Method for preparing polystyrol cation exchange resin
A technology of cation exchange and polystyrene particles, which is applied in the direction of cation exchange materials, etc., can solve the problems such as easy agglomeration of nanoparticles, and achieve the effect of broad application prospects, simple device and uniform particles
Inactive Publication Date: 2008-11-19
SUZHOU INST OF TRADE & COMMERCE
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[0009] The purpose of the invention is to provide a preparation method of polystyrene cation exchange resin, to prepare nano-scale polystyrene resin particles with a particle diameter less than 100nm, and to overcome the difficulty in the drying process of separation and extraction of nanoparticles in the prior art. The difficulty of agglomeration, separation and extraction of nano-sized polystyrene resin particles, and ultrafine cation exchange resin particles with a particle size of less than 2 μm
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Embodiment 1
[0032] Embodiment one: see attached figure 1 To attach Figure 4 as shown,
[0033] 1. The polymerization process of the O / W type styrene microemulsion system is as follows:
[0034] (1) The monomer styrene is treated with 8% NaOH before feeding, in order to remove the polymerization inhibitor (p-tert-butylcatechol) in the monomer.
[0035] (2) Add water to the constant temperature water bath, heat up to 65°C, add emulsifier polyethylene glycol octyl phenyl ether (TX-100) accounting for 2.43% of the total mass of the reaction system and 0.19% of the total mass of the reaction system according to the formula Co-emulsifier sodium dodecylbenzenesulfonate (DBS) and deionized water accounting for 54.24% of the total mass of the reaction system, and adding monomer styrene and 1.75% of the crosslinking agent ethylene accounting for 41.1% of the total mass of the reaction system Base benzene, then add 0.3% initiator K 2 S 2 o 8 cause. The reaction temperature is controlled at 6...
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The invention discloses a method for preparing polystyrene cation exchange resin. The method comprises the following steps of: (1) performing a micro-emulsion polymerization by using styrene as a monomer, vinyl benzene as a cross linker and potassium persulphate as an initiator to produce polystyrene micro-emulsion; (2) adding 1 portion of sulphuric acid with a mass fraction of 8 percent into the polystyrene micro-emulsion by volume portion which takes the volume of the polystyrene micro-emulsion acquired in step (1) as 1 portion, adding 2 portions of absolute ethyl alcohol into the polystyrene micro-emulsion after the mixed solution keeps stand, continuously keeping stand until supernatant liquor appears, removing the supernatant liquor, and washing polystyrene broken emulsion with distilled water for at least once; (3) filtering the polystyrene broken emulsion in vacuum to produce polystyrene particles, drying the polystyrene particles at a temperature of between 80 and 90 DEG C in vacuum, and producing the polystyrene cation exchange resin through a sulfonation reaction. The method has the advantages of simple reaction device and low raw material cost; moreover, the particle diameter of the produced sulfonated polystyrene cation exchange resin is distributed narrowly and is smaller than 2 mu m. The method has wide application prospect.
Description
technical field [0001] The invention relates to the field of organic polymer synthesis, in particular to a preparation method of polystyrene cation exchange resin. Background technique [0002] Polystyrene ion exchange resin is one of the commonly used ion exchange resins. It can not only be widely used in ion exchange, but also can be used as a solid acid catalyst in various organic synthesis reactions. [0003] The early polystyrene resin was synthesized by bulk polymerization or suspension polymerization, and the particle diameter was large, generally between 0.2 and 1.2 mm. The porous network structure inside the particle was easily blocked by pollution and failed in practical applications, thus The ion exchange adsorption process cannot be carried out. [0004] When the particle size of the exchange resin reaches the nanometer level, its specific surface area is large, and at the same time the exchange capacity is high and the speed is fast. There is no need to form a ...
Claims
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Login to View More IPC IPC(8): C08F212/08C08F2/32C08F8/36B01J39/20
Inventor 徐超武
Owner SUZHOU INST OF TRADE & COMMERCE