Strategies for the Upgrade of a TBZC Product (Tetra Basic Zinc Chloride) by Selective Removal of the Impurity Chlorine

Research output: Chapter in Book/Report/Conference proceedingConference contribution


When recycling materials containing zinc in hydrochloric acid processes, the precipitation of zinc can lead to the formation of various compounds which can be assigned to the group of zinc hydroxide chlorides. This paper compares different approaches for the selective removal of chlorine from tetra basic zinc chloride to obtain a cleaned zinc product. The removal of chlorine via soda leaching at atmospheric conditions as well as under overpressure in an autoclave was investigated. Furthermore, concepts were considered in which the chlorine can be evaporated as a compound and thus separated via selective temperature and atmospheric control. Thereby, a focus is on the simulation of pyrohydrolysis and clinkering for the separation of chlorine via gaseous compounds whereby zinc remains and can be brought to further processing. The simulations with multivariant parameters are carried out using the thermochemical calculation software package FactSage.
Original languageEnglish
Title of host publicationTMS 2022
Subtitle of host publication151st Annual Meeting and Exhibition Supplemental Proceedings
PublisherSpringer Cham
Number of pages14
ISBN (Electronic)978-3-030-92381-5
ISBN (Print)978-3-030-92380-8
Publication statusPublished - 7 Feb 2022
Event151st Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2022 - Anaheim, United States
Duration: 27 Feb 20223 Mar 2022

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696


Conference151st Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2022
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright: © 2022, The Minerals, Metals & Materials Society.


  • Chlorine removal
  • Hydrometallurgical chlorine extraction
  • Pyrometallurgical chlorine extraction
  • Tetra basic zinc chloride

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