Method for discoloring synanthrin by using ion exchange fiber
An ion exchange fiber and technology of exchange fiber, which is applied in the field of decolorization of inulin by ion exchange fiber, can solve the problems of serious filter mud pollution, low sugar recovery rate, large CaO consumption, etc., and achieve simple treatment method, strong anti-pollution ability, Environmentally friendly effect
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Embodiment 1
[0013] (1) Pretreatment: cation exchange fibers and anion exchange fibers were respectively soaked in pure water for 24 hours, and then wet-packed to remove air bubbles between the ion exchange fibers. After filling, the cation exchange fiber was first washed with 4% HCl until acidic, and then washed with pure water until neutral; then the fiber was converted to sodium form by passing through the column with 4% NaOH, and then washed with pure water Wash until neutral. The anion exchange fiber is first washed with 4% NaOH to be alkaline, and then washed with pure water to neutral; then the fiber is converted to chlorine type by passing through the column with 4% HCl, and then washed with pure water to neutral .
[0014] (2) Pass the filtered inulin juice through a cation-exchange fiber column at a column temperature of 60°C, with a flow rate of SV=20, a packing density of 100g / L, and a packing diameter-to-height ratio of the ion-exchange fiber column of 1:8 .
[0015] (3) Th...
Embodiment 2
[0018] (1) Pretreatment: cation exchange fibers and anion exchange fibers were respectively soaked in pure water for 24 hours, and then wet-packed to remove air bubbles between the ion exchange fibers. After filling, the cation exchange fiber is first washed with 1% HCl to acidity, and then washed with pure water to neutral; then the fiber is converted to sodium form by passing through the column with 1% NaOH, and then washed with pure water Wash until neutral. The anion exchange fiber is first washed with 1% NaOH to be alkaline, and then washed with pure water to neutral; then the fiber is converted to chlorine type by passing through the column with 1% HCl, and then washed with pure water to neutral .
[0019] (2) Pass the filtered inulin juice through a cation-exchange fiber column at a column temperature of 80°C, with a flow rate of SV=30, a packing density of 200g / L, and a packing diameter-to-height ratio of the ion-exchange fiber column of 1:10 .
[0020] (3) The inul...
Embodiment 3
[0023] (1) Pretreatment: cation exchange fibers and anion exchange fibers were respectively soaked in pure water for 24 hours, and then wet-packed to remove air bubbles between the ion exchange fibers. After filling, the cation exchange fiber was first washed with 3% HCl until acidic, and then washed with pure water until neutral; then the fiber was converted to sodium form by passing through the column with 3% NaOH, and then washed with pure water Wash until neutral. The anion exchange fiber is first washed with 3% NaOH to be alkaline, and then washed with pure water to neutral; then the fiber is converted to chlorine type with a mass fraction of 3% HCl, and then washed with pure water to neutral .
[0024] (2) Pass the filtered inulin juice through a cation-exchange fiber column at a column temperature of 50°C, with a flow rate of SV=5, a packing density of 10g / L, and a packing diameter-to-height ratio of the ion-exchange fiber column of 1:1 .
[0025] (3) The inulin juic...
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