Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing spherical active cardon with base of asphaltum riched in mesopores

A pitch-based, activated carbon technology, applied in tar pitch/petroleum pitch/natural pitch processing, chemical instruments and methods, petroleum industry, etc.

Inactive Publication Date: 2004-03-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF4 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method still cannot avoid the disadvantages that the asphalt sphere shrinks with the overflow of hydrocarbons in the early stage of oxidation, and it is difficult to form the original large pores. The only way to expand the pore size is to rely on subsequent carbonization activation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] The modified asphalt with a softening point of 105°C was used as raw material, and the asphalt with a softening point of 250°C was prepared by oxidation at 300°C. Add 15wt% naphthalene at 270°C and stir evenly. Cool the pitch to 180° C., add 2 wt % thermosetting phenolic resin 213 and 1 wt % polyvinyl alcohol as a dispersant, and stir evenly. Add 5wt% ball-forming pitch to 1% polyvinyl alcohol aqueous solution, slowly heat up to 200° C. under stirring, and then cool under stirring to obtain pitch original balls. Raise the temperature of asphalt balls to 300°C at a rate of 0.5°C / min in the air to obtain unmelted pitch balls. In a fluidized bed activation reactor, the unmelted pitch balls were heated up to 850 °C at a rate of 10 °C / min for carbonization, and at the same time, water vapor was activated to prepare pitch-based spherical activated carbon. The properties of pitch-based spherical activated carbon are shown in Table 1.

Embodiment 2

[0008] As in Example 1, prepare pitch with a softening point of 300° C., add 40 wt % dimethylnaphthalene at 270° C., and stir evenly. Cool the pitch to 180° C., add 18 wt % thermosetting phenolic resin 214 and 5 wt % dispersant carboxymethyl cellulose, and stir evenly. Add 40wt% ball pitch into 5% polyvinyl alcohol aqueous solution, slowly heat up to 180 DEG C under stirring state, and then cool under stirring state to prepare pitch original balls. Raise the temperature of asphalt balls to 300°C at a rate of 5°C / min in the air to obtain unmelted pitch balls. In a fluidized bed activation reactor, the unmelted pitch pellets were heated up to 1000°C at a rate of 10°C / min for carbonization, and at the same time activated by passing water vapor to prepare pitch-based spherical activated carbon. The properties of pitch-based spherical activated carbon are shown in Table 1.

Embodiment 3

[0010] According to the method of Example 1, asphalt with a softening point of 230° C. was prepared, and 30% dimethylnaphthalene was added at 200° C., and stirred evenly. Cool the pitch to 80° C., add 8 wt % thermosetting phenolic resin 213 and 3 wt % dispersant carboxymethyl cellulose, and stir evenly. Add 30wt% ball-forming pitch to 2% polyvinyl alcohol aqueous solution, slowly heat up to 100 DEG C under stirring state, then cool under stirring state to prepare pitch original balls. Raise the temperature of the original asphalt balls to 280°C at a rate of 3°C / min in the air to obtain unmelted asphalt balls. In a fluidized bed activation reactor, the unmelted pitch pellets were heated up to 900°C at a rate of 8°C / min for carbonization, and at the same time activated by passing water vapor to prepare pitch-based spherical activated carbon. The properties of pitch-based spherical activated carbon are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A spherical asphalt-base activated carbon rich in mesopores is prepared from petroleum or coking by-product through preparing the asphalt with high softening point, adding arylhydrocarbon and thermosetting phenolic resin, spherisizing, oxidizing, charring and activating.

Description

[0001] Technical field: the invention belongs to a preparation method of activated carbon, in particular to a method for preparing pitch-based spherical activated carbon with controllable pore size and rich in mesopores by using pitch as raw material Background technique: [0002] Pitch-based spherical activated carbon has the characteristics of good sphericity, high mechanical strength, low resistance when using a fixed bed, and fast adsorption and desorption speed. It has been widely used in environmental protection, medical, military, chemical and other fields. Zl97101617.8 and ZL98104975.3 reported the preparation method of pitch-based spherical activated carbon, using pitch or tar as raw material, hydrocarbons as modifiers, using emulsification method to form balls, and preparing spherical activated carbon through oxidative carbonization activation. The oxidation rate of asphalt balls is determined by the rate of oxygen diffusion from the surface to the interior, and the d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B31/08C01B32/336C10C3/00
Inventor 吕春祥凌立成
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com