Reactor for producing alpha-olefin
The loop reactor design solved the problems of intermittent production and oligomer adhesion to the walls of the batch reactor, realizing continuous production and high selectivity of α-olefins. It also solved the difficulties in equipment design and operation in the existing technology, and improved production efficiency and product yield.
Patent Information
- Application Number
- CN202422967463.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing batch reactors for the production of α-olefins suffer from problems such as intermittent production, low reaction efficiency, low selectivity and yield, difficulty in product separation, high energy consumption, and difficulties in equipment design and manufacturing when scaled up. Furthermore, ethylene forms oligomers that adhere to the walls under the influence of catalysts and solvents, making long-term operation impossible.
The reactor adopts a loop reactor design, which is formed by connecting U-shaped tubes and bends. It is equipped with inlets for reactants and catalysts, uses an axial flow pump to achieve liquid circulation reaction, and absorbs the heat of reaction through jacket cooling water. The products are collected through the reaction product outlet to achieve continuous production. At the same time, the scale and operation mode of the device can be adjusted to solve the problem of oligomers adhering to the wall.
It enables continuous production of α-olefins, improves selectivity and yield, has simple equipment, is easy to operate and maintain, can operate stably for a long period of time, and reduces the formation of oligomers.
Smart Images
Figure CN223464797U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fine material processing technical field, especially relate to a reactor for producing alpha-olefin. BACKGROUND
[0002] Linear alpha-olefins (LAO) are important fine chemical raw materials, and different length molecular chains have different uses: C4-C8 is used for high-density and low-density polyethylene, C10-C12 is used for polymerization to prepare high-grade lubricating oil, C12-C16 is used for preparing detergent, and other uses are preparing alcohol, epoxide, amine, mercaptan and synthetic fatty acid.
[0003] The production methods of alpha-olefin mainly include wax cracking method, ethylene oligomerization method, extraction separation method, fatty alcohol dehydrogenation method, internal olefin isomerization method and Alfene method; among them, the wax cracking method and the fatty alcohol dehydrogenation method have been basically eliminated due to low yield, high cost, poor product quality and complex process; the internal olefin isomerization method, the Alfene method and the ethylene oligomerization method of Exxon Company have not been able to realize industrialized production due to technical and economic reasons, and the extraction separation method is also less used; at present, the main methods for producing alpha-olefin are ethylene oligomerization method, ethylene trimerization method and ethylene trimerization method.
[0004] The kettle type reactor used in the traditional process still has problems to be solved, firstly, the reaction kettle with stirring is used as the reactor to produce alpha-olefin, which can only produce intermittently, the reaction efficiency is low, the product alpha-olefin has low selectivity and low yield, which causes difficult separation of the product and high energy consumption; secondly, with the expansion of the production device scale, the kettle type reactor has problems of amplification effect, and after the large-scale of the device, the equipment is difficult to design and manufacture, and alpha-olefin is generated from ethylene in the presence of catalyst and solvent, which generally has problems of wall hanging of oligomers, and cannot guarantee long-period operation, therefore, it is necessary to design a reactor for producing alpha-olefin. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a reactor for producing alpha-olefin, which solves the problems that the reaction kettle with stirring is used as the reactor to produce alpha-olefin, which can only produce intermittently, the reaction efficiency is low, the product alpha-olefin has low selectivity and low yield, which causes difficult separation of the product and high energy consumption; secondly, with the expansion of the production device scale, the kettle type reactor has problems of amplification effect, and after the large-scale of the device, the equipment is difficult to design and manufacture, and alpha-olefin is generated from ethylene in the presence of catalyst and solvent, which generally has problems of wall hanging of oligomers, and cannot guarantee long-period operation.
[0006] In order to solve the above technical problems, the utility model provides the following technical scheme: a reactor for producing alpha-olefin, first U type pipe is fixedly connected on one end of first elbow pipe, one end of second U type pipe is fixed on the other end of first elbow pipe, one end of second elbow pipe is fixedly connected on the other end of second U type pipe, one end of third U type pipe is fixedly connected on the other end of second elbow pipe, one end of third elbow pipe is fixedly connected on the other end of third U type pipe, one end of fourth U type pipe is fixedly connected on the other end of third elbow pipe, one end of reflux pipe is fixedly connected on the other end of fourth U type pipe, the other end of reflux pipe is fixedly connected on one end of first U type pipe, shaft flow pump is fixedly connected on first U type pipe, shaft flow pump is fixedly connected on third U type pipe.
[0007] As a further technical scheme of the utility model, the third U type pipe is provided with a reaction raw material inlet, the reaction raw material inlet is arranged on the first U type pipe, and the first U type pipe is provided with a catalyst inlet.
[0008] As a further technical scheme of the utility model, the catalyst inlet is arranged on the third U type pipe, a jacket is fixedly connected on the third U type pipe, the jacket is fixedly connected on the first U type pipe, the jacket is fixedly connected on the second U type pipe, and the jacket is fixedly connected on the fourth U type pipe.
[0009] As a further technical scheme of the utility model, the fourth U type pipe is provided with a reaction product outlet, the reaction product outlet is arranged on the second U type pipe, an expansion joint is fixedly connected on the second U type pipe, the expansion joint is fixedly connected on the first U type pipe, the expansion joint is fixedly connected on the third U type pipe, the expansion joint is fixedly connected on the fourth U type pipe, and the expansion joint is fixedly connected on the jacket.
[0010] As a further technical scheme of the utility model, the jacket is provided with a cooling water inlet, the jacket is provided with a cooling water outlet, a transmission water pipe is fixedly connected in the jacket, the jacket is provided with a vent, and a first fixing frame is fixedly connected on the jacket.
[0011] As a further technical scheme of the utility model, one end of the telescopic rod is fixedly connected on the first fixing frame, the other end of the telescopic rod is fixedly connected on the second fixing frame, and the second fixing frame is slidingly connected on the jacket.
[0012] As a further technical scheme of the utility model, the reflux pipe is provided with a safety valve, the safety valve is arranged on the first elbow pipe, the safety valve is arranged on the second elbow pipe, and the safety valve is arranged on the third elbow pipe.
[0013] The utility model provides a kind of reactor for producing alpha-olefin, its advantage is at: by being added raw material to pipe by the reaction raw material inlet on the first U-shaped pipe and third U-shaped pipe, by being added catalyst to pipe by the catalyst inlet on the first U-shaped pipe and third U-shaped pipe, by the axial flow pump working to be arranged on the first U-shaped pipe and third U-shaped pipe to make pipe liquid circulation reaction, simultaneously by cooling water import to the jacket and transmission water pipe and transport cooling water, by cooling water absorption reaction heat, and by cooling water export and discharge, and by the reaction product outlet on the second U-shaped pipe and fourth U-shaped pipe and collect reaction product, again by separation and obtain alpha-olefin production product, alpha-olefin production reactor uses loop reactor, realizes reactor continuous production, with advanced technology, equipment is simple, operation and maintenance are convenient, alpha-olefin selectivity and yield higher characteristics;The position of second fixed frame is adjusted by telescopic link, equipment is fixed by the first fixed frame and second fixed frame, when the scale of device is expanded, just according to the connection mode of the first U-shaped pipe, second U-shaped pipe, third U-shaped pipe and fourth U-shaped pipe and the rest U-shaped pipe can be connected in sequence, simultaneously in reaction process, raw material ethylene is injected into reactor from multiple reaction raw material inlet positions, ethylene, catalyst, reaction product in reactor is more uniform, reaction is more stable, and the oligomer produced is less, long-period stable operation can be realized, and according to oligomer wall-hanging condition, axial flow pump uses 1 running, or 2 running and multiple operating modes, solve oligomer wall-hanging, long-period operation problem. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0015] Figure 1 It is the whole structure schematic diagram of the utility model;
[0016] Figure 2 It is Figure 1 The local structure enlarged view of area A in it;
[0017] Figure 3 It is Figure 1 The local structure enlarged view of area B in it.
[0018] In the figure: 1, the first U-shaped tube; 2, the first elbow; 3, the second U-shaped tube; 4, the second elbow; 5, the third U-shaped tube; 6, the third elbow; 7, the fourth U-shaped tube; 8, the return pipe; 9, the axial flow pump; 10, the reaction raw material inlet; 11, the catalyst inlet; 12, the jacket; 13, the reaction product outlet; 14, the expansion joint; 15, the cooling water inlet; 16, the transmission water pipe; 17, the vent; 18, the first fixed frame; 19, the telescopic rod; 20, the second fixed frame; 21, the safety valve port; 22, the cooling water outlet. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0020] In the description of the present application, it should be noted that, unless explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0021] Please refer to the drawings Figure 1 - the drawings Figure 3The utility model provides an embodiment: a reactor of production alpha -olefin, including first U type pipe 1, one end of first U type pipe 1 is fixedly connected on one end of first elbow pipe 2, the other end of first elbow pipe 2 is fixed with one end of second U type pipe 3, one end of second U type pipe 3 is fixedly connected with second elbow pipe 4, one end of second elbow pipe 4 is fixedly connected with one end of third U type pipe 5, one end of third U type pipe 5 is fixedly connected with one end of third elbow pipe 6, one end of third elbow pipe 6 is fixedly connected with one end of fourth U type pipe 7, one end of fourth U type pipe 7 is fixedly connected with one end of reflux pipe 8, one end of reflux pipe 8 is fixedly connected on one end of first U type pipe 1, and the shaft flow pump 9 is fixedly connected on first U type pipe 1, and the shaft flow pump 9 is fixedly connected on third U type pipe 5, and the reaction raw material entrance 10 is arranged on third U type pipe 5, and the reaction raw material entrance 10 is arranged on first U type pipe 1, and the catalyst entrance 11 is arranged on third U type pipe 5, and the catalyst entrance 11 is arranged on third U type pipe 5, and the jacket 12 is fixedly connected on third U type pipe 5, and the jacket 12 is fixedly connected on first U type pipe 1, and the jacket 12 is fixedly connected on second U type pipe 3, and the jacket 12 is fixedly connected on fourth U type pipe 7, and the reaction product outlet 13 is arranged on fourth U type pipe 7, and the reaction product outlet 13 is arranged on second U type pipe 3, and the expansion joint 14 is fixedly connected on second U type pipe 3, and the expansion joint 14 is fixedly connected on first U type pipe 1, and the expansion joint 14 is fixedly connected on third U type pipe 5, and the expansion joint 14 is fixedly connected on fourth U type pipe 7, and the expansion joint 14 is fixedly connected on jacket 12, and the cooling water inlet 15 is arranged on jacket 12, and the cooling water outlet 22 is arranged on jacket 12, and the transmission water pipe 16 is fixedly connected in jacket 12, and the venting mouth 17 is arranged on jacket 12, and the first fixed frame 18 is fixedly connected on jacket 12, and one end of telescopic link 19 is fixedly connected on first fixed frame 18, and the other end of telescopic link 19 is fixedly connected on second fixed frame 20, and second fixed frame 20 is slidably connected on jacket 12, and the safety valve mouth 21 is arranged on reflux pipe 8, and the safety valve mouth 21 is arranged on first elbow pipe 2, and the safety valve mouth 21 is arranged on second elbow pipe 4, and second elbow pipe 4 is used for connecting second U type pipe 3 and third U type pipe 5, and the safety valve mouth 21 is arranged on third elbow pipe 6, and third elbow pipe 6 is used for connecting third U type pipe 5 and fourth U type pipe 7.
[0022] Specifically, in use, first, raw materials are added into the pipes through the raw material inlets 10 arranged on the first U-shaped pipe 1 and the third U-shaped pipe 5, catalysts are added into the pipes through the catalyst inlets 11 arranged on the first U-shaped pipe 1 and the third U-shaped pipe 5, the shaft flow pump 9 arranged on the first U-shaped pipe 1 and the third U-shaped pipe 5 is operated to make the liquid in the pipes circulate and react, cooling water is transported into the jacket 12 and the conveying water pipe 16 through the cooling water inlet 15, the reaction heat is absorbed by the cooling water, and the cooling water is discharged through the cooling water outlet 22, the reaction products are collected through the reaction product outlet 13 arranged on the second U-shaped pipe 3 and the fourth U-shaped pipe 7, and the alpha-olefin production product is obtained through separation, the alpha-olefin production reactor adopts a loop reactor, continuous production of the reactor is realized, and the alpha-olefin production reactor has the characteristics of advanced process technology, simple equipment, convenient operation and maintenance, high alpha-olefin selectivity and yield, etc.; the position of the second fixing frame 20 is adjusted through the telescopic rod 19, the equipment is fixed through the first fixing frame 18 and the second fixing frame 20, when the scale of the device is expanded, the remaining U-shaped pipes can be sequentially connected according to the connection mode of the first U-shaped pipe 1, the second U-shaped pipe 3, the third U-shaped pipe 5 and the fourth U-shaped pipe 7, and in the reaction process, the raw material ethylene is injected into the reactor from the multiple raw material inlets 10, the ethylene, the catalyst and the reaction product in the reactor are more uniform, the reaction is more stable, less oligomers are produced, long-period stable operation can be realized, and the shaft flow pump 9 can be operated in multiple modes such as one operation or two operations according to the oligomer walling condition, so that the problem of oligomer walling and long-period operation is solved.
[0023] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation", "connection", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements inside. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0024] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. Those skilled in the art can understand and implement without creative labor.
[0025] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A reactor for the production of alpha-olefins comprising a first U-tube (1), characterized in that: One end of the first U-shaped pipe (1) is fixedly connected to one end of the first elbow pipe (2), the other end of the first elbow pipe (2) is fixedly connected to one end of the second U-shaped pipe (3), the other end of the second U-shaped pipe (3) is fixedly connected to one end of the second elbow pipe (4), the other end of the second elbow pipe (4) is fixedly connected to one end of the third U-shaped pipe (5), the other end of the third U-shaped pipe (5) is fixedly connected to one end of the third elbow pipe (6), the other end of the third elbow pipe (6) is fixedly connected to one end of the fourth U-shaped pipe (7), the other end of the fourth U-shaped pipe (7) is fixedly connected to one end of the return pipe (8), the other end of the return pipe (8) is fixedly connected to one end of the first U-shaped pipe (1), the first U-shaped pipe (1) is fixedly connected with the axial flow pump (9), and the axial flow pump (9) is fixedly connected to the third U-shaped pipe (5).
2. A reactor for producing alpha-olefins according to claim 1, characterized in that: The third U-shaped pipe (5) is provided with a reaction raw material inlet (10), the reaction raw material inlet (10) is arranged on the first U-shaped pipe (1), and the first U-shaped pipe (1) is provided with a catalyst inlet (11).
3. A reactor for producing alpha-olefins according to claim 2, characterized in that: The catalyst inlet (11) is arranged on the third U-shaped pipe (5), the third U-shaped pipe (5) is fixedly connected with a jacket (12), the jacket (12) is fixedly connected to the first U-shaped pipe (1), the jacket (12) is fixedly connected to the second U-shaped pipe (3), and the jacket (12) is fixedly connected to the fourth U-shaped pipe (7).
4. A reactor for producing alpha-olefins according to claim 3, characterized in that: The fourth U-shaped pipe (7) is provided with a reaction product outlet (13), the reaction product outlet (13) is arranged on the second U-shaped pipe (3), the second U-shaped pipe (3) is fixedly connected with an expansion joint (14), the expansion joint (14) is fixedly connected to the first U-shaped pipe (1), the expansion joint (14) is fixedly connected to the third U-shaped pipe (5), the expansion joint (14) is fixedly connected to the fourth U-shaped pipe (7), and the expansion joint (14) is fixedly connected to the jacket (12).
5. A reactor for producing alpha-olefins according to claim 4, characterized in that: The jacket (12) is provided with a cooling water inlet (15) and a cooling water outlet (22), a transmission water pipe (16) is fixedly connected in the jacket (12), the jacket (12) is provided with a vent (17), and the jacket (12) is fixedly connected with a first fixing frame (18).
6. A reactor for producing alpha-olefins according to claim 5, characterized in that: One end of the first fixing frame (18) is fixedly connected with one end of the telescopic rod (19), the other end of the telescopic rod (19) is fixedly connected to the second fixing frame (20), and the second fixing frame (20) is slidingly connected to the jacket (12).
7. The reactor for producing α-olefins according to claim 1, wherein: The return pipe (8) is provided with a safety valve (21), the safety valve (21) is arranged on the first elbow pipe (2), the safety valve (21) is arranged on the second elbow pipe (4), and the safety valve (21) is arranged on the third elbow pipe (6).