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A kind of anionic emulsified asphalt and preparation method thereof

A technology of emulsified asphalt and anion, which is used in construction, building components, building insulation materials, etc., can solve problems such as cumbersome operation, achieve good stability, and expand varieties and types.

Active Publication Date: 2018-12-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsification process of this method requires a two-step method, that is, in the first step of the emulsification process, ordinary asphalt is emulsified to obtain emulsified asphalt, and then the pressure is increased to switch to the emulsification of high softening point asphalt, which is cumbersome to operate.

Method used

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  • A kind of anionic emulsified asphalt and preparation method thereof
  • A kind of anionic emulsified asphalt and preparation method thereof
  • A kind of anionic emulsified asphalt and preparation method thereof

Examples

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preparation example Construction

[0059] The preparation method of described anionic emulsified bitumen, comprises the steps:

[0060] (1) heating the asphalt to 130°C to 200°C;

[0061] (2) Diluting the auxiliary agent with water to obtain a diluted auxiliary agent;

[0062] (3) Dissolving the anionic surfactant and the diluted auxiliary agent in water at 50°C to 90°C to make a soap solution, and adjusting the pH value to 9-13;

[0063] (4) Pass the soap liquid into a high-speed shear mixing equipment, such as a high-speed shear colloid mill, circulate and heat the soap liquid to between 90°C and its boiling point;

[0064] (5) Continuously feed the soap solution, pass the asphalt into the mixing equipment from the inlet, obtain the emulsified asphalt system formed by dispersing the asphalt in water through high-speed shearing, and discharge it into the product tank from the outlet;

[0065] (6) Keep the mixing equipment and product tank pressure higher than the saturated vapor pressure of the emulsion;

[0...

Embodiment 1-5

[0099] Example 1-5 The process conditions are as shown in Table 1. After heating the asphalt with the softening point as shown in Table 1, add the asphalt tank and raise the temperature to the temperature shown in Table 1. The anionic surfactant and the diluted auxiliary agent are dissolved in water , be mixed with soap liquid, and make soap liquid after adjusting pH value and add soap liquid tank, soap liquid pH value, heating temperature are as shown in table 1. The colloid mill is heated to near soap liquid temperature. The soap solution is passed through the high-speed shear mixing equipment at a certain flow rate from the inlet, such as a high-speed shear colloid mill, and discharged from the outlet; the soap solution is continuously fed, and the asphalt is passed into the mixing equipment at a certain flow rate from the inlet , the colloidal dispersion system formed by bitumen dispersed in water is obtained by high-speed shearing, and discharged from the outlet; pressuri...

Embodiment 6-10

[0103] Example 6-10 The process conditions are as shown in Table 2. After heating the asphalt with the softening point as shown in Table 2, add the asphalt tank and raise the temperature to the temperature shown in Table 2. The anionic surfactant and the diluted auxiliary agent are dissolved in water , be mixed with soap liquid, and make soap liquid after adjusting pH value and add soap liquid tank, soap liquid pH value, heating temperature are as shown in table 2. The colloid mill is heated to near soap liquid temperature. The soap solution is passed through the high-speed shear mixing equipment at a certain flow rate from the inlet, such as a high-speed shear colloid mill, and discharged from the outlet; the soap solution is continuously fed, and the asphalt is passed into the mixing equipment at a certain flow rate from the inlet , the colloidal dispersion system formed by asphalt dispersed in water is obtained by high-speed shearing, and discharged from the outlet; the out...

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Abstract

The invention discloses anionic emulsified asphalt. The anionic emulsified asphalt comprises, by weight, 55-70% of asphalt, 1-5% of an anionic surfactant, 0-1% of an assistant and the balance water. The anionic emulsified asphalt has a softening point of 50-130 DEG C. The preparation method comprises the following steps of heating asphalt to a temperature of 130-200 DEG C, diluting the assistant by water to obtain the dilute assistant, dissolving the anionic surfactant and the dilute assistant in water at a temperature of 50-90 DEG C to obtain soap lye, feeding the soap lye into a mixing device with a high shearing rate, feeding the asphalt into the mixing device by an inlet, discharging the emulsified asphalt from an outlet, and cooling the emulsion to a room temperature so that the anionic emulsified asphalt finished product is obtained. The preparation method realizes a one-step high pressure emulsification production technology and produces emulsified asphalt with good stability. A SH / T0099.5-2005 emulsified asphalt storage stability measurement method proves that the stability after one day is less than or equal to 1% and the stability after five days is less than or equal to 5%.

Description

technical field [0001] The invention relates to an anionic emulsified asphalt and a preparation method thereof. The high softening point bitumen comes from petroleum, coal and other organic substances containing non-hydrocarbon compounds and polymers. The invention particularly relates to an emulsion system formed by asphalt with a softening point of 50-130°C in water, and a preparation method thereof through high-speed shearing of asphalt-emulsifier-auxiliary-water mixture under high temperature and high pressure. Background technique [0002] In recent years, emulsified asphalt has been widely used in road materials, building waterproofing, moisture-proofing, anti-corrosion of metal materials, anti-seepage of water conservancy construction, agricultural soil improvement, and plant growth. Existing multiple patents report viscous bitumen, the emulsion that petroleum hydrocarbons make in water. The main purpose of preparing asphalt and petroleum hydrocarbon emulsions is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08J3/03
Inventor 康伟青范维玉蔡智南国枝徐盛虎郑京禾王军王忠黄建华刘泊滟
Owner CHINA PETROLEUM & CHEM CORP
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