Preparation method of 70# grade-A pavement petroleum asphalt based on oil slurry blending

Abstract

The invention provides a preparation method of 70# grade-A pavement petroleum asphalt based on oil slurry blending. The preparation method comprises steps as follows: oil slurry is mixed with raw materials, a mixture enters a reduced-pressure distillation tower for reduced-pressure distillation, and the 70# grade-A pavement petroleum asphalt based on oil slurry blending is obtained; the oil slurryis catalytic cracking distillate oil slurry, catalytic cracking heavy oil slurry, catalytic cracking residual oil slurry or distillate oil doped catalytic cracking residual oil slurry; the raw materials are one or more of raw petroleum, atmospheric pressure residual oil of the raw petroleum and vacuum residual oil of the raw petroleum; a mass ratio of the oil slurry to the raw materials is (1-25):1. The preparation method mainly depends on an atmospheric and vacuum distillation unit, effective utilization of resources with low additional value can be realized by simple modification, high-grade pavement petroleum asphalt meeting the requirement of standard specification for construction and acceptance of highway asphalt pavement (JTG-F40-2004) of Ministry of Transport is produced successfully, and anti-aging performance of the pavement petroleum asphalt is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, in particular to a method for preparing oil slurry blended 70#A grade road petroleum asphalt. Background technique [0002] Catalytic cracking is one of the important heavy oil lightening processes in refineries. In recent years, due to the direct processing of atmospheric residues or blending of part of vacuum residues, the catalysts are severely coked and the activity rapidly declines. In order to increase its processing capacity , had to increase the amount of oil slurry thrown out, generally reaching 5 to 10% of the processing amount. [0003] As a low value-added product of catalytic cracking, oil slurry has a high content of polycyclic aromatic hydrocarbons and colloids, and it is difficult to crack and easy to generate coke during the refining process. At present, the vast majority of oil slurry is used as a blending component of fuel oil or used to mix coking raw materials, ...

AI Technical Summary

Problems solved by technology

[0005] The main problem of oil slurry blended asphalt is that after the blended asphalt is aged in a film oven, the quality loss is relatively large, the penetration is relatively low, and the aging performance is deteriorated

Chinese patent CN1493653A proposes to use solvent refining extract oil and catalytic cracking oil slurry composition as an enhanced distillation agent to act on one or more compositions of crude oil, atmospheric residue, and vacuum residue to produce heavy traffic roads The disadvantage of asphalt is that the enhanced distillation agent is a composition, and its ratio and dosage vary greatly with the nature of the raw materials. The performance index of the produced asphalt only meets the technical requirements of the national standard GB / T15180-2010 heavy traffic road asphalt, which is lower than Technical requirements for road petroleum asphalt in JTG F40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement" by the Ministry of Transport