A hydraulic asphalt and a method for producing the same

Abstract

The application discloses hydraulic asphalt and a preparation method thereof. The hydraulic asphalt comprises the following components in parts by weight: 100 parts of first base asphalt; 8-25 parts of performance regulator; and 3-12 parts of pretreatment agent. The performance regulator comprises the following components in parts by weight: 100 parts of second base asphalt; 20-60 parts of oil sand asphalt; and 0.1-2 parts of modifier. The hydraulic asphalt meets the technical requirements of No. 2 hydraulic asphalt in the product standard SH / T0799-2007 of hydraulic petroleum asphalt.

Description

Technical Field

[0001] This invention relates to the fields of water conservancy and petrochemicals, specifically to a hydraulic bitumen and its preparation method. Background Technology

[0002] Hydraulic asphalt, a special type of petroleum asphalt, has excellent flexibility and impermeability, and is widely used in water conservancy projects such as reservoirs, earth-rock dams, canal embankments, and channel seepage prevention.

[0003] Compared to conventional reinforced concrete, hydraulic asphalt concrete is a viscoelastic-plastic material. Its main advantages lie in its adaptability to deformation and its impermeability. Additionally, hydraulic asphalt concrete offers advantages such as smaller project size and faster construction. With the rapid development of China's hydropower industry and the advancement of asphalt concrete seepage prevention technology, more and more water conservancy projects will adopt this technology. Since hydraulic asphalt is a crucial raw material for asphalt concrete seepage prevention, very stringent quality requirements are imposed on it to ensure the safety and durability of water conservancy projects. These requirements include excellent high-temperature aging resistance and low-temperature crack resistance.

[0004] In 2008, China implemented the petrochemical industry standard "Hydraulic Petroleum Asphalt" product standard SH / T0799-2007. This standard specifies quality requirements for different grades of hydraulic asphalt for various hydraulic asphalt concrete construction structures. Specifically, No. 1 hydraulic asphalt is mainly suitable for the anti-seepage layer of hydraulic structure panels, No. 2 for the core wall of hydraulic structures, and No. 3 for the sealing layer. Currently, most hydraulic asphalt production uses SBS modification technology. While technically feasible from the perspective of hydraulic asphalt technical indicators, polymer degradation may reduce the service life of the hydraulic asphalt. Therefore, further improvement of existing hydraulic asphalt development technology is of great significance to the development of water conservancy engineering.

[0005] CN100365098C discloses a method for preparing hydraulic asphalt. This method uses a mild oxidation process, selecting base raw materials with suitable consistency (i.e., penetration value) and density, and appropriate process conditions. Hydraulic asphalt products are prepared by moderately oxidizing the heated and molten base asphalt by introducing oxygen or an oxygen-containing gas (such as air). This oxidation process generates a large amount of waste gas, causing environmental pollution, and subsequent treatment is relatively complex; therefore, this process is rarely used for the production of hydraulic asphalt nowadays.

[0006] CN114479494A discloses a hydraulic asphalt with excellent adhesion and its preparation method. This modified asphalt comprises the following components by weight: 100 parts of 70# base asphalt; 1.5-3.8 parts of SBS modifier; 0-1.5 parts of SBR modifier; 1.3-3.8 parts of elastomeric agent; 0.5-1 part of anti-stripping agent; and 0.08-0.2 parts of stabilizer. This modified hydraulic asphalt suffers from several problems, including polymer lifespan limitations, difficulties in production and construction, and high modification costs, which restricts the large-scale application of this process.

[0007] CN103232712B discloses a hydraulic asphalt and its preparation method. This method modifies heavy-duty asphalt with SBS / waste rubber powder to obtain a hydraulic asphalt product that meets the required specifications. Although this hydraulic asphalt exhibits good low-temperature crack resistance, the preparation process is complex, the production cost is high, and the SBS modifier and waste rubber powder modifier used have poor stability, affecting the service life of the engineering project. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a hydraulic asphalt and its preparation method. The hydraulic asphalt meets the technical requirements for No. 2 hydraulic asphalt in the product standard SH / T0799-2007, "Hydraulic Petroleum Asphalt".

[0009] The first aspect of this invention provides a hydraulic bitumen, comprising the following raw material components by weight:

[0010] First base bitumen: 100 parts;

[0011] Performance modifier: 8-25 parts, preferably 10-20 parts;

[0012] Pretreatment agent: 3-12 parts, preferably 5-10 parts;

[0013] The performance modifier, by weight, comprises the following raw material components:

[0014] Second base bitumen: 100 parts;

[0015] Oil sand asphalt: 20-60 parts, preferably 30-50 parts;

[0016] Modifier: 0.1 to 2 parts, preferably 0.2 to 1.2 parts.

[0017] The hydraulic asphalt does not contain high molecular polymers, such as SBS and SBR.

[0018] The first base asphalt is Grade 70 A asphalt refined from single naphthenic crude oil, and its basic properties meet the technical requirements of the corresponding grade of "road petroleum asphalt".

[0019] The second base asphalt is Grade 70 A asphalt refined from single naphthenic crude oil, and its basic properties meet the "Technical Specifications for Road Petroleum Asphalt" of the corresponding grade. The properties of the second base asphalt and the first base asphalt may be exactly the same or different, as long as their basic properties meet the "Technical Specifications for Road Petroleum Asphalt" of the corresponding grade.

[0020] The oil sands asphalt is one or more of the following: Inner Mongolia oil sands asphalt, Qinghai oil sands asphalt, Indonesian oil sands asphalt, and Kazakhstani oil sands asphalt.

[0021] The properties of the oil sands bitumen include: a softening point of not less than 50℃, preferably 55℃~65℃; a flash point of not less than 232℃, preferably 235℃~256℃; a pour point of 25℃~32℃; and a viscosity of 1450~1600 mmHg at 100℃. 2 / s, preferably 1500-1600mm 2 The composition is as follows: residual carbon content is 9.5wt%–15.1wt%, sulfur content is 2.0wt%–6.1wt%, carbon content is 84wt%–87wt%, hydrogen content is 10wt%–12.4wt%, and nitrogen content is 0.2wt%–0.8wt%. By mass fraction, saturated matter accounts for 10.1%–30.7%, aromatic matter accounts for 15.6%–35.9%, resin accounts for 30.4%–45.8%, asphaltenes account for 10.7%–27.3%, and preferred asphaltenes account for 11.3%–25.2%.

[0022] The modifier is a mixture of polyphosphoric acid and dodecylbenzenesulfonic acid, wherein the polyphosphoric acid contains 125%–145% phosphoric acid (H3PO4 by mass), preferably 130%–140%; the dodecylbenzenesulfonic acid can be C... 18 H 30 Industrial grade dodecylbenzenesulfonic acid with SO3 content ≥ 96wt%.

[0023] In the mixture of polyphosphoric acid and dodecylbenzenesulfonic acid, the mass ratio of polyphosphoric acid to dodecylbenzenesulfonic acid is 1:3 to 1:5.

[0024] The pretreatment agent, by weight, comprises the following raw material components:

[0025] Third base bitumen: 100 parts;

[0026] Medium-quality component: 20-60 parts, preferably 25-50 parts;

[0027] Lightweight component: 5-35 parts, preferably 10-30 parts.

[0028] The third matrix asphalt is Grade 70 A asphalt refined from single naphthenic crude oil, and its basic properties meet the technical requirements of the corresponding grade of "road petroleum asphalt".

[0029] The properties of the third base asphalt can be exactly the same as or different from those of the first and second base asphalts, as long as their basic properties meet the technical requirements of the corresponding grade of "road petroleum asphalt".

[0030] The intermediate component refers to the resin obtained after solvent deasphalting, and the intermediate component has the following properties: kinematic viscosity of 50 mmHg at 100°C. 2 / s~65mm 2 / s, flash point is 206℃~220℃, by mass fraction, saturated fraction accounts for 30%~42%, aromatic fraction accounts for 48%~57%, resin accounts for 8%~13%, asphaltene content is less than 2%; weight average molecular weight is 1990~2140, molecular weight distribution width is 1.6~3.7.

[0031] The light component refers to vacuum-pressed wax oil, which has the following properties: kinematic viscosity of 10 mmHg at 50°C. 2 / s~16mm 2 / s, density at 20℃ is 760~900kg / m³ 3 By mass fraction, the saturated fraction accounts for 60%–78%, the aromatic fraction accounts for 20%–32%, and the total content of resins and asphaltenes is less than 6%; the residual carbon is less than 0.15 wt%, the sulfur content is less than 0.3 wt%, the nitrogen content is less than 1 wt%, and the hydrogen-carbon molar ratio is 1.5–1.8.

[0032] The present invention also provides a method for preparing the above-mentioned hydraulic asphalt, which includes the following steps:

[0033] (1) Preparation of performance regulators;

[0034] (2) Preparation of pretreatment agent;

[0035] (3) The first base asphalt is mixed with a performance regulator and a pretreatment agent to obtain the hydraulic asphalt.

[0036] The process of preparing the performance regulator in step (1) is as follows:

[0037] The second base asphalt, heated to a fluid state, along with oil sand asphalt and a modifier, is added to a reaction vessel, stirred, and heated to the reaction temperature. After the reaction is completed, the mixture is kept at a constant temperature. After the temperature is maintained, the mixture is subjected to depressurization deep drawing to obtain a performance modifier.

[0038] The second base asphalt is heated to a fluid state at a temperature of 140℃~155℃.

[0039] The reactor is a high-pressure reactor, and the initial temperature of the reactor is adjusted to 130℃~150℃.

[0040] The stirring speed is 600-800 r / min. The heating to the reaction temperature is performed using a programmed temperature rise method, with a heating rate of 1℃-3℃ / min. The reaction temperature is 140℃-180℃, preferably 155℃-170℃. The reaction time is 3-6 hours.

[0041] The conditions for the heat preservation treatment are: heat preservation at 120℃~135℃ for 10~16h.

[0042] The termination temperature for the decompression deep drawing is 495℃~520℃ (converted to ambient pressure temperature).

[0043] The process of preparing the pretreatment agent in step (2) is as follows:

[0044] i. After heating the third base asphalt to a fluid state, mix it with the medium and light components, and then add hydrogen for hydrogenation treatment;

[0045] ii. Perform atmospheric and vacuum distillation on the material obtained in step i to obtain the final pretreated components.

[0046] In step i, the operating conditions for the hydrogenation treatment are: reaction temperature of 365℃~390℃, reaction pressure of 12MPa~22MPa, and volume hourly space velocity of 0.5~1.8h. -1 The hydrogen-to-oil volume ratio is 400–1500; the preferred operating conditions are: reaction temperature 370–390℃, reaction pressure 13–20 MPa, and volume hourly space velocity (VHSV) 0.5–1.2 h⁻¹. -1 The hydrogen-to-oil volume ratio is 500–1100.

[0047] In step i, the reactor used for the hydrogenation treatment can be at least one of a fixed-bed hydrogenation reactor, a fluidized-bed hydrogenation reactor, or a suspended-bed hydrogenation reactor, preferably a fluidized-bed hydrogenation reactor.

[0048] In step i, the catalyst used for the hydrogenation treatment can be a commercially available catalyst, such as the FF, FH, and FZC series catalysts developed by the Dalian Research Institute of Petrochemical Technology, Sinopec. The catalyst gradation method can be determined according to conventional methods, and is not particularly limited in this invention.

[0049] In step ii, the atmospheric and vacuum distillation is carried out in an atmospheric and vacuum distillation kettle. Atmospheric distillation has no special requirements. The final temperature of vacuum distillation is 465–540°C, preferably 485–520°C.

[0050] In step (3), the conditions for the blending process are: temperature of 170-185℃, blending and stirring speed of 300-500r / min, and blending and stirring time of 3-6h.

[0051] Compared with the prior art, the hydraulic asphalt and its preparation method of the present invention have the following advantages:

[0052] (1) At present, most of the production of hydraulic asphalt adopts the modification process of high molecular polymers such as SBS, which has problems such as polymer degradation and complex construction. This invention does not require any high molecular polymer modification to meet the technical requirements of No. 2 hydraulic asphalt in the product standard SH / T0799-2007 for "hydraulic petroleum asphalt".

[0053] (2) The oil sand asphalt used in this invention is a low-value-added raw material, which is not suitable for producing hydraulic asphalt. For example, Inner Mongolia oil sand asphalt has a high asphalt content, a very special form, and extremely poor comprehensive performance. When combined with naphthenic asphalt, and after modification and decompression deep drawing, its composition and structure are optimized, the softening point and low-temperature ductility of the asphalt are improved, and the oil sand asphalt has high stability and can be used to prepare durable hydraulic asphalt, thus expanding the uses of inferior raw materials and increasing their added value.

[0054] (3) The present invention also introduces a pretreatment agent, which is obtained by hydrogenation and secondary distillation of the third matrix asphalt, medium component and light component. The treatment process adjusts and optimizes the average molecular structure and molecular weight distribution of the material, and enhances the continuity of the material structure and composition. This pretreatment component has the characteristics of low viscosity, high flash point, large low temperature ductility and low temperature sensitivity, which can make up for the shortcomings of directly preparing hydraulic asphalt from matrix asphalt. Detailed Implementation

[0055] The technical solution of the present invention is further described below through embodiments, but these embodiments cannot limit the scope of protection of the present invention, and the wt% involved refers to the mass fraction.

[0056] Unless otherwise specified, the experimental methods used in the following examples are conventional methods in the art. Unless otherwise specified, the experimental materials used in the following examples were purchased from conventional biochemical reagent stores.

[0057] In the following examples and comparative examples, the base asphalt used was Qilu 70A asphalt. The properties of the base asphalt and the technical specifications of No. 2 hydraulic asphalt in the "Hydraulic Petroleum Asphalt" product standard SH / T0799-2007 are shown in Table 1. The properties of the oil sands asphalt, medium component, and light component used in the examples and comparative examples are shown in Tables 2 to 4.

[0058] Table 1 Properties of Base Asphalt and Standards for No. 2 Hydraulic Asphalt

[0059]

[0060]

[0061] Table 2 Properties of the oil sands bitumen used in the examples and comparative examples.

[0062] Carbon residue value / wt% 13.04 Carbon content / wt% 84.64 Nitrogen content / wt% 0.30 Hydrogen content / wt% 10.08 Sulfur content / wt% 2.64 Hydrogen-carbon molar ratio 1.42 Saturated fraction / wt% 11.38 Aromatic components / wt% 35.21 Gel / wt% 32.49 Asphalt / wt% 20.92 Condensation Index (CI) 0.26 Ash content / wt% 1.758 Mechanical impurities / wt% 2.59 Pour point / °C 29.0 <![CDATA[Viscosity (100 °C) / mm 2 / s]]> 1553 Flash point / °C 238 Softening point / °C 57

[0063] Table 3. Partial properties of the medium-sized components used in the examples and comparative examples.

[0064]

[0065]

[0066] Table 4. Partial Properties of Lightweight Components Used in Examples and Comparative Examples

[0067] Saturated fraction / wt% 69.21 Aromatic components wt / % 26.36 Gel / wt% 4.32 Asphalt / wt% 0.11 Carbon residue value / wt% 0.13 Sulfur content / wt% 0.24 Nitrogen content / wt% 0.18 Hydrogen-carbon molar ratio 1.8 <![CDATA[50℃ kinematic viscosity / mm 2 / s]]> 13 <![CDATA[Density at 20°C / kg / m 3 > 817

[0068] Example 1

[0069] (1) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1) and 40 parts of Inner Mongolia oil sand asphalt (properties shown in Table 2) were added to a high-pressure reactor at 130℃ and stirred. 0.2 parts of polyphosphoric acid with a phosphoric acid content (calculated as H3PO4) of 135% and 0.6 parts of dodecylbenzenesulfonic acid were slowly added to the reactor (completed within 3 min). The reactor was heated to 160℃ at a stirring speed of 600 r / min and a speed program of 2℃ / min for 4 h. After the reaction, the reactor was placed in a heat treatment vessel and kept at 120℃ for 10 h. After the heat treatment, vacuum extraction was performed to obtain vacuum residue oil with a temperature greater than 500℃, which was used as a performance regulator.

[0070] (2) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 35 parts of medium-grade components (partial properties shown in Table 3), and 20 parts of light-grade components (partial properties shown in Table 4) were reacted at a reaction temperature of 380℃, a reaction pressure of 16MPa, and a volume hourly space velocity of 0.8h. -1 Hydrogenation was carried out under a hydrogen-to-oil volume ratio of 900. The hydrogenation catalyst selected was FZC-301 catalyst developed by the Dalian Petrochemical Research Institute of Sinopec. The hydrogenation product was subjected to atmospheric and vacuum distillation, and the distillation product at a temperature greater than 500℃ was the required pretreatment agent.

[0071] (3) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 15 parts of performance modifier, and 8 parts of pretreatment agent were stirred at 180℃ for 4.5h at a stirring speed of 400r / min to obtain hydraulic asphalt A1.

[0072] Example 2

[0073] (1) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1) and 40 parts of Inner Mongolia oil sand asphalt (properties shown in Table 2) were added to a high-pressure reactor at 130℃ and stirred. 0.3 parts of polyphosphoric acid with a phosphoric acid content (calculated as H3PO4) of 130% and 0.9 parts of dodecylbenzenesulfonic acid were slowly added to the reactor (completed within 3 min). The reactor was heated to 160℃ at a stirring speed of 600 r / min and a speed program of 2℃ / min for 4 h. After the reaction, the reactor was placed in a heat treatment vessel and kept at 120℃ for 10 h. After the heat treatment, vacuum extraction was performed to obtain vacuum residue oil with a temperature greater than 510℃, which was used as a performance regulator.

[0074] (2) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 35 parts of medium-grade components (partial properties shown in Table 3), and 20 parts of light-grade components (partial properties shown in Table 4) were reacted at a reaction temperature of 380℃, a reaction pressure of 16MPa, and a volume hourly space velocity of 0.8h. -1 Hydrogenation was carried out under a hydrogen-to-oil volume ratio of 900. The hydrogenation catalyst selected was FZC-301 catalyst developed by the Dalian Petrochemical Research Institute of Sinopec. The hydrogenation product was subjected to atmospheric and vacuum distillation, and the distillation product at a temperature greater than 500℃ was the required pretreatment agent.

[0075] (3) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 15 parts of performance modifier, and 6 parts of pretreatment agent were stirred at 180℃ for 4.5h at a stirring speed of 400r / min to obtain hydraulic asphalt A2.

[0076] Example 3

[0077] (1) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1) and 35 parts of Inner Mongolia oil sand asphalt (properties shown in Table 2) were added to a high-pressure reactor at 130℃ and stirred. 0.1 parts of polyphosphoric acid with a phosphoric acid content (calculated as H3PO4) of 135% and 0.5 parts of dodecylbenzenesulfonic acid were slowly added to the reactor (completed within 3 min). The reactor was heated to 160℃ at a stirring speed of 600 r / min and a speed program of 2℃ / min for 4 h. After the reaction, the reactor was kept at 120℃ for 10 h. After the heat treatment, the reactor was subjected to vacuum extraction to obtain vacuum residue oil with a temperature greater than 500℃, which was used as a performance modifier.

[0078] (2) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 35 parts of medium-grade components (partial properties shown in Table 3), and 20 parts of light-grade components (partial properties shown in Table 4) were reacted at a reaction temperature of 380℃, a reaction pressure of 16MPa, and a volume hourly space velocity of 0.8h. -1Hydrogenation was carried out under a hydrogen-to-oil volume ratio of 900. The hydrogenation catalyst selected was FZC-301 catalyst developed by the Dalian Petrochemical Research Institute of Sinopec. The hydrogenation product was subjected to atmospheric and vacuum distillation, and the distillation product at a temperature greater than 500℃ was the required pretreatment agent.

[0079] (3) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 10 parts of performance modifier, and 8 parts of pretreatment agent were stirred at 180℃ for 5 hours at a stirring speed of 400 r / min to obtain hydraulic asphalt A3.

[0080] Example 4

[0081] (1) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1) and 40 parts of Inner Mongolia oil sand asphalt (properties shown in Table 2) were added to a high-pressure reactor at 130℃ and stirred. 0.2 parts of polyphosphoric acid with a phosphoric acid content (calculated as H3PO4) of 135% and 0.6 parts of dodecylbenzenesulfonic acid were slowly added to the reactor (completed within 3 min). The reactor was heated to 160℃ at a stirring speed of 600 r / min and a speed program of 2℃ / min for 4 h. After the reaction, the reactor was placed in a heat treatment vessel and kept at 120℃ for 10 h. After the heat treatment, vacuum extraction was performed to obtain vacuum residue oil with a temperature greater than 500℃, which was used as a performance regulator.

[0082] (2) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 30 parts of medium-grade components (partial properties shown in Table 3), and 25 parts of light-grade components (partial properties shown in Table 4) were reacted at a reaction temperature of 380℃, a reaction pressure of 16MPa, and a volume hourly space velocity of 0.8h. -1 Hydrogenation was carried out under a hydrogen-to-oil volume ratio of 900. The hydrogenation catalyst selected was FZC-301 catalyst developed by the Dalian Petrochemical Research Institute of Sinopec. The hydrogenation product was distilled under atmospheric and vacuum conditions, and the product distilled at a temperature greater than 495℃ was the required pretreatment agent.

[0083] (3) 100 parts of base asphalt heated to a fluid state (properties shown in Table 1), 15 parts of performance modifier, and 8 parts of pretreatment agent were stirred at 180℃ for 4.5h at a stirring speed of 400r / min to obtain hydraulic asphalt A4.

[0084] Comparative Example 1

[0085] The process is the same as in Example 1, except that in step (2), 100 parts of the base asphalt heated to a fluid state (properties shown in Table 1), 35 parts of the medium component (some properties shown in Table 3), and 20 parts of the light component (some properties shown in Table 4) are replaced with 155 parts of base asphalt (properties shown in Table 1). The final product is hydraulic asphalt B1.

[0086] Comparative Example 2

[0087] The process is the same as in Example 1, except that step (1) is omitted. In step (3), 100 parts of the base asphalt (properties shown in Table 1) heated to a fluid state and 8 parts of the pretreatment agent are stirred at 180°C for 4.5 hours at a stirring speed of 400 r / min. The final product is hydraulic asphalt B2.

[0088] Comparative Example 3

[0089] The process is the same as in Example 1, except that the 100 parts of the base asphalt heated to a fluid state (properties shown in Table 1) and the 40 parts of Inner Mongolia oil sand asphalt (properties shown in Table 2) in step (1) are replaced with 140 parts of Inner Mongolia oil sand asphalt (properties shown in Table 2). The final product is hydraulic asphalt B3.

[0090] Test case

[0091] Examples 1-4 and Comparative Examples 1-3 were analyzed and tested according to the technical requirements of "Hydraulic Petroleum Asphalt" (SH / T0799-2007), and the results are shown in Table 5.

[0092] Table 5. Data on hydraulic bitumen prepared in Examples 1-4 and Comparative Examples 1-3

[0093]

[0094] As can be seen from the results in Table 5, the hydraulic asphalt prepared by the method of the present invention has excellent high-temperature performance, low-temperature ductility and anti-aging performance, and all properties can meet the technical requirements of No. 2 hydraulic asphalt in the "Hydraulic Petroleum Asphalt" standard SH / T0799-2007.

Claims

1. A hydraulic asphalt, characterized in that, By weight parts, including the following raw material components: The first base pitch: 100 parts; Performance modifier: 8~25 parts; Pretreatment agent: 3~12 parts; The performance modifier, by weight, includes the following raw material components: The second base pitch: 100 parts; Oil sand pitch: 20~60 parts; Modifier: 0.1~2 parts; The properties of the oil sand bitumen include: softening point not less than 50 DEG C, flash point not less than 232 DEG C, condensation point 25 DEG C~32 DEG C, 100 DEG C viscosity 1450~1600 mm 2 / s, carbon content 84wt%~87wt%, hydrogen content 10wt%~12.4wt%, nitrogen content 0.2wt%~0.8wt%, with mass fraction, saturated fraction accounts for 10.1%~30.7%, aromatic fraction accounts for 15.6%~35.9%, gum accounts for 30.4%~45.8%, and asphaltene accounts for 10.7%~27.3%; The modifier is a mixture of polyphosphoric acid and dodecyl benzene sulfonic acid, wherein the mass ratio of polyphosphoric acid and dodecyl benzene sulfonic acid is 1:3~1:5; The pretreatment agent, by weight, includes the following raw material components: The third base pitch: 100 parts; Medium component: 20~60 parts; Light component: 5~35 parts; The medium quality component refers to a colloid obtained after solvent deasphalting, and has the following properties: a kinematic viscosity at 100℃ of 50mm 2 / s~65mm 2 / s, a flash point of 206℃~220℃, and, in terms of mass fraction, a saturates content of 30%~42%, an aromatics content of 48%~57%, a colloid content of 8%~13%, and an asphaltene content of less than 2%; a weight average molecular weight of 1990~2140, and a molecular weight distribution width of 1.6~3.

7.

2. The hydraulic asphalt according to claim 1, characterized in that By weight parts, including the following raw material components: The first base pitch: 100 parts; Performance modifier: 10~20 parts; Pretreatment agent: 5~10 parts; The performance modifier, by weight, includes the following raw material components: The second base pitch: 100 parts; Oil sand pitch: 30~50 parts; Modifier: 0.2~1.2 parts.

3. The hydraulic asphalt of claim 1, wherein, The properties of the oil sand bitumen include: softening point of 55-65℃, flash point of 235-256℃, 100℃ viscosity of 1500-1600mm 2 / s, and the asphaltene accounts for 11.3-25.2% in mass fraction.

4. The hydraulic asphalt of claim 1, wherein, The pretreatment agent, by weight, includes the following raw material components: The third base pitch: 100 parts; Medium component: 25~50 parts; Light component: 10~30 parts.

5. The hydraulic asphalt of claim 1, wherein, The first base pitch is a 70 A grade pitch refined by a single naphthenic base crude oil; and / or, the second base pitch is a 70 A grade pitch refined by a single naphthenic base crude oil.

6. The hydraulic asphalt of claim 1, wherein, The oil sand pitch is one or several of Inner Mongolia oil sand pitch, Qinghai oil sand pitch, Indonesia oil sand pitch, and Kazakhstan oil sand pitch.

7. The hydraulic asphalt according to claim 1 or 4, characterized in that, The third base pitch is a 70 A grade pitch refined by a single naphthenic base crude oil.

8. Hydraulic bitumen according to claim 6 or 4, characterized in that The light component refers to a vacuum gas oil, and the light component has the following properties: a kinematic viscosity at 50°C of 10 mm 2 / s~16 mm 2 / s, a density at 20°C of 760~900 kg / m 3 , a saturated fraction accounting for 60%~78% by mass, an aromatic fraction accounting for 20%~32% by mass, a total content of gum and asphaltene being less than 6%, a carbon residue being less than 0.15wt%, a sulfur content being less than 0.3wt%, a nitrogen content being less than 1wt%, and a hydrogen-carbon molar ratio being 1.5~1.

8.

9. A process for the production of hydraulic bitumen according to any one of claims 1 to 8, characterized in that, It includes: (1) preparing a performance modifier; (2) preparing a pretreatment agent; (3) blending the first base pitch with the performance modifier and the pretreatment agent to obtain the hydraulic pitch.

10. The method of claim 9, wherein, The process of step (1) for preparing the performance modifier is as follows: The second base pitch heated to a flow state is added to the reaction kettle with oil sand pitch and modifier, stirred and heated to a reaction temperature, and after the reaction is completed, heat preservation treatment is carried out; After the heat preservation is completed, vacuum deep drawing is carried out to obtain the performance modifier.

11. The method of claim 10, wherein, The temperature of the second base pitch heated to a flow state is 140~155℃; the initial temperature of the reaction kettle is adjusted to 130~150℃; the stirring speed is 600~800r / min; the heating to the reaction temperature is carried out by programmed heating to the reaction temperature at a heating rate of 1~3℃ / min, and the reaction temperature is 140~180℃, the reaction time is 3~6h; the heat preservation treatment is carried out at 120~135℃ for 10~16h; the termination temperature of the vacuum deep drawing is 495~520℃.

12. The method of claim 11, wherein, The reaction temperature is 155~170℃.

13. The preparation method according to claim 9, characterized in that, The process of step (2) for preparing the pretreatment agent is as follows: i. The third base pitch heated to a flow state is mixed with the medium component and the light component, and then hydrogen is added for hydrogenation treatment; ii. The material obtained in step i is subjected to atmospheric and vacuum distillation to obtain a pretreatment component.

14. The method of claim 13, wherein, In step i, the operating conditions of the hydroprocessing are as follows: the reaction temperature is 365°C to 390°C, the reaction pressure is 12 MPa to 22 MPa, the volume space velocity is 0.5 to 1.8 h -1 , and the hydrogen / oil volume ratio is 400 to 1500.

15. The preparation method according to claim 14, characterized in that, In step i, the operating conditions of the hydroprocessing are as follows: the reaction temperature is 370°C-390°C, the reaction pressure is 13 MPa-20 MPa, the volume space velocity is 0.5-1.2 h -1 , and the hydrogen / oil volume ratio is 500-1100.

16. The method of claim 13, wherein, The atmospheric and vacuum distillation is carried out in an atmospheric and vacuum distillation still, and the final temperature of the vacuum distillation is 465-540 DEG C.

17. The method of claim 16, wherein, The final temperature of the vacuum distillation is 485-520 DEG C.

18. The method of claim 9, wherein, In step (3), the blending treatment is carried out at a temperature of 170-185 DEG C, a blending stirring speed of 300-500 r / min, and a blending stirring time of 3-6 h.

Images