyethyl cellulose.
|