Ammonium carbonate salt-based cane sugar juice clarifying, decolouring and decontaminating method

An ammonium carbonate, decolorization and impurity removal technology, applied in the purification of sugar juice, sucrose production, sugar production and other directions, can solve problems such as failure to popularize and apply, high cost, strong technicality, etc., and achieve mature production technology and utilization rate. High and simple effect of clarifying process

Inactive Publication Date: 2014-11-19
上海中道糖业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Regarding the decolorization technology of sugar juice, sugar workers from all over the world have conducted a lot of research, and successively proposed ion exchange, macroporous resin adsorption, membrane separation, ultra-freezing crystallization, biological enzymes, and inorganic-organic composite clarifiers and clarifiers. technology and other methods, but the cost is high and the technology is strong, and it has not been popularized and applied in our country.

Method used

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  • Ammonium carbonate salt-based cane sugar juice clarifying, decolouring and decontaminating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: To the clarification, decolorization and impurity removal of brown granulated sugar back-dissolving solution.

[0023] Take 100mL of 15wt% brown sugar redissolution solution, add 9mL of calcium hydroxide emulsion with a mass concentration of 10% and 1.1 g of ammonium carbonate, fully mix and react for 15 minutes, and heat to 70°C for the first time to remove the ammonia generated by the reaction After degassing (the escaped ammonia can be absorbed by water), add an appropriate amount of phosphoric acid solution (the volume ratio of phosphoric acid to water is 1:1) to neutralize until the pH value reaches 7.0. Acrylamide flocculant 6ppm is used for flocculation and sedimentation. After the flocs are separated, sugar juice after clarification, decolorization and impurity removal is obtained, and the decolorization rate is 52.9%.

Embodiment 2

[0024] Example 2: Clarification, decolorization and impurity removal of sugarcane mixed juice.

[0025] Take 100mL of sugarcane mixed juice, add 10.33g of calcium oxide emulsion with a mass concentration of 10% and 1.1g of ammonium carbonate, mix and react for 20 minutes, then heat to 70°C to remove the ammonia gas generated by the reaction, then add an appropriate amount of phosphoric acid solution (phosphoric acid and The volume ratio of water is 1:1) to neutralize until the pH value reaches 7.0, and then raise the temperature to 100°C, add polyacrylamide flocculant 5ppm for flocculation and sedimentation, and after separating the flocs, the sugar juice after decolorization and impurity removal is obtained. The decolorization rate is 32.09%.

Embodiment 3

[0026] Embodiment 3: To the clarification, decolorization and impurity removal of brown granulated sugar back-dissolving solution.

[0027] Take 100mL of brown granulated sugar redissolution solution with a concentration of 15 wt%, add 7.15g of calcium oxide emulsion with a mass concentration of 10% and 0.8g of ammonium carbonate, mix and react for 15 minutes, heat to 70°C to remove the ammonia gas generated by the reaction , add an appropriate amount of phosphoric acid solution (the volume ratio of phosphoric acid to water is 1:1) to neutralize until the pH value reaches 7.0, continue to heat up to 100°C, add polyacrylamide flocculant 4ppm for flocculation and sedimentation, and separate the flocs to obtain clarification The sugar juice after decolorization and impurity removal has a decolorization rate of 49.7%.

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Abstract

The invention relates to an ammonium carbonate salt-based cane sugar juice clarifying, decolouring and decontaminating method including the following steps: adding a proper amount of calcium hydroxide emulsion or calcium oxide emulsion and ammonium carbonate salt into sugar juice, fully mixing for reaction for 0 to 45 minutes; heating the sugar juice to 50 to 100 DEG C to remove ammonia produced by the reaction, regulating the sugar juice pH value to 7.0-7.5; continuing heating up to 70 to 100 DEG C, adding 1-15ppm of polyacrylamide flocculant for flocculating settling, and separating settled flocculate to obtain clarified, decoloured and decontaminated sugar juice. The ammonium carbonate salt is ammonium carbonate, ammonium hydrogen carbonate, crystal water-containing ammonium carbonate, or crystal water-containing ammonium hydrogen carbonate; and the sugar juice is mixed cane sugar juice, clear juice or syrup, or a brown granulated sugar redissolution solution; the ammonium carbonate salt (ammonium carbonate or ammonium hydrogen carbonate) is used for substitution of carbon dioxide gas for reacting with lime emulsion to produce calcium carbonate particles precipitate, the decontaminating method is used for clarifying, decolouring and decontaminating the sugar juice, and the clarifying, decolouring and decontaminating effect is good.

Description

technical field [0001] The invention relates to a method for clarifying, decolorizing and removing impurities of cane juice based on ammonium carbonate. Background technique [0002] Carbonation sugar production process is to pass carbon dioxide gas from lime kiln or boiler flue gas into pre-ash cane juice (or sugar juice) for reaction to obtain new calcium carbonate precipitation, and the new calcium carbonate precipitation particles absorb sugar juice Impurities such as pigments in the water, and then add flocculant aids for flocculation and sedimentation. The clarification, decolorization, and impurity removal effects of the carbon sugar production process are superior to those of the sulfurous acid process, such as high sugar recovery rate, low color value of white granulated sugar products, low sulfur residue, and no color change in storage of finished sugar. However, the carbonation process is still difficult to promote, and currently only a few sugar factories in Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/00C13B20/02C13B20/12
Inventor 李利军李彦青黄永春李青松
Owner 上海中道糖业有限公司
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