Separation of synthetic vanillin at different pH onto polymeric adsorbent Sephabeads SP206

Separation of Vanillin and Syringaldehyde from Oxygen Delignification Spent Liquor by Macroporous Resin Adsorption

“…3. The adsorption equilibrium constants b decrease with increasing temperature, which is consistent with the study of Zabkova et al [18]. The results listed in Tab.…”

Recovery, concentration and purification of phenolic compounds by adsorption: A review

“…ACs have been used as adsorbents in column studies performed with model phenol solutions (Aravindhan et al, 2009;Richard et al, 2010) and with real solutions (Camporro et al, 1994;Couteau and Mathaly, 1998;Rengaraj et al, 2002a;El-Shafey et al, 2005;Vázquez et al, 2007a). Column adsorption of model solutions has also been assayed using resins (Ferreira and Rodrigues, 1995;Abburi, 2003;Otero et al, 2005a, b;Zabkova et al, 2006;Pan et al, 2008;Liu et al, 2010a,b), synthetic polymers (Romo et al, 2008), low cost adsorbents (Banat and Al-Asheh, 2001a;Rengaraj et al, 2002b;Navia et al, 2006), naturally occurring biopolymers (Nadavala et al, 2009), and biomass (Kumar et al, 2009a,b). Phenolic compounds from food products or byproducts can be selectively separated using low cost lignocellulosics (Sakanaka, 2003), resins (Grohmann et al, 1999;Di Mauro et al, 2000;Broadhurst and Rein, 2003;Chautard and Mayrand, 2003;Schieber et al, 2003;Manthey, 2004;Berardini et al, 2005;Fu et al, 2005;Achaerandio et al, 2007;Scordino et al, 2007;Díaz-Reinoso et al, 2010;Lu et al, 2010) and clay (Lopes et al, 2007).…”

“…The non thermal regeneration cuts the energy costs, enabling applications in the food and pharmaceutical sectors (Geng et al, 2009). Literature is available on the adsorption of phenolics in macroporous resins without functional groups (Juang and Shiau, 1999;Ku and Lee, 2000;Abburi, 2003;Zabkova et al, 2006), chemically modified (Li et al, 2001), crosslinked (Li et al, 2002a;Li et al, 2002b;Wang et al, 2004;Sun et al, 2005a andSun et al, 2005b;Zhang et al, 2006 andZhang et al, 2008;Zeng et al, 2009), or containing derivatives (Pan et al, 2005;Sun et al, 2005a,b;Zhang et al, 2009a). Ion-exchange resins are composed of a polymer matrix, based on inorganic compounds, polysaccharides, or synthetic resins, and a functional group.…”

An integrated process to produce vanillin and lignin-based polyurethanes from Kraft lignin

“…The acidification step is to precipitate the compounds of high molecular weight (MW) and a large amount of acidic solution is required. Furthermore, it is possible that vanillin is lost during this process, since vanillin may be co-precipitated during the acidification step of the lignin (Craig and Logan, 1962;Fargues et al, 1996a;Zabkova et al, 2006). Accordingly, the traditional precipitation procedure, either by using toxic chemicals or by the waste generation, is an option to be changed by more satisfactory solutions.…”