Hebei Messi Biology Co., Ltd. stated that brown sugar is the end product of sugar production, with many impurities, high color value, and about 90% sugar. The purification of sugar juice is an important process for making high-quality sugar. Using activated carbon and macroporous resin as adsorbents to decolorize and remove impurities from sugar juice has become a classic method, which has been widely used in sugarcane sugar factories and starch sugar factories at home and abroad. Graded porous magnesium oxide has broad application prospects in catalysis, adsorption separation, medicine, functional additives and other fields due to its special morphology and surface properties, especially in the field of adsorption. In particular, porous magnesium oxide has a high specific surface area, active reaction sites, many transmission and diffusion channels, and controllable stability. These characteristics make porous magnesium oxide better than general oxides in terms of adsorption performance.
Magnesium oxide is an important inorganic chemical raw material, which occupies an important position in the national economy and has a wide range of applications in chemical industry, light industry, food, medicine, catalysis, ceramics, refractory materials, coatings and superconducting materials. Graded porous magnesium oxide is a basic metal oxide. Its surface has strong alkalinity, and the defects on the crystal surface of magnesium oxide make it have strong chemical adsorption capacity.
In the early days, foreign used magnesium oxide for refined sugar and achieved good decolorization effect. However, magnesium oxide adsorbent is not easy to filter, so it is difficult to separate it in industry; secondly, compared with slaked lime, the price of magnesium oxide adsorbent is higher and must be regenerated and recycled; thirdly, the sugar loss in magnesium oxide filter cake is large. Later, a Japanese patent reported that after mixing magnesium oxide with perlite or diatomaceous earth, the colored matter contained in the sugar solution can be removed, and the decolorization rate reaches 40%~90%. And the calcined mixture can be recycled for refined sugar solution, and it is also found that the loss of sugar is significantly reduced. In view of the good effect of magnesium oxide on decolorization of sugar juice.
This study uses porous magnesium oxide to achieve good decolorization effect with a small amount of use, and compares the decolorization test of commercially available magnesium oxide on sugar juice to optimize the decolorization process of porous magnesium oxide on sugar juice.