Method for removing ash content of catalytic cracking oil slurry

Abstract

The invention discloses a method for removing ash in catalytic cracking oil slurry, which belongs to the technical field of petrochemical engineering and comprises the following steps: adding a filter material into the catalytic cracking oil slurry, heating, stirring and filtering to obtain purified oil slurry; the filter material comprises at least one of peanut shell powder, melon seed shell powder and walnut shell powder. By adopting the biological carbon source filter material, the problems of long deashing time and poor effect in catalytic cracking oil slurry can be effectively solved, deashing can be quickly carried out, and the method has the characteristics of high filtering speed, good quality of filtered purified oil slurry and loose filter residues, has the characteristics of low cost and easiness in operation, and has a wide industrial prospect.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical industry, and in particular to a method for removing ash from catalytic cracking oil slurry. Background Art

[0002] Catalytic cracking oil slurry is a semi-solid or liquid substance produced during the catalytic cracking of petroleum. In the process of petroleum refining, catalytic cracking technology is usually used to convert heavy oil into light oil. In this process, the raw oil contacts the catalyst under high temperature and high pressure, and a cracking reaction occurs to produce light oil products (such as gasoline, diesel) and gas, while producing catalytic cracking oil slurry as a by-product.

[0003] Catalytic cracking oil slurry is a mixture with a very complex composition, and its main components are large molecular weight alkanes, olefins and aromatics, and also contain heteroatom compounds such as sulfur, nitrogen, oxygen and extremely small amounts of metal compounds (in the form of salts or metal compounds). In addition, the oil slurry also contains a certain amount of catalyst residues, which restricts its application in downstream products, such as residual marine fuel oil, needle coke production raw materials, etc. Therefore, the industry is looking for low-cost, simple process and equipment, easy operation, and environmentally friendly desolidification technology. At present, the common methods for desolidification of catalytic cracking oil slurry in industry are: sedimentation separation method, filtration separation method, electrostatic separation method, centrifugal separation method. CN97121100.0A discloses a method for separating and purifying catalytic cracking externally thrown oil slurry with a high-temperature centrifugal separator. The centrifugal separation method disclosed therein has high separation efficiency and can remove solid particles>10μm, but the equipment is complex, the operation and maintenance are inconvenient, and the processing volume is not large. There is no industrial application example. The natural sedimentation method has simple equipment, low operating cost and easy operation, but it relies solely on gravity sedimentation, which has low efficiency, long cycle and poor purification effect, making it difficult to apply on a large scale in industry. The electrical separation method has low separation temperature, high separation efficiency, relatively easy flushing and small resistance, but there are many factors affecting the separation, the equipment is too complicated, the cost is high and the process is complicated. CN01113133.0A discloses a method for separating catalyst powder in catalytic cracking oil slurry by sedimentation, which has high separation efficiency, high yield of refined oil, low cost and considerable economic benefits, but has certain requirements for the selection of sedimentation agents and complex equipment.

[0004] CN01113134.9A discloses a method for separating catalyst powder from catalytic cracking oil slurry by water washing and sedimentation. The water washing separation method disclosed in the method is a further optimization and research after the successful industrial application of flocculation and sedimentation method. It can reduce the number of slag cleaning times in oil tanks and reduce the labor intensity of workers. However, the technology has a high requirement for the density of catalytic oil slurry, which is required to be less than 0.96g / cm 3The high temperature filtration method disclosed in CN9109217.1A is simple to operate, requires little investment, has a stable separation effect, and is highly adaptable to raw materials. However, the filter residue backwashing time is long, the filtration resistance is large, and it is difficult to remove micron-sized particles by ordinary filtration.

[0005] In view of this, this application is filed. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for removing ash from catalytic cracking oil slurry, which can effectively solve the problem of long time and poor effect of deashing in catalytic cracking oil slurry, can quickly deash, has the characteristics of fast filtration speed, low cost and easy operation, and has broad industrial prospects.

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

[0008] A method for removing ash from catalytic cracking oil slurry comprises the following steps: adding filter material to the catalytic cracking oil slurry, heating, stirring, filtering, and obtaining purified oil 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 implementation scheme of the present application, the mass ratio of the filter material to the catalytic cracking oil slurry is (0.1-1):100.

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

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

[0015] As an embodiment of the present application, the filter material includes a first peanut shell powder, a walnut shell powder and a second peanut shell powder; satisfying: B / X2<A / X3+C / X1;

[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] X2% is the mass percentage of the walnut shell powder in the filter material;

[0021] X3% 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%≤X1%≤30%.

[0026] As an embodiment of the present application, the mass percentage of the walnut shell powder in the filter material is 10%≤X2%≤30%.

[0027] As an embodiment of the present application, the mass percentage of the first peanut shell powder in the filter material is 40%≤X3%≤80%.

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

[0029] As an implementation scheme 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, and the peanut shells, melon seed shells, and walnut shells have a strong affinity for ash. The ash is retained on the surface of the filter material through electrostatic action and van der Waals force, and is removed by filtration. The oil slurry is desolidified using a renewable biological carbon source, which 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 DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0032] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0033] In this application, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0034] In the present application, there is no particular limitation on the specific dispersion and stirring treatment methods.

[0035] Unless otherwise specified, the components, 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 components and raw materials used in each parallel experiment are all of the same kind.

[0036] The embodiment of the present application provides a method for removing ash from catalytic cracking oil slurry, comprising the following steps: adding filter material to the catalytic cracking oil slurry, heating, stirring, filtering, and obtaining purified oil 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. The ash is retained on the surface of the filter material through electrostatic action and van der Waals force and is removed by filtration. The oil slurry is desolidified using a renewable biological carbon source. The method 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 adopts biological carbon source filter material, which can effectively solve the problem of long time and poor effect of deashing in catalytic cracking oil slurry, can quickly deash, has the characteristics of fast filtration speed, good quality of purified oil slurry after filtration, loose filter residue, low cost and easy operation, and has broad industrial prospects.

[0040] The present invention adopts biological carbon source filter materials such as peanut shell powder, melon seed shell powder, and walnut shell powder, which can realize waste recycling and is beneficial to environmental protection. The production process of the filter material has no waste gas, waste liquid, waste solid, and odor emissions, and the slag cleaning work is completed through automatic filtering equipment.

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

[0042] The peanut shell powder mentioned in the present invention is obtained by crushing peanut shells; the melon seed shell powder mentioned in the present invention is obtained by crushing melon seed shells; and the walnut shell powder mentioned in the present invention 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 a range consisting of any two of the 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 oil 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 a range consisting of any two of these values.

[0046] The inventors of the present invention have found that due to the different origins of crude oil and differences in the oil refining industry, the properties of the catalytic cracking slurry produced are also significantly different, specifically in terms of viscosity, density, moisture, solid powder content, and colloid asphaltene content. These factors have a great influence on the screening of the optimal use conditions required for the present invention, such as temperature and the amount of filter material added.

[0047] The viscosity of the catalytic cracking slurry of the present invention (50°C) is (150-2500) mm / s 2 , ash content is (0.2~3.5)% (m / m), density (20℃) 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 oil slurry is measured by the method of "Determination of Ash Content of Petroleum Products" GB / T508-1985.

[0048] The present invention controls the heating temperature to be 115-140°C and the mass ratio of the filter material to the catalytic cracking oil slurry to be (0.1-1):100, so that the filter material and the catalytic cracking oil slurry have better affinity, and can better retain ash on the surface of the filter material 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.

[0049] In one embodiment, the average particle size of the filter material is 10 to 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 a range consisting of any two values ​​therein.

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

[0051] In one embodiment, the filter material includes a first peanut shell powder, a walnut shell powder, and a second peanut shell powder; satisfying: B / X2<A / X3+C / X1;

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

[0056] X2% is the mass percentage of the walnut shell powder in the filter material;

[0057] X3% is the mass percentage of the first peanut shell powder in the filter material.

[0058] The inventors of the present invention creatively discovered that by using a filter material composed of a first peanut shell powder, a walnut shell powder and a second peanut shell powder, and controlling the average particle size and mass percentage of the first peanut shell powder, the walnut shell powder and the second peanut shell powder to satisfy: B / X2<A / X3+C / X1; the filter material has excellent compatibility and dispersibility in the catalytic cracking oil slurry, can be evenly dispersed in the catalytic cracking oil slurry, can effectively improve the affinity of the filter material and the catalytic cracking oil slurry, 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 to the filter material is 10%≤X1%≤30%.

[0064] In one embodiment, the mass percentage of the walnut shell powder to the filter material is 10%≤X2%≤30%.

[0065] In one embodiment, the mass percentage of the first peanut shell powder to the filter material is 40%≤X3%≤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 filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0075] Example 2

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

[0077] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0080] Example 3

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

[0082] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0085] Example 4

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

[0087] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0090] Example 5

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

[0092] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0095] Example 6

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

[0097] Add filter material to the catalytic cracking oil slurry, heat to 125°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0100] Example 7

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

[0102] Add filter material to the catalytic cracking oil slurry, heat to 135°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0105] Example 8

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

[0107] Add filter material to the catalytic cracking oil slurry, heat to 115°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0110] Example 9

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

[0112] Add filter material to the catalytic cracking oil slurry, heat to 140°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0115] Example 10

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

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

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

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

[0120] Embodiment 11

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

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

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

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

[0125] Example 12

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

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

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

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

[0130] Embodiment 13

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

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

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

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

[0135] Embodiment 14

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

[0137] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0138] The filter material is melon seed shell powder with an average particle size of 60 meshes.

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

[0140] Embodiment 15

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

[0142] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

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

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

[0145] Example 16

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

[0147] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0148] 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 meshes; the average particle size of the walnut shell powder is 60 meshes, and the average particle size of the second peanut shell powder is 100 meshes.

[0149] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0151] Embodiment 17

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

[0153] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0154] 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 meshes; the average particle size of the walnut shell powder is 40 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[0155] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0157] Embodiment 18

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

[0159] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0160] 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 10 meshes; the average particle size of the walnut shell powder is 20 meshes, and the average particle size of the second peanut shell powder is 100 meshes.

[0161] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0163] Embodiment 19

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

[0165] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0166] 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 meshes; the average particle size of the walnut shell powder is 60 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[0167] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0169] Embodiment 20

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

[0171] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil 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 meshes; the average particle size of the walnut shell powder is 20 meshes, and the average particle size of the second peanut shell powder is 100 meshes.

[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%; and 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 oil slurry is 0.3:100.

[0175] Embodiment 21

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

[0177] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil 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 meshes; the average particle size of the walnut shell powder is 40 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[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%; and 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 oil slurry is 0.3:100.

[0181] Embodiment 22

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

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

[0184] 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 meshes; the average particle size of the walnut shell powder is 80 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[0185] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0187] Embodiment 23

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

[0189] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0190] 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 meshes; the average particle size of the walnut shell powder is 60 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

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

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

[0193] Embodiment 24

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

[0195] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil slurry.

[0196] 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 meshes; the average particle size of the walnut shell powder is 60 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[0197] 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 30%; and the mass percentage of the second peanut shell powder in the filter material is 40%.

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

[0199] Embodiment 25

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

[0201] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil 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 meshes; the average particle size of the walnut shell powder is 60 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[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%; and 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 oil slurry is 0.3:100.

[0205] Embodiment 26

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

[0207] Add filter material to the catalytic cracking oil slurry, heat to 130°C, stir, and filter under reduced pressure to obtain purified oil 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 30 meshes; the average particle size of the walnut shell powder is 20 meshes, and the average particle size of the second peanut shell powder is 50 meshes.

[0209] 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%; and the mass percentage of the second peanut shell powder in the filter material is 70%.

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

[0211] Embodiment 27

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

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

[0214] 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 30 meshes; the average particle size of the walnut shell powder is 20 meshes, and the average particle size of the second peanut shell powder is 50 meshes.

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

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

[0217] Embodiment 28

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

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

[0220] 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 meshes; the average particle size of the walnut shell powder is 100 meshes, and the average particle size of the second peanut shell powder is 60 meshes.

[0221] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0223] Embodiment 29

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

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

[0226] 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 60 meshes; the average particle size of the walnut shell powder is 100 meshes, and the average particle size of the second peanut shell powder is 80 meshes.

[0227] 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%; and the mass percentage of the second peanut shell powder in the filter material is 60%.

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

[0229] Comparative Example 1

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

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

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

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

[0234] Comparative Example 2

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

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

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

[0239] The average particle size and composition of the filter media of Examples 19 to 32 are shown in Table 1.

[0240] Table 1

[0241]

[0242]

[0243] Test Case

[0244] Catalytic cracking slurry with an ash content of 0.368% was deashed according to the examples and comparative examples, and the filtration time and the ash content of the purified slurry were recorded.

[0245] The ash content of the catalytic cracking oil slurry is measured using the method of "Determination of Ash Content of Petroleum Products" GB / T508-1985.

[0246] Table 2

[0247]

[0248]

[0249] As can be seen from Table 1, the method described in the present invention can effectively solve the problem of long time and poor effect of deashing in catalytic cracking oil slurry, can quickly deash, has the characteristics of fast filtration speed, low cost and easy operation, and has broad industrial prospects.

[0250] By contrast, the invention achieves different purification levels of slurry by adjusting the ratio of slurry oil to filter material and selecting the particle size of the filter material, which can fully meet the requirements of high-standard marine oil, needle coke, environmentally friendly rubber oil, etc. The filter material of the invention is a renewable environmentally friendly biological filter material.

[0251] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution 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 at least one of peanut shell powder, melon seed shell powder and walnut shell powder.

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: The average particle size of the filter material is 10 to 200 meshes.

6. The method for removing ash from catalytic cracking oil slurry according to claim 1, characterized in that: The average particle size of the filter material is 10 to 100 meshes.

7. The method for removing ash from catalytic cracking oil slurry according to claim 1, characterized in that: 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; B mesh is the average particle size of the walnut shell powder; C mesh is the average particle size of the second peanut shell powder; X1% is the mass percentage of the first peanut shell powder in the filter material; X2% is the mass percentage of the walnut shell powder in the filter material; X3% is the mass percentage of the first peanut shell powder in the filter material.

8. The method for removing ash from catalytic cracking oil slurry according to claim 7, characterized in that: Satisfy at least one of the following (a) to (f): (a) the average particle size of the first peanut shell powder is 10 mesh ≤ A mesh ≤ 40 mesh; (b) the average particle size of the walnut shell powder is 20 mesh ≤ B mesh ≤ 80 mesh; (c) the average particle size of the second peanut shell powder is 80 mesh ≤ C mesh ≤ 100 mesh; (d) the mass percentage of the first peanut shell powder to the filter material is 10%≤X1%≤30%; (e) the mass percentage of the walnut shell powder in the filter material is 10%≤X2%≤30%; (f) The mass percentage of the first peanut shell powder to the filter material is 40%≤X3%≤80%.

9. The method for removing ash from catalytic cracking oil slurry according to claim 7, characterized in that: Satisfies: A<B<C.

10. The method for removing ash from catalytic cracking oil slurry according to claim 7, characterized in that: Satisfies: X1≤X2<X3.

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