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A kind of preparation method of high softening point asphalt

A high softening point asphalt and softening point technology, which is applied in the processing of tar pitch/petroleum pitch/natural pitch and the petroleum industry, etc., can solve problems such as complex process, long production cycle, and difficult operation, and achieve good compatibility, Effect of increasing energy consumption and increasing cost

Active Publication Date: 2017-02-01
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 problems of long production cycle, difficult operation and complex process in the process of producing high softening point asphalt in the prior art, the present invention provides a method for preparing high softening point asphalt, which has simple process, convenient operation and short production time Short, reduces energy consumption, saves production costs, the resulting product has a high softening point, excellent high temperature performance, and a wide range of applications

Method used

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  • A kind of preparation method of high softening point asphalt

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] Take 120g rock asphalt (softening point is 212°C) and 100g kerosene in a container, stir at room temperature (25°C) for 20 minutes, and prepare the mother liquor after fully mixing. Put 80g of vacuum residue with a penetration of 82 1 / 10mm (softening point is 44.6°C) in a blending tank and heat it to a molten state of 140°C. Add the mother liquor and feed compressed air, adjust the pressure reducing valve so that the gas inlet pressure of the blending tank is 0.15 MPa, keep the temperature of the blending tank at 190°C, stir for 100 minutes, then raise the temperature to 220°C, and stir for 30 minutes to obtain a high softening point asphalt product . The product properties are shown in Table 1.

Embodiment 2

[0032] Take 160g of rock asphalt (softening point is 226°C) and 150g of diesel oil in a container, stir at 60°C for 15 minutes, and prepare the mother liquor after fully mixing. Put 40g of vacuum residue with a penetration of 45 1 / 10mm (softening point: 47.8°C) in a blending tank and heat to a molten state of 150°C. Add mother liquor into the blending tank and feed compressed nitrogen, adjust the pressure reducing valve so that the gas inlet pressure of the blending tank is 0.22 MPa, keep the temperature of the blending tank at 210°C, stir for 90 minutes, then raise the temperature to 270°C, and stir for 25 minutes to obtain high Softening point bituminous products. The product properties are shown in Table 1.

Embodiment 3

[0036] Take 150g of rock asphalt (softening point is 226°C) and 130g of diesel oil in a container, stir at 50°C for 10 minutes, and mix thoroughly to obtain the mother liquor. Put 50g of vacuum residue (softening point: 46.2°C) with a penetration of 58 1 / 10mm into a blending tank and heat it to a molten state of 150°C. Add mother liquor into the blending tank and feed compressed air, adjust the pressure reducing valve so that the gas inlet pressure of the blending tank is 0.20 MPa, keep the temperature of the blending tank at 200°C, and stir for 85 minutes. The temperature of the mixing tank was raised to 260° C. and kept for 25 minutes. The process conditions and product properties are shown in Table 1.

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Abstract

The invention discloses a method for preparing asphalt with a high softening point. The method comprises the following steps: mixing a modifier with a compatilizer to obtain mother liquor, adding the mother liquor and a melted asphalt raw material into a mixing tank for stirring, feeding compressed gas from the bottom of the mixing tank at the same time for blowoff treatment to discharge the compatilizer through an outlet in the upper part of the mixing tank in the form of a gas phase, and cooling the compatilizer gas for recycling, and obtaining the asphalt with the high softening point at the end of blowoff treatment. The technology of the method is simple and is convenient to operate; the production time is short, the energy consumption is reduced, and the production cost is reduced; the obtained product is higher in softening point, good in high-temperature performance and wide in application range.

Description

technical field [0001] The invention relates to a preparation method of high softening point asphalt. 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 soften or flow 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] The production process of high softening point asphalt mainly adopts solvent deasphalting process or oxidation process. According to the existing solvent deasphalting process, in order to obtain high s...

Claims

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Application Information

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IPC IPC(8): C10C3/00
CPCC10C3/00
Inventor 傅丽姚汉荣郭皎河张建峰刘树华
Owner CHINA PETROLEUM & CHEM CORP
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