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Purification method using a low granulometry resin

A resin and resin regeneration technology, applied in chemical instruments and methods, purification using ion exchange materials, separation methods, etc., can solve the problem of high regenerant and achieve the effect of reducing productivity and permeability

Pending Publication Date: 2019-07-26
ノヴァセププロセスソリューションズ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of regenerant used is very high

Method used

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  • Purification method using a low granulometry resin
  • Purification method using a low granulometry resin
  • Purification method using a low granulometry resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0163] In this example, a loading of 100 BV (or resin bed volume equivalent) consisting of syrup with 60% dry matter and 545 ICUMSA unit color was used. The resin used was a strong anionic resin in the chloride form (FPA90RF Cl from The Dow Chemical Company).

[0164] In test N°1, a raw resin with a porosity between 500 and 800 μm was contacted with syrup in a 400 mL beaker, thermostated at 60° C. and stirred with a magnetic stirring bar.

[0165] In test N° 2, the resin was preground to a particle size of 100 to 500 μm. The contacting with the syrup was carried out in the same manner as in Test N°1.

[0166] In test N°3, the resin was preground to a particle size of 80 to 100 μm. The contacting with the syrup was carried out in the same manner as in Test N°1.

[0167] In test N°4, the resin was preground to a particle size of 35 to 80 μm. The contacting with the syrup was carried out in the same manner as in Test N°1.

[0168] The evolution of syrup color was measured by...

Embodiment 2

[0171] In this example, a load of 300 BV, larger than in Example 1, consisting of syrup with 60% dry matter and 545 ICUMSA units of color was used. The resin used was FPA90RF Cl resin as in Example 1.

[0172] In test N°1, a raw resin with a porosity between 500 and 800 μm was contacted with syrup in a 400 mL beaker, thermostated at 60° C. and stirred with a magnetic stirring bar.

[0173] In test N°2, the resin was preground to a particle size of 80 to 100 μm. The contacting with the syrup was carried out in the same manner as in Test N°1.

[0174] In test N°3, the resin was preground to a particle size of 35 to 80 μm. The contacting with the syrup was carried out in the same manner as in Test N°1.

[0175] The evolution of syrup color was measured by taking samples over time. result in Figure 10 Given in , as indicated by the box text, each curve corresponds to one of the above trials.

[0176] According to these results, approximately 50% decolorization of a 300 BV l...

Embodiment 3

[0180] In this example, experiments were performed on a chromatographic column.

[0181] Using a column with a diameter of 1 cm and a height of 4 cm, the resin volume is 3.14 mL. The adsorption step (test N°1) was carried out by passing a volume of 180 BV of colored syrup through a bed of resin. The resin used was that of Example 1, ground to a particle size of 80 to 100 μm.

[0182] Measure the color of the decolorized syrup at the outlet of the column. result in Figure 11 Given in , the curve N°1 of the solid line represents the instantaneous decolorization rate, and the curve N°1 of the dashed line represents the average decolorization rate.

[0183] After the adsorption step, a washing step is performed by passing 2Bv volumes of water; then a regeneration step is performed by passing 1.8BV volumes of regeneration solution (10% NaCl + 1% NaOH); then 5BV demineralized water Rinse step. Each step lasts 40 to 90 minutes.

[0184] Another adsorption (test N° 2) was carri...

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Abstract

The invention relates to a method for purifying a solution, the method comprising the following successive steps: bringing a solution to be purified into contact with an ion exchange resin by suspending the ion exchange resin in the solution to be purified, the ion exchange resin having the form of particles having a size Dv50 smaller than or equal to 200 [mu]m; separating the solution into a purified solution and a loaded resin; regenerating the loaded resin by passing at least one regenerating solution through a compact bed of loaded resin. The invention also relates to an assembly for implementing said method.

Description

technical field [0001] The present invention relates to a method of purifying a solution, in particular to a method of decolorizing syrup by using an ion exchange resin with a small particle size. Background technique [0002] The sugar industry produces sugar juice, or syrup, which contains impurities, especially coloring agents. Therefore, the syrup must be purified, especially decoloured. [0003] A common decolorization method is to pass the syrup through a chromatographic system filled with ion exchange resins. The resin used generally has an average particle size of about 700 μm and allows to obtain a decolorization level of about 65%, corresponding to a color fixed at 15 to 18×10 per liter of resin at a permeation rate of about 10 m / h. 6 between ICUMSA units. [0004] Smaller particle size resins are commercially available, such as Purolite's PRA420 resin. Such resins are generally sensitive and expensive and are used to decolorize liquids with little color (betwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J47/10B01D15/02C13B20/14B01J49/05
CPCB01D15/203B01D15/361B01J47/10C13B20/14B01D15/1885B01J49/05B01D15/363C02F1/44B01J49/60
Inventor 埃里克·瓦莱里塞德里克·普里厄
Owner ノヴァセププロセスソリューションズ
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