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A kind of high softening point asphalt particle, its preparation method and application

A high softening point asphalt and particle technology, applied in chemical instruments and methods, construction, building components, etc., can solve the problems of poor particle deformability, complex method and process, and achieve excellent high temperature performance, improve yield and stability. , the effect of improving performance

Active Publication Date: 2019-06-11
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 particles, the present invention provides a kind of high softening point asphalt, by introducing a mixture of polymerized sulfur and non-polymerized sulfur as a modifier, the prepared asphalt has small particle size, high softening point, good deformability and can be used in Long-term stable storage of asphalt granules at room temperature

Method used

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  • A kind of high softening point asphalt particle, its preparation method and application
  • A kind of high softening point asphalt particle, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 400g of oxidized asphalt with a softening point of 123.4°C and add it into water and use a high-shear emulsifier to pulverize it for 30 minutes, then add 8g of stearylamine polyoxyethylene ether and 0.1g of isopropanol and continue mixing for 10 minutes to obtain asphalt liquid; The sulfur powder is placed in a sulfur-melting tank and heated to 135°C, kept for 20 minutes, and then enters the reactor. The temperature of the reactor is controlled at 540°C, and N 2 , keep the pressure at 1.0MPa. This condition was maintained for 30 minutes. Then open the discharge valve at the bottom of the reaction kettle, quickly spray the steam containing polymerized sulfur into the prepared asphalt liquid for rapid cooling, keep it at 50°C for 40 minutes, fully solidify and stabilize, and then dehydrate and pump Vacuum drying process. The resulting solid is sieved with a vibrating sieve to obtain high softening point asphalt granules.

Embodiment 2

[0033] Take 425g of solvent-deoiled asphalt with a softening point of 138.5°C and add it to water and use a high-shear emulsifier to pulverize it for 35 minutes, then add 6.5g of fatty alcohol polyoxyethylene ether (AEO-7) and 0.35g of diisopropyl yellow disulfide The orthoester continued to mix for 20 minutes to obtain asphalt liquid; put 75g of sulfur powder in a sulfur melting kettle and heat it to 140°C, keep it for 25 minutes, and then enter the reaction kettle, the temperature of the reaction kettle was controlled at 550°C, and N 2 , to maintain a pressure of 0.8MPa. This condition was maintained for 30 minutes. Then open the discharge valve at the bottom of the reaction kettle, quickly spray the steam containing polymerized sulfur into the prepared asphalt liquid for rapid cooling, keep it at 55°C for 50 minutes, fully solidify and stabilize, and then dehydrate and pump Vacuum drying process. The resulting solid is sieved with a vibrating sieve to obtain high softenin...

Embodiment 3

[0035] Take 350g of natural asphalt with a softening point of 143.6°C and add it to water and use a high-shear emulsifier to pulverize it for 40 minutes, then add 4.5g of dodecylamine polyoxyethylene ether and 0.2g of 4-chloro-1-butanol and continue mixing for 25 minutes. To obtain asphalt liquid; put 150g of sulfur powder in a sulfur melting kettle and heat it to 130°C, keep it for 45 minutes, and then enter the reaction kettle, the temperature of the reaction kettle is controlled at 580°C, and N 2 , to maintain a pressure of 0.6 MPa. This condition was maintained for 40 minutes. Then open the discharge valve at the bottom of the reaction kettle, quickly spray the steam containing polymerized sulfur into the prepared asphalt liquid for rapid cooling, keep it at 60°C for 40 minutes, fully solidify and stabilize, and then dehydrate and pump Vacuum drying process. The resulting solid is sieved with a vibrating sieve to obtain high softening point asphalt granules.

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Abstract

The invention discloses a preparation method of an asphalt grain with a high softening point and an application; the asphalt grain is prepared by adding asphalt in water and smashing; adding stable dispersing agent and stabilizing agent, forming asphalt fluid; preheating sulphur and raising temperature to 500-600 DEG C; charging inert gases, keeping pressure and forming poly-sulphur steam; spraying the poly-sulphur steam to the asphalt fluid, wherein the addition of the both is 1-3:7-9 according to the mass ratio of sulphur and foundation asphalt; forming asphalt grain and suspending in the asphalt fluid; keeping for 30-120 minutes at 40-65 DEG C; dewatering and drying; bolting the solid by a vibrating sieve to obtain the asphalt grain with the high softening point, wherein the stable dispersing agent is polyoxyethylene ether, and the stabilizing agent is alcohol or xanthate. The ashapht prepared by the invention is prepared by coating a layer of high-elasticity poly-sulphur at outside of the foundation asphalt; the product is not only small in grain diameter but also possessed off elastic deformation ability; the asphalt is good in heat resistance and able to stably store under constant temperature, and can be used for preparing the drilling fluid.

Description

technical field [0001] The invention relates to a preparation method of high softening point asphalt granules, in particular to a high softening point asphalt with small particle size and deformability. 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 u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K3/06C09K8/035
Inventor 傅丽姚汉荣郭皎河刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP
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