Road asphalt and preparation method thereof

Abstract

The present invention belongs to the technical field of petrochemical industry, and discloses a road asphalt and a preparation method thereof. The road asphalt of the present invention comprises the following components by weight: 60-70 parts of vacuum residue oil, 25-30 parts of propane deoiled asphalt, and 6-10 parts of furfural refined extracted oil. The road asphalt of the present invention meets the requirements of Class A and Class B road asphalt with a grade of 70 or 90 specified in the "Technical Specifications for Highway Asphalt Pavement Construction of the Ministry of Transport" (JTG-F40 2004). Compared with the asphalt prepared by blending the same raw materials with similar performance indicators, the amount of extracted oil used in the present invention is less than the currently used extracted oil, which can reduce the amount of extracted oil. Under the same amount of extracted oil, the performance index of the asphalt sample blended with the extracted oil is better than that of the currently used asphalt sample blended with the extracted oil, which can improve the quality of the asphalt product.

Description

Technical Field

[0001] The invention relates to the field of petrochemical industry, in particular to the field of asphalt blending technology, in particular to road asphalt and a preparation method thereof. Background Art

[0002] The blending method is the most important one among many asphalt production processes. The blending method for producing asphalt is initially to re-blend the four components of asphalt from the same crude oil in the proportions required for quality requirements. With the development of process technology, the sources of blending components have been expanded. For example, the residues or components of the first or second processing of the same crude oil or different crude oils and various industrial waste oils can be used as blending components.

[0003] Furfural refined extracted oil is one of the main components of asphalt blending. Furfural refined extracted oil is a by-product produced in the furfural refining process of lubricating oil. There are various types of non-ideal substances in distillate oil and residual lubricating oil from solvent deasphalting, such as colloid, asphaltene, short side chain medium and heavy aromatics, polycyclic and heterocyclic compounds and other wastes. According to its raw materials, it is divided into second-line, third-line, fourth-line and light deasphalting furfural refined extracted oil. These raw materials are distillate oil obtained by vacuum distillation of crude oil and distillate oil obtained by solvent deasphalting of vacuum residue oil. Therefore, the reuse of furfural refined extracted oil is of great significance. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a road asphalt and a preparation method thereof.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a road asphalt comprising the following components by weight:

[0007] 60-70 parts of vacuum residue oil, 25-30 parts of propane deoiled asphalt, 6-10 parts of furfural refined extracted oil.

[0008] The road asphalt of the present invention meets the requirements of grade A and grade B road asphalt with a grade of 70 or 90 specified in the "Technical Specifications for Highway Asphalt Pavement Construction of the Ministry of Communications" (JTG-F40 2004).

[0009] As a preferred embodiment of the road asphalt of the present invention, the vacuum residue oil is a vacuum residue oil obtained by refining one type of intermediate base crude oil and / or naphthenic crude oil or mixing multiple types.

[0010] As a preferred embodiment of the road asphalt of the present invention, the needle penetration of the vacuum residue oil is 30 1 / 10mm-55 1 / 10mm.

[0011] As a preferred embodiment of the road asphalt of the present invention, the propane de-oiled asphalt is de-oiled asphalt obtained by subjecting vacuum residue of non-paraffin-based crude oil to propane de-asphalting.

[0012] As a preferred embodiment of the road asphalt of the present invention, the penetration of the propane de-oiled asphalt is 60 1 / 10mm-80 1 / 10mm.

[0013] As a preferred embodiment of the road asphalt of the present invention, the furfural refined extracted oil is obtained by treating the three-wax oil obtained by hydrogenation of slurry bed residue with furfural, which is different from the commonly used furfural refined extracted oil obtained by treating the distillate oil obtained by vacuum distillation of crude oil and the distillate oil obtained by solvent deasphalting of vacuum residue with furfural refining process.

[0014] As a preferred embodiment of the road asphalt of the present invention, the furfural refined extracted oil has an aromatic content greater than 75% and a colloid content greater than 6.5%.

[0015] In a second aspect, the present invention further provides a method for preparing the road asphalt, comprising the following steps:

[0016] (1) taking the vacuum residue and propane solvent for deasphalting, and stirring at 130° C.-165° C.;

[0017] (2) Add the furfural refined oil and stir.

[0018] As a preferred embodiment of the method for preparing road asphalt of the present invention, in the step (1) and the step (2), the stirring time is 1 hour to 4 hours.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The road asphalt of the present invention meets the requirements of grade A and grade B road asphalt with a grade of 70 or 90 specified in the "Technical Specifications for Highway Asphalt Pavement Construction of the Ministry of Communications" (JTG-F40 2004).

[0021] Compared with asphalt that meets the standards and has similar performance indicators prepared by blending the same raw materials, the amount of extracted oil used in the present invention is less than the currently used extracted oil, which can reduce the amount of extracted oil used. Under the same amount of extracted oil, the performance indicators of the asphalt sample blended with the extracted oil are better than the asphalt sample blended with the currently used extracted oil, which can improve the quality of asphalt products. DETAILED DESCRIPTION

[0022] To better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be understood by those skilled in the art that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In the following embodiments and comparative examples, the reagents or materials involved are commercially available unless otherwise specified.

[0023] Example 1: A road asphalt

[0024] (1) The raw materials and their proportions used for the road asphalt are:

[0025] In parts by weight, there are 69 parts of vacuum residue oil, 25 parts of propane deoiled asphalt, and 6 parts of furfural refined extracted oil.

[0026] Among them, the vacuum residue oil is obtained by mixing Basra heavy crude oil and Castile crude oil in a weight ratio of 1:1, with a needle penetration of 38 1 / 10mm; the propane deasphalted oil is obtained by treating Oman vacuum residue oil with a propane deasphalting process, with a needle penetration of 701 / 10mm; the furfural refined extracted oil is obtained by treating the three-wax oil obtained by hydrogenation of slurry bed residue oil with a furfural refining process, with an aromatic hydrocarbon content of 79.3% and a gum content of 10.6%.

[0027] (2) The preparation method of the road asphalt is:

[0028] 1) feeding the vacuum residue oil and propane deasphalted oil into an asphalt blending tank according to the usage ratio, and stirring at 130° C.-165° C. for 1 h-4 h;

[0029] 2) Add the furfural refined oil according to the dosage ratio and stir for 1h-4h.

[0030] Example 2: A road asphalt

[0031] (1) The raw materials and their proportions used for the road asphalt are:

[0032] In parts by weight, there are 64 parts of vacuum residue oil, 30 parts of propane deoiled asphalt, and 6 parts of furfural refined extracted oil.

[0033] Among them, vacuum residue is obtained by mixing Kuwait crude oil, Castile crude oil and Maya crude oil in a weight ratio of 35:50:15, with a needle penetration of 30 1 / 10mm. Propane deasphalted oil is obtained by treating Oman vacuum residue with propane deasphalting process, with a needle penetration of 70 1 / 10mm. Furfural refined extracted oil is obtained by treating the three wax oil obtained by hydrogenation of slurry bed residue with furfural refining process, with an aromatic content of 79.3% and a colloid content of 10.6%.

[0034] (2) The preparation method of the road asphalt is:

[0035] 1) feeding the vacuum residue oil and propane deasphalted oil into an asphalt blending tank according to the usage ratio, and stirring at 130° C.-165° C. for 1 h-4 h;

[0036] 2) Add the furfural refined oil according to the dosage ratio and stir for 1h-4h.

[0037] Comparative Example 1: A road asphalt

[0038] The difference from Example 1 is that:

[0039] The furfural refined extracted oil used is the furfural refined extracted oil obtained by treating the reduced pressure distillation of the common crude oil with the furfural refining process, and the aromatic content of the furfural refined extracted oil is 79.2%, and the colloid content is 5.2%.

[0040] Comparative Example 2: A road asphalt

[0041] The difference from Example 1 is that:

[0042] The raw materials and proportions used for the road asphalt are:

[0043] In parts by weight, there are 67 parts of vacuum residue oil, 25 parts of propane deoiled asphalt, and 8 parts of furfural refined extracted oil.

[0044] The furfural refined extracted oil is a furfural refined extracted oil obtained by treating the reduced pressure distillation of the common crude oil with the furfural refining process to obtain the furfural refined extracted oil as the blending soft component. The aromatic content of the furfural refined extracted oil is 79.2%, and the colloid content is 5.2%.

[0045] Comparative Example 3: A road asphalt

[0046] The difference from Example 2 is that:

[0047] The furfural refined extracted oil used is the furfural refined extracted oil obtained by treating the reduced pressure distillation of the common crude oil with the furfural refining process, and the aromatic content of the extracted oil is 79.2%, and the colloid content is 5.2%.

[0048] Comparative Example 4: A road asphalt

[0049] The difference from Example 2 is that:

[0050] The raw materials and proportions used for the road asphalt are:

[0051] In parts by weight, there are 62 parts of vacuum residue oil, 30 parts of propane deoiled asphalt, and 8 parts of furfural refined extracted oil.

[0052] The furfural refined extracted oil is a furfural refined extracted oil obtained by treating the reduced pressure distillation of the common crude oil with the furfural refining process, and the aromatic content of the extracted oil is 79.2%, and the colloid content is 5.2%.

[0053] Comparative Example 5: A road asphalt

[0054] The difference from Example 2 is that:

[0055] The raw materials and proportions used for the road asphalt are:

[0056] In parts by weight, there are 69 parts of vacuum residue oil, 25 parts of propane deoiled asphalt, and 6 parts of furfural refined extracted oil.

[0057] The various indicators of the road asphalt prepared in Examples 1 and 2 and Comparative Examples 1-5 were tested, and the results are shown in Table 1:

[0058] Table 1: Comparison of data between examples and comparative examples

[0059]

[0060]

[0061] From the data in Table 1, it can be seen that the road asphalt obtained in Example 1 meets the requirements of the grade 90A road asphalt specified for asphalt. The formula dosage of Comparative Example 1 and Example 1 is the same, and Comparative Example 1 is 70A grade asphalt. The penetration of the road asphalt of Example 1 is significantly greater than that of Comparative Example 1, and the ductility and residual ductility of the road asphalt of Example 1 are better than those of Comparative Example 1. The road asphalts of Comparative Example 2 and Example 1 are both 90#A grade asphalts, and the viscosity performance of the road asphalt of Example 1 is better than that of Comparative Example 2, and the other indicators are not much different. However, the amount of extracted oil used in the road asphalt of Example 1 is less than that of Comparative Example 2. The performance indicators of the road asphalt obtained in Example 2 all meet the requirements of the grade 70A road asphalt specified for asphalt. The formula dosage of the road asphalt of Comparative Example 3 and Example 2 is the same, although Comparative Example 3 is 70A grade asphalt, but the penetration of the road asphalt of Example 2 is significantly greater than that of Comparative Example 3, and the ductility and residual ductility of the road asphalt of Example 2 are better than those of Comparative Example 3. Compared with the road asphalt of Example 2, the viscosity performance of the road asphalt of Example 2 is better than that of Comparative Example 4, and the other indicators are not much different. However, the amount of extracted oil used in the viscosity performance of Example 2 is less than that of Comparative Example 4. From the comparison results, the effect of the extracted oil refined by hydrogenating three-wax oil furfural from slurry bed residue oil on the penetration of the blended asphalt sample is significantly greater than that of the commonly used furfural refined extracted oil from four-line distillate oil. When preparing asphalt with similar performance indicators that meet the standards by blending with the same raw materials, the amount of the extracted oil refined by hydrogenating three-wax oil furfural from slurry bed residue oil described in the present invention is less than that of the currently used extracted oil. Under the same amount of extracted oil, the performance indicators of the asphalt sample blended with the hydrogenated three-wax oil furfural refined extracted oil from slurry bed residue oil described in the present invention are better than those of the asphalt sample blended with the currently used extracted oil.

[0062] From the road asphalt of Comparative Example 5, when the needle penetration value of the residual oil used is at the lower limit of the range, its ratio is at the upper limit of the range, and the ratio of the deasphalted oil and the extracted oil is at the lower limit of the range, the obtained asphalt sample is 50B grade asphalt, not the No. 70 and No. 90 asphalts to be prepared in the present invention.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A road asphalt, characterized in that: The composition is composed of 69 parts of vacuum residue oil, 25 parts of propane deoiled asphalt and 6 parts of furfural refined extracted oil by weight; The vacuum residue is obtained by mixing Basra heavy crude oil and Castile crude oil in a weight ratio of 1:1, and has a needle penetration of 38 1 / 10mm; the propane deoiled asphalt is obtained by treating Oman vacuum residue with a propane deasphalting process, and has a needle penetration of 701 / 10mm; the furfural refined extracted oil is obtained by treating the three-wax oil obtained by hydrogenating slurry bed residue with a furfural refining process, and has an aromatic content of 79.3% and a gum content of 10.6%; The effect of furfural refined extract oil of slurry bed residue hydrogenation minus three wax oil on the penetration of blended asphalt samples is greater than that of furfural refined extract oil of minus four line distillate oil; The amount of extracted oil used in the slurry bed residue oil hydrogenation and tri-wax oil furfural refining is less than the currently used extracted oil; The method for preparing the road asphalt comprises the following steps: Step (1) taking the vacuum residue oil and propane deoiled asphalt and stirring at 130° C.-165° C.; In step (2), the furfural refined oil is added and stirred.

2. A road asphalt, characterized in that: By weight, it is composed of 64 parts of vacuum residue oil, 30 parts of propane deoiled asphalt, and 6 parts of furfural refined extracted oil; The vacuum residue oil is obtained by mixing Kuwait crude oil, Castile crude oil and Maya crude oil in a weight ratio of 35:50:15, and the needle penetration is 30 1 / 10mm; the propane deoiled asphalt is obtained by treating Oman vacuum residue oil with a propane deasphalting process, and the needle penetration is 70 1 / 10mm; the furfural refined extracted oil is obtained by treating the three-wax oil obtained by hydrogenating slurry bed residue oil with a furfural refining process, and the aromatic content is 79.3%, and the gum content is 10.6%; The effect of furfural refined extract oil of slurry bed residue hydrogenation minus three wax oil on the penetration of blended asphalt samples is greater than that of furfural refined extract oil of minus four line distillate oil; The amount of extracted oil used in the slurry bed residue oil hydrogenation and tri-wax oil furfural refining is less than the currently used extracted oil; The method for preparing the road asphalt comprises the following steps: Step (1) taking the vacuum residue oil and propane deoiled asphalt and stirring at 130° C.-165° C.; In step (2), the furfural refined oil is added and stirred.

3. The road asphalt according to claim 1 or 2, characterized in that: In the step (1) and the step (2), the stirring time is 1 h to 4 h.

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