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CN-122012131-A - Production method of straight-run environment-friendly asphalt

CN122012131ACN 122012131 ACN122012131 ACN 122012131ACN-122012131-A

Abstract

The invention relates to the technical field of petrochemical industry, in particular to a production method of straight-run environment-friendly asphalt. The method comprises the steps of firstly, preparing low-density cycloalkyl low-sulfur crude oil and high-density cycloalkyl low-sulfur crude oil into mixed crude oil according to a certain proportion, wherein the low-density cycloalkyl low-sulfur crude oil accounts for 60% -80% of the mixed crude oil in mass percent, the high-density cycloalkyl low-sulfur crude oil accounts for 40% -20% of the mixed crude oil in mass percent, and secondly, obtaining residual oil fraction with an initial distillation point of >460 ℃ after the mixed crude oil is subjected to normal vacuum distillation, namely a straight-run environment-friendly asphalt finished product with toxic and harmful aromatic hydrocarbon meeting requirements. The invention effectively reduces the content of toxic and harmful polycyclic aromatic hydrocarbon in the asphalt, and obviously improves the environmental protection performance of asphalt products.

Inventors

  • ZHOU YANG
  • YANG YONG
  • CAO PENGYUN
  • SUN HONGYANG

Assignees

  • 中国石油天然气股份有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (6)

  1. 1. A production method of straight-run environment-friendly asphalt is characterized by comprising the following steps: Step one, preparing low-density cycloalkyl low-sulfur crude oil and high-density cycloalkyl low-sulfur crude oil into mixed crude oil according to a certain proportion, wherein the low-density cycloalkyl low-sulfur crude oil accounts for 60-80% of the mixed crude oil in mass percent, and the high-density cycloalkyl low-sulfur crude oil accounts for 40-20% of the mixed crude oil in mass percent; and step two, after the blended mixed crude oil is subjected to constant reduced pressure distillation, obtaining residual oil fraction with an initial distillation point of more than 460 ℃, namely the straight-run environment-friendly asphalt finished product with toxic and harmful aromatic hydrocarbon meeting the requirements.
  2. 2. The method for producing the straight-run environment-friendly asphalt according to claim 1, wherein the low-density naphthenic base low-sulfur crude oil is characterized in that the density is 940-970 kg/m 3 , the sulfur content is <5000mg/kg naphthenic base crude oil, the total content of colloid and asphaltene is >20%, the acid value is 4-6 mg/g, the wax content is <3%, and the API degree is 15-20.
  3. 3. The method for producing the straight-run environment-friendly asphalt according to claim 1, wherein the high-density naphthenic base low-sulfur crude oil is 970-990 kg/m 3 in density, the naphthenic base crude oil is <4000mg/kg in sulfur content, the total content of colloid and asphaltene is >20%, the acid value is 4-6 mg/g, the wax content is <3%, and the API degree is 10-16.
  4. 4. The method for producing the straight-run environment-friendly asphalt according to claim 1, wherein the straight-run environment-friendly asphalt is an asphalt finished product with penetration of 10-30 dmm, softening point of 50-70 ℃ and flash point of >280 ℃ and film oven test (mass change) < +/-0.1%.
  5. 5. The method for producing the straight run environment-friendly asphalt according to claim 1, wherein the toxic and harmful aromatic hydrocarbon in the finished product of the straight run environment-friendly asphalt comprises eight harmful polycyclic aromatic hydrocarbons, namely benzo [ a ] pyrene, benzo [ e ] pyrene, benzo [ b ] fluoranthene, benzo [ j ] fluoranthene, benzo [ k ] fluoranthene, benzo [ a ] anthracene, Dibenzo [ a, h ] anthracene; comprises fifteen toxic and harmful polycyclic aromatic hydrocarbons, such as benzo [ a ] pyrene, benzo [ e ] pyrene, benzo [ b ] fluoranthene, benzo [ j ] fluoranthene, benzo [ k ] fluoranthene, benzo [ a ] anthracene, Dibenzo [ a, h ] anthracene, benzo [ g, h, i ] perylene, fluoranthene, indenobenz [1,2,3-c, d ] pyrene, naphthalene, phenanthrene, pyrene.
  6. 6. The method for producing the straight-run environment-friendly asphalt according to claim 5, wherein the total content of eight toxic and harmful polycyclic aromatic hydrocarbons in the finished straight-run environment-friendly asphalt product is less than 20mg/kg, the content of benzo [ a ] pyrene is less than 2mg/kg, and the total content of fifteen toxic and harmful polycyclic aromatic hydrocarbons is less than 30mg/kg.

Description

Production method of straight-run environment-friendly asphalt Technical field: The invention relates to the technical field of petrochemical industry, in particular to a production method of straight-run environment-friendly asphalt. The background technology is as follows: The asphalt contains trace amounts of benzopyrene and polycyclic aromatic hydrocarbon, and the substances have certain carcinogenicity. Because asphalt is mainly applied to pavement of highway pavement in the traffic industry, and is not in direct contact with people, the problem is ignored. However, with the improvement of environmental protection requirements of society and environment, in many fields closely contacted with human bodies, the environmental protection safety performance of asphalt products is more and more concerned, and related technical requirements are put on the carcinogenicity of the products by both European Union REACH regulations and German GS-MARK. With development and application of asphalt technology, asphalt has been widely used in various industries, and is indispensible from people's life. Articles such as automobile interiors, fitness equipment, black rubber articles and the like produced by using asphalt as a main raw material are frequently contacted closely, and road construction units are more frequently contacted with asphalt products in a hot melt state. In the tire rubber industry, asphalt is used as a dispersing agent and a plasticizer, has a longer application history, but with the increasing requirements of areas such as European Union on environmental protection and medical safety, conventional asphalt cannot meet the application requirements, and medical safety requirements are put on materials in places in contact with human bodies, such as places of pipeline corrosion resistance, water resistance and seepage prevention, automobile interior decoration, sound insulation and damping, fitness facilities, children entertainment facilities and the like. At present, relevant regulations are not issued to the products in China, but strict technical requirements are required to be executed on the exported related products, and specified safety and environmental protection performance detection is carried out. The environment-friendly performance of asphalt has larger relevance with the type of crude oil and the production process, and by adopting how to process and specific parameters, the removal of cancerogenic substances and how to select proper crude oil and matched production process can be ensured, so that the residue of light components is reduced, and the key of producing environment-friendly asphalt products is realized. The invention comprises the following steps: The invention aims to solve the technical problem of providing a production method of straight-run environment-friendly asphalt, which effectively reduces the content of toxic and harmful polycyclic aromatic hydrocarbon in the asphalt and obviously improves the environment-friendly performance of asphalt products. The technical scheme adopted by the invention is that the production method of the straight-run environment-friendly asphalt comprises the following steps: Step one, preparing low-density cycloalkyl low-sulfur crude oil and high-density cycloalkyl low-sulfur crude oil into mixed crude oil according to a certain proportion, wherein the low-density cycloalkyl low-sulfur crude oil accounts for 60-80% of the mixed crude oil in mass percent, and the high-density cycloalkyl low-sulfur crude oil accounts for 40-20% of the mixed crude oil in mass percent; and step two, after the blended mixed crude oil is subjected to constant reduced pressure distillation, obtaining residual oil fraction with an initial distillation point of more than 460 ℃, namely the straight-run environment-friendly asphalt finished product with toxic and harmful aromatic hydrocarbon meeting the requirements. Further, the low-density cycloalkyl low-sulfur crude oil has the characteristics of 940-970 kg/m 3, the cycloalkyl crude oil with the sulfur content of <5000mg/kg, the total content of colloid and asphaltene of >20%, the acid value of 4-6 mg/g, the wax content of <3% and the API degree of 15-20. Further, the high-density naphthenic base low-sulfur crude oil has the characteristics of density of 970-990 kg/m 3, sulfur content of <4000mg/kg, total content of colloid and asphaltene of >20%, acid value of 4-6 mg/g, wax content of <3% and API degree of 10-16. Further, the straight-run environment-friendly asphalt finished product is an asphalt finished product with penetration of 10-30 dmm, softening point of 50-70 ℃ and flash point of >280 ℃ and film oven test (quality change) < +/-0.1%. Further, the toxic and harmful aromatic hydrocarbon in the straight-run environment-friendly asphalt finished product comprises eight harmful polycyclic aromatic hydrocarbons, namely benzo [ a ] pyrene, benzo [ e ] pyrene, benzo [ b ] fluoranthene, benzo [ j ] fluoranthene,