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Asphalt composition particle and preparation method thereof

A technology of asphalt composition and granules, which is applied in the direction of building structures, building components, building insulation materials, etc., can solve the problems of large particle size, inability to store at room temperature for a long time, and easy re-bonding into blocks, etc., to achieve anti-corrosion Excellent temperature-sensing performance, adjustable particle size, and excellent high-temperature performance

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the existing problems in the process of producing high softening point asphalt granules in the prior art, the particle size is large, it is easy to rebond into blocks after being crushed, and it cannot be stored at room temperature for a long time. Adding different additives, adopting the method of pre-dispersion-freezing-crushing to produce high softening point asphalt composition granules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add oxidized asphalt with a softening point of 152.0°C, accounting for 35% of the base asphalt, and dissolved asphalt with a softening point of 153.2°C, accounting for 65% of the base asphalt, and graphite accounting for 18% of the total material into the high-speed pulverizer, mixed Time 4s, put it in the freezer to freeze at -20°C, freeze for 8 hours, then pulverize, pulverize for 20s, add water-soluble acrylic resin accounting for 1.2% of the total material, and mix for 6s to obtain high softening point asphalt composition particles. Store at room temperature for 30 days and sieve.

Embodiment 2

[0034] The oxidized asphalt with a softening point of 164.5°C accounts for 30% of the base asphalt, and the dissolved asphalt with a softening point of 161.8°C accounts for 70% of the base asphalt, and graphite accounts for 18% of the total material and bentonite accounts for 6% of the total material , added to the high-speed pulverizer, mixing time 5s, put into the freezer to freeze at -25°C, freeze for 10 hours, pulverize for 25s, add water-soluble alkyd resin accounting for 1.0% of the total amount of materials, and mix for 5s to obtain high Softening point bituminous composition granules. Store at room temperature for 30 days and sieve.

Embodiment 3

[0038] The oxidized asphalt with a softening point of 176.2°C accounts for 55% of the base asphalt, and the dissolved asphalt with a softening point of 174.8°C accounts for 45% of the base asphalt, and graphite accounts for 10% of the total material and bentonite accounts for 4% of the total material. , 4% of the total material montmorillonite is added to the high-speed pulverizer, the mixing time is 5s, put it in the freezer at a freezing temperature of -30°C, freeze for 10 hours, and the pulverization time is 35s, add polyvinylpyrrolidone accounting for 1.5% of the total material, Mix for another 7s to obtain high softening point asphalt composition granules. Store at room temperature for 30 days and sieve.

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PUM

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Abstract

The invention provides an asphalt composition particle and a preparation method thereof. The preparation method comprises the following steps: selecting a base asphalt raw material with a proper softening point and adding the base asphalt raw material and a proper solid dispersant into a crushing apparatus for pre-dispersion; placing the pre-dispersed material in a low temperature environment until the material is embrittled, taking out the embrittled material and carrying out crushing immediately; adjusting the particle size of asphalt through controlling different refrigeration time and temperature and crushing time; and finally a small amount of a coating agent is added and carrying out mixing for a short time so as to prepare the asphalt composition particle with excellent high temperature performance and resistance to temperature sensitivity, a fine particle size, suitability for normal temperature storage and a high softening point. The asphalt composition particle with a high softening point prepared by using the preparation method in the invention has a particle size of less than 120 mm and is free of caking.

Description

technical field [0001] The invention relates to an asphalt composition granule and a preparation method, in particular to a high softening point asphalt composition for oil field drilling and a preparation method. 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, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L39/06C08L33/00C08L67/08C08K3/04C08K3/34
Inventor 傅丽姚汉荣刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP