Separation membrane

JP2026090628APending Publication Date: 2026-06-02NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
NITTO DENKO CORP
Filing Date
2026-03-06
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

There is a need for new separation membranes suitable for efficiently separating hydrogen from hydrogen-containing gas mixtures, as existing membranes face issues with defects and decreased permeability due to protective layers.

Method used

A separation membrane design with a protective layer thickness ratio to the separation functional layer thickness ranging from 0.5 to 2.0, utilizing materials like polyamide and silicone resin, enhances the membrane's durability and permeability by protecting the functional layer from defects while maintaining high hydrogen permeation rates.

Benefits of technology

The proposed membrane design provides improved pressure resistance and hydrogen permeability, with helium permeation rates exceeding 100 GPU and high separation factors for hydrogen over nitrogen and carbon dioxide, effectively addressing the challenges of existing membranes.

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Abstract

This invention provides a novel separation membrane suitable for separating hydrogen from a hydrogen-containing gas mixture. [Solution] The separation membrane 10 of the present invention comprises a separation functional layer 1 and a protective layer 5 that protects the separation functional layer 1. The ratio A2 / A1 of the thickness of the protective layer 5 to the thickness A1 (μm) of the separation functional layer 1 is 0.5 or more and less than 2.0.
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