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Anion type polymer containing tetramethylguanidine cation and its preparation method and uses

A tetramethylguanidine cation and anion technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of no sulfur absorption, limited large-scale application, high synthesis cost, etc., and achieves short reaction time , high selectivity, low cost effect

Inactive Publication Date: 2006-12-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high viscosity of ionic liquids and the inherent shortcomings of wet desulfurization limit their large-scale application.
There have been reports abroad that imidazole ionic liquids have been introduced into polymer structures to obtain ionic polymers for carbon dioxide absorption (Macromolecules, 2005, 38: 2037-2039; Journal of Polymer Science: Part A: Polymer Chemistry 2005, 43: 1432 -1443), however, this polymer is a cationic polymer, the synthesis cost is high, and it can only absorb carbon dioxide, and has no absorption capacity for sulfur dioxide
Domestic literature ("Environmental Science and Technology", 1999, No. 1, 23-24 pages) reported that the cross-linked polystyrene polymer obtained after the sintering process although the porous solid desulfurizer has sulfur dioxide absorption capacity, it is not ionomers rather than ionomers, and whether it can be recycled has not been reported

Method used

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  • Anion type polymer containing tetramethylguanidine cation and its preparation method and uses
  • Anion type polymer containing tetramethylguanidine cation and its preparation method and uses
  • Anion type polymer containing tetramethylguanidine cation and its preparation method and uses

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Accurately weigh 11.58 g (0.1 mol) of 1,1,3,3-tetramethylguanidine, and add it into a three-necked round-bottomed flask equipped with a condenser tube and a mechanical stirring device. Accurately weigh 7.20 g (0.1 mol) of acrylic acid and place it in a constant pressure dropping funnel. The three-necked flask was placed in an ice-water bath (0° C.), and stirring was started, and the acrylic acid solution was added dropwise. The dropwise addition was completed within 15 minutes, and the stirring was continued at room temperature for 15 minutes to obtain 1,1,3,3-tetramethylguanidine salt of ionic vinyl monomer acrylic acid. Nitrogen was passed for 0.5 hours, the temperature of the water bath was raised to 80° C., and then a free radical initiator, potassium persulfate, was added. The mass of potassium persulfate was 0.5% of the mass of the monomer. The reaction was stirred for 2 hours to obtain (polyacrylic acid 1,1,3,3-tetramethylguanidine salt), which was designated as...

Embodiment 2

[0029] Accurately weigh 11.58 g (0.1 mol) of 1,1,3,3-tetramethylguanidine, and place it in a three-necked round-bottomed flask equipped with a condenser tube and a mechanical stirring device. Accurately weigh 8.6 grams (0.1 mol) of methacrylic acid and place it in a constant pressure dropping funnel. The three-necked flask was placed in a water bath at 30°C, and stirring was started, and methacrylic acid was added dropwise. The dropwise addition was completed within 0.5 hours, and stirring was continued at room temperature for 7.5 hours. Raise the temperature to 75° C., vacuumize for 0.5 hours, and then pass nitrogen gas for 0.5 hours, then add free radical initiator ammonium persulfate, the amount of free radical initiator is 0.05% of the monomer mass. The reaction was stirred for 8 hours to obtain (1,1,3,3-tetramethylguanidine salt of polymethacrylic acid), which was designated as polymer B. The polymer is used after pulverization. The infrared spectrum of polymethacrylic ...

Embodiment 3

[0031] Accurately weigh 11.58 g (0.1 mol) of 1,1,3,3-tetramethylguanidine, place it in a three-necked round-bottomed flask with a condenser tube and a mechanical stirring device, and add 20 mL of deionized water. Accurately weigh 5.80 g (0.05 mol) of maleic acid, place it in a constant pressure dropping funnel, and add 20 mL of deionized water. The three-necked flask was placed in a water bath at 60°C, and stirring was started, and the maleic acid solution was added dropwise, and the dropwise addition was completed in 0.5 hours, and the stirring was continued at room temperature for 4 hours. Treat with nitrogen for 0.5 hours, raise the temperature of the water bath to 60°C, and then add the redox initiator system ammonium persulfate-sodium bisulfite, the amount of ammonium persulfate is 0.5% of the monomer mass, the mole of ammonium persulfate and sodium bisulfite The ratio is 1:3. The reaction was stirred for 8 hours, and evaporated at 120 Pa and 100° C. for 12 hours to obta...

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Abstract

The invention discloses a cross-linked anion polymer containing tetramethylguanidine cation and it's preparing method and usage. The anion in anionic construction unit is carboxylate anion, contra-ion is 1, 1, 3, and 3- tetramethylguanidine cation (tetramethylguanidine cation for abbreviation). The polymer is prepared through polymerization of ionic vinyl monomer which is got through neutralization of vinyl monomer containing carboxy group with 1, 1, 3, and 3- tetramethylguanidine (tetramethylguanidine for abbreviation). Said polymer is porous particle, and can be used as desulfurizer to absorb sulfur dioxide, the absorption is characterized by high selectivity, large absorption capacity and rapid speed; said polymer can be reused for several times. The method is characterized by simple process, soft condition, short reacting time and high productivity.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to an anionic polymer containing tetramethylguanidine cations, a preparation method and application. Background technique [0002] Ionic polymer refers to a linear or cross-linked polymer containing anion or cation and its counterion (cation or anion) on the side chain or end group of the polymer. Ionic polymers are divided into anionic polymers and cationic polymers according to the difference in the ionic groups directly connected to the polymer backbone. The ionic groups directly connected to the polymer backbone are anionic, called anionic polymers, and their counter ions are cationic; the ionic groups directly connected to the polymer backbone are cationic, called cationic polymers , whose counterion is an anion. According to the content and application of ionic groups, ionic polymers can be divided into ionomers (or ionomers), polyelectrolytes, superabsorbents, ionic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/34B01D53/14
Inventor 吴林波李伯耿安东朱世平
Owner ZHEJIANG UNIV
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