Fractionation of sugar beet molasses by the Simulated Moving Bed (SMB) Ion Exclusion Process is in commercial use in many countries. The sugar-rich fraction (i.e. extract) obtained from this process is utilized in various ways during and after the regular beet campaign. Extract contains colorants which can complicate processes into which it is introduced. The colorants can be reduced using ion exchange resins, although this can create other problems. An alternative approach is a crystallization technique which enables the recovery of white sugar from highly-coloured syrups. For the latter approach, we used cooling crystallization, as this has been successful with both highly-coloured syrups and untreated raw juice. In our laboratory, a 3-stage cooling crystallization process was applied to the extract. Commercial white sugar was obtained from the 1st crystallization step, and by recycling the crystals recovered from the 2nd and 3rd stages. Elevated levels of betaine and raffinose (both...
Cooling crystallization of SMB-fractionated molasses.
SGUALDINO, Giulio;
1998
Abstract
Fractionation of sugar beet molasses by the Simulated Moving Bed (SMB) Ion Exclusion Process is in commercial use in many countries. The sugar-rich fraction (i.e. extract) obtained from this process is utilized in various ways during and after the regular beet campaign. Extract contains colorants which can complicate processes into which it is introduced. The colorants can be reduced using ion exchange resins, although this can create other problems. An alternative approach is a crystallization technique which enables the recovery of white sugar from highly-coloured syrups. For the latter approach, we used cooling crystallization, as this has been successful with both highly-coloured syrups and untreated raw juice. In our laboratory, a 3-stage cooling crystallization process was applied to the extract. Commercial white sugar was obtained from the 1st crystallization step, and by recycling the crystals recovered from the 2nd and 3rd stages. Elevated levels of betaine and raffinose (both...I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
