Zinc aluminum silicate/granular red mud composite material of Zn2+-modified industrial waste red mud, preparation method and application thereof

Patent metadata

Field	Value
Publication number	US-12280356-B2
Application number	US-202418638003-A
Country	US
Kind code	B2
Filing date	Apr 17, 2024
Priority date	May 5, 2023
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A zinc aluminium silicate nanoparticles/granular red mud (ZAS/GRM) composite material of Zn2+-modified industrial waste red mud and a preparation method and application thereof are disclosed, belonging to the technical field of adsorbent preparation. The industrial waste red mud is used as a raw material to prepare Zn2+-modified red mud for ZAS/GRM adsorbent.

First claim

What is claimed is:

1. A preparation method of a ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud, comprising following steps:
S 1 , adding red mud, fly ash, a binder and a pore-forming agent into water for mixing, then carrying out granulation to obtain GRM, and then carrying out air drying and roasting on the GRM to obtain porous GRM particles; and
S 2 , immersing the porous GRM particles into a solution containing Zn 2+ , stirring, filtering and drying to obtain a zinc aluminum silicate/granular red mud adsorbent, a ZAS/GRM adsorbent, then obtaining a ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud by subjecting the ZAS/GRM adsorbent to roasting treatment.

2. The preparation method of the ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud according to claim 1 , wherein in the S 1 , a particle size of the GRM is 5-10 mm; a duration of the air drying is 10-48 h; and technological parameters of the roasting are: preheating at 573-973 K for 0.1-2 h, and baking at 873K-1773K for 20-90 min.

3. The preparation method of the ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud according to claim 1 , wherein in the S 1 , the solution containing Zn 2+ is a ZnCl 2 , ZnSO 4 or ZnCO 3 solution, and a concentration of the solution containing Zn 2+ is 0.10-0.30 mol·L −1 .

4. The preparation method of the ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud according to claim 1 , wherein in the S 2 , a dosage ratio of the porous GRM particles to the solution containing Zn 2+ is (1.0-15) g:(20-100) mL.

5. The preparation method of the ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud according to claim 1 , wherein in the S 2 , the stirring is continued for 10 to 48 h at a speed of 200 to 900 rpm; and a temperature for the drying is 333-600 K.

6. The preparation method of the ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud according to claim 1 , wherein in the S 2 , a technological parameter of the roasting treatment is: roasting at 673-973 K for 1-5 h.

7. A ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud prepared by the preparation method of the ZAS/GRM composite material of Zn 2+ -modified industrial waste red mud according to claim 1 .

Assignees

• Shaanxi Univ Of Science & Technology

Inventors

• Yang Yanling
• Chen Jingeng
• Chen Zhigang
• Sun Yu
• Chen Yuefeng
• Luo Zhao
• Zhang Chenguang
• Wu Tiandong
• Tian Xuefeng
• Chen Huajun

Classifications

• B01J20/3085

  Chemical treatments not covered by groups B01J20/3007 - B01J20/3078 · CPC title

• B01J20/3078

  Thermal treatment, e.g. calcining or pyrolizing · CPC title

• B01J20/3064

  Addition of pore forming agents, e.g. pore inducing or porogenic agents · CPC title

• B01J20/3042

  Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent · CPC title

• B01J20/3028

  Granulating, agglomerating or aggregating · CPC title