Verfahren zur Herstellung von Natriumcarbonat

Details

Veröffentlichungs-Nr.

EP4574767

Aktenzeichen

EP23219660

Anmeldetag

22. Dezember 2023

Veröffentlichung

25. Juni 2025

Rechtsraum

EP

IPC

C01D7/12C01D7/18C01F11/06C10L5/02C10L5/10C10L5/32C10L5/36C10L5/44

Abstract

A method for the manufacture of sodium carbonate or sodium bicarbonate, wherein said method comprises a limestone calcining step in a vertical shaft limekiln, to produce lime (CaO) and a gas comprising carbon dioxide (CO₂), using a limestone and a carbonaceous combustible,wherein said carbonaceous combustible comprises at least partly a biochar, compacted into briquettes, using one or several inorganic or organic binding agents, andwherein said briquettes having a particle size distribution so that:- at most 20% in weight of the briquettes are of size of more than 90 mm,- and at most 20% in weight of the briquettes are of size of less than 25 mm characterized in that:- the mass amount of the biochar reported to the briquette mass is at least 15 wt. % dry;- the briquettes comprise preferably at most 50 wt.% volatile matter;- the amount of the binding agent(s) and the compacting pressure are adjusted so that less than 2% by weight of briquette fines under 5 mm are generated by a fall of 6 meters-high of briquettes, dropped individually and quantified as a mean value measured on a sample of at least 5 briquettes from said carbonaceous combustible.

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Firma

Solvay SA

Land

🇧🇪 Belgien

Fachgebiete