公开(公告)号：US20230051612A1

公开(公告)日：2023-02-16

申请号：US17903594

申请日：2022-09-06

Applicant: Worcester Polytechnic Institute

Inventor： Himanshu Tanvar ,  Brajendra Mishra

IPC: C01F7/0653 ,  C01F7/066

Abstract: Bauxite residue recovery includes mixing a solution of hydrochloric acid (HCL) according to a predetermined concentration, and adding the HCL solution to a quantity of raw red mud recovered from industrial operations as waste material. The highly alkaline property of the bauxite residue, commonly known as red mud is at least partially neutralized from the HCL, and makes the resulting washed red mud more amenable to subsequent uses in various applications in fields such as construction, wastewater treatment, and metal recovery processes. The process recovers washed red mud from the red mud and HCL solution by filtering the raw red mud and HCL solution for generating a stream of leach liquor from the filtrate and the recovered washed red mud from the residue. The neutralized red mud is further treated to extract metals such as calcium, iron, aluminum, silicon, and titanium.

公开(公告)号：US12049409B2

公开(公告)日：2024-07-30

申请号：US17547557

申请日：2021-12-10

Applicant: Worcester Polytechnic Institute

Inventor： Himanshu Tanvar ,  Brajendra Mishra

IPC: C01F7/0653 ,  C01F7/066

CPC classification number: C01F7/0653 ,  C01F7/066

Abstract: Bauxite residue recovery includes mixing a solution of hydrochloric acid (HCL) according to a predetermined concentration, and adding the HCL solution to a quantity of raw red mud recovered from industrial operations as waste material. The highly alkaline property of the bauxite residue, commonly known as red mud is at least partially neutralized from the HCL, and makes the resulting washed red mud more amenable to subsequent uses in various applications in fields such as construction, wastewater treatment, and metal recovery processes. The process recovers washed red mud from the red mud and HCL solution by filtering the raw red mud and HCL solution for generating a stream of leach liquor from the filtrate and the recovered washed red mud from the residue.

公开(公告)号：US20220185688A1

公开(公告)日：2022-06-16

申请号：US17547557

申请日：2021-12-10

Applicant: Worcester Polytechnic Institute

Inventor： Himanshu Tanvar ,  Brajendra Mishra

IPC: C01F7/0653 ,  C01F7/066

Abstract: Bauxite residue recovery includes mixing a solution of hydrochloric acid (HCL) according to a predetermined concentration, and adding the HCL solution to a quantity of raw red mud recovered from industrial operations as waste material. The highly alkaline property of the bauxite residue, commonly known as red mud is at least partially neutralized from the HCL, and makes the resulting washed red mud more amenable to subsequent uses in various applications in fields such as construction, wastewater treatment, and metal recovery processes. The process recovers washed red mud from the red mud and HCL solution by filtering the raw red mud and HCL solution for generating a stream of leach liquor from the filtrate and the recovered washed red mud from the residue.