CM-PATRA / record

Low-temperature process for recovery of alumina from different sources

Publication

WO-2025233969-A1 on Google Patents

Filed / published / granted

2025-05-08 / 2025-11-13 / n/a

Offices

WO

Applicants

IIT Kharagpur (IN, academic)

Minerals

Aluminium (not on list)

Stages

Compounds and materials

Waste stream

None named in the English text

CPC

C01P2002/72, C01F7/441, C01F7/0646, C01F7/142

Abstract (first 170 chars)

The present invention relates to a low-temperature method of recovery of alumina from various alumina-containing resources. The method comprises the steps of treating an alumina- containing resource with Sodium Hydroxide (NaOH) at a predefined low temperature in presence of water (5-50%), and leaching the treated alumina-containing resource with hot water to dissolve Sodium Aluminate (NaAlO₂) and produce leachate. The method further comprises causing precipitation of Aluminium Hydroxide (Al(OH) 3 ) by reacting the leachate with CO 2 so as to convert the Sodium Aluminate (NaAlO₂) to Aluminium