An apparatus for producing an aromatic rubber plasticizer

Abstract

The utility model discloses a kind of aromatic group rubber plasticizer production devices, comprising: hydrogenation treatment reactor, hydrogenation condensation reactor, supplementary finishing reactor, high-pressure separator, low-pressure separator, atmospheric column, vacuum column and mixer;Wherein, the hydrogenation treatment reactor, hydrogenation condensation reactor, supplementary finishing reactor, high-pressure separator, low-pressure separator, atmospheric column, vacuum column and mixer are sequentially connected in order.The naphthenic base distillate high-pressure hydrogenation device provided in the utility model, under the condition that the safe and stable operation of device is guaranteed, rubber plasticizer A1004, A0907 meeting national standards are produced.

Description

Technical Field

[0001] This utility model relates to the field of aromatic rubber plasticizer production technology, and more specifically to an aromatic rubber plasticizer production apparatus. Background Technology

[0002] The 200,000-ton / year naphthenic distillate hydrotreating unit in the hydrotreating workshop adopts a hydrotreating-hydrodewaxing-refining process technology. Its main products are transformer oil, refrigeration oil, and heavy lubricating oil base oil. The main process flow is as follows: feedstock oil is mixed with hydrogen and enters the hydrotreating reactor and the hydrodewaxing reactor. Under high temperature, high pressure, and catalytic action, hydrodesulfurization, denitrification, deoxygenation, and demetallization reactions occur. The product then enters the hydrodewaxing reactor where a dewaxing catalyst selectively removes high-pour-point large molecular weight n-alkanes. The resulting oil then enters the refining reactor for aromatic saturation reaction. The resulting oil exiting the refining reactor enters a high-low pressure separator for oil-gas separation; the obtained oil phase is the low-grade oil. High-pressure circulating hydrogen is compressed by the circulating hydrogen compressor and mixed with the feedstock. The low-grade oil enters the fractionation system for atmospheric and vacuum fractionation. The separated side-stream oil is cooled by air cooling before exiting the unit. (“Layout Design of a 200,000-ton / year Naphthenic Distillate Hydrogenation Unit”, August 2009; “Research on High-Pressure Hydrogenation of Naphthenic Distillate to Produce Specialty Oils”, December 2021).

[0003] Due to the early construction of the plant, the market environment has changed, and the original products of the 200,000-ton plant can no longer meet market demand. Market research indicates a broad market for aromatic rubber plasticizers. If the products of the 200,000-ton plant could be converted to produce rubber plasticizers, it could fill the gap in the supply of such oils in the northern region to some extent. Aromatic rubber plasticizers are compounds containing aromatic structures (such as benzene rings, naphthalene rings, etc.), mainly used to improve the processing performance, flexibility, and filling properties of rubber. In the rubber industry, they reduce intermolecular forces, making rubber molecular chains easier to move, thereby improving processing efficiency and product performance. According to the national standard GB / T 33322-2016 "Rubber Plasticizers Aromatic Mineral Oils", the indicators of two rubber plasticizers, A1004 and A0709, are similar to the reduced-level (reduced by two, three, and reduced-level) indicators of the 200,000-ton plant's products. Therefore, this utility model provides an aromatic rubber plasticizer production device capable of producing qualified A1004 and A0709 rubber plasticizers. Utility Model Content

[0004] This utility model aims to at least partially solve one of the aforementioned technical problems in the prior art.

[0005] Therefore, one objective of this utility model is to provide an apparatus for producing aromatic rubber plasticizers, comprising: a hydrogenation treatment reactor, a hydrogen dewaxing reactor, a supplementary refining reactor, a high-pressure separator, a low-pressure separator, an atmospheric pressure tower, a vacuum tower, and a mixer;

[0006] The hydrogenation reactor, the hydrogen dewaxing reactor, the supplementary refining reactor, the high-pressure separator, the low-pressure separator, the atmospheric pressure tower, the vacuum tower, and the mixer are connected in sequence.

[0007] Furthermore, the aforementioned device also includes: a circulating hydrogen compressor;

[0008] One end of the circulating hydrogen compressor is connected to the high-pressure separator, and the other end is connected to the hydrogenation reactor.

[0009] As can be seen from the above technical solution, compared with the prior art, this utility model provides a high-pressure hydrogenation device for cycloalkyl distillate oil, which produces rubber plasticizers A1004 and A0907 that meet national standards while ensuring the safe and stable operation of the device. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0011] Figure 1 This is a structural schematic diagram of the present invention.

[0012] Among them, 1-hydrogenation treatment reactor, 2-hydrogen dewaxing reactor, 3-supplementary refining reactor, 4-high pressure separator, 5-mortise separator, 6-atmospheric pressure tower, 7-low pressure tower, 8-mixer, and 9-circulating hydrogen compressor. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] Example 1

[0019] This embodiment provides an apparatus for producing aromatic rubber plasticizers, including: a hydrogenation treatment reactor 1, a hydrogen dewaxing reactor 2, a supplementary refining reactor 3, a high-pressure separator 4, a low-pressure separator 5, an atmospheric pressure tower 6, a vacuum tower 7, a mixer 8, and a circulating hydrogen compressor 9.

[0020] The hydrogenation reactor 1, the hydrogen decondensation reactor 2, the supplementary refining reactor 3, the high-pressure separator 4, the low-pressure separator 5, the atmospheric pressure tower 6, the vacuum tower 7, and the mixer 8 are connected in sequence.

[0021] One end of the circulating hydrogen compressor 9 is connected to the high-pressure separator 4, and the other end is connected to the hydrogenation treatment reactor 1.

[0022] Example 2

[0023] This embodiment provides a method for using the device in Embodiment 1, as detailed below:

[0024] Before entering the hydrotreating reactor 1, the feedstock oil is mixed with fresh hydrogen (recycled hydrogen). The fresh hydrogen used is hydrogen gas with a purity of over 99.99% from a self-made hydrogen unit. After the temperature of the mixed hydrogen oil is raised to 310-325℃, it enters the hydrotreating reactor 1 through the process pipeline. The outlet temperature of the hydrotreating reactor 1 is controlled at 350-380℃, and the weighted temperature of the hydrotreating reactor 1 is controlled at 335-350℃. The catalysts in the hydrotreating reactor 1 are FF-36 and FC-28. Under the catalysis of the catalysts inside the hydrotreating reactor 1, the feedstock oil mainly undergoes hydrogenation substitution reaction with hydrogen gas, and partially undergoes aromatic saturation and olefin saturation reactions. The products enter the hydrodewaxing reactor 2.

[0025] The weighted temperature of the hydrodewaxing reactor 2 is controlled at 330-350℃, and the catalyst is FDW-3. The generated oil selectively removes high-melting-point large molecular n-alkanes under the action of the catalyst inside the hydrodewaxing reactor 2, and the product enters the supplementary refining reactor 3.

[0026] The weighted temperature of the supplementary refining reactor 3 is controlled at 235–250℃. The catalyst in the supplementary refining reactor is FV-10. The generated oil and hydrogen undergo saturation of aromatic compounds primarily under the action of the catalyst inside the supplementary refining reactor 3. Process adjustments in the reaction section mainly involve adjusting the temperature and pressure of the reaction system to reduce the aromatic saturation reaction inside the reactor while ensuring a low oil pour point. The system pressure is controlled at 13.7–14.5 MPa. The throughput is controlled at 20 t / h–33.75 t / h. Here, the system pressure refers to the pressure at the top of the high-pressure separator 4, and the throughput refers to the throughput of the entire reaction system, which can also be understood as the throughput of each reactor.

[0027] The reaction-generated oil enters the high-low pressure separator 4 to separate the gas and liquid. The gas then enters the circulating hydrogen compressor 9 to form circulating hydrogen, which is reused in the hydrogenation reactor 1. The resulting oil enters the low-pressure separator to obtain low-grade oil, which enters the fractionation system. The fractionation system is divided into an atmospheric pressure tower 6 and a vacuum tower 7. The target product A1004, which is the second and third vacuum lines, is mixed by the mixer 8 and then sent to the tank area for storage. The target product A0709, which is the bottom vacuum line oil, is sent to the tank area for storage via pipeline.

[0028] Products A1004 and A0709 were tested according to GB / T 33322-2016 "Rubber Plasticizers - Aromatic Mineral Oils", and the results are shown in the table below:

[0029]

[0030]

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0032] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An apparatus for producing aromatic rubber plasticizers, characterized in that, include: Hydrotreating reactor, hydrodewaxing reactor, supplementary refining reactor, high-pressure separator, low-pressure separator, atmospheric pressure tower, vacuum tower and mixer; The hydrogenation reactor, the hydrogen dewaxing reactor, the supplementary refining reactor, the high-pressure separator, the low-pressure separator, the atmospheric pressure tower, the vacuum tower, and the mixer are connected in sequence.

2. The apparatus for producing aromatic rubber plasticizer according to claim 1, characterized in that, Also includes: Recycled hydrogen compressor; One end of the circulating hydrogen compressor is connected to the high-pressure separator, and the other end is connected to the hydrogenation reactor.

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