Method for recovering aluminum compounds and MMA from waste artificial marble via alkali treatment

Recovery of sodium aluminate and MMA from waste artificial marble via alkali treatment

This technology involves mixing waste artificial marble powder with sodium hydroxide to dissolve and react with aluminum hydroxide to produce sodium aluminate, which is then separated and recovered from PMMA through solid-liquid separation.

Conventional recovery methods suffer from high energy consumption due to thermal decomposition and difficulty in efficiently recovering aluminum compounds using alkalis.

By recovering sodium aluminate and PMMA through alkali treatment and solid-liquid separation without the need for thermal decomposition, this technology can be applied to waste recycling processes to recover resources with minimal energy.

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Key Features:

• A pretreatment process that selects and prepares powder with a uniform particle size to recycle waste artificial marble.
• A slurrying process that mixes sodium hydroxide with the selected waste artificial marble powder to dissolve the aluminum hydroxide and ensure fluidity.
• A reaction process that involves mixing the slurry with water and heating it at 60–200°C for 1–3 hours to produce sodium aluminate.
• A solid-liquid separation process that uses a separator to isolate sodium aluminate from the remaining solid PMMA.

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