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Magnetic-particle in-situ separation device for magnetic stabilization fluidized bed

A technology of in-situ separation and magnetic particles, applied in the direction of magnetic separation, solid separation, chemical instruments and methods, etc., can solve the problems of increasing energy consumption of magnetic field fluidized bed, uneven distribution of fluid, loss of separation medium, etc., to achieve repeatable Use, improve operating efficiency, and reduce disturbance effects

Inactive Publication Date: 2011-07-13
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of material science, the magnetic particles used are all nano-scale or micron-scale particles with large surface area, which makes it easy for magnetic particles to escape from the magnetic field fluidized bed.
Magnetically stabilized fluidized beds generally use electromagnetic coils to generate magnetic fields. In the practical application of magnetically stabilized fluidized beds, there are the following problems: a small amount of fine magnetic particle carrier / catalyst is entrained by liquid from the outlet of the reactor and flows out, resulting in separation medium loss; in order to prevent loss, the magnetic field strength is usually increased by increasing the voltage and current of the external electromagnetic coil. In the freezing zone, the magnetic adsorption carrier is in a chain shape, channeling occurs in the bed, and the fluid distribution is uneven, resulting in a decrease in mass transfer efficiency

Method used

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  • Magnetic-particle in-situ separation device for magnetic stabilization fluidized bed
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  • Magnetic-particle in-situ separation device for magnetic stabilization fluidized bed

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Experimental program
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Embodiment 1

[0037] The magnetic particle 23 of the present embodiment is the Cu that grafts glycidyl methacrylate and iminodiacetic acid on the surface of magnetic polyvinyl acetate microspheres. 2+ Chelated affinity adsorption magnetic microspheres (PVA-g-GMA-IDA-Cu 2+ ), the experiment proves that the magnetic microsphere has superparamagnetism.

[0038] Magnetic microspheres (PVA-g-GMA-IDA-Cu 2+ ) adsorption reaction of laccase protein, normal temperature 25 ℃, magnetic microspheres (PVA-g-GMA-IDA-Cu 2+ ) as an adsorption carrier, magnetic microsphere concentration 100mg / ml in the magnetically stable fluidized bed 9, liquid feed port 11 protein concentration 0.1mg / ml, carry out magnetic microsphere (PVA-g-GMA-IDA-Cu 2+ ) continuous in-situ separation operation, during the adsorption process, samples were taken regularly at the discharge port 14, and the outflow of magnetic particles 23 was measured by centrifugation, and no obvious outflow of magnetic microspheres was seen.

Embodiment 2

[0040] The magnetic particle 23 of this embodiment is an active Ni catalyst, and experiments have proved that the magnetic microsphere has superparamagnetism.

[0041] Carry out the reaction of caprolactam catalytic hydrogenation in the device of the present invention, reaction temperature 80 ℃, magnetic active Ni is used as catalyst, catalyst concentration 20% (w / v) in the magnetically stable fluidized bed 9, liquid feed inlet 11 contains dissolved hydrogen Caprolactam aqueous solution concentration 32% (w / v), carry out the continuous in-situ separation operation of active Ni in the magnetically stable fluidized bed 9 according to the above-mentioned method, in the adsorption process, regularly sample at discharge port 14, centrifuge and measure the outflow situation of active Ni , no obvious active Ni outflow.

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Abstract

The invention provides a magnetic-particle in-situ separation device for a magnetic stabilization fluidized bed, which comprises a magnetic stabilization fluidized bed and is characterized by also comprising a permanent magnet in-situ separation system positioned inside the magnetic stabilization fluidized bed, wherein the in-situ separation system comprises an isolation cylinder provided with a sealing bottom, the center of the isolation cylinder is provided with a discharging hole, and the isolation cylinder is nested and fixed on an upper port of a sleeve; two coaxially arranged annular permanent magnets are placed in the isolation cylinder; the two annular permanent magnets are respectively fixed on the bottom ends of crank connecting links of two crank-link mechanisms through fixed shaft sleeves, the upper ends of the crank connecting links are connected with disks rotating around a shaft, and the two disks are driven synchronously and reversely by a motor to carry out up and down periodical reciprocating motion in a reverse direction; and a tapered reducing hopper is arranged under the isolation cylinder, an arc-shaped baffle plate is arranged at the undermost of the tapered reducing hopper, and the arc-shaped baffle plate is connected with a guide pipe at the tail end of the tapered reducing hopper through a connecting rod.

Description

technical field [0001] The invention relates to a magnetic particle separation device, in particular to a magnetic particle in-situ separation device for a magnetically stable fluidized bed. Background technique [0002] Due to their large surface area and high surface activity, superparamagnetic nano / micro particles are thermodynamically unstable and easily agglomerated into clusters. In order to prevent the coagulation between the magnetic particles and form a stable colloidal solution, the surface of the magnetic particles needs to be modified during the preparation process. The surface of the modified magnetic particles should have more active functional groups, such as -NH2 , -COOH, -OH and -CHO, etc., in order to couple biomolecules and affinity ligands to obtain suitable magnetic carriers for various applications. The magnetic particles contain magnetic particles inside, which have superparamagnetism. When there is an external magnetic field, they show better magneti...

Claims

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Application Information

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IPC IPC(8): B03C1/02B01J8/24
Inventor 刘春朝王锋郭晨安震涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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