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Method for preparing dedicated molecular sieve used for separating levulose from glucose by simulating moving bed

A technology for simulating moving bed and molecular sieve, which is applied in chemical instruments and methods, sugar production and application, etc. It can solve the problems of high cost of adsorbent, poor separation effect, poor separation effect, etc., and achieve the stability of various indicators , high separation coefficient and long service life

Inactive Publication Date: 2009-06-03
LUOYANG TIANPING MOLECULAR SIEVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the adsorbent used in the sugar alcohol industry to separate fructose and glucose is resin, and the separation effect is not good
In recent years, the simulated moving bed separation technology for fructose and glucose has become more and more mature, but the cost of the adsorbent remains high, and the broken rate is high, and the separation effect is poor, which hinders the development of this technology, so a resin substitute is needed

Method used

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  • Method for preparing dedicated molecular sieve used for separating levulose from glucose by simulating moving bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] First make a seed ball of about 0.2mm, then shape it, shape the particle size to about 0.4mm, polish it for 15 minutes, add about 15% surface coating at the same time of polishing, then vacuum dry at 180°C, and bake at about 400°C. Take by weighing 24 grams of molecular sieve after roasting, take by weighing 11 grams of calcium chloride, add water 350ml, dissolve with deionized water in a 1000ml beaker, exchange five times, each two hours, temperature 95 degrees. After exchange, wash with deionized water until there is no chloride ion. Then vacuum-dried, and then baked at 400 degrees for 1 hour to obtain the target product.

Embodiment 2

[0008] First make a seed ball of about 0.2mm, and then shape it. After shaping, polish it for 15 minutes, add about 15% of the surface coating at the same time of polishing, then vacuum dry at 180°C, and bake it at about 400°C. 24 grams of molecular sieves, weighed 20 grams of calcium chloride, added 500 ml of water, dissolved in deionized water in a 1000 ml beaker, and exchanged five times, each time for two hours, at a temperature of 90 degrees. After exchange, wash with deionized water until there is no chloride ion. Then vacuum-dried, and then baked at 400 degrees for 1 hour to obtain the target product.

Embodiment 3

[0010] First make a seed ball of about 0.2mm, then shape it, shape the particle size to about 0.4mm, polish it for 15 minutes, add about 15% surface coating at the same time of polishing, then vacuum dry at 180°C, and bake at about 400°C. Take by weighing 24 grams of molecular sieve after roasting, take by weighing 38 grams of calcium chloride, add water 700ml, dissolve with deionized water in a 1000ml beaker, exchange five times, each two hours, temperature 80 degrees. After exchange, wash with deionized water until there is no chloride ion. Then vacuum-dried, and then baked at 400 degrees for 1 hour to obtain the target product.

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Abstract

A method for preparing a dedicated molecular sieve which can separate levulose from glucose by simulating a moving bed adopts the manufacturing technique of formation first and then exchange, and comprises the following steps: mixing a Y type molecular sieve with an adhesive to produce a seedball which is then subjected to formation; adding an acidproof adhesive during the process of formation; polishing after formation and meanwhile adding a surface coating; parching; baking; carrying out ion exchange or direct impregnation; and subjecting sorbent after undergoing ion exchange or direct impregnation to after-baking in order to obtain sorbent with good absorption property and excellent acid resistance. The substance produced by utilizing the invention is a molecular sieve which can be easily involved in ion exchange, has the advantages of high separation coefficient, excellent acid resistance, good stability, cheapness and long service life, and is used for separating levulose from glucose by simulating the moving bed. As the molecular sieve is stable in all indexes and can achieve the separation effects as required, the molecular sieve can replace resin.

Description

technical field [0001] The invention relates to a preparation method of a molecular sieve, in particular to a preparation method of a molecular sieve specially used for separating fructose and glucose in a simulated moving bed. Background technique [0002] At present, the adsorbent used in the sugar alcohol industry to separate fructose and glucose is resin, and the separation effect is not good. In recent years, the separation technology of fructose and glucose in simulated moving bed has become more and more mature, but the cost of adsorbent remains high, and the broken rate is high, and the separation effect is poor, which hinders the development of this technology, so a resin substitute is needed. However, since the working environment of the adsorbent is in a solution of pH=4.5-5.5, it is imperative to select an adsorbent with good acid resistance. Contents of the invention [0003] In order to solve the defect in the prior art that the sugar alcohol industry uses r...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30C13K3/00
Inventor 席保平王义集权藏玉席迎建
Owner LUOYANG TIANPING MOLECULAR SIEVE
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