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Production method for high-softening point asphalt

A technology of high softening point asphalt and production method, which is applied in the direction of chemically processing tar asphalt/petroleum asphalt/natural asphalt, etc., can solve the problems of low reaction efficiency, long reaction time, complicated process and the like

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of long reaction time, low reaction efficiency and complicated process in the process of producing high softening point asphalt in the prior art, the present invention provides a production method of high softening point asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 80wt% of the vacuum residue with a penetration of 61 1 / 10mm at 25°C and a softening point of 46.3°C in an oxidation kettle and heat it to a molten state at 140°C. Add 20wt% coal tar pitch with a softening point of 65.4°C to the premix tank and heat it to 160°C, blow in air and keep the pressure inside the tank at 0.12MPa for 20 minutes. Open the throttle valve, gradually spray the coal tar pitch liquid into the oxidation kettle, and adjust the air flow rate to 0.2m after spraying completely. 3 × kg -1 × h -1 , carry out blowing oxidation, oxidation conditions and product properties are shown in Table 1.

Embodiment 2

[0028] Put 70wt% of the vacuum residue with a penetration of 82 1 / 10mm at 25°C and a softening point of 45.7°C in an oxidation kettle and heat it to a molten state at 130°C. Add 30wt% coal tar pitch with a softening point of 81.3°C to the premix tank and heat it to 160°C, blow in air and keep the pressure inside the tank at 0.28MPa for 35 minutes. Open the throttle valve of the premixing tank, and gradually spray the coal tar pitch liquid into the oxidation kettle. After spraying completely, adjust the air flow rate to 0.28m 3 × kg -1 × h -1 , carry out blowing oxidation, oxidation conditions and product properties are shown in Table 1.

Embodiment 3

[0032] Put 65wt% vacuum residue with a penetration of 43 1 / 10mm at 25°C and a softening point of 48.5°C in an oxidation kettle and heat it to a molten state at 150°C. Add 35wt% coal tar pitch with a softening point of 56.2°C to the premix tank and heat it to 160°C, feed air and keep the pressure inside the tank at 0.25MPa for 50 minutes. Open the throttle valve of the premixing tank, and gradually spray the coal tar pitch liquid into the oxidation kettle. After spraying completely, adjust the air flow rate to 0.22 m 3 × kg -1 × h -1 , carry out blowing oxidation, oxidation conditions and product properties are shown in Table 1.

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Abstract

The invention discloses a production method for high-softening point asphalt. The method is characterized by comprising: mixing an asphalt raw material A mixed with an oxygen-containing gas, leading the oxygen-containing gas mixed asphalt raw material A into an oxidation reactor to fully contact a molten state asphalt raw material B and undergo common reaction, and then introducing the oxygen-containing gas to undergo oxidation reaction, thus obtaining the high-softening point asphalt. Specifically, the asphalt raw material A is coal asphalt, and the asphalt raw material B is petroleum asphalt. The method provided by the invention has the advantages of simple process, convenient operation, high reaction efficiency and low energy consumption, and the obtained product has excellent high temperature performance.

Description

technical field [0001] The invention relates to a production method of high softening point asphalt, in particular to a production method of high softening point asphalt which adopts an oxidation process to improve the high temperature stability of the 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 p...

Claims

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Application Information

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IPC IPC(8): C10C3/04
Inventor 傅丽姚汉荣郭皎河张建峰刘树华
Owner CHINA PETROLEUM & CHEM CORP
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