Method for preparing heavy-duty road asphalt and heavy-duty road asphalt

Abstract

The invention relates to the field of road asphalt, in particular to a method for preparing heavy-duty road asphalt and the heavy-duty road asphalt. The method for preparing the heavy traffic road asphalt provided by the invention comprises the following steps: S1, performing propane deasphalting treatment on crude oil to obtain deoiled asphalt; and carrying out furfural refining treatment on the vacuum fourth fraction oil to obtain heavy extract oil, s2, blending the deoiled asphalt and the heavy extract oil to obtain the heavy traffic road asphalt, in the step S2, the total weight of the deoiled asphalt and the heavy extract oil which are subjected to blending treatment is 100 parts by weight, the deoiled asphalt accounts for 70-90 parts by weight, and the heavy extract oil accounts for 10-30 parts by weight. According to the method provided by the invention, the deoiled asphalt and the heavy extract oil are blended according to a specific proportion, so that the heavy traffic road asphalt of which the quality meets the AH-70 or AH-90 specification requirements of GB / T15180-2010 can be produced.

Description

Technical Field

[0001] The invention relates to the field of road asphalt, and in particular to a method for preparing heavy traffic road asphalt and the heavy traffic road asphalt. Background Art

[0002] Petroleum asphalt is an important material that is indispensable for national economic construction, especially it is an indispensable material for building roads and highways, the lifeline of the modern economy. The propane deasphalting unit is a device in the lubricant production process, which is mainly used to produce light deasphalted oil and heavy deasphalted oil. Its byproduct asphalt cannot be directly shipped as road asphalt due to its high hardness and poor low-temperature performance. It is mainly used to prepare building asphalt or sell as fuel oil, and the economic benefits are not high. Other refining byproducts that can also be used as heavy fuel oil include furfural extraction oil and catalytic oil slurry. Since fuel oil is shipped out of the factory, consumption tax must be paid per ton, resulting in a huge price difference between fuel oil and heavy road asphalt. At the same time, due to the increasing pressure on environmental protection, the poor sales of fuel oil may cause serious storage congestion, which directly affects the normal operation of the production equipment.

[0003] CN112980485 discloses a method for preparing asphalt using propane, which can effectively separate deasphalted oil and deoiled asphalt and improve the performance of deoiled asphalt. The disadvantage of this method is that an alkyl aromatic sulfonic acid dispersant needs to be added to the deoiled asphalt mixture to improve the asphalt performance, the process is complicated, the cost is high, and the prepared product is an asphalt mixture. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of low utilization rate and poor economic benefit of de-oiled asphalt in the prior art, and to provide a method for preparing heavy traffic road asphalt and heavy traffic road asphalt.

[0005] In order to achieve the above object, the present invention provides a method for preparing heavy traffic road asphalt, comprising the following steps:

[0006] S1: subjecting the crude oil to propane deasphalting treatment to obtain deoiled asphalt; and

[0007] The fourth-line distillate oil is subjected to furfural refining treatment to obtain heavy-extracted oil;

[0008] S2: blending the deoiled asphalt with the re-extracted oil to obtain re-traffic road asphalt;

[0009] In step S1, the crude oil comprises an intermediate base crude oil and a paraffin base crude oil, and relative to 100 parts by weight of the crude oil, the intermediate base crude oil accounts for 79-99 parts by weight, and the paraffin base crude oil accounts for 1-30 parts by weight;

[0010] In step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is not more than 1.8wt%, and the needle penetration of the deoiled asphalt is 251 / 10mm-451 / 10mm; and the conditions of the furfural refining treatment are controlled so that the wax content of the heavy-extracted oil is not more than 3.5wt%, the saturated hydrocarbon content of the heavy-extracted oil is not more than 10wt%, and the aromatic hydrocarbon content is not less than 60wt%;

[0011] In step S2, the total weight of the de-oiled asphalt and the re-extracted oil to be blended is 100 parts by weight, wherein the de-oiled asphalt accounts for 70-90 parts by weight and the re-extracted oil accounts for 10-30 parts by weight.

[0012] Preferably, in step S1, the furfural refining treatment step comprises:

[0013] S11: extracting the reduced fourth-line distillate oil and the furfural in an extraction tower, wherein the reduced fourth-line distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the feed weight ratio of the reduced fourth-line distillate oil to the furfural is 1:(1.8-2.8);

[0014] S12: After the extracted oil produced at the bottom of the extraction tower is subjected to sedimentation treatment, the lower layer liquid is separated to obtain heavy extracted oil.

[0015] Preferably, in step S11, the top temperature of the extraction tower is 123°C-127°C, the bottom temperature is 88°C-92°C, and the bottom pressure is 0.5MPa-0.9MPa.

[0016] Preferably, in step S12, the temperature of the sedimentation treatment is 40°C-50°C, the pressure is 0.3MPa-0.8MPa, and the sedimentation time is 15min-30min.

[0017] Preferably, in step S2, the total weight of the deoiled asphalt and the re-extracted oil to be blended is 100 parts by weight, of which the deoiled asphalt accounts for 75-90 parts by weight and the re-extracted oil accounts for 10-25 parts by weight.

[0018] Preferably, the total weight of the de-oiled asphalt and the re-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the de-oiled asphalt accounts for 77-80 parts by weight and the re-extracted oil accounts for 20-23 parts by weight.

[0019] Preferably, in step S1, the conditions of the propane deasphalting treatment are controlled so that the softening point of the deoiled asphalt is 50°C-65°C.

[0020] Preferably, in step S1, the conditions of the propane deasphalting treatment are controlled so that the flash point of the deoiled asphalt is not less than 315°C.

[0021] Preferably, in step S1, the conditions of the furfural refining treatment are controlled so that the flash point of the re-extracted oil is not less than 240°C.

[0022] Preferably, in step S1, the conditions of the furfural refining treatment are controlled so that the pour point of the re-extracted oil is not higher than 25°C.

[0023] Preferably, in step S1, the conditions of the furfural refining treatment are controlled so that the initial boiling point of the heavy-extracted oil is not lower than 325°C.

[0024] Preferably, in step S2, the temperature of the blending treatment is 120°C-140°C, and the blending time is 3min-10min.

[0025] Preferably, the intermediate base crude oil is selected from at least one of Angola Plutoni crude oil, Kaisarge crude oil, Saudi Arabian medium crude oil, Mahila crude oil, Hango crude oil and Oman crude oil.

[0026] Preferably, the paraffin-based crude oil is selected from at least one of Russian mixed crude oil ESPO and Angola Cabinda crude oil.

[0027] A second aspect of the present invention provides a heavy traffic road asphalt prepared by any one of the aforementioned methods.

[0028] The method provided by the present invention comprises the following steps: blending deoiled asphalt which is a byproduct of propane deasphalting treatment and heavy extracted oil which is a byproduct of furfural refining treatment according to a specific ratio of the present invention, so as to produce heavy traffic road asphalt whose quality meets the requirements of AH-70 or AH-90 specifications of GB / T15180-2010, thereby solving the problems of low utilization rate and low economic benefit of byproducts generated by processing inferior crude oil and heavy fuel oil, increasing the output of high-value heavy traffic road asphalt, and having good application prospects. DETAILED DESCRIPTION

[0029] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0030] As mentioned above, the first aspect of the present invention provides a method for preparing heavy traffic road asphalt and heavy traffic road asphalt.

[0031] In order to achieve the above object, the present invention provides a method for preparing heavy traffic road asphalt, comprising the following steps:

[0032] S1: subjecting the crude oil to propane deasphalting treatment to obtain deoiled asphalt; and

[0033] The fourth-line distillate oil is subjected to furfural refining treatment to obtain heavy-extracted oil;

[0034] S2: blending the deoiled asphalt with the re-extracted oil to obtain re-traffic road asphalt;

[0035] In step S1, the crude oil comprises an intermediate base crude oil and a paraffin base crude oil, and relative to 100 parts by weight of the crude oil, the intermediate base crude oil accounts for 70-99 parts by weight, and the paraffin base crude oil accounts for 1-30 parts by weight;

[0036] In step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is not more than 1.8wt%, and the needle penetration of the deoiled asphalt is 251 / 10mm-451 / 10mm; and the conditions of the furfural refining treatment are controlled so that the wax content of the heavy-extracted oil is not more than 3.5wt%, the saturated hydrocarbon content of the heavy-extracted oil is not more than 10wt%, and the aromatic hydrocarbon content is not less than 60wt%;

[0037] In step S2, the total weight of the de-oiled asphalt and the re-extracted oil to be blended is 100 parts by weight, wherein the de-oiled asphalt accounts for 70-90 parts by weight and the re-extracted oil accounts for 10-30 parts by weight.

[0038] It should be noted that in the present invention, the needle penetration is measured under the conditions of 25°C, within 5s and 100 load.

[0039] The method provided by the present invention comprises the following steps: blending deoiled asphalt, a byproduct of propane deasphalting treatment, and heavy-extracted oil, a byproduct of furfural refining treatment, according to a specific ratio of the present invention, so as to produce heavy-duty road asphalt with quality meeting the requirements of AH-70 or AH-90 specifications of GB / T15180-2010. The method is suitable for refineries equipped with propane deasphalting devices and furfural devices, solves the problems of low utilization rate and low economic benefits of byproducts generated by processing inferior crude oil and heavy fuel oil, increases the output of high-value heavy-duty road asphalt, and has good application prospects.

[0040] According to some preferred embodiments of the present invention, in step S1, the furfural refining process comprises:

[0041] S11: extracting the reduced fourth-line distillate oil and the furfural in an extraction tower, wherein the reduced fourth-line distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the feed weight ratio of the reduced fourth-line distillate oil to the furfural is 1:(1.8-2.8);

[0042] S12: After the extracted oil produced at the bottom of the extraction tower is subjected to sedimentation treatment, the lower layer liquid is separated to obtain heavy extracted oil.

[0043] The re-extracted oil obtained under the preferred conditions can be blended with de-oiled asphalt to produce heavy traffic asphalt, so as to produce heavy traffic asphalt with better performance.

[0044] According to some particularly preferred embodiments of the present invention, in step S11, the top temperature of the extraction tower is 123°C-127°C, the bottom temperature is 88°C-92°C, and the bottom pressure is 0.5MPa-0.9MPa.

[0045] According to some particularly preferred embodiments of the present invention, in step S12, the temperature of the sedimentation treatment is 40°C-50°C, the pressure is 0.3MPa-0.8MPa, and the sedimentation time is 15min-30min.

[0046] According to some preferred embodiments of the present invention, in step S2, the total weight of the deoiled asphalt and the re-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the deoiled asphalt accounts for 75-90 parts by weight and the re-extracted oil accounts for 10-25 parts by weight.

[0047] More preferably, the total weight of the de-oiled asphalt and the re-extracted oil to be blended is 100 parts by weight, wherein the de-oiled asphalt accounts for 77-80 parts by weight and the re-extracted oil accounts for 20-23 parts by weight. Under this preferred condition, heavy traffic road asphalt that meets the AH-90 specification requirements of GB / T15180-2010 can be produced.

[0048] According to some preferred embodiments of the present invention, in step S1, the conditions of the propane deasphalting treatment are controlled so that the softening point of the deoiled asphalt is 50°C-65°C.

[0049] According to some preferred embodiments of the present invention, in step S1, the conditions of the propane deasphalting treatment are controlled so that the flash point of the deoiled asphalt is not less than 315° C. Under this preferred condition, the heavy traffic road asphalt obtained has better performance.

[0050] According to some preferred embodiments of the present invention, in step S1, the conditions of the furfural refining treatment are controlled so that the flash point of the re-extracted oil is not less than 240°C.

[0051] According to some preferred embodiments of the present invention, in step S1, the conditions of the furfural refining treatment are controlled so that the pour point of the re-extracted oil is not higher than 25°C.

[0052] According to some preferred embodiments of the present invention, in step S1, the conditions of the furfural refining treatment are controlled so that the initial distillation point of the heavy-extracted oil is not lower than 325°C.

[0053] According to some preferred embodiments of the present invention, in step S2, the temperature of the blending treatment is 120°C-140°C, and the blending time is 3min-10min.

[0054] According to some preferred embodiments of the present invention, the intermediate base crude oil is selected from at least one of Angola Plutoni crude oil, Kaisarge crude oil, Saudi Arabian medium crude oil, Mahila crude oil, Hango crude oil and Oman crude oil.

[0055] According to some preferred embodiments of the present invention, the paraffin-based crude oil is selected from at least one of Russian mixed crude oil ESPO and Angola Cabinda crude oil.

[0056] A second aspect of the present invention provides a heavy traffic road asphalt prepared by any one of the aforementioned methods, and the heavy traffic road asphalt meets the requirements of AH-70 or AH-90 of GB / T15180-2010.

[0057] The present invention will be described in detail below by way of examples. In the following examples, each 1 part by weight represents 1 kg.

[0058] Intermediate base crude oil:

[0059] Angola Plutoni crude oil, Oman crude oil, Saudi Arabian medium crude oil.

[0060] Paraffinic crude oil:

[0061] Russian blended crude oil ESPO, Angola Cabinda crude oil;

[0062] The above crude oil was purchased by China International Petroleum & Chemical Corporation.

[0063] Furfural was purchased from Pingquan Fengsheng Chemical Co., Ltd. with a purity of >98.5%.

[0064] Crude oil A: The total weight of crude oil A is 100 parts by weight, wherein the crude oil A is a mixture of 25 parts by weight of Angola Plutoni crude oil, 25 parts by weight of Oman crude oil, 25 parts by weight of Saudi Arabian medium crude oil, and 25 parts by weight of Russian mixed crude oil ESPO.

[0065] Crude oil B: The total weight of crude oil B is 100 parts by weight, wherein the crude oil B is mixed with 75 parts by weight of sand and 25 parts by weight of Cabinda.

[0066] Example 1

[0067] S1: subjecting the crude oil to propane deasphalting treatment to obtain deoiled asphalt; and

[0068] The fourth-line distillate oil is subjected to furfural refining treatment to obtain heavy-extracted oil;

[0069] S2: blending the deoiled asphalt with the re-extracted oil to obtain re-traffic road asphalt;

[0070] In step S1, the crude oil is crude oil A;

[0071] In step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is 1.7 wt%; and the conditions of the furfural refining treatment are controlled so that the wax content of the heavy-extracted oil is 3.47 wt%, the saturated hydrocarbon content of the heavy-extracted oil is 7.46 wt%, and the aromatic hydrocarbon content is 65.49 wt%;

[0072] In step S2, the total weight of the de-oiled asphalt and the re-extracted oil to be blended is 100 parts by weight, wherein the de-oiled asphalt accounts for 82 parts by weight and the re-extracted oil accounts for 18 parts by weight.

[0073] In step S1, the furfural refining process comprises:

[0074] S11: extracting the reduced fourth-line distillate oil and the furfural in an extraction tower, wherein the reduced fourth-line distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the feed weight ratio of the reduced fourth-line distillate oil to the furfural is 1:2;

[0075] S12: subjecting the extracted oil produced at the bottom of the extraction tower to sedimentation treatment, and separating the lower layer liquid to obtain heavy extracted oil;

[0076] Wherein, in step S11, the top temperature of the extraction tower is 125°C, the bottom temperature is 90°C, and the bottom pressure is 0.7MPa;

[0077] In step S12, the temperature of the sedimentation treatment is 45°C, the pressure is 0.5MPa, and the sedimentation time is 20min;

[0078] In step S2, the temperature of the blending treatment is 130° C. and the blending time is 5 min.

[0079] Specifically, various parameters in the preparation process are shown in Table 1 below, and performance parameters of the prepared heavy traffic road asphalt are shown in Table 2 below.

[0080] Example 2

[0081] The method is similar to that of Example 1, except that the ratio of deoiled asphalt to re-extracted oil in step S2 is adjusted.

[0082] Example 3

[0083] The method is similar to that of Example 1, except that the ratio of deoiled asphalt to re-extracted oil in step S2 is adjusted.

[0084] Example 4

[0085] The same method as in Example 1 was used, except that the type of crude oil was changed.

[0086] Example 5

[0087] The method is similar to that of Example 1, except that in step S1, the furfural refining treatment step is carried out in the following manner:

[0088] S11: extracting the reduced fourth-line distillate oil and the furfural in an extraction tower, wherein the reduced fourth-line distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the feed weight ratio of the reduced fourth-line distillate oil to the furfural is 1:1;

[0089] S12: After the extracted oil produced at the bottom of the extraction tower is subjected to sedimentation treatment, the lower layer liquid is separated to obtain heavy extracted oil.

[0090] Wherein, in step S11, the top temperature of the extraction tower is 125°C, the bottom temperature is 90°C, and the bottom pressure is 0.7MPa;

[0091] In step S12, the temperature of the sedimentation treatment is 45°C, the pressure is 0.5 MPa, and the sedimentation time is 20 minutes.

[0092] Specifically, various parameters in the preparation process are shown in Table 1 below, and performance parameters of the prepared heavy traffic road asphalt are shown in Table 2 below.

[0093] Comparative Example 1

[0094] The method is similar to that of Example 1, except that the ratio of deoiled asphalt to re-extracted oil in step S2 is adjusted.

[0095] Table 1

[0096]

[0097]

[0098] Table 2

[0099]

[0100]

[0101] Table 2 (Continued)

[0102]

[0103]

[0104] It can be seen from the results in Table 1 that the method of the embodiment of the present invention can produce heavy traffic road asphalt that meets the AH-70 or AH-90 specification requirements of GB / T15180-2010 using deoiled asphalt and re-extracted oil.

[0105] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A method for preparing heavy traffic road asphalt, characterized in that: The following steps are involved: S1: subjecting crude oil to propane deasphalting treatment to obtain deoiled asphalt; as well as The fourth-line distillate oil is subjected to furfural refining treatment to obtain heavy-extracted oil; S2: blending the deoiled asphalt with the re-extracted oil to obtain re-traffic road asphalt; In step S1, the crude oil comprises an intermediate base crude oil and a paraffin base crude oil, and relative to 100 parts by weight of the crude oil, the intermediate base crude oil accounts for 70-99 parts by weight, and the paraffin base crude oil accounts for 1-30 parts by weight; In step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is not more than 1.8wt%, and the needle penetration of the deoiled asphalt is 251 / 10mm-451 / 10mm; and the conditions of the furfural refining treatment are controlled so that the wax content of the heavy-extracted oil is not more than 3.5wt%, the saturated hydrocarbon content of the heavy-extracted oil is not more than 10wt%, and the aromatic hydrocarbon content is not less than 60wt%; In step S2, the total weight of the de-oiled asphalt and the re-extracted oil to be blended is 100 parts by weight, wherein the de-oiled asphalt accounts for 70-90 parts by weight and the re-extracted oil accounts for 10-30 parts by weight.

2. The method according to claim 1, characterized in that In step S1, the furfural refining process comprises: S11: extracting the reduced fourth-line distillate oil and the furfural in an extraction tower, wherein the reduced fourth-line distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the feed weight ratio of the reduced fourth-line distillate oil to the furfural is 1:(1.8-2.8); S12: After the extracted oil produced at the bottom of the extraction tower is subjected to sedimentation treatment, the lower layer of liquid is separated to obtain the heavy extracted oil.

3. The method according to claim 2, characterized in that In step S11, the top temperature of the extraction tower is 123°C-127°C, the bottom temperature is 88°C-92°C, and the bottom pressure is 0.5MPa-0.9MPa.

4. The method according to claim 2, characterized in that: In step S12, the temperature of the sedimentation treatment is 40°C-50°C, the pressure is 0.3MPa-0.8MPa, and the sedimentation time is 15min-30min.

5. The method according to any one of claims 1 to 4, characterized in that: In step S2, the total weight of the de-oiled asphalt and the re-extracted oil to be blended is 100 parts by weight, wherein the de-oiled asphalt accounts for 75-90 parts by weight and the re-extracted oil accounts for 10-25 parts by weight; Preferably, the total weight of the de-oiled asphalt and the re-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the de-oiled asphalt accounts for 77-80 parts by weight and the re-extracted oil accounts for 20-23 parts by weight.

6. The method according to any one of claims 1 to 4, characterized in that: In step S1, the conditions of the propane deasphalting treatment are controlled so that the softening point of the deoiled asphalt is 50° C.-65° C.; Preferably, in step S1, the conditions of the propane deasphalting treatment are controlled so that the flash point of the deoiled asphalt is not less than 315°C.

7. The method according to any one of claims 1 to 4, characterized in that: In step S1, the furfural refining treatment conditions are controlled so that the flash point of the re-extracted oil is not less than 240°C; Preferably, in step S1, the furfural refining treatment conditions are controlled so that the pour point of the re-extracted oil is not higher than 25°C; Preferably, in step S1, the conditions of the furfural refining treatment are controlled so that the initial boiling point of the heavy-extracted oil is not lower than 325°C.

8. The method according to any one of claims 1 to 4, characterized in that: In step S2, the temperature of the blending treatment is 120°C-140°C, and the blending time is 3min-10min.

9. The method according to any one of claims 1 to 4, characterized in that: The intermediate base crude oil is selected from at least one of Angola Plutoni crude oil, Caesarje crude oil, Saudi Arabian medium crude oil, Mahila crude oil, Hango crude oil and Oman crude oil; Preferably, the paraffin-based crude oil is selected from at least one of Russian mixed crude oil ESPO and Angola Cabinda crude oil.

10. A heavy traffic road asphalt, characterized in that: Prepared by the method described in any one of claims 1 to 9.

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