Method of producing compounds of lithium and optionally of other alkali metals

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43928603" target="_blank" >RIV/60461373:22310/23:43928603 - isvavai.cz</a>

Result on the web

<a href="https://www.ic.gc.ca/opic-cipo/cpd/eng/patent/3066286/summary.html?type=number_search&tabs1Index=tabs1_1" target="_blank" >https://www.ic.gc.ca/opic-cipo/cpd/eng/patent/3066286/summary.html?type=number_search&tabs1Index=tabs1_1</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Method of producing compounds of lithium and optionally of other alkali metals

Original language description

The invention provides a method for recovering lithium and optionally further alkali metal compounds, a mineral from the group of phyllosilicates containing lithium and optionally further alkali metals and also at least 0.2 wt. %, preferably at least 0.9 wt. %, of fluorine, is subjected to a thermal treatment in a furnace at a temperature within the range of from 1100 °C to 1700 °C, preferably at a temperature within the range of from 1220 °C to 1700 °C, at a pressure within the range of from 20 kPa to 150 kPa for a period of 15 to 360 minutes, in the presence of a reagent which contains a) at least one substance from a group comprising carbonates, oxides, hydroxides, sulfates, sulfites and chlorides of alkaline earth metals, in particular calcium; and b) at least one substance capable of releasing chlorine and/or hydrogen chloride and/or sulfur trioxide and/or sulfur dioxide during the thermal treatment, wherein the molar ratio of the total amount of sulfur trioxide and/or sulfur dioxide expressed as SO3 and/or of chlorine and/or hydrogen chloride expressed as Cl2 to the total amount of alkali metals including lithium, released from the silicate mineral in the reaction space in the furnace, is at least 0.5, the content of alkaline earth metals, in particular calcium, recalculated as the their oxide content, in the mixture of the phyllosilicate mineral with the reagent is at least 20 wt. %, and the fluorine content in the mixture of the phyllosilicate mineral with the reagent is from 0.1 to 2 wt. %, preferably from 0.2 to 2 wt. %, for decomposition of the structure of the phyllosilicate mineral and for volatilization of lithium compounds and optionally further alkali metal compounds from the thermally treated phyllosilicate mineral, and the compounds of lithium and optionally of further alkali metals are subsequently recovered by condensation by drawing off from 50 to 100 vol. % of flue gas formed in the furnace from the furnace from one or more different places having different temperatures., wherein the rate and volume of the drawn off flue gases from different places can be different for the selective recovery of compounds of individual alkali metals or their groups.

Czech name

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Czech description

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Type

P - Patent

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Patent/design ID

CA 3066286

Publisher

CZ001 -

Publisher name

Industrial Property Office

Place of publication

Prague

Publication country

CZ - CZECH REPUBLIC

Date of acceptance

Jan 3, 2023

Owner name

VŠCHT Praha

Method of use

A - Výsledek využívá pouze poskytovatel

Usage type

N - Využití výsledku jiným subjektem je možné bez nabytí licence (výsledek není licencován)