In the Bayer Process, spent liquor is depleted in aluminium trihydroxide but rich in caustic

Product
Spent Caustic Liquor
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Kokel, Nicolas
2/26/2026 8:49 PM


  Bayer Process simplified block flow diagram showing spent caustic following the precipitation stage

Spent caustic liquor is the residual process solution generated in the Bayer Process after aluminium trihydroxide (Al(OH)โ‚ƒ) has been crystallised and separated from the supersaturated pregnant sodium aluminate liquor.

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