Process for producing carbon black raw oil by using catalytic slurry oil and catalytic cycle oil

Abstract

The invention discloses a process for producing carbon black raw oil by using catalytic slurry oil and catalytic cycle oil. The preparation method comprises the following steps: adding catalytic cycle oil into catalytic slurry oil, fully mixing to form blend slurry oil, and then carrying out sedimentation and solid removal treatment on the blend slurry oil to obtain carbon black raw oil; wherein the mass ratio of the catalytic slurry oil to the catalytic circulating oil is (80-95): (5-20); the settling solid removal treatment mode is that an oil slurry deliming agent is used for deliming treatment, and the adding proportion of the oil slurry deliming agent is 0.02%-0.1% of the mass of the catalytic oil slurry. According to the invention, the purpose of producing the carbon black raw oil by using the catalytic slurry oil is realized, the product quality meets the index requirements of GB / T41957-2022 Carbon Black Raw Oil Petroleum Refining Catalytic Slurry Oil, and the production process is simple and feasible.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon black feedstock oil production, and specifically relates to a process for producing carbon black feedstock oil by utilizing catalytic oil slurry and catalytic circulating oil. Background Art

[0002] At present, the raw materials for carbon black in the world mainly include coal tar, ethylene tar and catalytic cracking oil. my country has rich coal tar resources. Carbon black production mainly uses coal tar-based carbon black raw materials, including unprocessed coal tar and coal tar fractions, namely anthracene oil and "carbon black oil", and also uses a small amount of ethylene tar.

[0003] For oil refineries, the effective utilization of by-product oil slurry from catalytic cracking units has always been a major problem that has plagued their production.

[0004] There are three main ways to utilize slurry oil:

[0005] 1. Simply used as fuel oil;

[0006] 2. Enter the delayed coking unit as raw material for blending;

[0007] 3. After desolidification and hydrogenation treatments, it is used as raw material to produce needle coke.

[0008] All three treatment methods mentioned above have certain limitations. For example, using it directly as fuel oil is not an environmentally friendly fuel due to its high sulfur content. The delayed coking blending of slurry oil leads to a high coking rate, and there are also delayed coking units that have unplanned shutdowns due to the processing of catalytic slurry oil. There have even been companies that have experienced leaks and fires caused by the processing of catalytic slurry oil. As for the production of needle coke, its processing route is extended and requires greater investment.

[0009] In the past, due to the low aromatic content and high ash content of the slurry oil of the catalytic cracking unit, it was not adopted by carbon black production enterprises. However, with the heavy and inferior quality of the raw oil of the catalytic cracking unit, the technological progress of the equipment of the catalytic cracking unit, the aromatic content of the catalytic oil slurry has increased significantly, and the solid content and ash content of the catalytic oil slurry have decreased significantly, which makes it possible to use catalytic oil slurry to produce carbon black raw materials. However, the high viscosity of the carbon black raw material produced by using only catalytic oil slurry is difficult to meet the requirements of the national standard (GB / T41957-2022 "Carbon Black Raw Oil Petroleum Refining Catalytic Oil Slurry"). Chinese patent document CN107216911 A discloses a process for online desolidification and purification of catalytic oil slurry. Using this process, the large group of colloidal asphaltene with high viscosity and easy to clog the liquid-solid separation device contained in the catalytic oil slurry can be separated from the oil slurry, and the solid particle content is also reduced; however, the use of this process requires preheating (heating temperature 150-280°C) to obtain good fluidity, which is convenient for subsequent pipeline transportation and separation. In addition, the process involves backwashing of the solid-liquid separator, which increases the complexity of the catalytic oil slurry process. The present invention aims to provide a process for producing carbon black feedstock oil using catalytic oil slurry and catalytic circulating oil to solve the technical problems of high viscosity of catalytic oil slurry and complex desolidification process. Summary of the invention

[0010] The present invention provides a process for producing carbon black feedstock oil by using catalytic slurry oil and catalytic circulating oil. The final product prepared by the present invention meets the quality index requirements of GB / T 41957-2022 "Carbon black feedstock oil petroleum refining catalytic slurry oil", can be used as carbon black feedstock oil, and realizes the effective comprehensive utilization of catalytic slurry oil.

[0011] The following are the specific technical solutions of the present invention.

[0012] The present invention provides a process for producing carbon black feedstock oil by using catalytic oil slurry and catalytic circulating oil, comprising:

[0013] 1) The catalytic oil slurry enters the blending unit, and the catalytic circulating oil is added and fully mixed to form the blending oil slurry;

[0014] 2) subjecting the blended oil slurry formed after mixing to sedimentation and desolidification treatment to obtain carbon black feedstock oil;

[0015] Wherein, in the blended oil slurry, the mass ratio of the catalytic oil slurry to the catalytic cycle oil is 80-95:5-20;

[0016] The sedimentation and desolidification treatment method is to use an oil slurry deliming agent for deliming treatment, and the addition ratio of the oil slurry deliming agent is 0.02% to 0.1% of the mass of the catalytic oil slurry.

[0017] Preferably, in step 2), the sedimentation and desolidification treatment is carried out for more than 24 hours until the ash content of the blended oil slurry is less than 0.1% (mass fraction).

[0018] Preferably, the temperature of the sedimentation desolidification treatment is 80-120°C.

[0019] Preferably, the temperature of the sedimentation desolidification treatment is 90±5°C.

[0020] Preferably, before the step 1) is implemented, the catalytic oil slurry is pre-treated by adding an oil slurry deliming agent.

[0021] Preferably, in step 2), the blending unit is a mixer for mixing the catalytic oil slurry and the catalytic cycle oil.

[0022] Preferably, the density of the catalytic oil slurry (20°C) is 1.05-1.13 kg / cm 3 , kinematic viscosity (100℃) is 13~38mm 2 / s, ash content ≤ 0.15% (mass fraction); the density of the catalytic cycle oil (20°C) is 0.95-1.02 kg / cm 3 , kinematic viscosity (20℃) is 12~25mm 2 / s, initial distillation point ≥112℃.

[0023] Preferably, the density of the catalytic oil slurry (20°C) is 1.110 kg / cm 3 , kinematic viscosity (100℃) is 20mm 2 / s, ash content ≤0.06% (mass fraction).

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) The present invention blends catalytic oil slurry and catalytic cycle oil in a certain ratio, fully mixes them, and removes solid impurities by sedimentation, and finally obtains a product that meets the quality index requirements of GB / T 41957-2022 "Carbon black feedstock oil petroleum refining catalytic oil slurry".

[0026] 2) The process of the present invention is used to obtain a carbon black raw material with low ash content and Engler viscosity E 80 The sedimentation and desolidification treatment time is moderate, and no heating pretreatment is required. The process is simple and the energy consumption is low.

[0027] 3) The process parameters of the present invention are easy to control, the process equipment is simple, and no large-scale equipment modification or expansion is required, thereby making reasonable use of cheap and abundant catalytic cracking slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1The present invention provides a process for producing carbon black feedstock oil by using catalytic slurry oil and catalytic cycle oil;

[0029] In the figure, 1-catalytic cracking fractionation tower, 2-slurry deashing agent storage tank, 3-mixer, 4-product storage tank, 5-catalytic slurry oil, 6-slurry deashing agent, 7-catalytic circulating oil. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, some adjustments and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] [Examples 1 to 10]

[0032] like Figure 1 As shown, the process flow of the present invention for producing carbon black feedstock oil by using catalytic oil slurry and catalytic circulating oil is as follows:

[0033] 1) Catalytic oil slurry 5 is extracted from the catalytic cracking fractionation tower 1;

[0034] Specifically, the density of the catalytic oil slurry (20°C) is controlled to be 1.05-1.13 kg / cm 3 , kinematic viscosity (100℃) is 13~38mm 2 / s, ash content ≤ 0.15% (mass fraction), the specific control parameters of the catalytic slurry in each embodiment are shown in Table 1;

[0035] 2) Adding oil slurry deashing agent 6 to the catalytic oil slurry pipeline, the addition ratio of the oil slurry deashing agent is controlled to be 0.02-0.1 parts based on 100 parts of the catalytic oil slurry mass. The specific addition ratios of each embodiment are shown in Table 2;

[0036] 3) Catalytic cycle oil 7 is extracted from the catalytic cracking fractionation tower 1;

[0037] Specifically, the density of the catalytic cycle oil (20°C) is controlled to be 0.95-1.02 kg / cm 3 , kinematic viscosity (20℃) is 12~25mm 2 / s, initial boiling point ≥112°C; the specific control parameters of the catalytic cycle oil of each embodiment are shown in Table 3;

[0038] 4) Catalytic oil slurry 5 enters the blending unit ( Figure 1 The blending unit shown is a mixer 3), which is added with catalytic circulating oil and mixed thoroughly to form a blending oil slurry, and the mass ratio of catalytic oil slurry and catalytic circulating oil in the blending oil slurry is controlled to be 80-95:5-20; the specific addition ratio of catalytic oil slurry and catalytic circulating oil in each embodiment is shown in Table 4;

[0039] 5) The mixed catalytic oil slurry and catalytic circulating oil are sent to the product storage tank for sedimentation and desolidification treatment, and the sedimentation and desolidification treatment time is controlled to be greater than 24 hours, until the ash content of the blended oil slurry is less than 0.1% (mass fraction). The specific sedimentation and desolidification treatment time of each embodiment is shown in Table 5. In order to speed up the sedimentation and desolidification treatment time of the present invention, it is preferred that the sedimentation and desolidification treatment temperature is controlled at 80-120°C, and the sedimentation and desolidification treatment time is 25 to 75 hours. The specific sedimentation and desolidification treatment temperature of each embodiment is 90±5°C.

[0040] In the present invention, the oil slurry deashing agent plays a role in deashing during the sedimentation and desolidification treatment process. Therefore, it can be understood that the addition of the oil slurry deashing agent can be before the addition of the catalytic circulating oil or after the addition of the catalytic circulating oil. The commercially available oil slurry deashing agent mainly contains polyols or polyether resins and aromatic solvents. The oil slurry deashing agents of Examples 1-5 of the present invention were purchased from Guangdong Yueshou Company (model YS-4015), and the oil slurry deashing agents of Examples 6-10 were purchased from Guangdong Yueshou Company (model YS-4010).

[0041] Table 1. Control parameters of catalytic slurry in various examples

[0042] <![CDATA[Density (20 °C), kg / cm 3 > <![CDATA[Kinematic viscosity (100 °C), mm 2 / s]]> Ash content, % (mass fraction) Example 1 1.110 20 0.06 Example 2 1.115 25 0.07 Example 3 1.117 28 0.11 Example 4 1.124 35 0.13 Example 5 1.128 38 0.15 Example 6 1.050 13 0.04 Example 7 1.077 15 0.05 Example 8 1.089 16 0.05 Example 9 1.096 17 0.06 Example 10 1.105 19 0.06

[0043] Table 2. Addition ratio of catalytic oil slurry deashing agent in each example

[0044]

[0045]

[0046] Table 3. Control parameters of catalytic cycle oil in various embodiments

[0047] <![CDATA[Density (20 °C), kg / cm 3 > <![CDATA[Kinematic viscosity (20 °C), mm 2 / s]]> Initial distillation point, ℃ Example 1 1.0155 25 133 Example 2 1.0143 21 131 Example 3 1.0129 18 127 Example 4 1.0134 20 130 Example 5 1.0136 22 132 Example 6 0.9541 12 112 Example 7 0.9659 13 118 Example 8 0.9746 13 122 Example 9 0.9985 15 125 Example 10 1.0045 18 127

[0048] Table 4. Catalytic cycle oil addition ratios for each example

[0049] Catalytic oil slurry ratio, % (mass fraction) Proportion of catalytic cycle oil, % (mass fraction) Example 1 88 12 Example 2 85 15 Example 3 84 16 Example 4 82 18 Example 5 80 20 Example 6 95.0 5.0 Example 7 92.0 8.0 Example 8 89.5 10.5 Example 9 88.8 11.2 Example 10 85.0 15.0

[0050] Table 5. Sedimentation and desolidification treatment time of each embodiment

[0051]

[0052]

[0053] The performance of the products in Examples 1 to 10 was measured, and the specific measurement results are shown in Table 6.

[0054] It can be seen from the test results in Table 6 that the quality indicators of the produced carbon black raw material oil fully meet the requirements of GB / T41957-2022 "Carbon Black Raw Material Oil Petroleum Refining Catalytic Oil Slurry".

[0055] Table 6. Example product performance measurement

[0056]

[0057] Table 6. Performance measurement of the products in the examples

[0058]

[0059] [Comparative Example 1]

[0060] The difference between Comparative Example 1 and Example 7 is step 4), and the other steps are the same as Example 7. Step 4) of Comparative Example 1 is as follows: the catalytic oil slurry enters the mixer, and the catalytic circulating oil is added and mixed thoroughly to form a blended oil slurry, in which the catalytic oil slurry accounts for 55% and the catalytic circulating oil accounts for 45%.

[0061] [Comparative Example 2]

[0062] The difference between Comparative Example 2 and Example 2 is step 4), and the other steps are the same as Example 2. Step 4) of Comparative Example 2 is as follows: the catalytic oil slurry enters the mixer, and the catalytic circulating oil is added and mixed thoroughly to form a blended oil slurry, in which the catalytic oil slurry accounts for 57% and the catalytic circulating oil accounts for 43%.

[0063] [Comparative Example 3]

[0064] The difference between Comparative Example 3 and Example 5 is that no oil slurry deliming agent is added, and no catalytic circulating oil is added; the other conditions are the same as Example 5.

[0065] The performance test results of the products prepared in Comparative Examples 1-3 are shown in Table 7.

[0066] It can be seen from the test results in Table 7 that the products prepared in Comparative Examples 1-3 do not meet the requirements of GB / T 41957-2022 "Carbon black feedstock oil petroleum refining catalytic oil slurry".

[0067] Table 7. Comparative Example Product Performance Measurement

[0068]

[0069] In Comparative Examples 1 and 2, too much catalytic circulating oil was added, and the final product performance density index was low and did not meet the quality requirements. In Comparative Example 3, no oil slurry deashing agent or catalytic circulating oil was added, and the final product ash content was high and did not meet the quality requirements.

[0070] According to the process of the present invention, the mass ratio of catalytic slurry oil and catalytic circulating oil in the blended slurry oil is controlled to be 80-95:5-20; the slurry oil deashing agent is used for deashing, and the addition ratio of the slurry oil deashing agent is 0.02%-0.1% of the mass of the catalytic slurry oil, and the obtained carbon black raw material oil has low ash content and Engler viscosity E 80 It is moderate and meets the quality requirements, and the sedimentation and desolidification treatment time is short, no heating pretreatment is required, the process is simple and the energy consumption is low.

[0071] The present invention obtains carbon black feedstock oil by adding a suitable proportion of catalytic circulating oil to the catalytic oil slurry and mixing them fully, and using the oil slurry deashing agent to perform sedimentation and desolidification treatment. The present invention achieves the purpose of using catalytic oil slurry to produce carbon black feedstock oil, and the product quality meets the index requirements of GB / T 41957-2022 "Carbon Black Feedstock Oil Petroleum Refining Catalytic Oil Slurry". In addition, the process parameters of the present invention are easy to control, the process equipment is simple, and there is no need for large-scale equipment transformation and expansion, so that cheap and abundant catalytic cracking oil slurry can be reasonably utilized.

[0072] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A process for producing carbon black feedstock oil using catalytic slurry oil and catalytic cycle oil, comprising: 1) The catalytic oil slurry enters the blending unit, and the catalytic circulating oil is added and fully mixed to form the blending oil slurry; 2) subjecting the blended oil slurry formed after mixing to sedimentation and desolidification treatment to obtain carbon black feedstock oil; Wherein, in the blended oil slurry, the mass ratio of the catalytic oil slurry to the catalytic cycle oil is 80-95:5-20; The sedimentation and desolidification treatment method is to use an oil slurry deliming agent for deliming treatment, and the addition ratio of the oil slurry deliming agent is 0.02% to 0.1% of the mass of the catalytic oil slurry.

2. The process according to claim 1, characterized in that In step 2), the sedimentation and desolidification treatment is carried out for more than 24 hours until the ash content of the blended oil slurry is less than 0.1% (mass fraction).

3. The process according to claim 2, characterized in that The temperature of the sedimentation desolidification treatment is 80-120°C.

4. The process according to claim 3, characterized in that The temperature of the sedimentation and desolidification treatment is 90±5°C.

5. The process according to claim 2, characterized in that Before the step 1) is implemented, the catalytic oil slurry is pre-treated by adding an oil slurry deliming agent.

6. The process according to claims 1 to 5, characterized in that In step 2), the blending unit is a mixer, which is used to mix the catalytic oil slurry and the catalytic cycle oil.

7. The process according to claims 1 to 6, characterized in that The density of the catalytic oil slurry (20°C) is 1.05-1.13 kg / cm 3 , kinematic viscosity (100℃) is 13~38mm 2 / s, ash content ≤ 0.15% (mass fraction); the density of the catalytic cycle oil (20°C) is 0.95-1.02 kg / cm 3 , kinematic viscosity (20℃) is 12~25mm 2 / s, initial distillation point ≥112℃.

8. The process according to claim 7, characterized in that The density of the catalytic slurry (20°C) is 1.110 kg / cm 3 , kinematic viscosity (100℃) is 20mm 2 / s, ash content ≤0.06% (mass fraction).

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