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A kind of aminated high specific surface area polystyrene resin and its preparation method and application

A technology of polystyrene resin and styrene resin, which is applied in the field of cigarette harm reduction additive materials, can solve the problems of decreased specific surface of resin, difficult to carry out functionalization reaction, etc., and achieves the effects of improving efficiency, good adsorption effect, and efficient removal.

Active Publication Date: 2018-05-04
NANTONG CELLULOSE FIBERS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the special pore-forming mechanism of this type of resin, its pore structure is relatively dense, and the pore size is limited by the size of chloromethyl ether or dangling double bonds, and the pore size is concentrated in the micropore distribution ([9] ChuncaiZhou, Jun Yan, Zhinong Cao, Journal ofApplied Polymer Science, 2002,83:1668-1677), which makes the follow-up functional group reaction difficult to carry out, although there are also bibliographical reports ([10 ] Liu Rui, Wu Chunmi, Wang Chunhong, etc., Acta Polymer Sinica, 2008, 7: 679-685), but compared with ultra-high cross-linked polystyrene resin, the specific surface area of ​​functionalized resin is still greatly reduced, generally less than 900m 2 / g

Method used

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  • A kind of aminated high specific surface area polystyrene resin and its preparation method and application

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preparation example Construction

[0037] The preparation method of above-mentioned aminated high specific surface area polystyrene resin comprises the steps:

[0038] Step 1, prepare polystyrene resin (also known as white ball);

[0039] Step 2, preparing ultra-high cross-linked polystyrene resin;

[0040] Step 3, preparing chloromethylated ultra-high cross-linked polystyrene resin (also known as chlorine ball);

[0041] Step 4, preparing aminated high specific surface area polystyrene resin.

[0042] Wherein, the above step one includes:

[0043] (1a) a step of preparing an aqueous phase;

[0044] The polyvinyl alcohol is dissolved in water to form a suspension polymerized water phase, so that the concentration of the polyvinyl alcohol in the water phase reaches 0.5-2 wt%, and then the water phase is placed in a three-necked flask and heated to 30-50°C.

[0045] In this step, the purpose of heating the water phase is to promote the dissolution of polyvinyl alcohol in water.

[0046] (1b) the step of prep...

Embodiment 1

[0069] (1) Preparation of polystyrene resin (white ball):

[0070] Dissolve 15 g of polyvinyl alcohol in 1500 g of water in a three-necked flask with a capacity of 3 L (that is, the concentration of polyvinyl alcohol is 1 wt %) to obtain a suspension-polymerized water phase, which is heated to 40° C.

[0071] In addition, after mixing 99g of divinylbenzene (DVB, purity 55.3wt%), 198g of toluene, and 0.495g of azobisisobutyronitrile (AIBN), they were added to the above-mentioned three-necked flask to obtain the oil phase of suspension polymerization (i.e., toluene The mass ratio with DVB is 2:1, and AIBN accounts for 0.5% of divinylbenzene mass).

[0072] Add the suspension polymerized oil phase to the above water phase at a mass ratio of 1:5, start stirring, and at the same time raise the temperature of the reaction system to 76°C for 4 hours, then raise the temperature to 85°C, stop the reaction after 4 hours, and filter to obtain Spherical resin particles, washed and dried ...

Embodiment 2

[0081] (1) Preparation of polystyrene resin:

[0082] In a three-necked flask with a capacity of 3 L, 6.9 g of polyvinyl alcohol was dissolved in 1350 g of water (the concentration of polyvinyl alcohol was 0.5 wt %) to obtain a suspension polymerized water phase, which was heated to 35° C.

[0083] In addition, after mixing 112.5g divinylbenzene (DVB, purity 65.6wt%), 337.5g toluene, and 1.125g azobisisobutyronitrile (AIBN), they were added to the above-mentioned three-necked flask to obtain the oil phase of suspension polymerization ( That is, the mass ratio of toluene and DVB is 3:1, and AIBN accounts for 1% of the monomer mass);

[0084] Add the suspension polymerized oil phase to the above water phase at a mass ratio of 1:3, start stirring, and at the same time raise the temperature of the reaction system to 78°C for 2 hours, then raise the temperature to 90°C, and stop the reaction after 6 hours of reaction, filter and wash and dry to obtain polystyrene resin.

[0085] ...

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Abstract

The invention relates to an aminated high specific surface area polystyrene resin and its preparation method and application. The preparation method comprises: (1) preparing polystyrene resin; (2) using polystyrene resin and dichloroxylyl Methane prepares ultra-high cross-linked polystyrene resin; (3) prepares chloromethylated ultra-high cross-linked polystyrene resin; (4) prepares aminated high specific surface area polystyrene resin; the present invention selects dichloroxylene Methyl methane is used as a cross-linking agent to prepare ultra-high cross-linked polystyrene resin. Due to its relatively loose pore structure and large pore size, it can provide sufficient reaction space for the subsequent amination reaction, thereby greatly improving the amination reaction. Efficiency, finally improving the specific surface area of ​​aminated high specific surface area polystyrene resin, while ensuring the efficient removal of HCN and aldehydes, it also improves the removal efficiency of phenols.

Description

technical field [0001] The invention belongs to the field of additive materials for reducing harm to cigarettes, and relates to an adsorption resin, a preparation method and application thereof. Background technique [0002] The process of cigarette smoking is an incomplete combustion process with high temperature and lack of oxygen. Combustion leads to multiple reactions such as distillation, dry distillation, pyrolysis, and synthesis to occur simultaneously, forming a large number of nascent compounds. According to reports, there are more than 4,000 chemical components in cigarette smoke alone, which is more than 1,000 types in tobacco leaves. These chemical components include substances that provide tobacco aroma, substances that produce miscellaneous gas, irritation and bad taste, and even trace amounts of substances that are harmful to human health. There have been more than 100 reported harmful components of cigarette smoke, but quite a few of them are still under de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/36C08F8/32C08F8/24C08F8/02A24D3/14
Inventor 王林富宋晓梅曹建华彭为骏张杰
Owner NANTONG CELLULOSE FIBERS CO LTD
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