Reaction kettle for preparing neodecanoic acid

Abstract

The utility model relates to the technical field of neodecanoic acid preparation, and disclose a kind of reaction kettle for neodecanoic acid preparation, including reaction kettle body, the support rack of being sleeved in the bottom outside of reaction kettle body, the top and bottom of the reaction kettle body are respectively equipped with stirring mechanism, discharge valve pipe, and stirring mechanism can be stored raw material inside reaction kettle body and is automatically stirred, the top of the reaction kettle body is respectively equipped with liquid feed valve pipe, gas feed valve pipe, gas phase output pipe, the inside of the bottom of the reaction kettle body is sleeved with support sleeve, movable cylinder piece, sealing structure.The utility model is equipped with support sleeve, movable cylinder piece, sealing structure and support seat, Y type connecting pipe composition multifunctional feeding device, subsequent in satisfying the carbon monoxide conveying demand outside, non-use state's feeding device and check valve can be carried out double check protection effect inside and outside reaction kettle body, to fully solve the problems existing in prior art.

Description

Technical Field

[0001] This utility model relates to the field of neodecanoic acid preparation technology, specifically a reaction vessel for preparing neodecanoic acid. Background Technology

[0002] Neodecanoic acid is a collective term for a series of decanoic acid isomers with branches on the α carbon atom. In practical applications, it can be used as a surfactant, lubricant, and plastic additive. In addition, neodecanoic acid is also an excellent adhesion promoter between radial tire rubber and metal. It is suitable for bonding rubber to brass-plated, galvanized steel wire, cable wire, and metal sheet, and has a very wide range of applications.

[0003] Currently, there are several main methods for producing neodecanoic acid: one is to use tripropylene as raw material, which undergoes a carbonylation reaction with carbon monoxide and water under the action of a catalyst, followed by separation and purification steps to obtain neodecanoic acid; the other is to prepare it through the carboxylation reaction of olefins, where olefins are first reacted with carbon monoxide and water under specific conditions to generate a mixture of carboxylic acids, and then neodecanoic acid is separated by distillation. Regardless of the method, a reaction vessel is a necessary piece of equipment, and it must be a reaction vessel capable of maintaining a high-pressure environment to ensure the reaction efficiency of raw materials such as carbon monoxide. However, in existing technologies, to prevent the reverse flow of liquid raw materials due to sudden changes in gas pressure in the pipe structure that supplies carbon monoxide to the reaction vessel, check valves are usually installed on the inner part of the pipe structure at the bottom of the reaction vessel. However, while this alleviates the problem of reverse flow of liquid raw materials, some highly corrosive raw materials can corrode the check valve during the reaction process, posing a significant risk of check valve failure. The problem has not been fundamentally solved. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a reaction vessel for the preparation of neodecanoic acid, which solves the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a reaction vessel for preparing neodecanoic acid, comprising a reaction vessel body and a support frame fitted on the outside of the bottom of the reaction vessel body. The top and bottom of the reaction vessel body are respectively equipped with a stirring mechanism and a discharge valve pipe. The stirring mechanism can automatically stir the raw materials stored inside the reaction vessel body. The top of the reaction vessel body is respectively equipped with a liquid inlet valve pipe, a gas inlet valve pipe, and a gas phase outlet pipe. The inner side of the bottom of the reaction vessel body is fitted with a support sleeve, a movable cylinder, and a sealing structure. The bottom of the movable cylinder is fitted on the inner side of the top of the support sleeve and cooperates with the inner wall of the support sleeve to form a clearance space. The bottom of the support sleeve is provided with a gas guide hole communicating with the clearance space.

[0006] The top structure of the sealing structure is slidably installed on the inner side of the middle of the movable cylinder, and the bottom structure of the sealing structure is fitted into the clearance space and can reciprocate to open and close the air guide hole. A Y-shaped connecting pipe is provided between the support sleeve and the gas feed valve pipe. The two ends of the Y-shaped connecting pipe away from the gas feed valve pipe are respectively fitted into the inside of the support sleeve and the inside of the movable cylinder. The bottom of the movable cylinder is provided with a pressure relief valve that communicates with the clearance space.

[0007] Preferably, a support base is installed between the surface of the support sleeve and the bottom inner wall of the reactor body, and an air vent space exists between the support sleeve and the bottom inner wall of the reactor body under the support of the support base.

[0008] Preferably, the movable cylinder includes a bottom cylinder, an annular folding tube, and a linkage plate. The annular folding tube is installed between the bottom of the linkage plate and the top of the bottom cylinder and can reciprocate to expand or contract. The surface of the bottom of the bottom cylinder is fixed to the inner wall of the top of the support sleeve, and a pressure relief valve is opened on the inner wall of the bottom of the bottom cylinder.

[0009] Several return springs are installed between the bottom surface of the bottom cylinder and the bottom surface of the linkage plate, and the several return springs are arranged and installed along the circumference of the bottom cylinder.

[0010] Preferably, the sealing structure includes a constraint shaft, a movable plate, and a sealing plug. The movable plate is movably fitted within the clearance space. One end of the constraint shaft passes through the inner side of the middle of the bottom cylinder and is fixed to the bottom surface of the middle of the linkage plate. The other end of the constraint shaft is fixed to the top surface of the middle of the movable plate. A sealing ring is nested inside the fitting joint between the constraint shaft and the bottom cylinder. One end of the sealing plug is fixed to the bottom surface of the movable plate and can move synchronously with the constraint shaft and the movable plate to reciprocate and open / close the air guide hole.

[0011] The number of air guide holes and the number of sealing plugs are both no less than two, and they are aligned one by one.

[0012] Preferably, the Y-shaped connecting pipe, the support sleeve, the support base, the movable cylinder, the sealing structure, and the inner lining plate of the reactor body are all made of Hastelloy material. The two ends of the Y-shaped connecting pipe away from the gas feed valve pipe are respectively fixedly sleeved on the bottom inner side of the bottom cylinder and the top inner side of the support sleeve. The structure of the gas feed valve pipe located on the bottom outer side of the reactor body is equipped with a check valve.

[0013] Preferably, a base is installed at the bottom of the support frame, and a condenser and a gas-liquid separator are installed on one side of the base. The input end of one side of the condenser is connected to the gas phase output pipe through a conduit, and the output end of the other side of the condenser is connected to the input end of the gas-liquid separator through a conduit. The condenser and the gas-liquid separator can sequentially condense and separate the mixed gas discharged from the gas phase output pipe.

[0014] Preferably, the front and rear ends of both sides of the bottom of the base are equipped with walking wheels with braking and limiting structures.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model is a multi-functional feeding device composed of a support sleeve, movable cylinder, sealing structure, support base, and Y-type connecting pipe. In addition to meeting the requirements for carbon monoxide transportation, the feeding device and check valve can provide double check protection inside and outside the reactor body when not in use, thus fully solving the problems existing in the prior art.

[0017] 2. This utility model consists of a condenser, a gas-liquid separator, and a base to form a separation device. It is then used in combination with the reactor body and related structures to combine unreacted carbon monoxide and volatile byproducts generated and discharged during the specific production process of the reactor body into a mixed gas. The condenser and gas-liquid separator then sequentially condense and separate the gas and liquid components. Furthermore, the separated carbon monoxide can be reused after being recompressed by existing compression equipment, thereby reducing the cost of use. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a rear view schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a cross-sectional schematic diagram of the structural support sleeve of this utility model;

[0021] Figure 4 This is a bottom view of the structural support sleeve of this utility model;

[0022] Figure 5 This is a top view of the movable cylindrical component of this utility model.

[0023] Figure 6 This is a partial cross-sectional schematic diagram of the main body of the reaction vessel of this utility model;

[0024] Figure 7 This is a front view of the structural base of this utility model.

[0025] In the diagram: 1. Reactor body; 2. Support frame; 3. Discharge valve pipe; 4. Stirring mechanism; 5. Liquid feed valve pipe; 6. Gas feed valve pipe; 7. Support sleeve; 8. Movable cylinder; 81. Bottom cylinder; 82. Annular folded pipe; 83. Linkage plate; 84. Return spring; 9. Sealing structure; 91. Constraint shaft; 92. Movable plate; 93. Sealing plug; 10. Gas guide hole; 11. Support base; 12. Y-type connecting pipe; 13. Check valve; 14. Pressure relief valve; 15. Condenser; 16. Gas-liquid separator; 17. Base; 18. Gas phase output pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-6 A reaction vessel for preparing neodecanoic acid includes a reaction vessel body 1 and a support frame 2 fitted around the bottom of the reaction vessel body 1. A stirring mechanism 4 and a discharge valve pipe 3 are respectively installed at the top and bottom of the reaction vessel body 1. The stirring mechanism 4 can automatically stir the raw materials stored inside the reaction vessel body 1. A liquid inlet valve pipe 5, a gas inlet valve pipe 6, and a gas phase outlet pipe 18 are respectively installed at the top of the reaction vessel body 1. A support sleeve 7, a movable cylinder 8, and a sealing structure 9 are fitted inside the bottom of the reaction vessel body 1. The bottom of the movable cylinder 8 is fitted inside the top of the support sleeve 7 and is connected to the support sleeve. The inner wall of the support sleeve 7 forms a clearance space. The bottom of the support sleeve 7 is provided with a vent hole 10 that communicates with the clearance space. The top structure of the sealing structure 9 is slidably installed on the inner side of the middle part of the movable cylinder 8. The bottom structure of the sealing structure 9 is fitted in the clearance space and can reciprocate to open and close the vent hole 10. A Y-type connecting pipe 12 is provided between the support sleeve 7 and the gas feed valve pipe 6. The two ends of the Y-type connecting pipe 12 away from the gas feed valve pipe 6 are respectively fitted inside the support sleeve 7 and inside the movable cylinder 8. The bottom of the movable cylinder 8 is provided with a pressure relief valve 14 that communicates with the clearance space.

[0028] A support base 11 is installed between the surface of the support sleeve 7 and the bottom inner wall of the reactor body 1. Under the support of the support base 11, there is an air vent space between the support sleeve 7 and the bottom inner wall of the reactor body 1. The movable cylinder 8 includes a bottom cylinder 81, an annular folded tube 82, and a linkage plate 83. The annular folded tube 82 is installed between the bottom of the linkage plate 83 and the top of the bottom cylinder 81 and can reciprocate to expand or contract. The bottom surface of the bottom cylinder 81 is fixed to the inner wall of the top of the support sleeve 7. The pressure relief valve 14 is opened on the inner wall of the bottom of the bottom cylinder 81. Several return springs 84 are installed between the bottom surface of the bottom cylinder 81 and the bottom surface of the linkage plate 83. The several return springs 84 are arranged along the circumference of the bottom cylinder 81, thereby ensuring the automatic reset effect of the linkage plate 83 and the annular folded tube 82.

[0029] The sealing structure 9 includes a constraint shaft 91, a movable plate 92, and a sealing plug 93. The movable plate 92 is movably fitted into the clearance space. One end of the constraint shaft 91 passes through the inner side of the middle of the bottom cylinder 81 and is fixed to the bottom surface of the middle of the linkage plate 83. The other end of the constraint shaft 91 is fixed to the top surface of the middle of the movable plate 92. A sealing ring is nested inside the fitting part of the constraint shaft 91 and the bottom cylinder 81. One end of the sealing plug 93 is fixed to the bottom surface of the movable plate 92 and can move synchronously with the constraint shaft 91 and the movable plate 92 to reciprocate and open and close the air guide hole 10. The number of air guide holes 10 and the number of sealing plugs 93 are both not less than two and are aligned one by one to meet the efficiency of air delivery.

[0030] The Y-type connecting pipe 12, the support sleeve 7, the support base 11, the movable cylinder 8, the sealing structure 9, and the inner lining plate of the reactor body 1 are all made of Hastelloy material, thereby improving the corrosion resistance of the internal interconnected structures of the reactor body 1. The two ends of the Y-type connecting pipe 12 away from the gas feed valve pipe 6 are respectively fixedly sleeved on the bottom inner side of the bottom cylinder 81 and the top inner side of the support sleeve 7. The gas feed valve pipe 6 is located on the structure on the bottom outer side of the reactor body 1 and is equipped with a check valve 13.

[0031] In use, liquid raw materials enter the interior of the reactor body 1 through the liquid feed valve pipe 5, while carbon monoxide is transported into the Y-type connecting pipe 12 through the gas feed valve pipe 6. Then, the two ends of the Y-type connecting pipe 12 away from the gas feed valve pipe 6 enter the interior of the movable cylinder 8 and the interior of the support sleeve 7, respectively. As the movable cylinder 8 continuously receives gas and its internal pressure gradually increases, the annular folded pipe 82 expands and deforms, and the return spring 84 is stretched and deformed to make room. This causes the constraint shaft 91 and the sealing plug 93 to move synchronously and cause the sealing plug 93 to disengage from the air guide hole 10, making room for the air guide hole 10. At the same time, the carbon monoxide inside the support sleeve 7 enters the liquid raw materials inside the reactor body 1 through the air guide hole 10 to meet the feeding requirements. Then, the stirring mechanism 4 is activated to automatically stir the mixed raw materials inside the reactor body 1.

[0032] After a cycle of feeding is completed and carbon monoxide delivery is stopped, the linkage plate 83 and the annular folded tube 82 will drive the sealing structure 9 to move back to its original position under the reset force of multiple reset springs 84. This will cause the sealing plug 93 to re-engage with the air guide hole 10 for sealing. In conjunction with the check valve 13, a double check valve protection effect can be achieved. Furthermore, the movable cylinder 8, the sealing structure 9, the support sleeve 7, and the Y-type connecting pipe 12 are all supported by corrosion-resistant materials, ensuring a long service life and thus solving the problems existing in the prior art.

[0033] Please see Figure 7 The bottom of the support frame 2 is equipped with a base 17. A condenser 15 and a gas-liquid separator 16 are installed on one side of the base 17. The input end of one side of the condenser 15 is connected to the gas phase output pipe 18 through a conduit. The output end of the other side of the condenser 15 is connected to the input end of the gas-liquid separator 16 through a conduit. The condenser 15 and the gas-liquid separator 16 can sequentially condense and separate the mixed gas discharged from the gas phase output pipe 18. The front and rear ends of both sides of the bottom of the base 17 are equipped with traveling wheels with brake limit structures.

[0034] During use, the waste gas generated in the specific production process of the reactor body 1, namely unreacted carbon monoxide and volatile by-products, is a mixed gas that is discharged through the gas phase output pipe 18. Then, it is condensed and separated into gas and liquid in sequence through the condenser 15 and the gas-liquid separator 16. Furthermore, the separated carbon monoxide can be reused after being recompressed by existing compression equipment, thereby reducing the cost of use.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reaction vessel for preparing neodecanoic acid, comprising a reaction vessel body (1) and a support frame (2) fitted around the bottom of the reaction vessel body (1), wherein a stirring mechanism (4) and a discharge valve pipe (3) are respectively installed at the top and bottom of the reaction vessel body (1), and the stirring mechanism (4) is capable of automatically stirring the raw materials stored inside the reaction vessel body (1), wherein a liquid inlet valve pipe (5), a gas inlet valve pipe (6), and a gas phase output pipe (18) are respectively installed at the top of the reaction vessel body (1), characterized in that: The bottom of the reactor body (1) is fitted with a support sleeve (7), a movable cylinder (8), and a sealing structure (9). The bottom of the movable cylinder (8) is fitted inside the top of the support sleeve (7) and cooperates with the inner wall of the support sleeve (7) to form a clearance space. The bottom of the support sleeve (7) is provided with a gas guide hole (10) that communicates with the clearance space. The top structure of the sealing structure (9) is slidably installed on the inner side of the middle of the movable cylinder (8), and the bottom structure of the sealing structure (9) is fitted in the clearance space and can reciprocate to open and close the air guide hole (10). A Y-shaped connecting pipe (12) is provided between the support sleeve (7) and the gas feed valve pipe (6). The two ends of the Y-shaped connecting pipe (12) away from the gas feed valve pipe (6) are respectively fitted inside the support sleeve (7) and inside the movable cylinder (8). A pressure relief valve (14) communicating with the clearance space is opened at the bottom of the movable cylinder (8).

2. The reactor for preparing neodecanoic acid according to claim 1, characterized in that: A support base (11) is installed between the surface of the support sleeve (7) and the bottom inner wall of the reactor body (1), and an air outlet space exists between the support sleeve (7) and the bottom inner wall of the reactor body (1) under the support of the support base (11).

3. The reactor for preparing neodecanoic acid according to claim 1, characterized in that: The movable cylinder (8) includes a bottom cylinder (81), an annular folded tube (82), and a linkage plate (83). The annular folded tube (82) is installed between the bottom of the linkage plate (83) and the top of the bottom cylinder (81) and can reciprocate to expand or contract. The bottom surface of the bottom cylinder (81) is fixed to the inner wall of the top of the support sleeve (7), and a pressure relief valve (14) is opened on the inner wall of the bottom of the bottom cylinder (81). A plurality of reset springs (84) are installed between the bottom surface of the bottom cylinder (81) and the bottom surface of the linkage plate (83), and the plurality of reset springs (84) are arranged and installed along the circumference of the bottom cylinder (81).

4. The reactor for preparing neodecanoic acid according to claim 3, characterized in that: The sealing structure (9) includes a constraint shaft (91), a movable plate (92), and a sealing plug (93). The movable plate (92) is movably fitted in the clearance space. One end of the constraint shaft (91) passes through the inner side of the middle of the bottom cylinder (81) and is fixed to the bottom surface of the middle of the linkage plate (83). The other end of the constraint shaft (91) is fixed to the top surface of the middle of the movable plate (92). A sealing ring is nested in the fitting part between the constraint shaft (91) and the bottom cylinder (81). One end of the sealing plug (93) is fixed to the bottom surface of the movable plate (92) and can move synchronously with the constraint shaft (91) and the movable plate (92) to reciprocate the fitting and opening / closing of the air guide hole (10). The number of air guide holes (10) and the number of sealing plugs (93) are both no less than two and are aligned one by one.

5. The reactor for preparing neodecanoic acid according to claim 4, characterized in that: The Y-type connecting pipe (12), the support sleeve (7), the support base (11), the movable cylinder (8), the sealing structure (9), and the inner lining plate of the reactor body (1) are all made of Hastelloy material. The two ends of the Y-type connecting pipe (12) away from the gas feed valve pipe (6) are respectively fixedly sleeved on the bottom inner side of the bottom cylinder (81) and the top inner side of the support sleeve (7). The gas feed valve pipe (6) located on the outer side of the bottom of the reactor body (1) is equipped with a check valve (13).

6. The reactor for preparing neodecanoic acid according to claim 1, characterized in that: The bottom of the support frame (2) is equipped with a base (17). A condenser (15) and a gas-liquid separator (16) are installed on one side of the base (17). The input end of one side of the condenser (15) is connected to the gas phase output pipe (18) through a conduit. The output end of the other side of the condenser (15) is connected to the input end of the gas-liquid separator (16) through a conduit. The condenser (15) and the gas-liquid separator (16) can sequentially condense and separate the mixed gas discharged from the gas phase output pipe (18).

7. The reactor for preparing neodecanoic acid according to claim 6, characterized in that: The base (17) has wheels with brake limiting structures installed at the front and rear ends on both sides of its bottom.

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