Sugar juice decoloring agent and sugar juice purification decoloring method

Abstract

The invention relates to a sugar juice decoloring agent and a sugar juice purification decoloring method. A preparation method of the sugar juice decoloring agent comprises the steps of preparing calcium phosphate in remelted syrup of brown granulated sugar, wherein nonsugar such as pigment in the remelted syrup of the brown granulated sugar is embedded in the calcium phosphate (equivalent to the template molecules); after that, removing the nonsugar such as pigment by firing at high temperature so as to obtain calcium phosphate with a macroporous structure, wherein big holes pass through a whole framework, the specific surface area is 169m<2> / g, and the average pore size is 500nm. The macroporous calcium phosphate is added into the remelted syrup of the brown granulated sugar as the sugar juice decoloring agent; the decolorization rate of the macroporous calcium phosphate for sugar juice reaches 38.15% under the conditions that the amount of the macroporous calcium phosphate is 0.2g, the reaction time is 30min, the reaction temperature is 80 DEG C, and the pH value is equal to 6.00. Compared with calcium phosphate generated in pure water, the decolorization rate of the macroporous calcium phosphate is increased by 10.1%.

Description

technical field

[0001] The invention relates to a sugar juice decolorizing agent and a method for quietly decolorizing sugar juice. Background technique

[0002] Brown granulated sugar is the final product produced by one-step preparation of white granulated sugar. The thermal degradation products of sucrose produced during the high-temperature cooking process-caramel, Maillard reaction products-melanoidin and fructose alkaline degradation products and other pigments, resulting in red granulated sugar The color value is high, and the accumulation of impurities in the production process makes the content of non-sugar impurities high, therefore, resulting in low market demand and commodity value. Sugar enterprises generally use red granulated sugar to produce white granulated sugar through direct re-dissolution treatment or "interplanting method". However, production practice has found that sulfur bleaching treatment cannot fundamentally solve the problem of high color value ...

Examples

Embodiment 1

[0021] Embodiment 1: a kind of syrup decolorizing agent, it is prepared by following method:

[0022] (1) Pre-lime the brown sugar back-dissolving syrup (10°Bx) with milk of lime (10°Bé) to pH=6.80, heat the brown sugar re-dissolving syrup to 65°C in a constant temperature magnetic stirrer, and then add phosphoric acid ( 210 mg / kgBx, that is, the content of phosphoric acid in the red granulated sugar redissolving syrup is 210ppm per hammer), adjusted to neutrality with calcium hydroxide, heated to 100°C for the second time after stirring for 5 minutes, and added polyacrylamide (2 mg / kg , that is, add 2 mg of polyacrylamide to 1 kg of brown sugar redissolving syrup) flocculation and sedimentation, after standing for cooling for 30 minutes, recover the flocs to obtain calcium phosphate flocculation sediments;

[0023] (2) Calcium phosphate flocculation sediments were burned at a high temperature of 550°C for 3 hours, and the organic matter wrapped and adsorbed in the flocs was b...

Embodiment 2

[0024] Embodiment 2: A kind of method for the quiet decolorization of sugar juice, get the red granulated sugar redissolving syrup 100mL of 6.00 ° of Bx, add the macroporous calcium phosphate sugar juice decoloring agent that 0.2g embodiment 1 prepares, then adjust the pH value to 6.0 , reacted for 30 minutes at a temperature of 80°C, and the decolorization rate of macroporous calcium phosphate to sugar juice reached 38.15%.

Embodiment 3

[0025] Embodiment 3: A kind of method for the quiet decolorization of sugar juice, get the red granulated sugar redissolving syrup 100 mL of 6.00 ° of Bx, add the macroporous calcium phosphate sugar juice decoloring agent that 0.2g embodiment 1 prepares, then adjust the pH value to 5.0 , reacted for 30 minutes at a temperature of 80°C, and the decolorization rate of macroporous calcium phosphate to sugar juice reached 37.36%.

technical field

[0001] The invention relates to a sugar juice decolorizing agent and a method for quietly decolorizing sugar juice. Background technique

[0002] Brown granulated sugar is the final product produced by one-step preparation of white granulated sugar. The thermal degradation products of sucrose produced during the high-temperature cooking process-caramel, Maillard reaction products-melanoidin and fructose alkaline degradation products and other pigments, resulting in red granulated sugar The color value is high, and the accumulation of impurities in the production process makes the content of non-sugar impurities high, therefore, resulting in low market demand and commodity value. Sugar enterprises generally use red granulated sugar to produce white granulated sugar through direct re-dissolution treatment or "interplanting method". However, production practice has found that sulfur bleaching treatment cannot fundamentally solve the problem of high color value ...

Examples

Embodiment 1

[0021] Embodiment 1: a kind of syrup decolorizing agent, it is prepared by following method:

[0022] (1) Pre-lime the brown sugar back-dissolving syrup (10°Bx) with milk of lime (10°Bé) to pH=6.80, heat the brown sugar re-dissolving syrup to 65°C in a constant temperature magnetic stirrer, and then add phosphoric acid ( 210 mg / kgBx, that is, the content of phosphoric acid in the red granulated sugar redissolving syrup is 210ppm per hammer), adjusted to neutrality with calcium hydroxide, heated to 100°C for the second time after stirring for 5 minutes, and added polyacrylamide (2 mg / kg , that is, add 2 mg of polyacrylamide to 1 kg of brown sugar redissolving syrup) flocculation and sedimentation, after standing for cooling for 30 minutes, recover the flocs to obtain calcium phosphate flocculation sediments;

[0023] (2) Calcium phosphate flocculation sediments were burned at a high temperature of 550°C for 3 hours, and the organic matter wrapped and adsorbed in the flocs was b...

Embodiment 2

[0024] Embodiment 2: A kind of method for the quiet decolorization of sugar juice, get the red granulated sugar redissolving syrup 100mL of 6.00 ° of Bx, add the macroporous calcium phosphate sugar juice decoloring agent that 0.2g embodiment 1 prepares, then adjust the pH value to 6.0 , reacted for 30 minutes at a temperature of 80°C, and the decolorization rate of macroporous calcium phosphate to sugar juice reached 38.15%.

Embodiment 3

[0025] Embodiment 3: A kind of method for the quiet decolorization of sugar juice, get the red granulated sugar redissolving syrup 100 mL of 6.00 ° of Bx, add the macroporous calcium phosphate sugar juice decoloring agent that 0.2g embodiment 1 prepares, then adjust the pH value to 5.0 , reacted for 30 minutes at a temperature of 80°C, and the decolorization rate of macroporous calcium phosphate to sugar juice reached 37.36%.

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