A kind of asphalt porous material and its preparation method and application

A technology of porous materials and asphalt, applied in the field of asphalt, can solve the problems of low specific surface area, poor safety performance and large average pore size of hard carbon materials, and achieve good gas adsorption and storage performance, good dye adsorption performance, and mild production conditions. Effect

Active Publication Date: 2018-06-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] It can be seen from the above patents and documents that using mesophase pitch as a carbon source and silica or silica gel as a template requires hydrofluoric acid to remove the template. The operation is more complicated and the pollution is serious; The specific surface area of ​​the material is low, and the average pore size is large; the process of preparing porous carbon by heating with coal tar pitch as a carbon source, using a hard template or chemical activation method, has a long activation time, high energy consumption, high cost, and serious pollution
For example, the preparation of porous carbon materials with high specific surface area requires high temperature and high pressure conditions, high requirements for equipment, and poor safety performance
These problems have limited the development of porous materials such as activated carbon prepared from asphalt

Method used

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  • A kind of asphalt porous material and its preparation method and application
  • A kind of asphalt porous material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation specific surface area is 700m 2 / g, the pore volume is 0.30m 3 / g hypercrosslinked asphalt porous material.

[0028] The present embodiment adopts following formula:

[0029] Petroleum asphalt: 100kg;

[0030] Dimethoxymethane: 49kg;

[0031] Anhydrous ferric chloride: 210kg;

[0032] Dichloroethane: 500L.

[0033] Prepare asphalt porous material with above-mentioned formula composition according to following method:

[0034] 1. Dissolve the weighed petroleum asphalt in 1,2-dichloroethane. After the dissolution is complete, add dimethoxymethane, dissolve, stir and mix evenly, then add ferric chloride, mix evenly.

[0035] 2. Add the mixed composition to 80°C at one time, and crosslink for 12 hours.

[0036] 3. Add the solid obtained in step 2 into methanol, wash away part of the ferric chloride, extract with methanol for 5 hours, then extract with dichloromethane for 5 hours, and dry at 80°C for 12 hours.

[0037] The asphalt porous material prep...

Embodiment 2

[0039] The preparation specific surface area is 760m 2 / g, the pore volume is 0.32m 3 / g hypercrosslinked asphalt porous material.

[0040] The present embodiment adopts following formula:

[0041] Petroleum asphalt: 100kg;

[0042] Dimethoxymethane: 82kg;

[0043] Anhydrous aluminum trichloride: 350kg;

[0044] Dichloroethane: 500L.

[0045] Prepare asphalt porous material with above-mentioned formula composition according to following method:

[0046] 1. Dissolve the weighed petroleum asphalt in 1,2-dichloroethane. After the dissolution is complete, add dimethoxymethane, dissolve, stir and mix evenly, then add ferric chloride, mix evenly.

[0047] 2. Add the mixed composition to 80°C at one time, and crosslink for 12 hours.

[0048] 3. Add the solid obtained in step 2 into methanol, wash away part of the ferric chloride, extract with methanol for 5 hours, then extract with dichloromethane for 5 hours, and dry at 80°C for 12 hours.

Embodiment 3

[0050] The preparation specific surface area is 1452m 2 / g, the pore volume is 0.60m 3 / g hypercrosslinked asphalt porous material.

[0051] The present embodiment adopts following formula:

[0052] Petroleum asphalt: 100kg;

[0053] Biphenyl dichlorobenzyl: 320kg;

[0054] Anhydrous ferric chloride: 420kg;

[0055] Dichloroethane: 500L.

[0056] Prepare asphalt porous material with above-mentioned formula composition according to following method:

[0057] 1. Dissolve the weighed petroleum asphalt in 1,2-dichloroethane. After the dissolution is complete, add dimethoxymethane, dissolve, stir and mix evenly, then add ferric chloride, mix evenly.

[0058] 2. Add the mixed composition to 80°C at one time, and crosslink for 12 hours.

[0059] 3. Add the solid obtained in step 2 into methanol, wash away part of the ferric chloride, extract with methanol for 5 hours, then extract with dichloromethane for 5 hours, and dry at 80°C for 12 hours.

[0060] The asphalt porous mate...

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Abstract

The invention provides a porous asphalt material as well as a preparation method and application thereof and relates to asphalt. The porous asphalt material comprises the raw materials of petroleum asphalt and a cross-linking agent according to the mass ratio of 1: (0.49-6.4). The preparation method comprises the following steps: adding the petroleum asphalt, the cross-linking agent and a cross-linking catalyst into a solvent sequentially, heating for cross-linking reaction, cleaning a product obtained through reaction through methanol, then extracting the product obtained through reaction through methanol and dichloromethane and drying so as to obtain the porous asphalt material. The degree of cross-linking of the prepared porous asphalt material reaches 94% or above, the porous asphalt material passes a nitrogen adsorption test at 77 K, and results of a CO2 adsorption test under 1 bar at 273 k and 298 k, an H2 adsorption test under 1 bar at 77 k and a methylene blue dye adsorption test at 298 k for 1 h by the porous asphalt material show that the porous asphalt material can be applied to the adsorption application fields of gas adsorption and storage, dye adsorption and treatment and the like.

Description

technical field [0001] The invention relates to asphalt, in particular to an asphalt porous material and its preparation method and application. Background technique [0002] Bitumen is a product obtained during the processing of crude oil. It is composed of hydrocarbons and their derivatives of different molecular weights. It is a black or dark brown viscous liquid or solid at room temperature. It is an organic gelatinous substance. . Petroleum pitch is obtained by refining high-viscosity oil through vacuum distillation, and has no fixed chemical composition and physical constants. However, it cannot be used directly because it contains a large amount of colloid and asphaltenes, has a high acid value, and has a low viscosity index. [0003] Porous carbon materials prepared from pitch, such as activated carbon, etc. [0004] Chinese patent 200910043229.2 discloses a preparation method of a porous carbon material for energy storage. In this method, the specific surface ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02C02F1/28
CPCY02C20/40
Inventor 李磊李文庆张爱娟丁磊
Owner XIAMEN UNIV
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