Sugar juice decoloring method

Abstract

The present invention discloses a sugar juice decoloring method. The method comprises the following steps: during a sugar making process, ClO2 is used for decoloring a sugar juice; the sugar juice refers to any one, two, three or four of a clear juice coming out of a clarification section, crude syrup or re-dissolution syrup coming out of an evaporation section, or massecuite coming out of a crystallization section; CIO2 is respectively added to any one, two, three, or four of the clear juice, the syrup or the messecuite; any one, two, three or four of the four sugar juices are respectively or simultaneously oxidized and declored; the amount of CIO2 added into the sugar juice is 0.0005 percent to 0.3 percent of the weight of the sugar juice; and the adding method is that CIO2 is directly added toa corresponding sugar juice, and the sugar juice is fully mixed and reacted with CIO2 during a flow and pumping process, so as to achieve the aim of oxidation and decoloration. The sugar juice decoloring method of the invention can effectively reduce the color value of the sugar juice, reduce the color value of a product sugar and the residue of sulfur, and simultaneously improve the purity and the quality of the sugar.

Description

Technical field: [0001] The invention relates to a sugar production process, in particular to a method for reducing the color value of sugar juice in the sugar production process. Background technique: [0002] The color value of white granulated sugar is the most important and most technically difficult quality index of white granulated sugar. There are many and complex types of colored substances in sugar products, including two types of colored substances originally contained in sugarcane and those produced during the production process. The original pigments contained in sugarcane are mainly fat-soluble and water-soluble. The former coexists with lipids in sugarcane juice and is basically insoluble in water. Most of them can be removed when heated. Water-soluble pigments are mainly various polyphenols, which are the main reason for coloring white granulated sugar and various sugar products. On the other hand, in the sugar production process, in addition to clarificatio...

AI Technical Summary

Problems solved by technology

For example, the combination of sulfurous acid method and phosphorus flotation method can effectively reduce the sulfur content in sugar products, but it has the disadvantages of lengthening the process flow, causing additional loss of sucrose and increase in color value; therefore, the development of highly efficient sugar juice decolorizer Or a new method of sugar juice decolorization, effectively supplementing or improving the clarification process of the sulfite method, is one of the reform directions of the sugar clarification process, and is also a problem that the sugar industry hopes to solve at present