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Modified asphalt particle having high softening point, preparing method thereof and applications of the particle

A technology of high softening point asphalt and granules, used in chemical instruments and methods, buildings, building components, etc., can solve the problems of poor deformability of granules, complicated methods and processes, and achieve excellent high temperature performance, improve yield, and improve use. performance effect

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the complex process of preparing high-softening-point asphalt particles that meet the requirements of drilling fluids in the prior art, the preparation process requires the use of organic solvents, and the introduction of other additives that destroy the use system. Asphalt particles cannot be stored at room temperature for a long time, or crushed. After defects such as poor deformability of the particles, the present invention provides a modified high softening point asphalt particle, which is prepared by introducing a mixture of polymerized sulfur and non-polymerized sulfur as a modifier to prepare a particle with a small particle size, a high softening point, and good deformability. Bitumen pellets that can be stored stably for a long time at room temperature

Method used

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  • Modified asphalt particle having high softening point, preparing method thereof and applications of the particle
  • Modified asphalt particle having high softening point, preparing method thereof and applications of the particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put 100g of sulfur powder in a closed reaction kettle, heat it to 280°C, add 0.1g of 1-dodecene after 40 minutes, and feed N 2 Keep the pressure at 1.0MPa. Heat 400g of asphalt with a softening point of 131.3°C in a closed raw material tank to a molten state, and pass N 2Keep the pressure of the raw material tank at 0.8MPa, and react for 60 minutes. After the sulfur in the reactor melts and polymerizes, open the valves of the reactor and the asphalt raw material tank at the same time, spray the two liquids into the contact tower, and the molten sulfur enters from the upper part of the tower. , The molten bitumen enters from the lower part of the tower, so that the two are fully contacted in countercurrent and kept for 30 minutes. Open the discharge valve at the bottom of the contact tower, quickly spray the liquid into the quenching liquid containing 0.20g of isopropanol for rapid cooling, and form uniform particles of asphalt and high elastic sulfur, which are suspend...

Embodiment 2

[0036] Put 75g of sulfur powder in a closed reaction kettle, heat it to 300°C, add 0.12g of isoprene after 50 minutes, and feed N 2 Keep the pressure at 1.5MPa. Heat 425g of asphalt with a softening point of 146.2°C in a closed raw material tank to a molten state, and pass N 2 Keep the pressure of the raw material tank at 0.6MPa, and react for 75 minutes. After the sulfur in the reactor is melted and polymerized, open the valves of the reactor and the asphalt raw material tank at the same time, spray the two liquids into the contact tower, and the molten sulfur enters from the upper part of the tower. , The molten bitumen enters from the lower part of the tower, and the two are fully contacted in countercurrent and kept for 45 minutes. Open the discharge valve at the bottom of the contact tower, quickly spray the liquid into the quenching liquid containing 0.15g 6-chloro-1-hexanol for rapid cooling, and form uniform particles of asphalt and high elastic sulfur, and suspend in...

Embodiment 3

[0038] Put 150g of sulfur powder in a closed reaction kettle, heat it to 320°C, add 0.26g of 1-octadecene after 55 minutes, and feed N at the same time 2 Keep the pressure at 1.2MPa. Heat 350g of asphalt with a softening point of 155.5°C in a closed raw material tank to a molten state, and pass N 2 Keep the pressure of the raw material tank at 0.8MPa and react for 85 minutes. After the sulfur in the reactor melts and polymerizes, open the valves of the reactor and the asphalt raw material tank at the same time, spray the two liquids into the contact tower, and the molten sulfur enters from the upper part of the tower. , The molten bitumen enters from the lower part of the tower, so that the two are fully contacted in countercurrent and kept for 50 minutes. Open the discharge valve at the bottom of the contact tower, quickly spray the liquid into the quenching liquid containing 0.18g of 4-chloro-1-butanol for rapid cooling, form uniform particles of asphalt and high elastic su...

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Abstract

A modified asphalt particle having a high softening point, a preparing method thereof and applications of the particle are disclosed. The diameter of the particle is not more than 120 [mu]m. The particle includes a core made of base asphalt and a shell formed by a modifying agent, and includes 7-9 parts by mass of the core and 1-3 parts by mass of the shell. The modifying agent includes polymerized sulfur and free sulfur, and the weight ratio of the polymerized sulfur to the free sulfur in the modifying agent is 3:7-7:3. The modified asphalt having a high softening point is prepared by melting and polymerizing sulfur, then separately injecting the polymerized sulfur and melt asphalt from two ends of a reactor column to bring the polymerized sulfur and the melt asphalt into countercurrent contact, and then spraying the product to a quenching liquid containing a stabilizing agent to quench the product. According to the modified asphalt having a high softening point, the base asphalt is covered with a layer of high-elasticity polymerized sulfur, and the prepared product is low in particle diameter, has certain elastic deformation capability, has excellent high-temperature resistance, and can be stably stored at room temperature.

Description

technical field [0001] The invention relates to a modified high softening point asphalt, in particular to a deformable high softening point asphalt with smaller particle size. Background technique [0002] High softening point asphalt refers to asphalt with a softening point above 100°C, especially above 120°C. High softening point asphalt is widely used because of its excellent high temperature resistance. If it is used as a roof covering for building a house, it will not become very soft or even runny even in the hot summer. It can also be used in drilling operations in deep oil and gas fields. As an important part of drilling fluid, it can play a role in plugging, preventing collapse, stabilizing the well wall and reducing fluid loss under high temperature conditions. In addition, it can also be used as a modification additive for polymer materials. [0003] Asphalt products are widely used in the process of oil and gas drilling, and can be used as an important part of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K3/06
CPCC08L95/00C09K8/24C08L81/00C08K3/06C09K8/035C09K8/516C09K8/02C09K8/206C09K8/36
Inventor 傅丽郭皎河姚汉荣刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP
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