Recovery of vanillin from lignin/vanillin mixture by using tubular ceramic ultrafiltration membranes
作者： M. Žabková , E.A. Borges da Silva , A.E. Rodrigues
DOI: 10.1016/J.MEMSCI.2007.06.025
关键词:
摘要: Abstract The aim of this work is to evaluate the membrane ultrafiltration process for recovery vanillin from Kraft lignin oxidation media. Tubular ceramic membranes with molecular weight ( M w ) cut-off 1, 5 and 15 kDa are investigated. influence concentration pH mixture on performance studied in batch mode. Permeate flux, content retentate permeate streams were measured. A theoretical model used calculate variation profile within polarization layer estimate surface during operation. values obtained at suggests that there a growth gel higher operating conditions used. By filtrating lignin/vanillin 60/6 g L −1 12.5 using 1 kDa membrane, observed rejection was 0.972. On other hand, small leads significant decline flux compared larger cut-off. It very high cleaning efficiency can be sodium hydroxide solution.
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