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90A road petroleum asphalt and preparation method thereof

A technology for road petroleum asphalt and distillate oil, which is used in the processing of tar asphalt/petroleum asphalt/natural asphalt, processing tar asphalt/petroleum asphalt/natural asphalt by distillation, and chemically processing tar asphalt/petroleum asphalt/natural asphalt, etc. , can solve the problems of asphalt flash point, anti-aging performance without substantial help, unable to meet low temperature performance at the same time, poor anti-aging ability of styrene-butadiene rubber, etc., to achieve the effect of improving self-healing ability, obvious flash point and excellent low temperature performance

Pending Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only increases the low-temperature elongation of asphalt, and does not substantially help asphalt flash point, anti-aging performance, etc.
Moreover, the added styrene-butadiene rubber has poor anti-aging ability and is easy to decompose under heating conditions, which makes the elongation of the prepared asphalt decrease rapidly after aging
[0007] In summary, the above methods are not suitable for the production of high-grade road asphalt from inferior raw materials, and the traditional blending method cannot make the obtained product meet the requirements of low temperature performance and flash point at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) First crush 15 parts of solution-polymerized styrene-butadiene rubber (SSBR) to a particle size of 0.5cm, and then add the crushed SSBR to 100 parts of aromatic-rich distillate oil preheated to 110°C (aromatic content is 45wt%, The boiling range is 310°C~450°C), cut at 130°C for 60 minutes, and the shear speed is 4000r / min; 2 Purging for 20min, adding 2 parts of methacrylic acid, 2 parts of maleimide and 0.05 part of sodium persulfate to the reactor, under N 2 Stir the reaction at 135°C for 4 hours under the atmosphere, maintain the reaction pressure at 0.8 MPa, and the stirring speed at 800 r / min; 2 Maintain a pressure of 0.8MPa, a stirring speed of 400 r / min, a growth temperature of 115°C, and a growth time of 120 minutes; after the growth is completed, it is placed in an oven at 100°C for 4 hours to obtain a low-temperature extension agent for use.

[0060] (2) Add 100 parts of Tahe slag heated to a fluid state (see Table 1 for properties) into a high-pressure r...

Embodiment 2

[0065] (1) First crush 15 parts of solution-polymerized styrene-butadiene rubber (SSBR) to a particle size of 0.5cm, and then add the crushed SSBR to 100 parts of aromatic-rich distillate oil preheated to 110°C (aromatic content is 45wt%, The boiling range is 310°C~450°C), cut at 120°C for 80 minutes, and the shear speed is 4000r / min; 2 Purging for 20min, adding 2 parts of methacrylic acid, 2 parts of fumaric acid and 0.05 part of potassium persulfate to the reactor, under N 2 Stir the reaction at 140°C for 3 hours under the atmosphere, maintain the reaction pressure at 1 MPa, and the stirring speed at 800 r / min; 2 Maintain a pressure of 0.8MPa, a stirring speed of 500 r / min, a growth temperature of 115°C, and a growth time of 120 minutes; after the growth is completed, it is placed in an oven at 100°C for 4 hours to obtain a low-temperature extension agent for use.

[0066] (2) The subsequent preparation process is the same as in Example 1 to obtain slag reduction A2 with th...

Embodiment 3

[0068] (1) The preparation conditions of the low-temperature extension agent are the same as those in Example 1.

[0069] (2) Add 100 parts of Tahe slag (see Table 1 for properties) into a high-pressure reactor at a temperature of 110°C and stir, and add 0.2 parts of phosphoric acid content (in terms of H 3 PO 4 Calculated) 135% polyphosphoric acid was slowly added to the reactor (completed within 3min), at a stirring speed of 600r / min, the temperature was raised to 140°C at a speed of 2°C / min. 2 The reaction was carried out under the atmosphere, the pressure in the reactor was maintained at 0.5 MPa, and the reaction time was 4 hours; after the reaction was completed, it was placed in an oven for heat preservation, the heat preservation temperature was 100°C, and the heat preservation time was 8 hours.

[0070] (3) Add 0.2 parts of phosphoric acid content (in the form of H 3 PO 4 Add 110% polyphosphoric acid to the Tahe slag after the reaction in (2), stir well, then add 0....

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Abstract

The invention discloses 90A road petroleum asphalt and a preparation method thereof. The 90A road asphalt which can meet standard requirements is prepared by synergistically matching difficult-to-treat inferior common slag as a raw material with polyphosphoric acid, an initiator, a component regulator and a low-temperature ductility enhancer. The asphalt has excellent low-temperature performance, especially aging resistance, so that the 90A asphalt still has good low-temperature extensibility after being aged.

Description

technical field [0001] The invention relates to a road asphalt and a preparation method thereof, in particular to a 90A road petroleum asphalt and a preparation method thereof. Background technique [0002] As crude oil becomes heavier, the yield of vacuum residue oil increases gradually, and the content of heavy metals and sulfur in the residue oil increases, making it more difficult to lighten the residue oil. However, it is difficult to produce asphalt by using inferior residue oil. The processing scheme is relatively simple, and the economic benefit is high. Asphalt production in China mainly adopts distillation and blending process, but with the deterioration of residual oil and the injection of light oil in the mining process, the relative content of saturated components and asphaltenes in residual oil increases, while the relative content of aromatic components and colloids decreases, and the relative content of asphalt The association degree of the substance increas...

Claims

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Application Information

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IPC IPC(8): C10C3/00C10C3/02C10C3/06
CPCC10C3/00C10C3/02C10C3/06
Inventor 刘成刘树华傅丽徐青柏张建峰吴晓颖郭小圣
Owner CHINA PETROLEUM & CHEM CORP
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