Process for recovering vanadium in the form of iron vanadate from a gasifier slag

US11879165B2 · kind B2 · utility

Assignee

• RELIANCE INDUSTRIES LIMITED · IN

Inventors

• Sateesh Daggupati · Khammam, IN
• Sachchit Majhi · Jamshedpur, IN
• Sukumar Mandal · Faridabad, IN
• Asit Kumar Das · Faridabad, IN
• Vishwanath Sapre Ajit · Tampa, US

Key dates

• Filing date: Feb 9, 2019
• Grant date: Jan 23, 2024
• Expiry date: Apr 5, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60° C. to 80° C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).