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A kind of porous monolith, its preparation method and application

A selective and solvent-based technology, applied in the field of separation, can solve the problems of low efficiency and low selectivity of adsorbents, and achieve the effects of short reaction time, improved internal 3D structure, and low density

Active Publication Date: 2021-06-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a porous monolith and its preparation method and application, with organic polymers as the main raw material and metal-organic framework (MOFs) crystal grains as modified bodies to solve the existing problems. In the technology, the adsorbent has problems such as low selectivity and low efficiency in the process of oil-water separation

Method used

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Embodiment 1

[0051] This embodiment provides a porous monolith and its preparation method, the preparation method comprising the following steps:

[0052] (1) The polymer is dissolved in a solvent to obtain the first slurry; wherein, the polymer is polycarbonate (the degree of polymerization is 40000); the solvent is dioxane; the solid of the polymer and the solvent Liquid ratio g / mL is 0.07

[0053] (2) Add the aqueous solution of MOFs to the first slurry obtained in step (1), and obtain the second slurry after the reaction; wherein, the MOFs are ZIF-67; the particle size of the MOFs is 0.8 μm; the aqueous solution of the MOFs Prepared by ultrasound; the time of the ultrasound is 5min; the quality of MOFs in the aqueous solution is 1% of the polymer mass in step (1); the volume of the aqueous solution is 7.5% of the solvent volume in step (1). %; The temperature of the reaction is 40°C; The time of the reaction is 0.5h;

[0054] (3) The second slurry obtained in step (2) is sequentially...

Embodiment 2

[0057] This embodiment provides a porous monolith and its preparation method, the preparation method comprising the following steps:

[0058] (1) The polymer is dissolved in a solvent to obtain the first slurry; wherein, the polymer is polycarbonate and polylactic acid (the degree of polymerization of polycarbonate is 40000, the degree of polymerization of polylactic acid is 40000, polycarbonate The mass ratio with polylactic acid is 1:1); The solvent is dioxane; The solid-liquid ratio g / mL of the polymer and solvent is 0.07

[0059] (2) The aqueous solution of MOFs is added in the first slurry that step (1) obtains, obtains the second slurry after reaction; Wherein, described MOFs is ZIF-67 and MIL-101 (the mass ratio of ZIF-67 and MIL-101 is 1:1); the particle size of the MOFs is 0.2 μm; the aqueous solution of the MOFs is prepared by ultrasound; the time of the ultrasound is 5min; the quality of the MOFs in the aqueous solution is the polymer quality in step (1) 2% of 2%; ...

Embodiment 3

[0063] This embodiment provides a porous monolith and its preparation method, the preparation method comprising the following steps:

[0064] (1) The polymer is dissolved in a solvent to obtain the first slurry; wherein, the polymer includes polycarbonate, polylactic acid and polystyrene (the degree of polymerization of polycarbonate is 40000, and the degree of polymerization of polylactic acid is 40000 , the degree of polymerization of polystyrene is 40000, and the mass ratio of polycarbonate, polylactic acid and polystyrene is 1:1:1); Described solvent is dioxane; The solid-liquid ratio of described polymkeric substance and solvent g / mL is 0.07

[0065] (2) Add the aqueous solution of MOFs to the first slurry obtained in step (1), and obtain the second slurry after the reaction; wherein, the MOFs include ZIF-67, MIL-101 and Uio-66 (ZIF-67, MIL- 101 and Uio-66 mass ratio is 2:1:1); The particle size of described MOFs is 1.5 μ m; The aqueous solution of described MOFs is prep...

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Abstract

The present invention relates to a porous monolith and its preparation method and application. The preparation method comprises the following steps: (1) dissolving a polymer in a solvent to obtain a first slurry; (2) adding an aqueous solution of MOFs to step (1) Among the obtained first slurry, the second slurry is obtained after the reaction; (3) The second slurry obtained in step (2) is sequentially subjected to thermal phase separation, solvent replacement and drying to obtain the porous monolith. The porous monolith provided by the invention has simple raw materials and low cost, uses organic polymers as the main raw material, and uses metal-organic framework grains as modified bodies to solve the problem of low selectivity and low efficiency of adsorbents in the oil-water separation process in the prior art. Low and so on.

Description

technical field [0001] The invention relates to the field of separation, in particular to a porous monolith and its preparation method and application. Background technique [0002] In recent years, with the vigorous development of the petroleum industry and related industries, petroleum transportation and the treatment of industrial oily wastewater are necessary processes for social development. However, oil spills and the discharge of industrial oily wastewater have led to the deterioration of the quality of rivers, lakes, and sea water, seriously damaging the living environment of animals and human health, and have become a global problem that needs to be solved urgently. Oil-water separation technology is bound to become an important topic to protect the environment and reduce economic losses. Therefore, efficient adsorption of crude oil from oil spills from the ocean and selective adsorption of oil slicks from industrial oily wastewater can improve the ecological water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/40B01D17/022C02F101/32
CPCB01D17/0202B01J20/226B01J20/261B01J20/262B01J2220/4812C02F1/285C02F1/40C02F2101/32
Inventor 陈运法王延华仉小猛闫敬民杜英超叶树峰魏连启
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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