(102b) Adsorption Processes for Recovery and Enrichment of Organic Acids from Kraft Black Liquor
AIChE Annual Meeting
Monday, November 8, 2021 - 12:30pm to 12:49pm
In this talk we will discuss the adsorption properties of activated carbon adsorbents for separation of organic acids from the other constituents (inorganics, water) of kraft black liquor, and the development of an adsorption-based process for recovery and enrichment of organic acids. We present comprehensive packed-bed column adsorption measurements and analysis to thoroughly characterize the multicomponent adsorption phenomena and develop a cyclic operation scheme for the adsorption process. Methanol is used as a desorbent in this process. We have successfully obtained enriched organic acid mixtures (12-15 wt% on desorbent-free basis) in a single-stage operation with extended cyclic experiments. The productivity and selectivity of the adsorption process will be discussed in detail.