US 11,718,688 B2
Hydroxyethyl cellulose derived from biomass and use of hydroxyethyl cellulose in brine treatment
Ameera Fares Mohammad, Al Ain (AE); Ali H. Al-Marzouqi, Al Ain (AE); Emmanuel Galiwango, Al Ain (AE); Essa Georges Lwisa, Al Ain (AE); and Jawad Mustafa, Al Ain (AE)
Assigned to UNITED ARAB EMIRATES UNIVERSITY, Al Ain (AE)
Filed by UNITED ARAB EMIRATES UNIVERSITY, Al Ain (AE)
Filed on Aug. 19, 2020, as Appl. No. 16/997,533.
Prior Publication US 2022/0056156 A1, Feb. 24, 2022
Int. Cl. C08B 11/02 (2006.01); C09K 8/588 (2006.01)
CPC C08B 11/02 (2013.01) [C09K 8/588 (2013.01)] 4 Claims
OG exemplary drawing
 
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.