公开(公告)号：US20230049318A1

公开(公告)日：2023-02-16

申请号：US17977408

申请日：2022-10-31

Applicant: HATCH LTC.

Inventor： Robert John Fraser ,  Henry Christian Immo Von Schroeter ,  Mark Joseph Machado

IPC: C01G1/10

Abstract: A treatment process for crystallizing a metal sulfate involving pre-treating a feedstock comprising calcium, magnesium, and/or lithium impurities, the pre-treating involving pre-leaching the feedstock in the presence of a lixiviant, selectively extracting a first portion of any of the impurities from the feedstock, and forming a leached solution comprising an uncrystallized metal sulfate and any remaining impurities; and/or refining the leached solution and removing a second portion of any of the remaining impurities; and crystallizing the uncrystallized metal sulfate from the leached solution to form a crystallized metal sulfate. So processed, the crystallized metal sulfate may be battery-grade or electroplating-grade.