Composition for preparing blended gasoline, blended gasoline and preparation method thereof

Abstract

The present invention relates to the field of petrochemicals and discloses a composition for preparing blended gasoline, blended gasoline, and a preparation method thereof. The composition comprises the following components: desulfurized gasoline, reformed gasoline, alkylate oil, methyl tertiary butyl ether, and pentane oil. The composition provided by the present invention can solve the problems of difficult and costly blending of No. 98 gasoline, which meets the new Beijing VIB gasoline standard. The first-pass success rate is significantly improved, resulting in No. 98 gasoline that meets the requirements for antiknock index, vapor pressure, and 50% evaporation temperature.

Description

Technical Field

[0001] The present invention relates to the field of petrochemical industry, in particular to a composition for preparing blended gasoline, the blended gasoline and a preparation method thereof. Background Art

[0002] No. 98 gasoline refers to a gasoline product whose octane number is equal to that of a mixture of 98% isooctane and 2% n-heptane. It is a high-quality gasoline and has the advantages of "two highs and two lows" compared to other grades of gasoline, namely, higher anti-knock and power, and lower harmful substances and exhaust pollution in gasoline. It is the oil product with the highest domestic production standards and is relatively expensive. It is mostly used in high-end cars, so it is known as "super gasoline" and "noble gasoline."

[0003] Beijing began implementing the new Beijing VIB gasoline standard on December 1, 2021. The traditional blending components of No. 98 gasoline are desulfurized gasoline, reformed gasoline, alkylate, and methyl tertiary butyl ether (MTBE). Except for MTBE, the 50% evaporation temperature of all components exceeds 105°C. However, due to the oxygen content index of No. 98 gasoline being less than 2.7%, the proportion of MTBE is limited. As a result, the 50% evaporation temperature of No. 98 gasoline is higher than 105°C, which leads to the prominent problem of non-compliance. This makes production more difficult and thus cannot ensure a stable supply to the market.

[0004] In addition, due to factors such as the high 50% evaporation temperature of self-produced gasoline components, the low octane number of catalytic gasoline, and the small space for optimization of the existing blending ratio, the production of No. 98 gasoline that meets the requirements has always been limited to indicators such as 10% evaporation temperature, 50% evaporation temperature, vapor pressure, and anti-knock index.

[0005] At present, although there are existing technologies for blending by reducing the dry point of catalytic gasoline and reforming gasoline, adjusting the catalyst formula, etc., it is still difficult to blend No. 98 gasoline under traditional blending components.

[0006] Therefore, it is urgent to provide a kind of No. 98 gasoline that is easy to blend and has low cost. Summary of the Invention

[0007] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide a blended gasoline that is easy to blend (suitable for industrial production) and low in cost while ensuring that the anti-knock index, vapor pressure and 50% evaporation temperature requirements are met at the same time.

[0008] In order to achieve the above object, the first aspect of the present invention provides a composition for preparing blended gasoline, which comprises the following components:

[0009] Desulfurized gasoline, reformed gasoline, alkylate, MTBE, and pentane oil;

[0010] The research octane number of the pentane oil is 82-91, the final boiling point is 90-105°C, and the density at 20°C is 600-630 kg / m 3 ;

[0011] Based on the total weight of the composition, the content of the desulfurized gasoline is 18-24 wt%, the content of the reformed gasoline is 18-24 wt%, the content of the alkylate oil is 28-40 wt%, the content of the methyl tert-butyl ether is 8-16 wt%, and the content of the pentane oil is 1-10 wt%.

[0012] The second aspect of the present invention provides a method for preparing blended gasoline, which is carried out using the composition described in the first aspect, and comprises: mixing the components in the composition.

[0013] The third aspect of the present invention provides a blended gasoline prepared by the method described in the second aspect.

[0014] The present invention solves the problems of difficult and high cost blending of No. 98 gasoline by using a specific type of pentane oil in combination with specific amounts of desulfurized gasoline, reformed gasoline, alkylate and methyl tert-butyl ether, and significantly improves the first-time success rate, thereby obtaining No. 98 gasoline that meets the requirements in terms of anti-knock index, vapor pressure and 50% evaporation temperature. DETAILED DESCRIPTION

[0015] The endpoints of the ranges and any values ​​disclosed herein 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 endpoints of each range, the endpoints of each range and 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 to be specifically disclosed herein.

[0016] In the present invention, the 50% evaporation temperature refers to the temperature at which 50 wt% of the substances in the finished gasoline evaporate, and is an important indicator of the average volatility of gasoline.

[0017] Likewise, the 10% evaporation temperature and the 90% evaporation temperature have similar definitions to the 50% evaporation temperature.

[0018] In the present invention, the research octane number is obtained by testing with reference to the method in GB / T 5487-2015, Determination of gasoline octane number - Research method; the motor octane number is obtained by testing with reference to the method in GB / T 503-2016, Determination of gasoline octane number - Motor method; and the olefin content and aromatic content are both obtained by testing with reference to the method in GB / T 30519-2016, Determination of hydrocarbon group composition and benzene in light petroleum fractions and products - Multidimensional gas chromatography.

[0019] In the present invention, the pentane oil contains at least one of n-pentane, isopentane and neopentane.

[0020] As mentioned above, the first aspect of the present invention provides a composition for preparing blended gasoline, which comprises the following components:

[0021] Desulfurized gasoline, reformed gasoline, alkylate, MTBE, and pentane oil;

[0022] The pentane oil has a research octane number (RON) of 82-91, a final boiling point of 90-105° C., and a density of 600-630 kg / m at 20° C. 3 ;

[0023] Based on the total weight of the composition, the content of the desulfurized gasoline is 18-24 wt%, the content of the reformed gasoline is 18-24 wt%, the content of the alkylate oil is 28-40 wt%, the content of the methyl tert-butyl ether is 8-16 wt%, and the content of the pentane oil is 1-10 wt%.

[0024] Preferably, the reformed gasoline has a research octane number of 97-103, a 50% evaporation temperature of 130-140°C, a 90% evaporation temperature of 168-178°C, a final boiling point of 195-200°C, and a density of 840-852 kg / m3 at 20°C. 3 More preferably, the research octane number of the reformed gasoline is 99-102, the 50% evaporation temperature is 132-138°C, the 90% evaporation temperature is 170-176°C, the final boiling point is 196-200°C, and the density at 20°C is 845-852 kg / m 3 .

[0025] Preferably, the alkylate has a research octane number of 95-98, a 50% vaporization temperature of 100-106°C, a 90% vaporization temperature of 122-130°C, a final boiling point of 190-203°C, and a density of 680-697 kg / m at 20°C. 3 , olefin content <0.5v%, aromatics content <1.0v%.

[0026] More preferably, the alkylate has a research octane number of 96-98, a 50% evaporation temperature of 100-105°C, a 90% evaporation temperature of 122-128°C, a final boiling point of 195-200°C, and a density of 680-695 kg / m3 at 20°C. 3 , olefin content <0.5v%, aromatics content <1.0v%. The inventors of the present invention have found that under this preferred condition, the 50% evaporation temperature of the blended gasoline obtained is lower.

[0027] Preferably, the desulfurized gasoline has a research octane number of 87-92, a 50% evaporation temperature of 93-108°C, a 90% evaporation temperature of 170-185°C, a final boiling point of 195-210°C, and a density of 700-750 kg / m at 20°C. 3 .

[0028] Particularly preferably, the desulfurized gasoline has a research octane number of 88-90, a 50% evaporation temperature of 94-106°C, a 90% evaporation temperature of 170-184°C, a final boiling point of 200-210°C, and a density of 720-740 kg / m3 at 20°C. 3 .

[0029] Preferably, the research octane number of the methyl tert-butyl ether is 113-116, the final boiling point is 55-56°C, and the density at 20°C is 740-750 kg / m 3 .

[0030] According to a preferred embodiment, the composition further contains reformed tops oil, and the content of the reformed tops oil is 1-10 wt % based on the total weight of the composition.

[0031] Preferably, the research octane number of the reformed tops oil is 74-76, the 50% evaporation temperature is 50-52°C, the 90% evaporation temperature is 70-73°C, the final boiling point is 89-92°C, and the density at 20°C is 624-629 kg / m 3 The inventors of the present invention have found that under this preferred condition, the blended gasoline obtained has better economic performance.

[0032] According to another preferred embodiment, the composition further contains benzene raffinate oil, and the content of the benzene raffinate oil is 1-10 wt % based on the total weight of the composition.

[0033] Preferably, the research octane number of the benzene raffinate oil is 70-72, the 50% evaporation temperature is 62-64°C, the 90% evaporation temperature is 78-81°C, the final boiling point is 114-117°C, and the density at 20°C is 689-692 kg / m 3 The inventors of the present invention have found that under this preferred condition, the obtained blended gasoline has better economic performance.

[0034] As mentioned above, the second aspect of the present invention provides a method for preparing blended gasoline, which is carried out using the composition described in the first aspect, and comprises: mixing the components in the composition.

[0035] Preferably, the mixing conditions include: performing the mixing in a gasoline blending tank at a temperature of 0-40° C., and pump circulation for 10-24 hours, with a pump outlet pressure of 0.2-0.5 MPa.

[0036] As mentioned above, the third aspect of the present invention provides a blended gasoline prepared by the method described in the second aspect.

[0037] The present invention will be described in detail below through examples.

[0038] In the following examples, unless otherwise specified, all raw materials used were commercially available.

[0039] The relevant properties of the raw materials used in the following examples are shown in Table 1, where MON represents the motor octane number.

[0040] Table 1

[0041]

[0042] Example 1

[0043] This example is used to illustrate that the blended gasoline of the present invention is prepared according to the following formula and method.

[0044] The formula for blending gasoline is as follows:

[0045] The content of desulfurized gasoline I (desulfurized gasoline) is 22.5 wt%, the content of reformed gasoline is 22.5 wt%, the content of alkylate oil I (alkylate oil) is 39 wt%, the content of methyl tert-butyl ether is 13 wt%, and the content of pentane oil I (pentane oil) is 3 wt%;

[0046] The method for preparing blended gasoline comprises the following steps:

[0047] Desulfurized gasoline, reformed gasoline, alkylate, methyl tert-butyl ether and pentane oil are mixed to obtain blended gasoline Q1;

[0048] The mixing conditions are: carried out in a gasoline blending tank at a temperature of 25°C, with a pump circulation of 12 hours and a pump outlet pressure of 0.3 MPa.

[0049] Example 2

[0050] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0051] The content of alkylate oil I is 37 wt%, and the content of pentane oil I is 5 wt%;

[0052] The remaining conditions were the same as those in Example 1, and blended gasoline Q2 was obtained.

[0053] Example 3

[0054] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0055] The content of alkylate oil I is 34 wt%, and the content of pentane oil I is 8 wt%;

[0056] The remaining conditions were the same as those in Example 1, and blended gasoline Q3 was obtained.

[0057] Example 4

[0058] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0059] The content of alkylate oil I is 32 wt%, and the content of pentane oil I is 10 wt%;

[0060] The remaining conditions were the same as those in Example 1, and blended gasoline Q4 was obtained.

[0061] Example 5

[0062] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0063] The desulfurized gasoline is desulfurized gasoline II with a content of 22.5 wt%, the content of reformed gasoline is 24 wt%, the content of alkylate oil I is 34 wt%, the content of methyl tert-butyl ether is 13 wt%, and the content of pentane oil I is 6.5 wt%;

[0064] The remaining conditions were the same as those in Example 1 to obtain blended gasoline Q5.

[0065] Example 6

[0066] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0067] The content of desulfurized gasoline I is 20 wt%, the content of reformed gasoline is 24 wt%, the alkylate oil is alkylate oil II and its content is 36 wt%, the content of methyl tert-butyl ether is 13 wt%, and the content of pentane oil I is 7 wt%;

[0068] The remaining conditions were the same as those in Example 1, and blended gasoline Q6 was obtained.

[0069] Example 7

[0070] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0071] The content of desulfurized gasoline I is 20 wt %, the content of reformed gasoline is 24 wt %, the content of alkylate oil I is 34 wt %, the content of methyl tert-butyl ether is 13 wt %, the content of pentane oil I is 6 wt %, and the content of reformed topped oil is 3 wt %;

[0072] The remaining conditions were the same as those in Example 1, and blended gasoline Q7 was obtained.

[0073] Example 8

[0074] This embodiment is carried out in the same manner as in embodiment 1, except that:

[0075] The content of desulfurized gasoline I is 20 wt%, the content of reformed gasoline is 24 wt%, the content of alkylate oil I is 34 wt%, the content of methyl tert-butyl ether is 13 wt%, the content of pentane oil I is 6 wt%, and the content of benzene raffinate oil is 3 wt%;

[0076] The remaining conditions were the same as those in Example 1, and blended gasoline Q8 was obtained.

[0077] Comparative Example 1

[0078] This comparative example was carried out in the same manner as in Example 1, except that:

[0079] The content of desulfurized gasoline I is 30 wt%, the content of reformed gasoline is 22.5 wt%, the content of alkylate oil I is 28 wt%, the content of methyl tert-butyl ether is 13 wt%, and the content of pentane oil I is 6.5 wt%;

[0080] The remaining conditions were the same as those in Example 1, and blended gasoline DQ1 was obtained.

[0081] Comparative Example 2

[0082] This comparative example was carried out in the same manner as in Example 1, except that:

[0083] The content of desulfurized gasoline I is 22.5 wt%, the content of reformed gasoline is 30 wt%, the content of alkylate oil I is 28 wt%, the content of methyl tert-butyl ether is 13 wt%, and the content of pentane oil I is 6.5 wt%;

[0084] The remaining conditions were the same as those in Example 1, and blended gasoline DQ2 was obtained.

[0085] Comparative Example 3

[0086] This comparative example was carried out in the same manner as in Example 1, except that:

[0087] The content of alkylate oil I is 29 wt%, and the content of pentane oil I is 13 wt%;

[0088] The remaining conditions were the same as those in Example 1, and blended gasoline DQ3 was obtained.

[0089] Comparative Example 4

[0090] This comparative example was carried out in the same manner as in Example 1, except that:

[0091] Pentane oil is Pentane oil II;

[0092] The remaining conditions were the same as those in Example 1, and blended gasoline DQ4 was obtained.

[0093] Comparative Example 5

[0094] This comparative example was carried out in the same manner as in Example 1, except that:

[0095] Pentane oil is pentane oil III;

[0096] The remaining conditions were the same as those in Example 1, and blended gasoline DQ5 was obtained.

[0097] Test Case

[0098] The blended gasoline prepared in the examples and comparative examples was subjected to the following performance tests, specifically as follows:

[0099] (1) Antiknock index: Tested with reference to GB / T 503-2016 Motor method for determination of gasoline octane number and GB / T5487-2015 Research method for determination of gasoline octane number;

[0100] (2) Vapor pressure: Tested according to GB / T 8017-2012 Determination of vapor pressure of petroleum products using the Reid method;

[0101] (3) Oxygen content: Tested in accordance with NB / SH / T 0663-2014 Determination of alcohol and ether content in gasoline by gas chromatography.

[0102] Table 3

[0103]

[0104]

[0105] Table 3

[0106] Vapor pressure (kPa) Olefin content (V%) Aromatic content (V%) Oxygen content (wt%) <![CDATA[Density (20 °C, kg / m 3 )]]> Require 42-62 (summer) ≤12 ≤32.0 ≤2.7 720-775 Example 1 55.0 3.6 28.8 2.45 737.1 Example 2 56.0 3.4 27.9 2.38 736.5 Example 3 61.5 3.4 27.2 2.43 735.1 Example 4 62.0 2.2 26.7 2.40 734.1 Example 5 61.4 3.2 27.6 2.46 737.0 Example 6 62.0 2.2 26.4 2.40 734.0 Example 7 62.0 2.1 26.7 2.39 735.2 Example 8 61.5 2.4 26.8 2.48 734.0 Comparative Example 1 57.5 4.0 23.5 2.40 728.2 Comparative Example 2 50.5 3.5 32.2 2.37 740.2 Comparative Example 3 64.0 2.3 27.6 2.33 735.0 Comparative Example 4 58.0 3.5 28.3 2.38 733.0 Comparative Example 5 57.0 3.5 28.5 2.40 734.0

[0107] It can be seen from the results in Table 3 that the composition provided by the present invention can be used to prepare No. 98 gasoline with an anti-knock index, vapor pressure and 50% evaporation temperature that all meet the requirements.

[0108] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A composition for preparing blended gasoline, characterized in that: The composition contains the following components: Desulfurized gasoline, reformed gasoline, alkylate, MTBE, and pentane oil; The research octane number of the desulfurized gasoline is 87-92, the 50% evaporation temperature is 93-108°C, the 90% evaporation temperature is 170-185°C, the final boiling point is 195-210°C, and the density at 20°C is 700-750 kg / m 3 ; The research octane number of the reformed gasoline is 97-103, the 50% evaporation temperature is 130-140°C, the 90% evaporation temperature is 168-178°C, the final distillation point is 195-200°C, and the density at 20°C is 840-852 kg / m 3 ; The research octane number of the alkylate oil is 95-98, the 50% evaporation temperature is 100-106°C, the 90% evaporation temperature is 122-130°C, the final boiling point is 190-203°C, and the density at 20°C is 680-697 kg / m 3 , olefin content <0.5v%, aromatics content <1.0v%; The research octane number of the pentane oil is 82-91, the final boiling point is 90-105°C, and the density at 20°C is 600-630 kg / m 3 ; Based on the total weight of the composition, the content of the desulfurized gasoline is 18-24 wt%, the content of the reformed gasoline is 18-24 wt%, the content of the alkylate oil is 28-40 wt%, the content of the methyl tert-butyl ether is 8-16 wt%, and the content of the pentane oil is 1-10 wt%.

2. The composition according to claim 1, wherein The research octane number of the methyl tert-butyl ether is 113-116, the final boiling point is 55-56° C., and the density at 20° C. is 740-750 kg / m 3 .

3. The composition according to claim 1 or 2, wherein The composition further contains reformed tops oil, and the content of the reformed tops oil is 1-10 wt % based on the total weight of the composition.

4. The composition according to claim 3, wherein The research octane number of the reformed tops oil is 74-76, the 50% evaporation temperature is 50-52°C, the 90% evaporation temperature is 70-73°C, the final distillation point is 89-92°C, and the density at 20°C is 624-629 kg / m 3 .

5. The composition according to claim 1 or 2, wherein The composition further contains benzene raffinate oil, and the content of the benzene raffinate oil is 1-10 wt % based on the total weight of the composition.

6. The composition according to claim 5, wherein The research octane number of the benzene raffinate oil is 70-72, the 50% evaporation temperature is 62-64°C, the 90% evaporation temperature is 78-81°C, the final distillation point is 114-117°C, and the density at 20°C is 689-692 kg / m 3 .

7. A method for preparing blended gasoline, characterized in that: The method is carried out using the composition according to any one of claims 1 to 6, and comprises: mixing the components in the composition.

8. The method according to claim 7, wherein: The mixing conditions include: carrying out the mixing in a gasoline blending tank at a temperature of 0-40° C., and a pump circulation of 10-24 hours, with a pump outlet pressure of 0.2-0.5 MPa.

9. Blended gasoline prepared by the method according to claim 7 or 8.

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