Device for separating platinum and rhenium from waste platinum catalyst

Abstract

The utility model discloses a device for separating platinum and rhenium from a waste platinum catalyst, which comprises a platinum and rhenium leaching solution recycling box, a platinum and rhenium leaching solution recycling box and a platinum and rhenium leaching solution recycling box, the reducing agent container is used for storing a reducing agent solution, and an outlet of the reducing agent container is connected with an inlet of the platinum-rhenium leachate recycling box; an inlet of the microwave reaction kettle is connected with an outlet of the platinum-rhenium leachate recycling box, and the microwave reaction kettle is used for heating the pretreated leachate to a specified temperature so as to selectively reduce platinum in the pretreated leachate; an inlet of the sand core suction filtration cup is connected with an outlet of the microwave reaction kettle; the sand core filter head is arranged at a bottom outlet of the sand core suction filtration cup and is used for filtering platinum in the tail liquid; and the tail liquid recycling box is arranged at the lower part of the sand core filter head and is used for recycling the filtered rhenium-containing tail liquid. According to the utility model, based on the platinum-rhenium reduction potential difference, the selective reduction of platinum from the platinum-rhenium leachate is realized by using a microwave-assisted ethylene glycol reduction method, and the recovery and separation of high-purity platinum are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of precious metal element recovery. Specifically, it particularly relates to a device for separating platinum and rhenium from waste platinum catalysts. Background Art

[0002] Pt-Re / Al 2 O 3 Reforming catalysts are widely used in the petroleum and chemical industries. Among them, platinum, as a precious metal, is scarce in resources and has a high added value. The annual scrapped amount of reforming catalysts used in the petrochemical industry is huge, which contains rich secondary platinum resources and has important recycling significance. In traditional hydrometallurgical recycling processes, ion exchange resins or solvent extraction are usually used to separate platinum and rhenium. However, there is inevitably a small amount of rhenium in the recovered platinum. Therefore, ion exchange or extraction separation cannot achieve complete separation of platinum and rhenium. The existence of rhenium limits the value-added utilization of secondary platinum resources. Therefore, developing a new process for the deep separation of platinum and rhenium and improving the purity of secondary platinum resources are extremely important for enhancing the value-added utilization of secondary platinum resources.

[0003] Currently, the existing methods for separating platinum and rhenium have certain limitations. Ion exchange and extraction separation involve the use of organic reagents, and it is difficult to deeply separate platinum and rhenium. At the same time, they have disadvantages such as high pollution, high energy consumption, high cost, and low separation purity.

[0004] Therefore, there is an urgent need to develop a device for separating platinum and rhenium from waste platinum catalysts. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a device for separating platinum and rhenium from waste platinum catalysts, aiming to selectively reduce platinum from the platinum-rhenium leaching solution and achieve the recovery and separation of high-purity platinum.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A device for separating platinum and rhenium from waste platinum catalysts, comprising: a platinum-rhenium leaching solution recovery tank for storing the recovered platinum-rhenium leaching solution; a reducing agent container for storing a reducing agent solution, and an outlet of the reducing agent container is connected to an inlet of the platinum-rhenium leaching solution recovery tank through a reducing agent feed pipeline; a microwave reactor, an inlet of the microwave reactor is connected to an outlet of the platinum-rhenium leaching solution recovery tank through a pretreatment leaching solution feed pipeline and a pretreatment leaching solution feed pump, and the microwave reactor is used to heat the pretreatment leaching solution to a specified temperature to selectively reduce platinum in the pretreatment leaching solution; a sand core suction filter cup, an inlet of the sand core suction filter cup is connected to an outlet of the microwave reactor through a tail liquid delivery pipeline and a tail liquid delivery pump; a sand core filter head provided at a bottom outlet of the sand core suction filter cup for filtering out platinum in the tail liquid; a tail liquid recovery tank provided below the sand core filter head for recovering the filtered rhenium-containing tail liquid.

[0008] Preferably: An outer shell is provided outside the microwave reactor, a base is provided at the bottom of the outer shell, and a power switch for starting and stopping the microwave reactor is provided on the outer shell.

[0009] Preferably: It further includes a platinum recovery tank for collecting the platinum filtered by the sand core suction filter cup.

[0010] Preferably: The reducing agent solution is a sodium hydroxide-ethylene glycol solution.

[0011] Due to the above technical solutions adopted by the present utility model, it has the following advantages:

[0012] The device for separating platinum and rhenium from waste platinum catalysts provided by the present utility model can effectively solve problems such as complex platinum-rhenium separation process and high rhenium residue. Based on the difference in reduction potentials of platinum and rhenium, the device uses a microwave-assisted ethylene glycol reduction method to selectively reduce platinum from the platinum-rhenium leaching solution, realizing the recovery and separation of high-purity platinum. At the same time, the microwave method has a short reaction time and is environmentally friendly, and the separated high-purity platinum can meet the requirements of high-purity platinum resources such as the preparation of regenerated catalysts. Description of the Drawings

[0013] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0014] Figure 1 It is a schematic structural diagram of a device for separating platinum and rhenium from waste platinum catalysts provided by an embodiment of the present utility model.

[0015] The reference numerals in the drawings are as follows:

[0016] 1. Sodium hydroxide - ethylene glycol container; 2. Sodium hydroxide - ethylene glycol feed pipeline; 3. Platinum - rhenium leaching solution recovery tank; 4. Pretreatment leaching solution feed pipeline; 5. Pretreatment leaching solution feed pump; 6. Microwave separation equipment housing; 7. Microwave reaction cell; 8. Base; 9. Microwave power switch; 10. Tail liquid delivery pipeline; 11. Tail liquid delivery pump; 12. Sand - core suction filtration cup; 13. Sand - core filter head; 14. Tail liquid recovery tank; 15. High - purity platinum recovery tank. Detailed implementation manners

[0017] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model fall within the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0020] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0022] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0023] The device for separating platinum and rhenium from waste platinum catalysts provided by the present utility model includes: a platinum-rhenium leaching solution recovery tank for storing the recovered platinum-rhenium leaching solution; a reducing agent container for storing a reducing agent solution, and the outlet of the reducing agent container is connected to the inlet of the platinum-rhenium leaching solution recovery tank; a microwave reactor, the inlet of the microwave reactor is connected to the outlet of the platinum-rhenium leaching solution recovery tank, and the microwave reactor is used to heat the pretreated leaching solution to a specified temperature to selectively reduce platinum in the pretreated leaching solution; a sintered filter cup, the inlet of the sintered filter cup is connected to the outlet of the microwave reactor; a sintered filter head provided at the bottom outlet of the sintered filter cup for filtering out platinum in the tail liquid; a tail liquid recovery tank provided below the sintered filter head for recovering the rhenium-containing tail liquid after filtration. The present utility model is based on the difference in the reduction potentials of platinum and rhenium, and uses the microwave-assisted ethylene glycol reduction method to selectively reduce platinum from the platinum-rhenium leaching solution and realize the recovery and separation of high-purity platinum.

[0024] Next, the device for separating platinum and rhenium from waste platinum catalysts provided by the embodiments of the present utility model will be described in detail with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] Please refer to Figure 1, a device for separating platinum and rhenium from waste platinum catalysts provided by the present utility model includes: a platinum-rhenium leaching solution recovery tank 3 for storing the recovered platinum-rhenium leaching solution; a reducing agent container 1 for storing a reducing agent solution, and the outlet of the reducing agent container 1 is connected to the inlet of the platinum-rhenium leaching solution recovery tank 3 through a reducing agent feed pipeline; a microwave reactor 7, the inlet of the microwave reactor 7 is connected to the outlet of the platinum-rhenium leaching solution recovery tank 3 through a pre-treated leaching solution feed pipeline 4 and a pre-treated leaching solution feed pump 5, and the microwave reactor 7 is used to heat the pre-treated leaching solution to a specified temperature to selectively reduce platinum in the pre-treated leaching solution; a sintered filter cup 12, the inlet of the sintered filter cup 12 is connected to the outlet of the microwave reactor 7 through a tail liquid transfer pipeline 10 and a tail liquid transfer pump 11; a sintered filter head 13 provided at the bottom outlet of the sintered filter cup 12 for filtering out platinum in the tail liquid; a tail liquid recovery tank 14 provided below the sintered filter head 13 for recovering the rhenium-containing tail liquid after filtration.

[0027] In the above embodiment, preferably, an outer shell 6 is provided outside the microwave reactor 7, a base 8 is provided at the bottom of the outer shell 6, and a power switch 9 for starting and stopping the microwave reactor 7 is provided on the outer shell 6.

[0028] In the above embodiment, preferably, a platinum recovery tank 15 is further included for collecting the platinum filtered by the sintered filter cup 12.

[0029] In the above embodiment, preferably, the reducing agent solution is a sodium hydroxide-ethylene glycol solution.

[0030] Embodiment 2

[0031] When the device for separating platinum and rhenium from waste platinum catalysts provided by the present utility model is in use, the recovered platinum-rhenium leaching solution is stored in the platinum-rhenium leaching solution recovery tank 3, the sodium hydroxide-ethylene glycol solution is stored in the reducing agent container 1, the sodium hydroxide-ethylene glycol solution is added to the platinum-rhenium leaching solution recovery tank 3 through the reducing agent feed pipeline 2 to adjust the pH of the platinum-rhenium leaching solution to 11-12. After mixing, the pre-treated leaching solution is transferred to the microwave reactor 7 through the pre-treated leaching solution feed pipeline 4, the pre-treated leaching solution is heated to 160-200 °C, and after the reaction is completed and cooled naturally, the slurry is transferred to the sintered filter cup 12 through the tail liquid transfer pipeline 11. The slurry is filtered through the sintered filter head 13, the rhenium-containing solution is stored in the tail liquid recovery tank 14, and the separated high-purity platinum is stored in the platinum recovery tank 15.

[0032] In summary, the device can effectively solve the problem of efficient separation of platinum-rhenium leaching solution. By utilizing the significant difference in reduction potential between platinum and rhenium and the microwave-assisted ethylene glycol reduction process, the effect of selectively reducing platinum in an alkaline environment is achieved. Through the optimized combination of processes, a high-efficiency separation process for platinum-rhenium leaching solution is developed, realizing the conversion of waste platinum catalysts into high-purity platinum, broadening the scenarios for the value-added utilization of waste platinum catalysts, meeting the requirements for high-purity platinum resources as fuel cell catalysts, and having significant environmental and economic benefits.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for separating platinum-rhenium from waste platinum catalyst, characterized in that: include: A platinum-rhenium leaching solution recovery box, used for storing recovered platinum-rhenium leaching solution; A reducing agent container, used for storing a reducing agent solution, wherein an outlet of the reducing agent container is connected to an inlet of the platinum-rhenium leaching solution recovery tank through a reducing agent feed pipeline; A microwave reactor, the inlet of which is connected to the outlet of the platinum-rhenium leachate recovery tank via a pretreatment leachate feed pipeline and a pretreatment leachate feed pump, and the microwave reactor is used to heat the pretreatment leachate to a specified temperature to selectively reduce platinum in the pretreatment leachate; A sand core filter cup, the inlet of which is connected to the outlet of the microwave reactor through a tail liquid delivery pipeline and a tail liquid delivery pump; A sand core filter head is arranged at the bottom outlet of the sand core filter cup and is used to filter out platinum in the tail liquid; The tail liquid recovery box is arranged at the lower part of the sand core filter head and is used for recovering the rhenium-containing tail liquid after filtration.

2. The device according to claim 1, characterized in that The microwave reactor is provided with a shell on the outside, a base is provided at the bottom of the shell, and a power switch for starting and stopping the microwave reactor is provided on the shell.

3. The device according to claim 1, characterized in that It also includes a platinum recovery box for collecting the platinum filtered by the sand core filter cup.

4. The device according to claim 1, characterized in that The reducing agent solution is a sodium hydroxide-ethylene glycol solution.

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