A method for removing ash from catalytic cracking slurry oil

Abstract

The present invention discloses a method for removing ash from catalytic cracking slurry, belonging to the technical field of petrochemical industry, which comprises the following steps: adding a filter medium into the catalytic cracking slurry, heating, stirring, and filtering to obtain a purified slurry; the filter medium includes at least one of peanut shell powder, melon seed shell powder, and walnut shell powder. The present invention adopts a biological carbon source filter medium, which can effectively solve the problems of long ash removal time and poor effect in catalytic cracking slurry, can quickly remove ash, has the characteristics of fast filtration speed, good quality of the purified slurry after filtration, and loose filter residue, has the characteristics of low cost and easy operation, and has broad industrialization prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of petrochemical engineering, and particularly to a method for removing the ash content of catalytic cracking slurry. Background Art

[0002] Catalytic cracking slurry is a semi-solid or liquid substance generated during the process of petroleum catalytic cracking. In the process of petroleum refining, in order to convert heavy oil into light oil, catalytic cracking technology is usually adopted. In this process, the feedstock oil contacts with the catalyst under high temperature and high pressure, and cracking reactions occur to generate light oil products (such as gasoline, diesel) and gases, while catalytic cracking slurry is produced as a by-product.

[0003] Catalytic cracking slurry is a very complex mixture. Its main components are large molecular weight alkanes, alkenes and aromatics. At the same time, it also contains heteroatom compounds such as sulfur, nitrogen and oxygen, as well as extremely trace metal compounds (existing in the form of salts or metal compounds). In addition, the slurry also contains a certain amount of catalyst residues, which restricts its application in downstream products, such as residual marine fuel oil, raw materials for the production of needle coke, etc. Therefore, the industry is looking for desolidification technologies with low cost, simple processes and equipment, convenient operation and environmental protection. Currently, the common methods for desolidifying catalytic cracking slurry in industry are: sedimentation separation method, filtration separation method, electrostatic separation method, and centrifugal separation method. CN97121100.0A discloses a method for separating and purifying catalytic cracking externally discharged slurry by a high-temperature centrifuge. The centrifugal separation method disclosed therein has high separation efficiency and can remove solid particles >10μm, but the equipment is complex, operation and maintenance are inconvenient, and the processing capacity is not large, and there is no industrial application example. The natural sedimentation method has simple equipment, low operating cost and easy operation, but only relying on gravity sedimentation, the efficiency is low, the cycle is long, and the purification effect is not good, making it difficult to be widely applied in industry on a large scale. The electric separation method has a low separation temperature, high separation efficiency, easy flushing, and small resistance, but there are many influencing factors for separation, the equipment is too complex, the cost is high, and the process is complex. CN01113133.0A discloses a method for sedimenting and separating catalyst powder in catalytic cracking slurry. It has high separation efficiency, high yield of refined oil, low cost, and considerable economic benefits, but there are certain requirements for the selection of sedimentation agents, and the equipment is complex.

[0004] CN01113134.9A discloses a method for washing and sedimenting and separating catalyst powder in catalytic cracking slurry. The washing separation method disclosed therein is further optimized and studied after the successful industrial application of the flocculation sedimentation method, which can reduce the frequency of slag cleaning in oil tanks and reduce the labor intensity of workers. However, this technology has relatively high requirements for the density of catalytic slurry, requiring the density <0.96g / cm 3。The high-temperature filtration method disclosed in CN9109217.1A is simple in operation, low in investment, stable in separation effect, and strong in adaptability to raw materials. However, the backwashing time of the filter residue is long, the filtration resistance is large, and it is difficult to remove micron-sized particles by ordinary filtration.

[0005] In view of this, the present application is proposed. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art and provide a method for removing the ash content of catalytic cracking slurry, which can effectively solve the problems of long ash removal time and poor effect in catalytic cracking slurry, can quickly remove ash, has a fast filtration speed, has the characteristics of low cost and easy operation, and has broad industrialization prospects.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A method for removing the ash content of catalytic cracking slurry, comprising the following steps: adding a filter material to the catalytic cracking slurry, heating, stirring, and filtering to obtain a purified slurry;

[0009] The filter material includes at least one of peanut shell powder, melon seed shell powder, and walnut shell powder.

[0010] As an embodiment of the present application, the heating temperature is 115~140°C.

[0011] As an embodiment of the present application, the heating temperature is 125~135°C.

[0012] As an embodiment of the present application, the mass ratio of the filter material to the catalytic cracking slurry is (0.1~1):100.

[0013] As an embodiment of the present application, the average particle size of the filter material is 10~200 mesh.

[0014] As an embodiment of the present application, the average particle size of the filter material is 10~100 mesh.

[0015] As an embodiment of the present application, the filter material includes first peanut shell powder, walnut shell powder, and second peanut shell powder; satisfying: B / X 2 <A / X 3 +C / X 1 ;

[0016] wherein, A mesh is the average particle size of the first peanut shell powder;

[0017] B mesh is the average particle size of the walnut shell powder;

[0018] C mesh is the average particle size of the second peanut shell powder;

[0019] X1 % is the mass percentage of the first peanut shell powder in the filter material;

[0020] X 2 % is the mass percentage of the walnut shell powder in the filter material;

[0021] X 3 % is the mass percentage of the first peanut shell powder in the filter material.

[0022] As an embodiment of the present application, the average particle size of the first peanut shell powder is 10 mesh ≤ A mesh ≤ 40 mesh.

[0023] As an embodiment of the present application, the average particle size of the walnut shell powder is 20 mesh ≤ B mesh ≤ 80 mesh.

[0024] As an embodiment of the present application, the average particle size of the second peanut shell powder is 80 mesh ≤ C mesh ≤ 100 mesh.

[0025] As an embodiment of the present application, the mass percentage of the first peanut shell powder in the filter material is 10% ≤ X 1 % ≤ 30%.

[0026] As an embodiment of the present application, the mass percentage of the walnut shell powder in the filter material is 10% ≤ X 2 % ≤ 30%.

[0027] As an embodiment of the present application, the mass percentage of the first peanut shell powder in the filter material is 40% ≤ X 3 % ≤ 80%.

[0028] As an embodiment of the present application, it satisfies: A < B < C.

[0029] As an embodiment of the present application, it satisfies: X1 ≤ X2 < X3.

[0030] The beneficial effects of the present invention are as follows: The present invention utilizes the characteristics of biological seeds. The peanut shells, melon seed shells, and walnut shells have strong affinity for ash. Through electrostatic action and van der Waals force, the ash is retained on the surface of the filter material and removed by filtration. Using renewable biological carbon sources for desolidification of oil slurry is superior to the current sedimentation separation method, filtration separation method, electrostatic separation method, and centrifugal separation method in terms of effect, cost, operation, environmental protection, and industrialization. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0032] In this application, among the technical features described in an open-ended manner, there are closed technical solutions composed of the listed features, as well as open technical solutions including the listed features.

[0033] In this application, regarding numerical ranges, unless otherwise specified, the above numerical ranges are considered continuous and include the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when the range refers to integers, it includes each integer between the minimum and maximum values of the range. In addition, when multiple ranges are provided to describe features or characteristics, these ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all sub-ranges subsumed therein.

[0034] In this application, there are no particular limitations on the specific dispersion and stirring treatment methods.

[0035] Unless otherwise specified, the component raw materials or instruments used in the embodiments and comparative examples of the present invention are all commercially available raw materials or instruments, and the component raw materials used in each parallel experiment are of the same kind.

[0036] The embodiments of this application provide a method for removing the ash content of catalytic cracking slurry, which includes the following steps: adding a filter material to the catalytic cracking slurry, heating, stirring, and filtering to obtain a purified slurry;

[0037] The filter material includes at least one of peanut shell powder, melon seed shell powder, and walnut shell powder.

[0038] The present invention utilizes the characteristics of biological seeds. The peanut shells, melon seed shells, and walnut shells have a strong affinity for ash. Through electrostatic action and van der Waals forces, the ash is retained on the surface of the filter material and removed through filtration. Using renewable biological carbon sources for solid removal from the slurry is superior to the current sedimentation separation method, filtration separation method, electrostatic separation method, and centrifugal separation method in terms of effect, cost, operation, environmental protection, and industrialization.

[0039] The present invention creatively uses a biological carbon source filter material, which can effectively solve the problems of long ash removal time and poor effect in catalytic cracking slurry, can perform ash removal quickly, has the characteristics of fast filtration speed, good quality of the purified slurry after filtration, and loose filter residue, and has the characteristics of low cost and easy operation, and has broad industrial prospects.

[0040] The present invention uses biological carbon source filter materials such as peanut shell powder, melon seed shell powder, and walnut shell powder, which can achieve waste recycling, is beneficial to environmental protection. The production process of the filter material has no emissions of waste gas, waste liquid, waste solid, or peculiar smell, and the slag cleaning work is completed by an automated filtering device.

[0041] The present invention processes catalytic cracking slurry, which can effectively remove solid powder in the catalytic slurry and reduce the ash content of the slurry, enabling the catalytic slurry to reach the level for producing carbon fiber at most, that is, the ash content ≤ 0.02 g / L.

[0042] Among them, the peanut shell powder mentioned in the present invention is obtained by crushing peanut shells; the melon seed shell powder mentioned is obtained by crushing melon seed shells, and the walnut shell powder mentioned is obtained by crushing walnut shells.

[0043] In one embodiment, the heating temperature is 115~140 °C, for example, it can be 115 °C, 118 °C, 120 °C, 125 °C, 128 °C, 130 °C, 132 °C, 135 °C, 138 °C, 140 °C or the range composed of any two of these values.

[0044] In one embodiment, the heating temperature is 125~135 °C.

[0045] In one embodiment, the mass ratio of the filter material to the catalytic cracking slurry is (0.1~1):100, for example, it can be 0.1:100, 0.2:100, 0.4:100, 0.5:100, 0.6:100, 0.8:100, 1:100 or the range composed of any two of these values.

[0046] The inventors of the present invention have found through research that due to different origins of crude oil and differences in the refining industry, the properties of the produced catalytic cracking slurry also have obvious differences, specifically manifested in different viscosities, densities, moisture contents, solid powder contents, and resin and asphaltene contents. These factors have a great influence on the screening of the optimal use conditions of the present invention, such as temperature and the addition amount of the filter material.

[0047] Among them, the viscosity (50 °C) of the catalytic cracking slurry described in the present invention is (150~2500) mm / s 2 , the ash content is (0.2~3.5)% (m / m), the density (20 °C) is (0.92~1.13) g / cm 3 , the moisture content is 0.01~1.0% (m / m). In the present invention, the ash content of the catalytic cracking slurry is measured by the method of "Determination of Ash in Petroleum Products" GB / T 508-1985.

[0048] In the present invention, by controlling the heating temperature to be 115 - 140 °C and the mass ratio of the filter material to the catalytic cracking slurry to be (0.1 - 1):100, the filter material and the catalytic cracking slurry have better affinity, and can better retain the ash on the surface of the filter material through electrostatic action and van der Waals force, and remove it through filtration, more effectively reducing the ash content in the catalytic cracking slurry.

[0049] In one embodiment, the average particle size of the filter material is 10 - 200 mesh, for example, it can be 10 mesh, 20 mesh, 40 mesh, 50 mesh, 60 mesh, 80 mesh, 100 mesh, 120 mesh, 150 mesh, 160 mesh, 180 mesh, 200 mesh or the range composed of any two of these values.

[0050] In one embodiment, the average particle size of the filter material is 10 - 100 mesh.

[0051] In one embodiment, the filter material includes first peanut shell powder, walnut shell powder and second peanut shell powder; satisfying: B / X 2 <A / X 3 +C / X 1 ;

[0052] Wherein, A mesh is the average particle size of the first peanut shell powder;

[0053] B mesh is the average particle size of the walnut shell powder;

[0054] C mesh is the average particle size of the second peanut shell powder;

[0055] X 1 % is the mass percentage of the first peanut shell powder in the filter material;

[0056] X 2 % is the mass percentage of the walnut shell powder in the filter material;

[0057] X 3 % is the mass percentage of the first peanut shell powder in the filter material.

[0058] The inventor of the present invention creatively found that by using a filter material composed of first peanut shell powder, walnut shell powder and second peanut shell powder, and controlling the average particle size and mass percentage of the first peanut shell powder, walnut shell powder and second peanut shell powder to satisfy: B / X 2 <A / X 3 +C / X 1 ​​The filter material has excellent compatibility and dispersibility in catalytic cracking oil slurry, can be evenly dispersed in the catalytic cracking oil slurry, can effectively improve the affinity between the filter material and the catalytic cracking oil slurry, and the filter material can better retain ash on the surface of the filter material through electrostatic action and van der Waals force, and the filter materials will not affect each other, reducing the occurrence of agglomeration, thereby effectively improving the ash removal effect.

[0059] The filter material has better affinity with the catalytic cracking oil slurry, and can better retain the ash on the filter material surface through electrostatic action and van der Waals force, and remove it through filtration, thereby more effectively reducing the ash content in the catalytic cracking oil slurry.

[0060] In one embodiment, the average particle size of the first peanut shell powder is 10 mesh ≤ A mesh ≤ 40 mesh.

[0061] In one embodiment, the average particle size of the walnut shell powder is 20 mesh ≤ B mesh ≤ 80 mesh.

[0062] In one embodiment, the average particle size of the second peanut shell powder is 80 mesh ≤ C mesh ≤ 100 mesh.

[0063] In one embodiment, the mass percentage of the first peanut shell powder in the filter material is 10%≤X 1 %≤30%.

[0064] In one embodiment, the mass percentage of the walnut shell powder in the filter material is 10%≤X 2 %≤30%.

[0065] In one embodiment, the mass percentage of the first peanut shell powder in the filter material is 40%≤X 3 %≤80%.

[0066] In one embodiment, A<B<C is satisfied.

[0067] In one embodiment, X1≤X2<X3 is satisfied.

[0068] It should be noted that the filtration described in the present invention can be carried out by pressurizing or decompressing the filtration; the production filtration can use automatic or non-automatic filtration equipment such as a plate and frame machine and a candle filter.

[0069] The following examples are provided to facilitate understanding of the present invention. These examples are not provided to limit the scope of the claims.

[0070] Example 1

[0071] A method for removing ash from catalytic cracking oil slurry comprises the following steps:

[0072] Add a filter material to the catalytic cracking slurry oil, heat it to 130 °C, stir, and perform vacuum filtration to obtain a purified slurry oil.

[0073] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0074] The mass ratio of the filter material to the catalytic cracking slurry oil is 0.3:100.

[0075] Example 2

[0076] A method for removing ash from catalytic cracking slurry oil includes the following steps:

[0077] Add a filter material to the catalytic cracking slurry oil, heat it to 130 °C, stir, and perform vacuum filtration to obtain a purified slurry oil.

[0078] The filter material is peanut shell powder with an average particle size of 80 mesh.

[0079] The mass ratio of the filter material to the catalytic cracking slurry oil is 0.3:100.

[0080] Example 3

[0081] A method for removing ash from catalytic cracking slurry oil includes the following steps:

[0082] Add a filter material to the catalytic cracking slurry oil, heat it to 130 °C, stir, and perform vacuum filtration to obtain a purified slurry oil.

[0083] The filter material is peanut shell powder with an average particle size of 10 mesh.

[0084] The mass ratio of the filter material to the catalytic cracking slurry oil is 0.3:100.

[0085] Example 4

[0086] A method for removing ash from catalytic cracking slurry oil includes the following steps:

[0087] Add a filter material to the catalytic cracking slurry oil, heat it to 130 °C, stir, and perform vacuum filtration to obtain a purified slurry oil.

[0088] The filter material is peanut shell powder with an average particle size of 100 mesh.

[0089] The mass ratio of the filter material to the catalytic cracking slurry oil is 0.3:100.

[0090] Example 5

[0091] A method for removing ash from catalytic cracking slurry oil includes the following steps:

[0092] Add a filter material to the catalytic cracking slurry oil, heat it to 130 °C, stir, and perform vacuum filtration to obtain a purified slurry oil.

[0093] The filter material is peanut shell powder with an average particle size of 200 mesh.

[0094] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0095] Example 6

[0096] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0097] Add a filter material to the catalytic cracking slurry, heat to 125 °C, stir, and perform vacuum filtration to obtain a purified slurry.

[0098] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0099] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0100] Example 7

[0101] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0102] Add a filter material to the catalytic cracking slurry, heat to 135 °C, stir, and perform vacuum filtration to obtain a purified slurry.

[0103] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0104] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0105] Example 8

[0106] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0107] Add a filter material to the catalytic cracking slurry, heat to 115 °C, stir, and perform vacuum filtration to obtain a purified slurry.

[0108] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0109] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0110] Example 9

[0111] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0112] Add a filter material to the catalytic cracking slurry, heat to 140 °C, stir, and perform vacuum filtration to obtain a purified slurry.

[0113] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0114] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0115] Example 10

[0116] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0117] Add a filter material to the catalytic cracking slurry, heat to 105 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0118] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0119] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0120] Example 11

[0121] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0122] Add a filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0123] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0124] The mass ratio of the filter material to the catalytic cracking slurry is 0.5:100.

[0125] Example 12

[0126] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0127] Add a filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0128] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0129] The mass ratio of the filter material to the catalytic cracking slurry is 0.1:100.

[0130] Example 13

[0131] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0132] Add a filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0133] The filter material is peanut shell powder with an average particle size of 60 mesh.

[0134] The mass ratio of the filter material to the catalytic cracking slurry is 0.05:100.

[0135] Example 14

[0136] A method for removing ash from catalytic cracking slurry oil, comprising the following steps:

[0137] Add a filter medium to the catalytic cracking slurry oil, heat to 130 °C, stir, and perform vacuum filtration to obtain purified slurry oil.

[0138] The filter medium is sunflower seed shell powder with an average particle size of 60 mesh.

[0139] The mass ratio of the filter medium to the catalytic cracking slurry oil is 0.3:100.

[0140] Example 15

[0141] A method for removing ash from catalytic cracking slurry oil, comprising the following steps:

[0142] Add a filter medium to the catalytic cracking slurry oil, heat to 130 °C, stir, and perform vacuum filtration to obtain purified slurry oil.

[0143] The filter medium is walnut shell powder with an average particle size of 60 mesh.

[0144] The mass ratio of the filter medium to the catalytic cracking slurry oil is 0.3:100.

[0145] Example 16

[0146] A method for removing ash from catalytic cracking slurry oil, comprising the following steps:

[0147] Add a filter medium to the catalytic cracking slurry oil, heat to 130 °C, stir, and perform vacuum filtration to obtain purified slurry oil.

[0148] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 100 mesh.

[0149] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0150] The mass ratio of the filter medium to the catalytic cracking slurry oil is 0.3:100.

[0151] Example 17

[0152] A method for removing ash from catalytic cracking slurry oil, comprising the following steps:

[0153] Add a filter medium to the catalytic cracking slurry oil, heat to 130 °C, stir, and perform vacuum filtration to obtain purified slurry oil.

[0154] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 20 mesh; the average particle size of the walnut shell powder is 40 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0155] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0156] The mass ratio of the filter medium to the catalytic cracking slurry is 0.3:100.

[0157] Example 18

[0158] A method for removing ash from catalytic cracking slurry includes the following steps:

[0159] Add the filter medium to the catalytic cracking slurry, heat to 130 °C, stir, and perform vacuum filtration to obtain purified slurry.

[0160] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 10 mesh; the average particle size of the walnut shell powder is 20 mesh, and the average particle size of the second peanut shell powder is 100 mesh.

[0161] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0162] The mass ratio of the filter medium to the catalytic cracking slurry is 0.3:100.

[0163] Example 19

[0164] A method for removing ash from catalytic cracking slurry includes the following steps:

[0165] Add the filter medium to the catalytic cracking slurry, heat to 130 °C, stir, and perform vacuum filtration to obtain purified slurry.

[0166] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0167] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0168] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0169] Example 20

[0170] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0171] Add a filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0172] The filter material includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 20 mesh; the average particle size of the walnut shell powder is 20 mesh, and the average particle size of the second peanut shell powder is 100 mesh.

[0173] The mass percentage of the first peanut shell powder in the filter material is 20%; the mass percentage of the walnut shell powder in the filter material is 20%; the mass percentage of the second peanut shell powder in the filter material is 60%.

[0174] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0175] Example 21

[0176] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0177] Add a filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0178] The filter material includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 40 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0179] The mass percentage of the first peanut shell powder in the filter material is 20%; the mass percentage of the walnut shell powder in the filter material is 20%; the mass percentage of the second peanut shell powder in the filter material is 60%.

[0180] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0181] Example 22

[0182] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0183] Add a filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain a purified slurry.

[0184] The filter medium includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 80 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0185] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0186] The mass ratio of the filter medium to the catalytic cracking slurry is 0.3:100.

[0187] Example 23

[0188] A method for removing ash from catalytic cracking slurry includes the following steps:

[0189] Add the filter medium to the catalytic cracking slurry, heat to 130°C, stir, and perform vacuum filtration to obtain purified slurry.

[0190] The filter medium includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0191] The mass percentage of the first peanut shell powder in the filter medium is 10%; the mass percentage of the walnut shell powder in the filter medium is 30%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0192] The mass ratio of the filter medium to the catalytic cracking slurry is 0.3:100.

[0193] Example 24

[0194] A method for removing ash from catalytic cracking slurry includes the following steps:

[0195] Add the filter medium to the catalytic cracking slurry, heat to 130°C, stir, and perform vacuum filtration to obtain purified slurry.

[0196] The filter medium includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0197] The mass percentage of the first peanut shell powder in the filter medium is 30%; the mass percentage of the walnut shell powder in the filter medium is 30%; the mass percentage of the second peanut shell powder in the filter medium is 40%.

[0198] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0199] Example 25

[0200] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0201] Add filter material to the catalytic cracking slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified slurry.

[0202] The filter material includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0203] The mass percentage of the first peanut shell powder in the filter material is 20%; the mass percentage of the walnut shell powder in the filter material is 10%; the mass percentage of the second peanut shell powder in the filter material is 70%.

[0204] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0205] Example 26

[0206] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0207] Add filter material to the catalytic cracking slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified slurry.

[0208] The filter material includes first peanut shell powder, walnut shell powder, and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0209] The mass percentage of the first peanut shell powder in the filter material is 30%; the mass percentage of the walnut shell powder in the filter material is 20%; the mass percentage of the second peanut shell powder in the filter material is 50%.

[0210] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0211] Example 27

[0212] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0213] Add filter material to the catalytic cracking slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified slurry.

[0214] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 60 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0215] The mass percentage of the first peanut shell powder in the filter medium is 10%; the mass percentage of the walnut shell powder in the filter medium is 10%; the mass percentage of the second peanut shell powder in the filter medium is 80%.

[0216] The mass ratio of the filter medium to the catalytic cracking slurry is 0.3:100.

[0217] Example 28

[0218] A method for removing ash from catalytic cracking slurry includes the following steps:

[0219] Add the filter medium to the catalytic cracking slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified slurry.

[0220] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 40 mesh; the average particle size of the walnut shell powder is 100 mesh, and the average particle size of the second peanut shell powder is 60 mesh.

[0221] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0222] The mass ratio of the filter medium to the catalytic cracking slurry is 0.3:100.

[0223] Example 29

[0224] A method for removing ash from catalytic cracking slurry includes the following steps:

[0225] Add the filter medium to the catalytic cracking slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified slurry.

[0226] The filter medium includes first peanut shell powder, walnut shell powder and second peanut shell powder; the average particle size of the first peanut shell powder is 60 mesh; the average particle size of the walnut shell powder is 100 mesh, and the average particle size of the second peanut shell powder is 80 mesh.

[0227] The mass percentage of the first peanut shell powder in the filter medium is 20%; the mass percentage of the walnut shell powder in the filter medium is 20%; the mass percentage of the second peanut shell powder in the filter medium is 60%.

[0228] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0229] Comparative Example 1

[0230] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0231] Add filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain purified slurry.

[0232] The filter material is wood powder with an average particle size of 60 mesh.

[0233] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0234] Comparative Example 2

[0235] A method for removing ash from catalytic cracking slurry, comprising the following steps:

[0236] Add filter material to the catalytic cracking slurry, heat to 130 °C, stir, and filter under reduced pressure to obtain purified slurry.

[0237] The filter material is peanut shell powder and polyester filter material with a mass ratio of 1:1 and an average particle size of 60 mesh.

[0238] The mass ratio of the filter material to the catalytic cracking slurry is 0.3:100.

[0239] Among them, the average particle size and composition of the filter materials in Examples 19 to 32 are shown in Table 1.

[0240] Table 1

[0241]

[0242] Test Example

[0243] The catalytic cracking slurry with an ash content of 0.368% is deashed according to the examples and comparative examples, and the filtration time and the ash content of the purified slurry are recorded.

[0244] The ash content of the catalytic cracking slurry is measured by the method of "Determination of Ash in Petroleum Products" GB / T 508-1985.

[0245] Table 2

[0246]

[0247] It can be seen from Table 1 that the method of the present invention can effectively solve the problems of long ash removal time and poor effect in catalytic cracking slurry, can quickly remove ash, has a fast filtration speed, has the characteristics of low cost and easy operation, and has broad industrialization prospects.

[0248] By adjusting the ratio of slurry and filter material and selecting the particle size of the filter material, different purification degrees of the slurry can be achieved in the present invention, which can fully meet the requirements of high-standard marine fuel oil, needle coke, environmentally friendly rubber oil, etc. The filter material of the invention is a renewable environmentally friendly biological filter material.

[0249] 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 the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for removing ash from catalytic cracking oil slurry, characterized in that: The following steps are involved: Adding filter material to the catalytic cracking oil slurry, heating, stirring, filtering, and obtaining purified oil slurry; The filter material includes first peanut shell powder, walnut shell powder and second peanut shell powder; satisfying: B / X2<A / X3+C / X1; Wherein, A mesh is the average particle size of the first peanut shell powder, 10 mesh ≤ A mesh ≤ 40 mesh; B mesh is the average particle size of the walnut shell powder, 20 mesh ≤ B mesh ≤ 80 mesh; C mesh is the average particle size of the second peanut shell powder, 80 mesh ≤ C mesh ≤ 100 mesh; X1% is the mass percentage of the first peanut shell powder in the filter material, 10%≤X1%≤30%; X2% is the mass percentage of the walnut shell powder in the filter material, 10%≤X2%≤30%; X3% is the mass percentage of the second peanut shell powder in the filter material, and 40%≤X3%≤80%.

2. The method for removing ash from catalytic cracking oil slurry according to claim 1, characterized in that: The heating temperature is 115-140°C.

3. The method for removing ash from catalytic cracking oil slurry according to claim 2, characterized in that: The heating temperature is 125-135°C.

4. The method for removing ash from catalytic cracking oil slurry according to claim 1, characterized in that: The mass ratio of the filter material to the catalytic cracking oil slurry is (0.1-1):

100.

5. The method for removing ash from catalytic cracking oil slurry according to claim 1, characterized in that: Satisfies: A<B<C.

6. The method for removing ash from catalytic cracking oil slurry according to claim 1, characterized in that: Satisfies: X1≤X2<X3.

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