Acetic Acid Removal From the Hydrolysate Using Reactive Extraction In a Membrane Extractor/Reactor
- Type: Conference Presentation
- Conference Type: AIChE Annual Meeting
- Presentation Date: October 18, 2011
- Duration: 30 minutes
- Skill Level: Intermediate
- PDHs: 0.50
We propose to remove the acetic acid with an alternative process whereby acetic acid is extracted into 1-octanol in a membrane extractor and reacted with 1-octanol in situ using a membrane containing an embedded catalyst to yield 1-octyl acetate. Acetic acid concentration in the hydrolysate will be reduced from 12.5 g/L to < 1 g/L. The product ester will be removed periodically from the organic phase. The product has very good solvent properties and can be sold to improve process economics.
In our study, we prepare membranes with a suitable catalyst (initial efforts utilize strong acid ion exchange resins) embedded in the membranes to achieve extraction and reaction in a single step. The effects of catalyst concentration, operating temperature and flow rates are investigated to optimize the performance of the process. Thus, the membrane extractor/reactor removes acetic acid from the hydrolysate and produces a valuable by-product in an environmentally friendly process.
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