Sorbitol Project Introduction
Starch milk adjustment: Starch milk from starch workshop is adjusted to DS=28-32%, appropriate PH and temp. Or mix the dry starch and water, then adjust to reach the above conditions into the next section.
Liquefaction: Starch milk is liqueficated with the jet cooker and the aid of liquefaction enzyme. Two times of ejection are needed to get the better liquefaction effect. After liquefaction, the material is sent to the flash tank for cooling, and then to the next section.
saccharification: The liquefied syrup is sent to the saccharification tank. The reaction is carried out with the aid of enzyme. After a certain time of reaction, the desired DE value is reached. After that, the glucose is sent to the flash tank for cooling, then to next section.
Filtration and decolorization: Take the filter to remove the protein and other impurities from the glucose, then enters the decolorization filtration system. Decolorization requires activated carbon at the appropriate temp. After decolorization, the activated carbon will be removed by the filter. Then the filtered glucose is sent to the next section.
Continuous ion exchange: The glucose enters the continuous ion exchange system to remove the mixed impurity ions in the glucose through the cation and anion resin, so as to obtain the pure and high quality glucose.
Hydrogenation reaction: After burdening, the qualified syrup enters the reactor, and the high pres. Hydrogen is added for the hydrogenation reaction. Through the reaction, the glucose is converted to the crude sorbitol. After cooling by flash, the crude sorbitol is sent to the sedimentation tank.
Precipitation and filtration: After precipitation, the crude sorbitol passes through the filter to recover the small amount of nickel catalyst remaining in the sorbitol, then reuse to the front section. The filtered crude sorbitol goes into the refinery section.
Decolorization/filtration: The crude sorbitol enters the decolorization and filtration system. Decolorization requires activated carbon at the appropriate temp. After decolorization, the activated carbon will be removed by the filter. Then the filtered sorbitol is sent to the next section.
Continuous ion exchange: The sorbitol enters the continuous ion exchange system to remove the mixed impurity ions in the sorbitol through the cation and anion resin, so as to obtain the pure and high quality sorbitol.
Evaporation: The refined sorbitol is filtered through the safety filter and fed into the evaporator system for concentration to obtain the desired DS value of the sorbitol product.