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Preparation method of macroporous weakly acidic cation exchange resin

A technology of cation exchange and macroporous resin, which is applied in the field of polymer chemistry and can solve the problems of poor product appearance and small exchange capacity

Active Publication Date: 2014-04-02
WUXI JIMIN KEXIN SHANHE PHARMA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned method has some disadvantages, such as adopting polymethyl acrylate as the exchange capacity of the weakly acidic cation exchange resin prepared by the main material below 11mmol / g, and the exchange capacity is small; and adopting acrylonitrile as the exchange capacity of the weakly acidic cation exchange resin prepared by the main material It can reach more than 11mmol / g, but the appearance of the product is poor, it is light yellow or yellow balls

Method used

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  • Preparation method of macroporous weakly acidic cation exchange resin
  • Preparation method of macroporous weakly acidic cation exchange resin

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Step 1, take vinylphenol 50g, styrene 30g, acrylonitrile 500g, methyl acrylate 300g, triallyl isocyanurate 80g by weight as monomers; get 336g of toluene as porogen, and take another 2.88g of benzoyl peroxide and 4.8g of azobisisobutyronitrile were used as initiators and mixed to prepare phase A.

[0030] Step 2, take saturated sodium chloride solution as phase B.

[0031] Step 3, put phase A into phase B, the ratio is 1:0.5, start stirring, the stirring speed is 100 rpm, stir for 0.5 hours, heat up to 70°C to react, continue to react for 8 hours, heat up to boiling and reflux, and continue to react After 8 hours, cool and filter to obtain resin microspheres.

[0032] In step 4, the resin microspheres are washed with deionized water until the lotion is clear and transparent, and then washed with hot ethanol until there is no toluene smell to obtain a semi-finished macroporous resin.

[0033] Step 5, take the macroporous resin semi-finished product, add 25% sodium hydr...

Embodiment 2

[0036] Step 1, take vinylphenol 80g, styrene 50g, acrylonitrile 300g, methyl acrylate 350g, triallyl isocyanurate 80g by weight as monomers; get 344g of toluene as porogen, and take another 4.3 g of benzoyl peroxide and 4.3 g of azobisisobutyronitrile were used as initiators and mixed to prepare Phase A.

[0037] Step 2, take saturated sodium chloride solution as phase B.

[0038] Step 3, put phase A into phase B, the ratio is 1:0.8, start stirring, the stirring speed is 120 rpm, stir for 1 hour, heat up to 80°C to react, continue to react for 10 hours, heat up to boiling and reflux, and continue to react After 10 hours, cool and filter to obtain resin microspheres.

[0039] In step 4, the resin microspheres are washed with deionized water until the lotion is clear and transparent, and then washed with hot ethanol until there is no toluene smell to obtain a semi-finished macroporous resin.

[0040] Step 5, take the macroporous resin semi-finished product, add 30% sodium hydr...

Embodiment 3

[0043] Step 1, take vinylphenol 100g, styrene 50g, acrylonitrile 500g, methyl acrylate 400g, triallyl isocyanurate 70g by weight as monomers; get 336g of toluene as porogen, and take another Azobisisobutyronitrile with a monomer weight of 5.6 g was used as an initiator, and phase A was prepared by mixing.

[0044] Step 2, take saturated sodium chloride solution as phase B.

[0045] Step 3, put phase A into phase B, start stirring, the stirring speed is 150 rpm, stir for 1 hour, heat up to 65°C to react, continue to react for 9 hours, heat up to boiling and reflux, continue to react for 10 hours, cool and filter to obtain resin Microspheres.

[0046] In step 4, the resin microspheres are washed with deionized water until the lotion is clear and transparent, and then washed with hot ethanol until there is no toluene smell to obtain a semi-finished macroporous resin.

[0047] Step 5, take the macroporous resin semi-finished product, add 20% sodium hydroxide solution twice its w...

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Abstract

A preparation method of macroporous weakly acidic cation exchange resin comprises the following steps: weighting vinylphenol, styrene, acrylonitrile, methyl acrylate, and triallyl isocyanurate monomers according to a certain weight proportion; weighting toluene as a pore forming agent according to a certain weight percentage of the monomers, weighting benzoyl peroxide and azodiisobutyronitrile as initiators according to a certain weight percentage of the monomers, and mixing the above components to form an A phase; taking saturated sodium chloride solution as a B phase; adding the A phase into the B phase, and stirring the mixture for a certain time at a certain speed, heating to a certain temperature and continuously reacting for a certain time; heating the mixture to boil and reflow, continuously reacting for a certain time, cooling and filtering; washing the reaction product by deionized water until the washing water is clear and transparent, and then washing by hot ethanol until no toluene flavor; adding a certain amount of sodium hydroxide solution in a certain concentration, stirring and performing hydrolysis for a certain time at a certain temperature; cooling and filtering, and washing by deionized water until the washing water is clear and transparent, so as to obtain the macroporous weakly acidic cation exchange resin (sodium type).

Description

Technical field: [0001] The invention belongs to the technical field of polymer chemistry, and in particular relates to a preparation method of a macroporous weakly acidic cation exchange resin. Background technique: [0002] Macroporous weakly acidic cation exchange resins are mainly used in the water treatment industry. There are two main production processes at present. One is to obtain macroporous weakly acidic cation exchange resins by hydrolysis of polymerized white balls prepared from polymethyl acrylate as the main material; The other is to use acrylonitrile as the main material to prepare polymeric white spheres to obtain macroporous weakly acidic cation exchange resins through hydrolysis. [0003] "Journal of Henan University (Medical Science Edition)" No. 03, 2003 discloses a preparation method of a macroporous weakly acidic cation exchange resin, using methacrylic acid (MAA) as a raw material and divinylbenzene (DVB) as a crosslinking agent. The weakly acidic ca...

Claims

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Application Information

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IPC IPC(8): C08F220/44C08F212/14C08F212/08C08F220/14C08F226/06C08F8/12C08J9/28B01J39/20
Inventor 吴凌云
Owner WUXI JIMIN KEXIN SHANHE PHARMA
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