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Putamen pattern cellulose stainless steel powder compounded microballons and the preparation process thereof

A technology of stainless steel powder and composite microspheres, applied in other chemical processes, separation by moving adsorbents, chemical instruments and methods, etc., can solve the problem of not developing a spherical expanded bed adsorption matrix, etc. The effect of bit cleaning and simple preparation process

Inactive Publication Date: 2006-03-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Both cellulose and stainless steel powder are very readily available industrial raw materials, so far, there is no report on the combination of the two to develop a spherical expanded bed adsorption matrix

Method used

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  • Putamen pattern cellulose stainless steel powder compounded microballons and the preparation process thereof
  • Putamen pattern cellulose stainless steel powder compounded microballons and the preparation process thereof
  • Putamen pattern cellulose stainless steel powder compounded microballons and the preparation process thereof

Examples

Experimental program
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preparation example Construction

[0012] The steps of the preparation method of core-shell cellulose / stainless steel powder composite microspheres are as follows:

[0013] 1) Prepare composite water phase

[0014] Mix stainless steel powder superfine particles and industrial cellulose xanthate viscose at a mass percentage of 5%-40% at room temperature, stir evenly, heat up to 25-35°C, and continue stirring for 30-45 minutes;

[0015] 2) Suspension heating and solidification into balls

[0016] Stop stirring, add oil dispersion phase and surfactant, then start stirring, suspend and disperse at 25-35°C for 30-60 minutes, heat up to 90-95°C, keep warm for 1.5-2 hours, the viscose solidifies to obtain microspheres;

[0017] 3) Regeneration of homogeneous microspheres

[0018] The solidified microspheres are filtered out from the oil phase, washed with 1 to 2 times the volume of benzene to remove the oil layer, and then regenerated with 2 to 3 times the volume of methanol, ethanol solution containing 30% acetic a...

Embodiment 1

[0028] Add 100g industrial viscose (containing cellulose 8.2g, CS 2 3g, NaOH6.2g, viscosity is 6800 cSt) and 20g stainless steel powder, be warming up to 30 ℃ and stir for half an hour; Stop stirring, add 600mL by the mixed oil phase (pump oil: chlorobenzene=4: 1 , mass ratio), adjust the stirring speed to 650rpm, keep the speed constant, suspend and disperse at 30°C for 45 minutes, heat up to 90°C within 15 minutes, keep warm for 1.5 hours, and solidify to obtain yellow-white microspheres; the microspheres are removed from the oil phase Filter out, wash with 150mL benzene for 1 hour, regenerate with 200mL methanol for 1 hour, regenerate with 200mL ethanol solution containing 30% acetic acid for 1 hour, wash with tap water three times, and sieve in a wet state to obtain white balls with a particle size between 60 and 200 μm 42mL, density 1.2g / cm 3 .

Embodiment 2

[0030] Add 100g of the above-mentioned industrial viscose (composition is the same as Example 1) and 20g stainless steel powder in a 1-liter three-necked flask, heat up to 35°C and stir for half an hour; add 450mL of mixed oil phase prepared by pump oil and chlorobenzene (pump oil: chlorine Benzene=6:1, mass ratio) and 0.9g oleic acid, adjust the stirring speed to 600rpm, suspend and disperse for 1 hour at 35°C, heat up to 90°C within 15 minutes, keep warm for 1.5 hours, and solidify to obtain yellow-white microspheres; The balls are filtered out from the oil phase, washed with 200mL benzene for 1 hour, regenerated with 200mL methanol for 1 hour, and regenerated with 200mL 10% sulfuric acid solution for 1 hour, washed with tap water three times, and sieved in a wet state to obtain a particle size between 60 and 300 μm. 48mL of white balls with a density of 1.2g / cm 3 .

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Abstract

The invention disclosed a shell-type cellulose / stainless steel powder composite microball and its manufacturing method. Mixing superfine stainless steel powder with industrial cellulose xanthate gel, suspending the mixture in an oil phase and forming a water-in-oil suspension, pellets are formed after improving the temperature, obtaining microballs after filtering. The steps are as the follows:1) prepare a composite water phase, mix stainless steel powder with industrial cellulose xanthate gel; 2) heating and solidifying pellets, adding an oil phase and a surfactant, forming a reverse-phase suspension, pellets are formed after improving the temperature;3) regenerating and obtaining microballs, washing by an organic solvent, regenerating by an acid, and obtaining shell-type composite microballs;4) sieve and floatation by an expanding bed, sieving regenerated microballs and flotation by an expanding bed to a range of particle size. The composite microball medium is hydrophilic, could resist acids and bases. Expansion performance test shows that the microball could be a medium for expanding absorption.

Description

technical field [0001] The invention relates to a core-shell cellulose / stainless steel powder composite microsphere. Background technique [0002] Expanded Bed Adsorption (EBA) technology is a new type of protein separation and purification technology developed in the 1990s, which can directly capture the target product from the fermentation broth or cell homogenate, collect solid-liquid separation, concentration and initial Purification in one operation unit can reduce the number of operation units, shorten the operation time, and save production costs. It is known as the first new unit operation that has appeared in recent decades and has been quickly obtained in the downstream processing of bioengineering. Wide range of applications. Expanded bed is a special case of fluidized bed. Based on the stable classification behavior of adsorbent in expanded bed, its theoretical plate number is much higher than that of ordinary fluidized bed and close to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/32B01D15/02C07K1/14
Inventor 林东强姚善泾缪志俊雷引林朱自强
Owner ZHEJIANG UNIV
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