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High-softening-point asphalt preparation method suitable for asphalt-based spherical activated carbon raw materials

A technology of high softening point asphalt and spherical activated carbon, which is applied in the direction of chemical processing of tar asphalt/petroleum asphalt/natural asphalt, etc., which can solve the long service life and the limitation of stirring motor power, affect the development of asphalt-based spherical activated carbon, and the price is high No inferior problems, achieve the effect of shortening the oxidation reaction time, reducing the activation reaction time, and realizing continuous production

Active Publication Date: 2019-01-22
湖南曦威新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, the existing research or industry is to reduce the influence of the temperature field gradient distribution of the batch reactor by reducing the inner diameter of the reactor and extending the length of the reactor, but the length of the reactor will be affected by the length of the stirring rod, Service life and limitation of stirring motor power
Therefore, in order to realize the batch production of coal tar pitch with high softening point, multiple sets of batch reactors are used for parallel production, which takes up a large area, requires large equipment investment, low production capacity, and high labor costs, which eventually lead to high softening point coal tar pitch The price remains high, which affects the development of pitch-based spherical activated carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using rock asphalt with a softening point of 220°C as the raw material, other physical and chemical properties of the raw material are as follows: n-heptane soluble matter is 31.6%, toluene soluble matter is 53.3%, quinoline insoluble matter is 23.9%, pyridine insoluble matter is 14.4% %, ash is 4.5%. Use a roller crusher to crush 2000Kg rock asphalt into rock asphalt particles with a diameter of 0.6-2mm. A vacuum feeding system is used to transport 2000Kg of asphalt granules to the hopper of the twin-screw extruder, and the feeding speed of the loss-in-weight scale is adjusted to 200Kg / h. The temperature of the 10 heating temperature zones of the twin-screw extruder is set sequentially from the feed inlet: 200°C, 300°C, 330°C, 330°C, 330°C, 330°C, 330°C, 300°C, 250°C, 235°C; The temperature of the head of the twin-screw extruder is set to 230°C; a vacuum port is set at every 2 heating temperature zones, and all 4 vacuum ports are closed; the end of the twin-screw extr...

Embodiment 2

[0033] Set the temperature of the 10 temperature zones of the twin-screw extruder in [Example 1] from the feed inlet to: 200°C, 360°C, 360°C, 360°C, 360°C, 360°C, 360°C, 300°C, 280°C, 255°C; the head temperature of the twin-screw extruder is set at 250°C; all other process parameters remain unchanged. The properties of the prepared high softening point pitch are as follows: the yield is 91.3%, the softening point is 258°C, the n-heptane soluble matter is 8.6%, the toluene soluble matter is 25.7%, the quinoline insoluble matter is 38.1%, and the pyridine insoluble matter is 38.1%. Matter 29.2%, ash 6.1%.

Embodiment 3

[0035]Set the temperature of the 10 temperature zones of the twin-screw extruder in [Example 1] from the feed inlet to: 200°C, 360°C, 360°C, 360°C, 360°C, 360°C, 360°C, 300°C, 270°C, 265°C; the head temperature of the twin-screw extruder is set to 260°C; all 4 vacuum ports are opened, and the gauge pressure of the 4 vacuum devices is adjusted to -0.03MPa; all other process parameters remain unchanged. The properties of the prepared high softening point pitch are as follows: the yield is 84.3%, the softening point is 266°C, the soluble matter in n-heptane is 4.9%, the soluble matter in toluene is 22.3%, the insoluble matter in quinoline is 42.5%, and the pyridine insoluble matter is 42.5%. Matter 32.4%, ash 6.6%.

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Abstract

The invention relates to a high-softening-point asphalt preparation method suitable for asphalt-based spherical activated carbon raw materials, special asphalt with the softening point of 130-220 DEGC is used as a raw material, a synergistic effect of negative pressure extraction and thermal polymerization reaction is utilized, a double-screw extruder with a certain number of vacuumizing ports isadopted, and the molecular weight distribution, softening point, group composition and other physical and chemical properties of high-softening point coal asphalt can be adjusted by adjusting the temperature and the extrusion speed of each temperature zone of the double-screw extruder, the number, the setting positions and the vacuum degrees of the vacuumizing ports. The softening point of the prepared high softening point asphalt is 240-280 DEG C, the content of n-heptane soluble substances is lower than 10%, the content of toluene soluble substances is lower than 30%, the content of quinoline insoluble substances is higher than 35%, the content of pyridine insoluble substances is higher than 20%, and the ash content is 0.02-8%. The high-softening-point asphalt preparation method has important significance for promotion of resource reutilization of the special asphalt and the asphalt-based spherical activated carbon and related materials (such as asphalt-based foam carbon).

Description

technical field [0001] The invention relates to a low-cost preparation method of high softening point asphalt suitable for use as a pitch-based spherical activated carbon raw material, and belongs to a preparation method of high softening point asphalt with a softening point of 240-280°C. Background technique [0002] Military-civilian integration and ecological civilization construction have become national strategies, and there is an urgent demand for special adsorption materials in key national defense projects, high-tech weapons and equipment, medicine, electronics, air and water purification. [0003] Pitch-based spherical activated carbon is a kind of adsorption material, but its unique spherical structure and spherical diameter (0.2-1.5mm) make it better than ordinary granular activated carbon and columnar activated carbon in terms of packing density, mechanical strength, and adsorption and desorption methods. 1. Powder activated carbon has incomparable performance ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/02
CPCC10C3/02
Inventor 詹亮李国俊李才毅罗浩
Owner 湖南曦威新材料有限公司
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