A residual oil hydroprotectant prepared from coal gangue and its preparation method

Abstract

This invention provides a method for preparing a residual oil hydrotreating protectant derived from coal gangue, and the method thereof. The residual oil hydrotreating protectant comprises, by weight, 1-40% coal gangue, 5-40% kaolin, 20-40% alumina powder, and 0.1-5% auxiliary materials. The preparation method includes: mixing powdered and liquid raw materials separately according to a set ratio to obtain mixed powder and mixed liquid; adding the mixed liquid to the mixed powder and stirring to obtain a slurry; vacuum refining the slurry to obtain vacuum-refined slurry segments, and aging them to obtain aged slurry segments; extruding the aged slurry segments to obtain a protectant blank, and drying it to obtain a dried blank; calcining the dried blank to obtain a protectant carrier, and then impregnating the protectant carrier with an active metal soluble salt solution, drying the components, and calcining to activate it to obtain the residual oil hydrotreating protectant. This invention achieves the recycling and utilization of coal gangue.

Description

Technical Field

[0001] This invention relates to the field of chemical technology, and in particular to a residual oil hydrogenation protective agent prepared from coal gangue and its preparation method. Background Technology

[0002] Coal gangue is a solid waste generated during coal mining and washing, and is generally stored in stockpiles. my country's cumulative coal gangue stockpiles have reached 7 billion tons, and are increasing at a rate of 150 million tons per year, covering an area of ​​approximately 70 km². 2 This accounts for approximately 6.79% of the country's arable land. Furthermore, the storage and disposal of coal gangue can cause spontaneous combustion, acid rain, underground seepage, river siltation, photochemical smog, and mudslides. Therefore, the reuse and resource recovery of coal gangue is imperative.

[0003] Coal gangue is a mixture of various minerals and rocks, mainly including claystones, sandstones, carbonates, and aluminous rocks. Claystones constitute a significant proportion of coal gangue, especially carbonaceous shale, argillaceous shale, and silty shale. The main mineral components of coal gangue are clay minerals, such as kaolinite, montmorillonite, and illite, followed by quartz, feldspar, mica, and pyrite. The chemical composition of coal gangue is mainly inorganic and organic matter. The inorganic matter is mainly SiO2 (30%–65%) and Al2O3 (15%–40%), followed by Fe2O3, CaO, MgO, Na2O, K2O, SO3, and some Ti, Ga, Co, Cu, Zn, Mn, and Mo. The main organic element in coal gangue is carbon (C).

[0004] Currently, coal gangue is widely used in the recovery of useful components, wastewater treatment, as a building material, agricultural production, backfilling and reclamation, and power generation. Furthermore, in recent years, with increasing societal demands for environmental protection, the market competition for hydrogenation catalysts has become increasingly fierce. This situation requires researchers to focus on improving catalyst performance while continuously reducing processing costs to meet increasingly stringent market demands during catalyst research and development. Therefore, there is an urgent need to propose a residual oil hydrogenation protective agent prepared from coal gangue and its preparation method. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a method for preparing a residual oil hydrogenation protective agent obtained from coal gangue, and the method thereof, with the aim of realizing the reuse of coal gangue.

[0006] The embodiments of the present invention are implemented as follows:

[0007] A residual oil hydroprotectant prepared from coal gangue comprises the following components by weight:

[0008] Coal gangue 1-40%, kaolin 5-40%, alumina powder 20-40%, auxiliary materials 0.1-5%.

[0009] Furthermore, in the above-mentioned residual oil hydrogenation protective agent prepared from coal gangue, the alumina powder is a mixture of boehmite and macroporous powder.

[0010] Furthermore, in the above-mentioned residual oil hydrogenation protective agent prepared from coal gangue, the kaolin is calcined kaolin.

[0011] Furthermore, in the above-mentioned residual oil hydroprotectant prepared from coal gangue, the auxiliary materials are adhesives, binders, lubricants, and plasticizers.

[0012] Furthermore, in the above-mentioned residual oil hydrogenation protective agent prepared from coal gangue, the colloidal solvent is one or more of citric acid, acetic acid, and hydrochloric acid.

[0013] Furthermore, in the above-mentioned residual oil hydrogenation protective agent prepared from coal gangue, the lubricant is one or a combination of several of glycerin, tung oil, and guar gum, and the amount of the lubricant used is 1%-5%.

[0014] Furthermore, in the above-mentioned residual oil hydroprotectant prepared from coal gangue, the plasticizer is one or more combinations of PEG and PVA.

[0015] Furthermore, in the above-mentioned residual oil hydroprotectant prepared from coal gangue, the binder is one or more combinations of HPMC, CMC, gelatin, and amylopectin, and the amount of the binder is 1%-5%.

[0016] Another object of the present invention is to provide a method for preparing a residual oil hydrotreating protectant obtained from coal gangue, for use in preparing the above-mentioned residual oil hydrotreating protectant, the method comprising:

[0017] The powder raw materials and liquid raw materials are mixed according to the set ratio to obtain mixed powder and mixed liquid respectively;

[0018] The liquid mixture is added to the powder mixture and stirred to obtain a mud.

[0019] The mud material is subjected to vacuum refining to obtain vacuum-refined mud segments, and the mud segments are then aged to obtain aged mud segments.

[0020] The aged mud segments are extruded to obtain a protective agent blank, and then dried to a moisture content of less than 3% to obtain a dried blank.

[0021] The dried green body is calcined to obtain a protective agent carrier, and the protective agent carrier is impregnated in an active metal soluble salt solution, dried, and then calcined and activated to obtain a residue oil hydrogenation protective agent.

[0022] Furthermore, in the above-mentioned method for preparing the residual oil hydrotreating protective agent obtained from coal gangue, the soluble salt of active metals such as Mo / Ni loaded with Mo is molybdenum trioxide and basic nickel carbonate or nickel nitrate.

[0023] This invention uses coal gangue, kaolin, and dry adhesive powder as main raw materials, with one or more of citric acid, acetic acid, and hydrochloric acid as solvents, one or more of HPMC, CMC, gelatin, and amylopectin as binders, one or more of glycerin, tung oil, and guar gum as lubricants, and one or more of PEG and PVA as plasticizers. Residue oil hydrotreating agents are prepared using extrusion molding equipment, including but not limited to honeycomb, clover, four-leaf clover, butterfly, cylindrical, and Raschig ring five-toothed ball shapes. After molding and calcination, the agents are impregnated with a solution of soluble active metals such as Mo / Ni, dried, and then calcined to activate the hydrotreating agent, thus realizing the reuse of coal gangue.

[0024] In addition, the present invention has at least the following beneficial effects:

[0025] 1. Because the organic matter in coal gangue is turned into gas and discharged during the calcination process, the residue oil hydrotreating protectant produced has abundant micropores and an increased specific surface area, which can reduce the use of pore-forming agents.

[0026] 2. By utilizing coal gangue to prepare residual oil hydrogenation protective agents, resources are saved, the environment is greatly protected, and production costs are reduced, which is conducive to enterprises reducing costs and increasing efficiency. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description will be given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] This invention aims to prepare a residual oil hydrotreating protectant using coal gangue, and proposes a method for preparing the same protectant from coal gangue. The method includes:

[0031] The residual oil hydroprotectant prepared from coal gangue comprises, by weight, the following raw materials:

[0032] Coal gangue 1-40%, kaolin 5-40%, alumina powder 20-40%, auxiliary materials 0.1-5%.

[0033] As an example and not a limitation, in this embodiment, the alumina powder is a mixture of boehmite and macroporous powder. Specifically, the kaolin is common kaolin or calcined kaolin.

[0034] The auxiliary materials include adhesives, binders, lubricants, and plasticizers. Specifically, the adhesive is one or more combinations of citric acid, acetic acid, and hydrochloric acid; the lubricant is one or more combinations of glycerin, tung oil, and guar gum, with a usage of 1%–5%; the plasticizer is one or more combinations of PEG and PVA; and the binder is one or more combinations of HPMC, CMC, gelatin, and amylopectin, with a usage of 1%–5%.

[0035] Understandably, using coal gangue, kaolin, and dry adhesive powder as main raw materials, and one or more of citric acid, acetic acid, hydrochloric acid, etc. as adhesive solvents, one or more of HPMC, CMC, gelatin, amylopectin, etc. as binders, one or more of glycerin, tung oil, guar gum, etc. as lubricants, and one or more of PEG, PVA, etc. as plasticizers, a residual oil hydrogenation protectant can be prepared from coal gangue, thus realizing the preparation of residual oil hydrogenation protectant using coal gangue.

[0036] On the other hand, the present invention provides a method for preparing a residual oil hydroprotectant obtained from coal gangue, used to prepare the aforementioned residual oil hydroprotectant, the preparation method comprising:

[0037] The powder raw materials and liquid raw materials are mixed according to the set ratio to obtain mixed powder and mixed liquid respectively;

[0038] Among them, a kneader can be used to mix powder raw materials to obtain mixed powder, and liquid raw materials can be manually mixed to obtain mixed liquid.

[0039] The liquid mixture is added to the powder mixture and stirred to obtain a mud.

[0040] Specifically, mixed powder raw materials are mixed with artificially mixed liquid raw materials under the stirring conditions of a kneader to obtain mud.

[0041] The mud material is subjected to vacuum refining to obtain vacuum-refined mud segments, and the mud segments are then aged to obtain aged mud segments.

[0042] The aged mud segments are extruded to obtain a protective agent blank, and then dried to a moisture content of less than 3% to obtain a dried blank.

[0043] The dried green body is calcined to obtain a protective agent carrier, and the protective agent carrier is impregnated in a solution containing soluble salts of active metals, dried, and then calcined and activated to obtain a residue oil hydroprotective agent.

[0044] To facilitate understanding of the present invention, a more complete description will be given below with reference to relevant embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0045] Example 1

[0046] A residual oil hydroprotectant prepared from coal gangue, comprising the following raw materials: dry adhesive powder, kaolin, and coal gangue in weight parts of 30, 40, and 40, respectively; and adhesive, binder, plasticizer, lubricant, and water in weight parts of 4, 3, 2, 2, and 55, respectively.

[0047] The impregnation solution is a self-made Mo-Ni-P system, with molybdenum trioxide, nickel oxide, and elemental phosphorus content of 24%, 4.8%, and 2.1% respectively by mass. The raw materials for the impregnation solution are molybdenum trioxide, basic nickel carbonate with a nickel content of 40%, and industrial phosphoric acid with a mass fraction of 85%, and a density of 1.5 g / cm³ at 25°C. 3 .

[0048] The dry adhesive powder consists of boehmite and macroporous dry adhesive powder, wherein the boehmite comprises 10 parts and the macroporous dry adhesive powder comprises 20 parts. The specific surface area, pore volume, and dry basis of the boehmite are 400 m². 2 / g, 0.3ml / g, 68%, the specific surface area and pore volume of the macroporous dry adhesive powder are: 500m² 2 / g, 1.4ml / g, 70%.

[0049] The kaolin has a D50 of 1.8 μm, a D90 of 3.2 μm, and a dry basis weight of 99.5%.

[0050] The coal gangue has a D50 of 10 μm, a D90 of 15 μm, a carbon content of 12.5%, a SiO2 content of 42.3%, an Al2O3 content of 39.1%, a loss on ignition of 17.5%, and a specific surface area of ​​100 m². 2 / g.

[0051] The adhesive solvent is citric acid and acetic acid in parts by weight of 1.5 parts and 2.5 parts, respectively.

[0052] The adhesive is HPMC-7000.

[0053] The plasticizer is a PVA-1750 solution, which is an aqueous solution with a mass fraction of 20% PVA-1750.

[0054] The lubricant is glycerin.

[0055] The preparation method of the residue hydrotreating protectant described in this embodiment includes the following steps:

[0056] (1) Weigh the dry adhesive powder, kaolin, coal gangue, and adhesive according to the weight parts, and mix the powder in a kneader for 30 minutes to make the powder evenly mixed;

[0057] (2) Weigh out the adhesive solvent, plasticizer, lubricant and water according to the weight ratio and stir manually for 3 minutes to make the liquid evenly mixed. Then add it evenly to the powder in step (1) and knead for 40 minutes to obtain a clay with good plasticity.

[0058] (3) After vacuum refining the mud obtained in step (2), it is aged for 24 hours and then extruded into a blank using a clover mold with a diameter of 3 mm; the vacuum degree of the vacuum refining is above 0.9 atm.

[0059] (4) The blank obtained in step (3) is dried, cut into strips and calcined in sequence to obtain a protective agent carrier; the drying temperature is 120℃ and the final moisture content is 15%; the strip length is controlled to be 2-8mm ≥ 85% when the strip is cut, the calcination temperature is 550℃ and the holding time is 3h.

[0060] (5) The protective agent carrier obtained in step (4) is impregnated with a diluted impregnation solution using the equal volume method, cured for 12 hours, dried at 120°C for 4 hours to control the water content to be less than 3%, and calcined at 450°C for 4 hours to obtain the finished residue oil hydroprotective agent. The water absorption rate of the carrier is 85%. The diluted impregnation solution is a self-made Mo-Ni-P system, and the contents of molybdenum trioxide, nickel oxide and elemental P in the impregnation solution are 24%, 4.8% and 2.1% respectively by mass. It is diluted with water to the contents of molybdenum trioxide, nickel oxide and elemental P in the impregnation solution are 8%, 1.6% and 0.7% respectively by mass.

[0061] Example 2

[0062] Example 2 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0063] The coal gangue is calcined coal gangue after being calcined at 500℃. The carrier includes the following raw materials: dry adhesive powder, kaolin, and coal gangue in parts by weight of 30, 40, and 33, respectively. The adhesive, binder, plasticizer, lubricant, and water in parts by weight of 4, 3, 2, 2, and 50, respectively.

[0064] The impregnation solution and carrier molding and impregnation operation are the same as in Example 1.

[0065] Example 3

[0066] Example 3 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0067] The carrier comprises the following raw materials: mixed powder, adhesive, binder, plasticizer, lubricant, and water in weight parts of 100 parts, 4 parts, 3 parts, 2 parts, 2 parts, and 50 parts, respectively. The mixed powder is prepared as follows: dry adhesive powder, kaolin, and coal gangue are weighed in weight parts of 30 parts, 40 parts, and 40 parts, respectively. The powder, ball mill, and water are weighed in a weight ratio of 1:2:1 and then ball-milled in a drum ball mill with a 1.5% water-reducing agent by mass for 18 hours. After pressure filtration, drying, and ultrafine grinding, a mixed powder with a particle size ≤325 mesh is obtained. The water-reducing agent is a water glass solution with a modulus of 2.5 and a mass fraction of 20%.

[0068] The impregnation solution and carrier molding and impregnation operations are the same as in Example 1.

[0069] Example 4

[0070] Example 4 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0071] The impregnation solution is added to the kneading solution and mixed evenly. After the molded body is dried, cut into strips, and calcined, the protective agent is obtained directly.

[0072] The preparation method of the residue hydrotreating protectant described in this embodiment includes the following steps:

[0073] (1) Weigh the dry adhesive powder, kaolin, coal gangue, and adhesive according to the weight proportions of Example 1, and mix the powder in a kneader for 30 minutes to make the powder evenly mixed;

[0074] (2) Weigh out 4 parts of adhesive solvent, 3 parts of plasticizer, 2 parts of lubricant, 39.5 parts of water, and 17.5 parts of impregnation liquid according to the weight ratio. Stir manually for 3 minutes to make the liquid evenly mixed. Then, add it evenly to the powder in step (1) and knead for 40 minutes to obtain a clay with good plasticity. The impregnation liquid contains molybdenum trioxide, nickel oxide, and elemental P with contents of 24%, 4.8%, and 2.1%, respectively. Density at 25℃: 1.5 g / cm³ 3 .

[0075] (3) After vacuum refining the mud obtained in step (2), it is aged for 24 hours and then extruded into a blank using a clover mold with a diameter of 3 mm; the vacuum degree of the vacuum refining is above 0.9 atm.

[0076] (4) The blank obtained in step (3) is dried, cut into strips and calcined in sequence to obtain a protective agent carrier; the drying temperature is 120℃ and the final moisture content is 15%; the strip length is controlled to be 2-8mm ≥ 85% when the strip is cut, the calcination temperature is 450℃ and the holding time is 3h.

[0077] Example 5

[0078] Example 5 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0079] Citric acid was introduced into the impregnation solution at a weight fraction of 1.5%.

[0080] Example 6

[0081] Example 6 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0082] The impregnation solution contains 1.5% citric acid and 1% PEG-2000 by weight.

[0083] Example 7

[0084] Example 7 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0085] The impregnation solution is made of molybdenum trioxide, basic nickel carbonate with a nickel content of 42%, and industrial phosphoric acid with a mass fraction of 85%.

[0086] Example 8

[0087] Example 8 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0088] The impregnation solution is made of molybdenum trioxide, basic nickel carbonate with a nickel content of 42%, and industrial phosphoric acid with a mass fraction of 75%.

[0089] Example 9

[0090] Example 9 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0091] The impregnation solution is made of molybdenum trioxide, basic nickel carbonate with a nickel content of 40%, and industrial phosphoric acid with a mass fraction of 75%.

[0092] Example 10

[0093] Example 10 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0094] The impregnation solution is made of molybdenum trioxide, nickel nitrate hexahydrate with a nickel content of 20%, and industrial phosphoric acid with a mass fraction of 85%.

[0095] Example 11

[0096] Example 11 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0097] The impregnation solution is made of molybdenum trioxide, nickel nitrate hexahydrate with a nickel content of 20%, and industrial phosphoric acid with a mass fraction of 75%.

[0098] Example 12

[0099] Example 12 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0100] The impregnation solution is made of molybdenum trioxide, nickel nitrate nonahydrate with a nickel content of 17%, and industrial phosphoric acid with a mass fraction of 85%.

[0101] Example 13

[0102] Example 13 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this example and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0103] The impregnation solution is made of molybdenum trioxide, nickel nitrate nonahydrate with a nickel content of 17%, and industrial phosphoric acid with a mass fraction of 75%.

[0104] In order to compare with the above embodiments of the present invention, the following comparative examples are also proposed in the embodiments of the present invention.

[0105] Compare with Example 1

[0106] Comparative Example 1 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this embodiment and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0107] In step (4), the roasting temperature is 500℃.

[0108] Compare with Example 2

[0109] Comparative Example 2 of this invention also proposes a method for preparing a residual oil hydrotreating protectant obtained from coal gangue. The difference between the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in this embodiment and the preparation method of the residual oil hydrotreating protectant obtained from coal gangue in Example 1 is as follows:

[0110] In step (4), the roasting temperature is 550℃.

[0111] Please refer to Table 1 below, which shows the performance parameters of the residue hydrotreating protectant obtained by the parameters corresponding to Examples 1 to 13 and Comparative Examples 1 to 2 of the present invention.

[0112] Table 1

[0113]

[0114] As can be clearly seen from Table 1, this invention uses coal gangue, kaolin, and dry adhesive powder as main raw materials, with one or more of citric acid, acetic acid, and hydrochloric acid as solvents, one or more of HPMC, CMC, gelatin, and amylopectin as binders, one or more of glycerin, tung oil, and guar gum as lubricants, and one or more of PEG and PVA as plasticizers. The residual oil hydrotreating agent is prepared using extrusion molding equipment, and its shapes include, but are not limited to, honeycomb, clover, four-leaf clover, butterfly, cylindrical, and Raschig ring five-toothed ball shapes. After molding and calcination, it is impregnated with a solution of soluble salts of active metals such as Mo / Ni, dried, and then calcined to activate it into a residual oil hydrotreating agent. This achieves the reuse of coal gangue, and the prepared hydrotreating agent has excellent performance indicators.

[0115] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for preparing a residual oil hydrogenation guard prepared from coal gangue, characterized in that, The application relates to a method for preparing a residual oil hydrogenation protective agent, which comprises the following components in parts by weight of raw materials: Coal gangue 1-40%, kaolin 5-40%, alumina powder dry glue powder 20-40%, auxiliary material 0.1-5%; The alumina powder dry glue powder is a mixture of pseudo-boehmite and macroporous dry glue powder; The auxiliary material is a peptizing agent, a binder, a lubricant and a plasticizer; The method comprises the following steps: The powder raw material and the liquid raw material are mixed in a set ratio respectively to obtain mixed powder and mixed liquid respectively; The mixed liquid is added into the mixed powder for stirring and mixing to obtain a mud; The mud is vacuum kneaded to obtain a vacuum-kneaded mud section, and the mud section is aged to obtain an aged mud section; The aged mud section is extruded to obtain a protective agent blank body, and the moisture content is dried to below 3% to obtain a dried blank body; The dried blank body is calcined to obtain a protective agent carrier, the protective agent carrier is impregnated with an active metal soluble salt solution, and after drying, the protective agent carrier is calcined and activated to obtain a residual oil hydrogenation protective agent.

2. The method for preparing the residual oil hydrogenation guard prepared from coal gangue according to claim 1, characterized in that, The kaolin is calcined kaolin.

3. The method of claim 1, wherein the coal gangue is used to produce the residual oil hydrogenation guard agent. The peptizing agent is one or more combinations of citric acid, acetic acid and hydrochloric acid.

4. The method for preparing the residual oil hydrogenation guard agent using coal gangue according to claim 1, characterized in that, The lubricant is one or more combinations of glycerol, tung oil and sesbania gum, and the amount of the lubricant is 1%-5%.

5. The method for preparing the residual oil hydrogenation guard agent using coal gangue according to claim 1, characterized in that, The plasticizer is one or more combinations of PEG and PVA.

6. The method of claim 1, wherein the method is characterized by, The binder is one or more combinations of HPMC, CMC, gelatin and amylopectin, and the amount of the binder is 1%-5%.

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