High-viscosity high-aromatic rubber plasticizer as well as preparation method and application thereof

Abstract

The invention provides a high-viscosity high-aromatic rubber plasticizer and a preparation method and application thereof, and relates to the technical field of petrochemical engineering, and the preparation method comprises the following steps: (a) carrying out a hydrotreating reaction on naphthenic base and / or intermediate base vacuum residue to obtain a fraction greater than 360 DEG C as treatment oil A; (b) carrying out hydrotreating reaction on the naphthenic base vacuum distillate oil to obtain a distillate with the temperature of more than 360 DEG C as treated oil B; and (c) blending the treated oil A and the treated oil B to obtain the high-viscosity high-aromatic rubber plasticizer. According to the method, the high-quality naphthenic crude oil resource is fully utilized, the raw material source is expanded, high-added-value utilization of the vacuum residue is realized, and meanwhile, the yield of the obtained target product is high; the rubber plasticizer product disclosed by the invention is high in aromatic hydrocarbon content and good in compatibility with rubber, and can endow tires with more excellent wet skid resistance in tire processing.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical industry, and in particular to a high-viscosity and high-aromatic rubber plasticizer and a preparation method and application thereof. Background Art

[0002] Aromatic rubber plasticizers are mainly used in the synthetic rubber and rubber products industries. According to the actual usage and characteristics, they are generally called rubber filler oil and rubber operating oil. For synthetic rubber manufacturers, a certain amount of mineral oil is added during the rubber production process to make it co-condense to produce oil-filled rubber. This mineral oil is generally called rubber filler oil, and the general addition amount is 20% to 30%. For rubber product processing companies, such as tire manufacturers, in order to improve the processability of the rubber, the dispersion of reinforcing agents and fillers, it is necessary to add an appropriate amount of mineral oil to the open mill, internal mixer and extruder to mix the various ingredients with the rubber evenly, so that the rubber can be processed into rubber products with practical value. This mineral oil is generally called rubber operating oil, and the general addition amount is 2% to 17%.

[0003] The operating oil used in the tire manufacturing process is generally aromatic oil and high aromatic aromatic rubber plasticizer. Aromatic oil is not environmentally friendly oil. As the environmental protection requirements of tires become increasingly stringent, the tire manufacturing industry has an increasingly strong demand for high aromatic aromatic rubber plasticizers. High viscosity high aromatic rubber plasticizers have excellent performance in the tire processing process due to their high aromatic content.

[0004] At present, the technology of producing high aromatic rubber plasticizers mostly involves solvent refining process, such as solvent deasphalting process or furfural refining process. Since the solvent refining process belongs to the separation process of physical extraction, it is easy to make the main product yield low, and there are problems such as low value of by-products and high processing costs, which ultimately lead to poor economic benefits of the entire process. At the same time, the raw materials for the production of high aromatic rubber plasticizers are currently affected by the gradual reduction of cycloalkyl raw materials, and the main raw material source cycloalkyl vacuum wax oil is also decreasing. Therefore, it is of great practical significance to broaden the raw materials of high aromatic rubber plasticizers and improve the utilization rate of cycloalkyl raw materials.

[0005] Prior art 200910236421.3 discloses a method for preparing environmentally friendly rubber oil, the steps of which are to subject cycloalkane vacuum residue oil to a propane deasphalting process to obtain deasphalted oil, and then subject the deasphalted oil to a secondary propane deasphalting process to the secondary propane deasphalting process, and the obtained heavy deasphalted oil is then mixed with cycloalkane oil to obtain environmentally friendly rubber oil (rubber plasticizer); however, the product yield obtained by this method is low and the process flow is complicated. Prior art 202110903483.6 discloses a method for preparing a high-aromatic and high-viscosity environmentally friendly rubber plasticizer, which is to sequentially subject cycloalkane vacuum residue oil to hydrogenation refining and hydrodecondensation, and the obtained hydrogenated liquid product is then subjected to vacuum distillation to obtain a fraction with a boiling point ≥360°C, which is a high-aromatic and high-viscosity environmentally friendly rubber plasticizer; the preparation method adopts a combined process different from the traditional two-stage solvent process, which can solve the technical problems of low yield of the traditional two-stage solvent extraction process and the contradiction between the content of condensed ring aromatics and the content of aromatic carbon; however, the yield of the high-aromatic and high-viscosity environmentally friendly rubber plasticizer prepared by this method is not high, only 60% to 70%.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] One of the purposes of the present invention is to provide a method for preparing a high-viscosity and high-aromatic rubber plasticizer, thereby realizing high value-added utilization of vacuum residue oil. The high-viscosity and high-aromatic rubber plasticizer can be prepared by a combined process of hydrogenation and blending, and the yield of the obtained target product is high, thereby making full use of high-quality cycloalkyl crude oil resources.

[0008] The second object of the present invention is to provide a high-viscosity high-aromatic rubber plasticizer with high aromatic content and good compatibility with rubber, which can give the tire better anti-skid performance during tire processing.

[0009] The third object of the present invention is to provide an application of a high-viscosity and high-aromatic rubber plasticizer, which is beneficial to imparting excellent wet-skid resistance to tires.

[0010] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0011] In a first aspect, a method for preparing a high-viscosity high-aromatic rubber plasticizer comprises the following steps:

[0012] (a) subjecting cycloalkyl and / or intermediate-based vacuum residue oil to a hydroprocessing reaction to obtain a fraction greater than 360° C. as a treated oil A;

[0013] (b) subjecting the cycloalkyl vacuum distillate oil to a hydroprocessing reaction to obtain a fraction greater than 360° C. as a treated oil B;

[0014] (c) The treated oil A is blended with the treated oil B to obtain a high-viscosity and high-aromatic rubber plasticizer.

[0015] Furthermore, in step (a), the kinematic viscosity of the cycloalkyl and / or intermediate-based vacuum residue at 100°C is ≥ 200 mm 2 / s.

[0016] Furthermore, in step (a), the temperature of the hydrotreatment reaction is 300°C to 420°C.

[0017] Furthermore, in step (a), the volume ratio of hydrogen to vacuum residue in the hydrotreatment reaction is (600-1500):1, and the volume space velocity is 0.2h -1 ~1.5h -1 , hydrogen partial pressure is greater than 10MPa.

[0018] Furthermore, in step (b), the 100°C kinematic viscosity of the cycloalkane vacuum distillate oil is ≥4 mm 2 / s, aromatic carbon rate ≥18%.

[0019] Furthermore, in step (b), the temperature of the hydrotreatment reaction is 280°C to 380°C.

[0020] Furthermore, in step (b), the volume ratio of hydrogen to vacuum distillate in the hydroprocessing reaction is (600-1500):1, and the volume space velocity is 0.2h -1 ~1.5h -1 , hydrogen partial pressure is greater than 8MPa.

[0021] Furthermore, in step (c), the mass ratio of the treated oil A to the treated oil B is 1:9 to 9:1;

[0022] The blending temperature is 40° C. to 200° C., and the blending time is not less than 10 minutes.

[0023] In a second aspect, a high-viscosity and high-aromatic rubber plasticizer is prepared by any of the preparation methods described above;

[0024] The C of the high viscosity high aromatic rubber plasticizer A Value ≥ 25%, 100℃ kinematic viscosity ≥ 30mm 2 / s, flash point ≥230℃, aniline point ≤75℃, BaP content ≤1mg / kg, PAHs content ≤10mg / kg.

[0025] A third aspect is a use of the rubber plasticizer described above in tire processing.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] The preparation method of the high-viscosity and high-aromatic rubber plasticizer provided by the present invention introduces cycloalkyl and / or intermediate-base vacuum residue oil as one of the raw materials of the rubber plasticizer, thereby reducing the dependence on cycloalkyl vacuum wax oil. The high-viscosity and high-aromatic rubber plasticizer is successfully prepared through a shallow hydrogenation process and a blending combination process. The obtained target product has a high yield, fully utilizes high-quality cycloalkyl crude oil resources, expands the source of raw materials, and realizes high added value utilization of vacuum residue oil.

[0028] The high-viscosity and high-aromatic rubber plasticizer provided by the present invention is non-toxic, non-carcinogenic, and has a high aromatic content, which meets the limited substance requirements for environmentally friendly operating oil in the "Green Design Product Evaluation Technical Specifications for Automobile Tires" issued by the China Petroleum and Chemical Industry Federation and the China Rubber Industry Association (i.e., BaP content ≤ 1 mg / kg, PAHs content ≤ 10 mg / kg); the C A The value can reach more than 25%, and the aromatic content is high, so it has good compatibility with rubber and can give the tire better anti-skid performance during tire processing.

[0029] The application of the high-viscosity and high-aromatic rubber plasticizer provided by the present invention is beneficial to imparting excellent anti-skid performance to the tire. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] According to a first aspect of the present invention, there is provided a method for preparing a high-viscosity high-aromatic rubber plasticizer, comprising the following steps:

[0032] (a) subjecting cycloalkyl and / or intermediate-based vacuum residue oil to a hydroprocessing reaction to obtain a fraction greater than 360° C. as a treated oil A;

[0033] (b) subjecting the cycloalkyl vacuum distillate oil to a hydroprocessing reaction to obtain a fraction greater than 360° C. as a treated oil B;

[0034] (c) The treated oil A is blended with the treated oil B to obtain a high-viscosity and high-aromatic rubber plasticizer.

[0035] In the present invention, cycloalkyl and / or intermediate vacuum residue oil is introduced as the raw material of rubber plasticizer, which can reduce the dependence on cycloalkyl vacuum wax oil. At the same time, a high-viscosity and high-aromatic rubber plasticizer is successfully prepared through a shallow hydrogenation process and a blending combination process.

[0036] The preparation method of the present invention not only has a high yield of the target product, but also fully utilizes high-quality cycloalkyl crude oil resources, expands the source of raw materials, and realizes high added value utilization of vacuum residue oil.

[0037] In a preferred embodiment, in step (a), the kinematic viscosity of the cycloalkyl and / or intermediate vacuum residue at 100°C is ≥ 200 mm 2 / s, and the cycloalkane vacuum residue oil may be the cycloalkane vacuum residue oil sold by CNOOC, such as 200# asphalt product.

[0038] It should be noted that in step (a), the temperature of the hydrotreatment reaction can be 300°C to 420°C, and its typical but non-limiting temperatures are, for example, 300°C, 320°C, 340°C, 360°C, 380°C, 400°C, and 420°C; at the same time, the volume ratio of hydrogen to vacuum residue can be (600-1500):1, and its typical but non-limiting volume ratio is, for example, 600:1, 700:1, 800:1, 900:1, 1000:1, 1100:1, 1200:1, 1300:1, 1400:1, and 1500:1; the volume space velocity of the hydrotreatment reaction can be 0.2h -1 ~1.5h -1 , with a typical but non-limiting volumetric space velocity of, for example, 0.2 h -1 、0.3h -1 、0.4h -1 , 0.5h -1 , 0.6h -1 、0.7h -1 、0.8h -1 , 0.9h -1 , 1.0h -1 , 1.1h -1 , 1.2h -1 , 1.3h -1 , 1.4h -1 , 1.5h -1 , the hydrogen partial pressure can be greater than 10MPa.

[0039] In the present invention, in step (a), the catalyst used in the hydroprocessing reaction can be a residue oil fixed bed hydrogenation catalyst system, which includes but is not limited to a hydrogenation protective agent, a hydrodemetallization catalyst and a hydrorefining catalyst; wherein the hydrogenation protective agent and the hydrodemetallization catalyst can be a commonly used residue oil fixed bed hydrogenation catalyst, and the hydrorefining catalyst can be a molybdenum-nickel type hydrogenation catalyst, a tungsten-nickel type hydrogenation catalyst, a molybdenum-cobalt type hydrogenation catalyst and / or a molybdenum-tungsten-nickel type hydrogenation catalyst; it should be noted that the three catalyst grading schemes in the residue oil fixed bed hydrogenation catalyst system can be designed according to the grading schemes of the first three types of catalysts in the existing commonly used residue oil fixed bed hydrogenation unit.

[0040] In a preferred embodiment, in step (b), the kinematic viscosity of the cycloalkyl vacuum distillate oil at 100°C is ≥4 mm 2 / s,C A The aromatic carbon content is ≥18%. The cycloalkane vacuum distillate oil can be the cycloalkane vacuum distillate oil sold by CNOOC, such as Suizhong 36-1 vacuum distillate oil product.

[0041] It should be noted that in step (b), the temperature of the hydrotreatment reaction can be 280°C to 380°C, and its typical but non-limiting temperatures are, for example, 280°C, 290°C, 300°C, 320°C, 340°C, 360°C, and 380°C; at the same time, the volume ratio of hydrogen to vacuum distillate oil can be (600-1500):1, and its typical but non-limiting volume ratio is, for example, 600:1, 700:1, 800:1, 900:1, 1000:1, 1100:1, 1200:1, 1300:1, 1400:1, and 1500:1; the volume space velocity of the hydrotreatment reaction can be 0.2h -1 ~1.5h -1 , with a typical but non-limiting volumetric space velocity of, for example, 0.2 h -1 、0.3h -1 、0.4h -1 , 0.5h -1 , 0.6h -1 、0.7h -1 、0.8h -1 , 0.9h -1 , 1.0h -1 , 1.1h -1 , 1.2h -1 , 1.3h -1 , 1.4h -1 , 1.5h -1 , the hydrogen partial pressure can be greater than 8MPa.

[0042] In the present invention, in step (b), the catalyst used in the hydroprocessing reaction may be a hydrorefining catalyst, which may be a molybdenum-nickel type hydrogenation catalyst, a tungsten-nickel type hydrogenation catalyst, a molybdenum-cobalt type hydrogenation catalyst and / or a molybdenum-tungsten-nickel type hydrogenation catalyst.

[0043] In a preferred embodiment, in the blending of step (c), the mixing mass ratio of the treated oil A to the treated oil B can be 1:9-9:1, and its typical but non-limiting mass ratio is, for example, 1:9, 1:8, 1:7, 1:6, 1:5, 1:4, 1:3, 1:2, 1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1; the mixing temperature can be 40°C-200°C, and its typical but non-limiting temperature is, for example, 40°C, 60°C, 80°C, 100°C, 120°C, 140°C, 160°C, 180°C, 200°C; and the mixing time is not less than 10 min.

[0044] According to a second aspect of the present invention, there is provided a high-viscosity and high-aromatic rubber plasticizer, which is prepared by any of the preparation methods described above.

[0045] In the present invention, the C of the high viscosity high aromatic rubber plasticizer is A Value ≥ 25%, 100℃ kinematic viscosity ≥ 30mm 2 / s, flash point ≥230℃, aniline point ≤75℃, BaP content ≤1mg / kg, PAHs content ≤10mg / kg.

[0046] The high-viscosity and high-aromatic rubber plasticizer provided by the present invention is non-toxic, non-carcinogenic, and has a high aromatic content, which meets the limited substance requirements for environmentally friendly operating oil in the "Green Design Product Evaluation Technical Specifications for Automobile Tires" issued by the China Petroleum and Chemical Industry Federation and the China Rubber Industry Association (i.e., BaP content ≤ 1 mg / kg, PAHs content ≤ 10 mg / kg); the C A The value can reach more than 25%, and the aromatic content is high, so it has good compatibility with rubber and can give the tire better anti-skid performance during tire processing.

[0047] According to a third aspect of the present invention, there is provided a use of the rubber plasticizer described above in tire processing.

[0048] The application of the high-viscosity and high-aromatic rubber plasticizer provided by the present invention is beneficial to imparting excellent anti-skid performance to the tire.

[0049] The present invention is further described below by way of examples. Unless otherwise specified, the materials in the examples are prepared according to existing methods or directly purchased from the market.

[0050] Example 1

[0051] A method for preparing a high-viscosity high-aromatic rubber plasticizer comprises the following steps:

[0052] (1) Using CNOOC cycloalkane vacuum residue as raw material, the hydrotreating reaction was carried out in a hydrotreating pilot plant at a reaction temperature of 350°C, a hydrogen-to-oil volume ratio of 1000:1, and a volume space velocity of 0.3 h -1 , the hydrogen partial pressure is 15 MPa, and the fraction greater than 360°C is obtained as the treated oil A1;

[0053] (2) Using CNOOC Suizhong 36-1 minus three-line distillate as raw material, the hydrotreating reaction was carried out in a hydrotreating pilot plant with a reaction temperature of 300°C, a hydrogen-to-oil volume ratio of 1000:1, and a volume space velocity of 0.5 h -1 , the hydrogen partial pressure is 15 MPa, and the fraction greater than 360°C is obtained as the treated oil B1;

[0054] (3) The treated oil A1 and the treated oil B1 were mixed at a mass ratio of 1:1 at 80° C. for 20 min to obtain a high-viscosity and high-aromatic rubber plasticizer A1B1.

[0055] The specific properties of the rubber plasticizer A1B1 obtained in this example are shown in Table 1.

[0056] Example 2

[0057] A method for preparing a high-viscosity high-aromatic rubber plasticizer comprises the following steps:

[0058] (1) Using CNOOC cycloalkane vacuum residue as raw material, the hydrotreating reaction was carried out in a hydrotreating pilot plant at a reaction temperature of 360°C, a hydrogen-to-oil volume ratio of 1000:1, and a volume space velocity of 0.25 h -1 , the hydrogen partial pressure is 15 MPa, and the fraction greater than 360°C is obtained as the treated oil A2;

[0059] (2) Using CNOOC Suizhong 36-1 minus three-line distillate as raw material, the hydrotreating reaction was carried out in a hydrotreating pilot plant with a reaction temperature of 305°C, a hydrogen-to-oil volume ratio of 1000:1, and a volume space velocity of 0.6 h -1 , the hydrogen partial pressure is 15 MPa, and the fraction greater than 360°C is obtained as the treated oil B2;

[0060] (3) The treated oil A2 and the treated oil B2 were mixed at a mass ratio of 3:7 at 70° C. for 15 min to obtain a high-viscosity and high-aromatic rubber plasticizer A2B2.

[0061] The specific properties of the rubber plasticizer A2B2 obtained in this example are shown in Table 1.

[0062] Example 3

[0063] A method for preparing a high-viscosity high-aromatic rubber plasticizer comprises the following steps:

[0064] (1) Using CNOOC cycloalkane vacuum residue as raw material, the hydrotreating reaction was carried out in a hydrotreating pilot plant at a reaction temperature of 340°C, a hydrogen-to-oil volume ratio of 1000:1, and a volume space velocity of 0.25 h -1 , the hydrogen partial pressure is 15 MPa, and the fraction greater than 360°C is obtained as the treated oil A3;

[0065] (2) Using CNOOC Suizhong 36-1 minus three-line distillate as raw material, the hydrotreating reaction was carried out in a hydrotreating pilot plant with a reaction temperature of 315°C, a hydrogen-to-oil volume ratio of 1000:1, and a volume space velocity of 0.5 h -1 , the hydrogen partial pressure is 15 MPa, and the fraction greater than 360°C is obtained as the treated oil B3;

[0066] (3) The treated oil A3 and the treated oil B3 were mixed at a mass ratio of 9:1 at 100° C. for 30 min to obtain a high-viscosity and high-aromatic rubber plasticizer A3B3.

[0067] The specific properties of the rubber plasticizer A3B3 obtained in this example are shown in Table 1.

[0068] Comparative Example 1

[0069] The difference between this comparative example and Example 1 is that in this comparative example, no hydrotreatment reaction is performed in step (1);

[0070] The remaining steps and process parameters are the same as those in Example 1.

[0071] Compared with Example 1, the defect of this comparative example is that the vacuum residue contains a large amount of polycyclic aromatic hydrocarbons, resulting in that the BaP content and PAHs content of the final product do not meet the index requirements of aromatic rubber plasticizers.

[0072] Comparative Example 2

[0073] The difference between this comparative example and Example 1 is that in this comparative example, the fraction with a temperature greater than 330° C. is obtained by the hydrotreatment reaction in step (2) as the treated oil A;

[0074] The remaining steps and process parameters are the same as those in Example 1.

[0075] Compared with Example 1, the defect of this comparative example is that the fraction above 330°C still contains a large amount of light components, and the flash point of the obtained product after blending is reduced to 196°C, which does not meet the indicators and user requirements.

[0076] Comparative Example 3

[0077] The difference between this comparative example and Example 1 is that in this comparative example, no hydrotreatment reaction is performed in step (2);

[0078] The remaining steps and process parameters are the same as those in Example 1.

[0079] Compared with Example 1, the defect of this comparative example is that the vacuum distillate oil contains a large amount of polycyclic aromatic hydrocarbons. After the blending process, the BaP content and PAHs content of the obtained product do not meet the index requirements of aromatic rubber plasticizers.

[0080] Comparative Example 4

[0081] The difference between this comparative example and Example 1 is that in this comparative example, the fraction with a temperature greater than 330° C. is obtained by the hydrotreatment reaction in step (2) as the treated oil B;

[0082] The remaining steps and process parameters are the same as those in Example 1.

[0083] Compared with Example 1, the defect of this comparative example is that the fraction above 330°C still contains a large amount of light components, and the flash point of the obtained product after blending is reduced to 198°C, which does not meet the indicators and user requirements.

[0084] Table 1

[0085]

[0086] As shown in Table 1, the preparation method of the present invention can obtain a high-yield high-viscosity high-aromatic rubber plasticizer, and its C A The value is greater than 25%, and the kinematic viscosity at 100℃ is greater than 30mm 2 / s, it has excellent processing performance in the tire processing process and is a non-toxic green product, which is beneficial to improving the overall production economic benefits.

[0087] In summary, the present invention makes full use of high-quality cycloalkyl crude oil resources, expands the source of raw materials, realizes high value-added utilization of vacuum residue oil, and at the same time, the yield of the obtained target product is high; the rubber plasticizer product of the present invention has a high aromatic content and good compatibility with rubber, and can give the tire a more superior anti-skid performance during tire processing.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a high-viscosity high-aromatic rubber plasticizer, characterized in that: The following steps are involved: (a) subjecting cycloalkyl and / or intermediate-based vacuum residue oil to a hydroprocessing reaction to obtain a fraction greater than 360° C. as a treated oil A; (b) subjecting the cycloalkyl vacuum distillate oil to a hydroprocessing reaction to obtain a fraction greater than 360° C. as a treated oil B; (c) The treated oil A is blended with the treated oil B to obtain a high-viscosity and high-aromatic rubber plasticizer.

2. The preparation method according to claim 1, characterized in that: In step (a), the kinematic viscosity of the cycloalkyl and / or intermediate vacuum residue at 100°C is ≥ 200 mm 2 / s.

3. The preparation method according to claim 2, characterized in that: In step (a), the temperature of the hydrotreatment reaction is 300°C to 420°C.

4. The preparation method according to claim 3, characterized in that: In step (a), the volume ratio of hydrogen to vacuum residue in the hydroprocessing reaction is (600-1500):1, and the volume space velocity is 0.2h -1 ~1.5h -1 , hydrogen partial pressure is greater than 10MPa.

5. The preparation method according to claim 1, characterized in that: In step (b), the 100°C kinematic viscosity of the cycloalkane vacuum distillate oil is ≥4 mm 2 / s, aromatic carbon rate ≥18%.

6. The preparation method according to claim 5, characterized in that: In step (b), the temperature of the hydrotreatment reaction is 280°C to 380°C.

7. The preparation method according to claim 6, characterized in that: In step (b), the volume ratio of hydrogen to vacuum distillate in the hydroprocessing reaction is (600-1500):1, and the volume space velocity is 0.2h -1 ~1.5h -1 , hydrogen partial pressure is greater than 8MPa.

8. The preparation method according to any one of claims 1 to 7, characterized in that: In step (c), the mass ratio of the treated oil A to the treated oil B is 1:9 to 9:1; The blending temperature is 40° C. to 200° C., and the blending time is not less than 10 minutes.

9. A high viscosity high aromatic rubber plasticizer, characterized in that: It is prepared by the preparation method according to any one of claims 1 to 8; The C of the high viscosity high aromatic rubber plasticizer A Value ≥ 25%, 100℃ kinematic viscosity ≥ 30mm 2 / s, flash point ≥230℃, aniline point ≤75℃, BaP content ≤1mg / kg, PAHs content ≤10mg / kg.

10. Use of the rubber plasticizer according to claim 9 in tire processing.

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