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Method for decolorization of sugar juice with water-soluble magnesium salt-lime

A water-soluble magnesium and sugar juice technology, applied in the purification of sugar juice, sugar production, application, etc., to achieve the effect of simple process, high decolorization rate and low cost

Inactive Publication Date: 2020-02-14
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of polysilicate zinc as a flocculant and the use of water-soluble magnesium salt-lime for decolorization of sugar juice

Method used

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  • Method for decolorization of sugar juice with water-soluble magnesium salt-lime
  • Method for decolorization of sugar juice with water-soluble magnesium salt-lime
  • Method for decolorization of sugar juice with water-soluble magnesium salt-lime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Take 100 mL brown sugar redissolving syrup of 10°Bx in a 250mL beaker, add magnesium sulfate to make the magnesium ion content 500mg / L, then adjust the pH value to 11 with milk of lime, and keep it at 30°C After stirring for 10 minutes, add 2.5mL of zinc polysilicate with a mass concentration of 2% and stir rapidly (300r / min) for 30s, then switch to medium-speed stirring (200r / min) for 10min, and then switch to slow-speed stirring (30r / min) After 5 minutes, take out the beaker and place it at room temperature, and wait until the flocculation and sedimentation are stable to obtain clear juice, and the decolorization rate is 92.45%.

Embodiment 2

[0023] Example 2: Take 100 mL brown sugar redissolving syrup of 10°Bx in a 250mL beaker, add magnesium sulfate to make the magnesium ion content 500mg / L, then adjust the pH value to 11 with milk of lime, and keep it at 30°C After stirring for 10 minutes, add 2.2mL of zinc polysilicate with a mass concentration of 2% and stir rapidly (300r / min) for 30s, then switch to medium-speed stirring (200r / min) for 10min, and then switch to slow-speed stirring (30r / min) After 5 minutes, take out the beaker and place it at room temperature, and wait until the flocculation and sedimentation are stable to obtain clear juice, and the decolorization rate is 92.21%.

Embodiment 3

[0024] Example 3: Take 100 mL brown sugar redissolving syrup of 10°Bx in a 250mL beaker, add magnesium nitrate to make the magnesium ion content 450mg / L, then adjust the pH value to 11 with milk of lime, and keep at 30°C After stirring for 10 minutes, add 2.25mL of zinc polysilicate with a mass concentration of 2% and stir rapidly (300r / min) for 30s, then switch to medium-speed stirring (200r / min) for 10min, and then switch to slow-speed stirring (30r / min) After 5 minutes, take out the beaker and place it at room temperature, and wait until the flocculation and sedimentation are stable to obtain clear juice, and the decolorization rate is 91.32%.

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Abstract

The invention relates to a method for decolorization of sugar juice with water-soluble magnesium salt-lime. The specific steps include: adding a water-soluble magnesium salt into sugar juice, then regulating the pH value with lime milk, performing stirring continuously at certain temperature, then adding zinc polysilicate, conducting stirring at different speeds for certain period of time respectively, and performing flocculation sedimentation to a stable state, thus obtaining clear juice. The invention provides the water-soluble magnesium salt-lime method for clarification and decolorizationof sugar juice, zinc polysilicate is adopted as a flocculant, the decolorization rate is up to 92.21%, also the process is simple and low in cost, does not adopt toxic or harmful substances, belongs to a green clarification and decolorization process, and has important application prospect in the sugar industry. The principle of the method provided by the invention lies in that: a magnesium salt serves as an inorganic decolorizing agent for coagulation reaction under an alkaline condition to generate magnesium hydroxide, non-sugar substances in sugar juice are adsorbed or embedded, then zinc polysilicate is employed as the flocculant for flocculation and clarification, so that a satisfactory result can be achieved.

Description

technical field [0001] The invention relates to a method for decolorizing sugar juice with water-soluble magnesium salt-lime, which belongs to the field of clarifying and decolorizing sugar juice. Background technique [0002] Brown sugar, as the final crystallization product in the sugarcane sugar production process, has high color value and impurity content, and low market value. Directly cooking brown sugar often affects the quality of finished white sugar. Therefore, seeking a new type of high-efficiency decolorizing agent for decolorizing and removing impurities of brown sugar resolvable syrup has become a research focus in the sugar industry in recent years, and it is also a difficult point. [0003] At present, the clarification and decolorization processes in the sugar industry mainly include lime method, sulfurous acid method, carbonic acid method, activated carbon adsorption method, and hydrogen peroxide oxidation method, etc., but there are problems such as poor c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/00C13B20/02
CPCC13B20/02C13B20/005
Inventor 李利军程昊李蔚霞杨岚凤孔红星黄文艺李彦青冯军
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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