Study On The Refining Technology Of Inulin

Inulin and its downstream products as a functional food additives have been widely applied in the world, recent years, the development and utilization of inulin attaches great attention worldwide, and research associated was very active. But the research and development of this area in China started very late, the scale of industrial production was too small to meet the domestic and international market. So it is significant to both high-purity inulin production and refine art research of industrial large scale production.This paper studied some workmanship operations, crude extraction liquid of Jerusalem artichoke was used as raw materials which was clarified by carbon filled with ash, decolorizied by activated carbon, desalinatied by ion resin, dried by spray, and finally got high quality Inulin of more than 95 percent purity. The conclusions are drawn within the optimization of process and condition.First, confirmed the method of carbonation process used to clarify the exaction liquid of Inulin can remove protein,pectinand other macromolecules impurities. the result of optimization in workmanship showed that the best workmanship is to increase the ph to 13.4±0.1 by adding CaO first, and then decrease the ph to 6.8±0.1 by filling CO2 gas, in this process the reaction temperature must be controlled in 80±2℃,and the result is the removal rate of protein is 81.6%,with the 3.4% loss of total carbohydrate.Second, study confirmed that Activated Carbon Treatment which was used to decolored Jerusalem artichoke is effective, and identified the best decolorization workmanship by activated carbon through single-factor test and Orthogonal test, the workmanship was to decolor in 50±2℃; 2% quantity by 40min. In addition, activated carbon isothermal adsorption showed that the adsorption isotherm model meet Langmuir the adsorption isotherm formula.Third, D290 anion resin was used to remove the ion pigment in the Jerusalem artichoke extraction liquid by adsorption function, and D001 cation resin remove the cation by exchange function. The test showed that is a very high effective way for desalination. Static single factor test of ion exchange showed that it's best workmanship was to react in 50±2℃; 2% quantity by 3h. At last, spray drying was used to isolate water, we could get delicate white powder of Inulin. Product Analysis showed that the content of Inluin was more than 95%.