A recovery system for cumene and alpha-methylstyrene

Abstract

The utility model belongs to the technical field of chemical material recycling, and relates to a recycling system of cumene and alpha-methylstyrene, comprising: a cumene recycling assembly, a cumene condensing assembly, a cumene conveying assembly, an alpha-methylstyrene recycling assembly, an alpha-methylstyrene condensing assembly, an alpha-methylstyrene conveying assembly and an alpha-methylstyrene storage assembly. The application provides a recycling system of cumene and alpha-methylstyrene which is simple in process, stable in operation, low in operation cost and efficient and economical.

Description

Technical Field

[0001] This utility model relates to the field of chemical material recycling technology, and in particular to a recycling system for cumene and α-methylstyrene. Background Technology

[0002] α-Methylstyrene can be used in the production of coatings and plasticizers, and also as a solvent in organic synthesis. In a phenol production unit using cumene as a raw material, the side stream of the AMS top column contains cumene raw material and the byproduct α-methylstyrene (AMS). The α-methylstyrene can be purified by distillation and then hydrogenated to produce cumene, which is then returned to the phenol unit. Alternatively, it can be sold as a byproduct. Meanwhile, the purified and recovered cumene can be used as cumene feed to the oxidation unit in the phenol-ketone unit.

[0003] Patent CN112142545A discloses a method for separating cumene and α-methylstyrene. Using a mixture of cumene and AMS as raw materials, a perbromoethoxylated columnar aromatic hydrocarbon crystal is prepared for adsorption and separation of the mixture. The selective adsorption of cumene achieves the separation of cumene and AMS. However, this technique does not provide a definite purity for the separated cumene and AMS. This separation technology is simple to operate, requires no complex equipment, has good operational safety, is recyclable, and saves energy. However, the adsorption process has high requirements for operational procedures and impurity content. For the AMS mixture system, the material composition is complex, and the purity achieved for downstream applications may not be guaranteed.

[0004] Patent CN113979830A discloses a method for refining α-methylstyrene. Using a mixture of cumene and AMS as raw material, the mixture enters the middle section of a light component removal column. Cumene and light components such as water are collected from the top of the column, while the high-concentration AMS from the bottom enters the upper part of the refining column. The refining column separates cumene and AMS; cumene is collected from the top, AMS from the bottom, and the middle-boiling component is discharged from the middle, thus achieving separation of cumene and AMS. This technology employs conventional distillation processes, uses vacuum operation, increases equipment investment, has a relatively low top operating temperature, and produces no low-pressure steam as a byproduct, but has low energy utilization. Utility Model Content

[0005] In view of this, the present invention provides a recycling system for cumene and α-methylstyrene.

[0006] Specifically, this utility model is achieved through the following technical solution:

[0007] According to a first aspect of the present invention, a recycling system for cumene and α-methylstyrene is provided, comprising:

[0008] Cumene recovery unit, used to receive raw materials and recover cumene;

[0009] A cumene condensation assembly is used to condense the substance output from the cumene recovery assembly to obtain cumene; the cumene condensation assembly is connected to the cumene recovery assembly.

[0010] A cumene conveying assembly is used to convey the substance output from the cumene recovery assembly; the cumene conveying assembly is connected to the cumene recovery assembly.

[0011] An α-methylstyrene recovery assembly is used to receive the substance conveyed by the cumene conveying assembly and recover α-methylstyrene; the α-methylstyrene recovery assembly is connected to the cumene conveying assembly;

[0012] An α-methylstyrene condensation assembly is used to condense the substance output from the α-methylstyrene recovery assembly to obtain α-methylstyrene; the α-methylstyrene condensation assembly is connected to the α-methylstyrene recovery assembly;

[0013] An α-methylstyrene conveying assembly is used to convey the substance output from the α-methylstyrene recovery assembly; the α-methylstyrene conveying assembly is connected to the α-methylstyrene recovery assembly;

[0014] An α-methylstyrene storage component is used to store α-methylstyrene output from the α-methylstyrene condensation component; the α-methylstyrene storage component is connected to the α-methylstyrene condensation component.

[0015] Optionally, the cumene recovery assembly includes: a cumene recovery tower, the top of which is connected to the cumene condensation assembly, and the bottom of which is connected to the cumene conveying assembly.

[0016] Optionally, the cumene recovery assembly further includes an isopropylbenzene reboiler, the two ends of which are respectively connected to the bottom of the cumene recovery tower.

[0017] Optionally, the cumene condensation assembly includes: a cumene condenser, a cumene reflux tank, a cumene recovery tower top delivery pump, and a cumene cooler, wherein the cumene condenser and the cumene recovery tower top delivery pump are respectively connected to the top of the cumene recovery tower, the cumene reflux tank is respectively connected to the cumene condenser and the cumene recovery tower top delivery pump, and the cumene cooler is connected to the top of the cumene recovery tower.

[0018] Optionally, the cumene conveying assembly includes: a bottom conveying pump of the cumene recovery tower, which is connected to the bottom of the cumene recovery tower and the α-methylstyrene recovery assembly.

[0019] Optionally, the α-methylstyrene recovery assembly includes: an α-methylstyrene recovery tower, the top of which is connected to the α-methylstyrene condensation assembly, the bottom of which is connected to the α-methylstyrene conveying assembly, and the middle of which is connected to the cumene conveying assembly.

[0020] Optionally, the α-methylstyrene recovery assembly further includes an α-methylstyrene reboiler, the two ends of which are respectively connected to the bottom of the α-methylstyrene recovery tower.

[0021] Optionally, the α-methylstyrene condensation assembly includes: an α-methylstyrene condenser, an α-methylstyrene reflux tank, an α-methylstyrene recovery tower top transfer pump, and an α-methylstyrene cooler, wherein the α-methylstyrene condenser and the α-methylstyrene recovery tower top transfer pump are respectively connected to the top of the α-methylstyrene recovery tower, the α-methylstyrene reflux tank is respectively connected to the α-methylstyrene condenser and the α-methylstyrene recovery tower top transfer pump, and the α-methylstyrene cooler is respectively connected to the top of the α-methylstyrene recovery tower and the α-methylstyrene storage assembly.

[0022] Optionally, the α-methylstyrene conveying assembly includes: an α-methylstyrene recovery tower bottom conveying pump, which is connected to the bottom of the α-methylstyrene recovery tower.

[0023] Optionally, the α-methylstyrene storage assembly includes: an α-methylstyrene storage tank and an α-methylstyrene delivery pump, wherein the α-methylstyrene storage tank is connected to both ends of the α-methylstyrene cooler and the α-methylstyrene delivery pump, respectively.

[0024] The technical solution provided by this utility model brings at least the following beneficial effects:

[0025] This application provides a simple, stable, low-cost, efficient, and economical recovery system for cumene and α-methylstyrene. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0027] 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 related technologies will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a cumene and α-methylstyrene recovery system provided for an embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Figure 1 The illustration schematically depicts a cumene and α-methylstyrene recovery system applicable to embodiments of the present invention.

[0031] Reference Figure 1 As shown, this application provides a recycling system for cumene and α-methylstyrene, comprising:

[0032] Cumene recovery unit, used to receive raw materials and recover cumene;

[0033] A cumene condensation assembly is used to condense the substance output from the cumene recovery assembly to obtain cumene; the cumene condensation assembly is connected to the cumene recovery assembly.

[0034] A cumene conveying assembly is used to convey the substance output from the cumene recovery assembly; the cumene conveying assembly is connected to the cumene recovery assembly.

[0035] An α-methylstyrene recovery assembly is used to receive the substance conveyed by the cumene conveying assembly and recover α-methylstyrene; the α-methylstyrene recovery assembly is connected to the cumene conveying assembly;

[0036] An α-methylstyrene condensation assembly is used to condense the substance output from the α-methylstyrene recovery assembly to obtain α-methylstyrene; the α-methylstyrene condensation assembly is connected to the α-methylstyrene recovery assembly;

[0037] An α-methylstyrene conveying assembly is used to convey the substance output from the α-methylstyrene recovery assembly; the α-methylstyrene conveying assembly is connected to the α-methylstyrene recovery assembly;

[0038] An α-methylstyrene storage component is used to store α-methylstyrene output from the α-methylstyrene condensation component; the α-methylstyrene storage component is connected to the α-methylstyrene condensation component.

[0039] In this embodiment, the distillation feedstock is fed to the cumene recovery unit for recovery, the cumene condensation unit condenses the cumene recovered by the cumene recovery unit, the material in the cumene recovery unit is fed to the α-methylstyrene recovery unit via the cumene conveying unit for α-methylstyrene recovery, the α-methylstyrene condensation unit condenses the α-methylstyrene recovered by the α-methylstyrene recovery unit, and the α-methylstyrene is fed to the α-methylstyrene storage unit via the α-methylstyrene conveying unit for storage.

[0040] For example, the cumene recovery assembly includes: a cumene recovery tower 1, the top of which is connected to the cumene condensation assembly, and the bottom of which is connected to the cumene conveying assembly.

[0041] In this embodiment, the cumene recovery tower 1 is used to receive raw materials for cumene recovery.

[0042] For example, the cumene recovery assembly further includes an isopropylbenzene reboiler 2, the two ends of which are respectively connected to the bottom of the cumene recovery tower 1.

[0043] In this embodiment of the application, the raw materials that have not fully reacted in the cumene recovery tower 1 are heated by the cumene reboiler 2 and then re-enter the cumene recovery tower 1 for recovery.

[0044] For example, the cumene condensation assembly includes: a cumene condenser 3, a cumene reflux tank 4, a cumene recovery tower top delivery pump 5, and a cumene cooler 6, wherein the cumene condenser 3 and the cumene recovery tower top delivery pump 5 are respectively connected to the top of the cumene recovery tower 1, the cumene reflux tank 4 is respectively connected to the cumene condenser 3 and the cumene recovery tower top delivery pump 5, and the cumene cooler 6 is connected to the top of the cumene recovery tower 1.

[0045] In this embodiment of the application, the cumene recovered by the cumene recovery tower 1 is successively condensed by the cumene condenser 3, refluxed by the cumene reflux tank 4, conveyed by the cumene recovery tower top conveying pump 5, and cooled by the cumene cooler 6 before being output.

[0046] For example, the cumene conveying assembly includes: a cumene recovery tower bottom conveying pump 7, which is connected to the bottom of the cumene recovery tower 1 and the α-methylstyrene recovery assembly.

[0047] In this embodiment, the material in the cumene recovery tower 1 is transported to the α-methylstyrene recovery module via the bottom pump 7 of the cumene recovery tower.

[0048] For example, the α-methylstyrene recovery assembly includes: an α-methylstyrene recovery tower 8, the top of which is connected to the α-methylstyrene condensation assembly, the bottom of which is connected to the α-methylstyrene conveying assembly, and the middle of which is connected to the cumene conveying assembly.

[0049] In the embodiments of this application, the α-methylstyrene recovery tower 8 receives the substance from the cumene recovery tower 1 and recovers α-methylstyrene.

[0050] For example, the α-methylstyrene recovery assembly further includes an α-methylstyrene reboiler 13, the two ends of which are respectively connected to the bottom of the α-methylstyrene recovery tower 8.

[0051] In this embodiment, the unreacted raw material in the α-methylstyrene recovery tower 8 is heated by the α-methylstyrene reboiler 13 and then re-enters the α-methylstyrene recovery tower 8 for recovery.

[0052] For example, the α-methylstyrene condensation assembly includes: an α-methylstyrene condenser 9, an α-methylstyrene reflux tank 10, an α-methylstyrene recovery tower top transfer pump 11, and an α-methylstyrene cooler 12, wherein the α-methylstyrene condenser 9 and the α-methylstyrene recovery tower top transfer pump 11 are respectively connected to the top of the α-methylstyrene recovery tower 8, the α-methylstyrene reflux tank 10 is respectively connected to the α-methylstyrene condenser 9 and the α-methylstyrene recovery tower top transfer pump 11, and the α-methylstyrene cooler 12 is respectively connected to the top of the α-methylstyrene recovery tower 8 and the α-methylstyrene storage assembly.

[0053] In this embodiment, the α-methylstyrene recovered by the α-methylstyrene recovery tower 8 is successively condensed by the α-methylstyrene condenser 9, refluxed by the α-methylstyrene reflux tank 10, conveyed by the α-methylstyrene recovery tower top conveying pump 11, and cooled by the α-methylstyrene cooler 12 before being conveyed to the α-methylstyrene storage assembly.

[0054] For example, the α-methylstyrene conveying assembly includes: an α-methylstyrene recovery tower bottom conveying pump 14, which is connected to the bottom of the α-methylstyrene recovery tower 8.

[0055] In this embodiment, the high-boiling-point substances in the α-methylstyrene recovery tower 8 are output via the bottom pump 14 of the α-methylstyrene recovery tower.

[0056] For example, the α-methylstyrene storage assembly includes an α-methylstyrene storage tank 15 and an α-methylstyrene delivery pump 16, wherein the α-methylstyrene storage tank 15 is connected to both ends of the α-methylstyrene cooler 12 and the α-methylstyrene delivery pump 16, respectively.

[0057] In this embodiment of the application, the recovered α-methylstyrene and polymerization inhibitor are transported to the α-methylstyrene storage tank 15 and then transported to the required location via the α-methylstyrene transfer pump 16.

[0058] The process of using the cumene and α-methylstyrene recycling system provided in this application is as follows: materials containing cumene and α-methylstyrene (AMS) ( Figure 1 ① (with the following mass content: 0.01% light component, 86.02% cumene, 0.46% phenol, 13.4% α-methylstyrene, and 0.11% heavy component) enters cumene recovery tower 1 (operating pressure 30 kPaG) at a flow rate of 15000 kg / h. The top vapor of cumene recovery tower 1 (temperature 162.4℃) is condensed by cumene condenser 3 and enters cumene reflux tank 4. Cubic condenser 3 produces 0.45 MPaG of vapor as a byproduct. The material in cumene reflux tank 4 is conveyed by cumene recovery tower top conveying pump 5, with part returning to cumene recovery tower 1 and part ( Figure 1② (12900 kg / h) is condensed by the cumene cooler 6 and then transported to the cumene recovery tank (cumene purity 99.5%). Part of the material in the bottom of the cumene recovery tower 1 enters the cumene reboiler 2 (temperature 179.9℃) by autosiphon. The cumene reboiler 2 uses 2MPaG steam. The other part is transported to the α-methylstyrene recovery tower 8 (operating pressure 10kPaG) by the bottom transfer pump 7 of the cumene recovery tower. The top steam (temperature 168.6℃) from α-methylstyrene recovery tower 8 is condensed by α-methylstyrene condenser 9 and then enters α-methylstyrene reflux tank 10. α-methylstyrene condenser 9 produces 0.45 MPaG steam as a byproduct. The material in α-methylstyrene reflux tank 10 is conveyed by α-methylstyrene recovery tower top transfer pump 11. Part of it returns to α-methylstyrene recovery tower 8, and the rest (flow rate 1920 kg / h, purity 99.5%) is cooled by α-methylstyrene cooler 12 and then conveyed to α-methylstyrene storage tank 15. A polymerization inhibitor is added to α-methylstyrene storage tank 15. Figure 1 (④) Ensure that the content of the polymerization inhibitor in α-methylstyrene is ≤20ppm, and that α-methylstyrene ( Figure 1 (⑤) The material in the bottom of the α-methylstyrene recovery tower 8 (temperature 175.6℃) is transported to the outside via the α-methylstyrene transfer pump 16; the material in the bottom of the α-methylstyrene recovery tower 8 (temperature 175.6℃) is transported via the bottom transfer pump 14, part of which is returned to the α-methylstyrene recovery tower 8 after passing through the α-methylstyrene reboiler 13, and part of which (flow rate 180kg / h) is used as a high-boiling point material. Figure 1 (③) The output is sent to the high-boiling-point storage tank. The α-methylstyrene reboiler 13 uses 2MPaG steam as the heat medium.

[0059] This application provides a simple, stable, low-cost, efficient, and economical recovery system for cumene and α-methylstyrene.

[0060] It should be noted that in this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0061] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0062] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0063] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0064] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A system for recovering cumene and α-methylstyrene, characterized in that, include: Cumene recovery unit, used to receive raw materials and recover cumene; A cumene condensation assembly is used to condense the substance output from the cumene recovery assembly to obtain cumene; the cumene condensation assembly is connected to the cumene recovery assembly. A cumene conveying assembly is used to convey the substance output from the cumene recovery assembly; the cumene conveying assembly is connected to the cumene recovery assembly. An α-methylstyrene recovery assembly is used to receive the substance conveyed by the cumene conveying assembly and recover α-methylstyrene; the α-methylstyrene recovery assembly is connected to the cumene conveying assembly; An α-methylstyrene condensation assembly is used to condense the substance output from the α-methylstyrene recovery assembly to obtain α-methylstyrene; the α-methylstyrene condensation assembly is connected to the α-methylstyrene recovery assembly; An α-methylstyrene conveying assembly is used to convey the substance output from the α-methylstyrene recovery assembly; the α-methylstyrene conveying assembly is connected to the α-methylstyrene recovery assembly; An α-methylstyrene storage component is used to store α-methylstyrene output from the α-methylstyrene condensation component; the α-methylstyrene storage component is connected to the α-methylstyrene condensation component.

2. The cumene and α-methylstyrene recovery system according to claim 1, characterized in that, The cumene recovery assembly includes: a cumene recovery tower, the top of which is connected to the cumene condensation assembly, and the bottom of which is connected to the cumene conveying assembly.

3. The cumene and α-methylstyrene recovery system according to claim 2, characterized in that, The cumene recovery assembly further includes an cumene reboiler, the two ends of which are connected to the bottom of the cumene recovery tower.

4. The cumene and α-methylstyrene recovery system according to claim 2, characterized in that, The cumene condensation assembly includes: a cumene condenser, a cumene reflux tank, a cumene recovery tower top delivery pump, and a cumene cooler. The cumene condenser and the cumene recovery tower top delivery pump are respectively connected to the top of the cumene recovery tower. The cumene reflux tank is connected to both the cumene condenser and the cumene recovery tower top delivery pump. The cumene cooler is connected to the top of the cumene recovery tower.

5. The cumene and α-methylstyrene recovery system according to claim 2, characterized in that, The cumene conveying assembly includes: a bottom conveying pump for the cumene recovery tower, which is connected to the bottom of the cumene recovery tower and the α-methylstyrene recovery assembly.

6. The cumene and α-methylstyrene recovery system according to claim 1, characterized in that, The α-methylstyrene recovery assembly includes: an α-methylstyrene recovery tower, the top of which is connected to the α-methylstyrene condensation assembly, the bottom of which is connected to the α-methylstyrene conveying assembly, and the middle of which is connected to the cumene conveying assembly.

7. The cumene and α-methylstyrene recovery system according to claim 6, characterized in that, The α-methylstyrene recovery assembly further includes an α-methylstyrene reboiler, the two ends of which are respectively connected to the bottom of the α-methylstyrene recovery tower.

8. The cumene and α-methylstyrene recovery system according to claim 6, characterized in that, The α-methylstyrene condensation assembly includes: an α-methylstyrene condenser, an α-methylstyrene reflux tank, an α-methylstyrene recovery tower top transfer pump, and an α-methylstyrene cooler. The α-methylstyrene condenser and the α-methylstyrene recovery tower top transfer pump are respectively connected to the top of the α-methylstyrene recovery tower. The α-methylstyrene reflux tank is connected to both the α-methylstyrene condenser and the α-methylstyrene recovery tower top transfer pump. The α-methylstyrene cooler is connected to both the top of the α-methylstyrene recovery tower and the α-methylstyrene storage assembly.

9. The cumene and α-methylstyrene recovery system according to claim 6, characterized in that, The α-methylstyrene conveying assembly includes: an α-methylstyrene recovery tower bottom conveying pump, which is connected to the bottom of the α-methylstyrene recovery tower.

10. The cumene and α-methylstyrene recovery system according to claim 8, characterized in that, The α-methylstyrene storage assembly includes an α-methylstyrene storage tank and an α-methylstyrene delivery pump, wherein the α-methylstyrene storage tank is connected to both ends of the α-methylstyrene cooler and the α-methylstyrene delivery pump.

Images