Supported polypropylene imine material and preparation method and application thereof

A polypropylene imine and application technology, applied in the field of supported polypropylene imine material and its preparation, can solve the problems of limiting practical application and high synthesis cost, and achieve the advantages of large-scale production, high selectivity and large adsorption capacity Effect

Inactive Publication Date: 2011-05-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost of synthesis of ionic liquids limits their practical applications.

Method used

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  • Supported polypropylene imine material and preparation method and application thereof
  • Supported polypropylene imine material and preparation method and application thereof
  • Supported polypropylene imine material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Polypropylene imine synthesis

[0027] EDA-dendr-(NH 2 ) 4 The synthesis is as follows:

[0028] Add 60g (1mol) of ethylenediamine and 120g of distilled water to a 500ml three-neck flask equipped with a reflux condenser, a thermometer, a constant pressure dropping funnel and a magnetic stirrer. The temperature of the reaction system was raised to 25° C., and 265 g (5 mol) of acrylonitrile was slowly added dropwise within two hours using a constant pressure dropping funnel, and the temperature was raised to 40° C. for 1 hour to react. Then, slowly raise the temperature to 80°C, azeotropically reflux, and react for 20 hours. Finally, after cooling down to room temperature, water and excess acrylonitrile were removed by rotary evaporation, and the remaining crude product was a yellow viscous liquid. The above crude product was dissolved in 3×800ml of hot ethanol, recrystallized to obtain white flaky crystals, and dried in vacuum at 40°C for 5 hours to obtain an...

Embodiment 2-6

[0032] Take 5g EDA-dendr-(NH 2 ) 4 , dissolved in 80 ml absolute ethanol. Add 10 g of porous silica gel to the above solution, stir for 1 hour to fully impregnate; slowly evaporate the solvent at 50° C., and continue vacuum drying at 80° C. for 48 hours to obtain a white powder product. The resulting product is denoted as (P)EDA-dendr-(NH 2 ) 4 / SiO 2 (0.5 / 1). Among them, P represents the physical load by impregnation method, EDA-dendr-(NH 2 ) 4 and SiO 2 respectively represent the corresponding polypropylene imine and porous carrier material, 0.5 / 1 represents EDA-dendr-(NH 2 ) 4 with SiO 2 The mass ratio of the two.

[0033] Similarly, other polypropyleneimine supported materials were prepared, see Table 1.

[0034] Table 1 Load conditions of Examples 2-6

[0035] Example

Embodiment 7

[0037] Into a dry 250ml four-necked flask equipped with a thermometer, a constant pressure dropping funnel, a magnetic stirrer and a nitrogen conduit, add 28.8g of porous silica gel powder, 100mL of anhydrous toluene, nitrogen protection, raise the temperature to 80°C, and drop Slowly add 0.1mol γ-glycidyloxypropyltrimethoxysilane dropwise to the liquid funnel within 1 hour, and react for 8 hours. The reaction mixture was cooled to room temperature, and solvents such as toluene were removed by rotary evaporation to obtain a powdery product. Vacuum drying at 80°C for 48 hours to obtain glycidyl-containing silica gel powder.

[0038] Add 0.1mol EDA-dendr-(NH 2 ) 4 , 100mL absolute ethanol, under nitrogen protection, then add the above-mentioned pretreated porous silica gel powder, and react at room temperature for 4h. Solvents such as ethanol were removed by rotary evaporation to obtain a powdery product. Vacuum drying at 80°C for 48 hours gave the final product as a white p...

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Abstract

The invention discloses a supported polypropylene imine material and a preparation method and application thereof. The material is formed by supporting polypropylene imine in a porous carrier material, wherein the mass ratio of the polypropylene imine to the porous carrier material is 0.1-2:1. The polypropylene imine one or random mixture of first generation, second generation or third generationpolypropylene imines taking ethylene dimine, butyl diamine, hexanediamine or diethylenetriamine as a core. The polypropylene imine is supported on the porous carrier material such as porous silica gel, active alumina, silicon-based ordered mesoporous material SBA-15, MCM-41 or active carbon or the like by a physical dipping-solvent evaporation method or a chemical method; and the material can be used as an adsorbent for catching and separating acid gas such as CO2, SO2 or H2S or the like from a gas mixture. The adsorbent has the advantages of quick and efficient adsorption, high adsorption capacity, high selectivity, recycle and the like.

Description

technical field [0001] The invention belongs to the field of chemical materials and gas separation, and in particular relates to a loaded polypropyleneimine material and its preparation method and application. Background technique [0002] With the rise of human industrial civilization, the discharge of acid gas has caused many environmental problems, which have affected all aspects of human production and life, and have increasingly attracted people's attention. The mining and extensive utilization of petrochemical raw materials, the combustion of coal in the process of thermal power generation, the emission of exhaust gas from urban vehicles, and the incineration of wheat straw in rural areas, the resulting CO emissions 2 , SO 2 、H 2 S and other acid gases corrode the environment and endanger our lives and human health. Due to CO 2 The global warming caused by the massive emission of major greenhouse gases such as GHG has triggered a series of major problems such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02C01B31/20C01B17/56C01B17/16C01B32/50
CPCY02C10/08Y02C20/40Y02P20/151
Inventor 吴林波任杰李伯耿
Owner ZHEJIANG UNIV
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