Systems and methods for producing alkali hydroxides and sulfuric acid or hydrochloric acid

EP4766468A1Pending Publication Date: 2026-07-01INNOVATOR ENERGY LLC
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
INNOVATOR ENERGY LLC
Filing Date
2024-08-23
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

The challenge lies in effectively converting sodium sulfate waste streams into valuable products like sodium hydroxide and sulfuric acid, while addressing the issue of significant impurities such as heavy metals and the energy-intensive nature of existing methods.

Method used

The proposed solution involves a series of chemical reactions and processes that utilize magnesium and sulfur dioxide intermediates to produce sodium hydroxide, sulfuric acid, and calcium oxide from sodium sulfate, while also incorporating methods for impurity removal and energy efficiency.

Benefits of technology

This approach enables the efficient conversion of sodium sulfate waste into valuable chemicals, reduces energy consumption, and effectively removes impurities, thereby promoting a circular economy and reducing environmental impact.

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Abstract

In some embodiments the application pertains to processes comprising reacting a component comprising an alkaline earth weak acid with a component comprising an acid to form a component comprising an alkaline earth acid anion and a component comprising a weak acid derivative. At least a portion of the component comprising the alkaline earth acid anion is reacted with a component comprising an alkali sulfate to form a component comprising alkaline earth sulfate and a component comprising an alkali acid anion. At least a portion of the component comprising alkaline earth sulfate is decomposed to form a component comprising alkaline earth oxide, or alkaline earth hydroxide, or alkaline earth carbonate, or alkaline earth sulfide, or a derivative thereof, or any combination thereof, and a component comprising sulfur dioxide, or oxygen, or sulfur trioxide, or a derivative thereof, or any combination thereof.
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