SonyPatent applicationMaterials & manufacturingInterest 4/10

Sony patents cleaner carbon filter made from plant waste

Sony describes a method for making porous carbon filters from plant-based materials. The process involves heating the plants to high temperatures and then using acid or alkali under pressure to remove leftover silicon.

Why it mattersThis could lead to cleaner industrial filters or water treatment systems that use renewable plant sources instead of fossil fuels.

In the filing’s own words

The present technology improves a porous carbon material that uses a material of plant origin as a raw material and a method of producing the same, and the main object of the present technology is to provide a technology capable of reducing the amount of a residual silicon component in a material when producing the porous carbon material that uses a material of plant origin as a raw material. As a result of extensive research, the present inventors have found that it is useful to carbonize a material of plant origin and then perform acid or alkali treatment under pressurized conditions, and completed the method of producing a porous carbon material according to the present technology.

What exactly they claim (claim 1)

1. A method of producing a porous carbon material, comprising: carbonizing a material of plant origin at 400° C. to 1400° C. and then performing acid or alkali treatment under conditions of more than 0.1 MPa and not more than 25.0 MPa.

Facts

Company: Sony (Sony Group Corporation)
Official title: DISPERSION, ADSORBENT MATERIAL FOR PFAS, ENVIRONMENTAL IMPROVEMENT METHOD, POWDER FOR ENVIRONMENTAL IMPROVEMENT LIQUID, METHOD FOR DISPERSING POROUS CARBON MATERIAL, POROUS CARBON MATERIAL, AND FILTER
Publication number: US20260264044A1
Application number: 19135220
Filed: Jan 12, 2024
Published: Sep 10, 2026
Inventors: 4
Claims: 15

Classified under

B01J 20/20 Operations & transportB01J 20/28004 Operations & transportB01J 20/28064 Operations & transportB01J 20/28071 Operations & transportB01J 20/3078 Operations & transportC01B 32/324 Chemistry & metals

Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.