Synthesis of positively charged hydrogels for anionic pollutant removal

Patent metadata

Field	Value
Publication number	US-12084359-B1
Application number	US-202418403431-A
Country	US
Kind code	B1
Filing date	Jan 3, 2024
Priority date	Jan 3, 2024
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Lignocellulose based hydrogels (LCHs) derived from date palm (DP) waste that can be used to overcome water treatment challenges, as well as a preparation method and application thereof.

First claim

We claim:

1. A method for making a lignocellulose based hydrogel from date palm waste, the method comprising:
obtaining date palm waste;
isolating lignocellulose from the date palm waste to obtain isolated lignocellulose;
treating the isolated lignocellulose with methacrylic anhydride in the presence of trimethylamine to obtain a lignocellulose incorporating methacrylate;
purifying the lignocellulose incorporating methacrylate;
copolymerizing the purified lignocellulose incorporating methacrylate with aziridine and 4,4′-diselanediyldianiline; and
obtaining the lignocellulose based hydrogel.

2. The method for making a lignocellulose based hydrogel from date palm waste of claim 1 , wherein the isolated lignocellulose is treated with an excess of the methacrylic anhydride.

3. The method for making a lignocellulose based hydrogel from date palm waste of claim 1 , wherein the purifying is conducted by washing the lignocellulose incorporating methacrylate functionalities with ethanol followed by vacuum drying.

4. The method for making a lignocellulose based hydrogel from date palm waste of claim 3 , wherein the purifying is conducted at room temperature.

5. The method for making a lignocellulose based hydrogel from date palm waste of claim 1 , wherein the date palm waste is obtained from date palm trees grown in Saudi Arabia.

6. The method for making a lignocellulose based hydrogel from date palm waste of claim 1 , wherein the lignocellulose based hydrogel is positively charged.

Assignees

• Univ King Faisal

Inventors

• Shaaban Saad
• Ahmed Hany Mohamed Abd El-Lateef
• Shalabi Kamal

Classifications

• C02F1/286 Primary

  using natural organic sorbents or derivatives thereof · CPC title

• C08L97/02 Primary

  Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} · CPC title

• C02F2101/20

  Heavy metals or heavy metal compounds · CPC title

• C02F2101/30

  Organic compounds · CPC title