Isononanoyl chloride synthesis reaction kettle

Abstract

The utility model provides an isononanoyl chloride synthesis reaction kettle. The isononanoyl chloride synthesis reaction kettle comprises a kettle body, a nitrogen input pipeline, an isononanoic acid input pipeline and a phosgene input pipeline, the kettle body is provided with a temperature control jacket, a discharge port at the bottom, a tail gas outlet and an emergency gas release port at the top and a stirring device inside; the nitrogen input pipeline comprises a nitrogen main pipe extending into the inner bottom of the kettle body and a nitrogen ring pipe communicated with the nitrogen main pipe; a plurality of nitrogen outlet holes are formed in the nitrogen ring pipe; the isononanoic acid input pipeline extends into the inner cavity of the kettle body, is of a sleeve structure and comprises an inner pipe and an outer pipe; an isononanoic acid inlet communicated with the inner cavity of the outer pipe is formed in the outer pipe; the phosgene input pipeline comprises a phosgene main pipe extending into the bottom in the kettle body and a phosgene ring pipe communicated with the phosgene main pipe; a plurality of phosgene outlet holes are distributed in the phosgene ring pipe; a phosgene branch pipe communicated with the inner cavity of the inner pipe is arranged on the phosgene main pipe. The isononanoyl chloride synthesis reaction kettle disclosed by the utility model realizes uniform mixing and efficient reaction of reactants, effectively reduces phosgene residues in reaction completion liquid, and improves synthesis efficiency and product quality.

Description

Technical Field

[0001] This utility model belongs to the field of isononanoyl chloride synthesis technology, and in particular relates to an isononanoyl chloride synthesis reactor. Background Technology

[0002] Isononanoyl chloride (3,5,5-trimethylhexanoyl chloride) is an important organic acyl chloride compound with the chemical formula C9H2O. 17 ClO. It is typically a colorless to pale yellow liquid at room temperature with a pungent odor. Isonononyl chloride possesses the general chemical properties of acyl chloride compounds, exhibiting high reactivity and readily undergoing acylation reactions with amines, alcohols, etc., to form the corresponding amides or esters. This reactivity makes it valuable for applications in organic synthesis.

[0003] Currently, the common methods for synthesizing isononanoyl chloride mainly include the phosgene method and the thionyl chloride method. Among them, the phosgene method, as a traditional preparation method, has the advantages of mild reaction conditions, high product purity, and high yield. In the phosgene method, the reactants isononanoic acid and phosgene react in a reactor at a controlled temperature of about 170°C. After the reaction is completed, nitrogen gas needs to be introduced to expel the residual phosgene and other by-product gases in the liquid in the reactor. Finally, the degassed liquid is sent to a vacuum distillation vessel for vacuum distillation to obtain isononanoyl chloride. The existing reactor structure design is unreasonable. The phosgene and isononanoic acid introduced into the reactor are not mixed sufficiently, and the liquid accumulates locally, resulting in incomplete reaction and a high phosgene content in the finished liquid. In addition, during the nitrogen degassed process, the nitrogen distribution is uneven, which cannot expel as much gas as possible from the finished liquid, and the required time is long. Utility Model Content

[0004] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes an isononanoyl chloride synthesis reactor with reasonable structural design, sufficient mixing of reactants, sufficient reaction, effective reduction of phosgene content in the reaction liquid, and reduction of the required degassing time.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An isononanoyl chloride synthesis reactor, comprising:

[0007] The vessel body has a temperature control jacket on its outer wall, a discharge port at the bottom, a feed port, an exhaust gas outlet, and an emergency vent at the top, and a stirring device inside.

[0008] A nitrogen input pipeline, comprising a nitrogen main pipe extending into the bottom of the vessel cavity at one end, and a nitrogen ring pipe disposed in the vessel cavity and communicating with the nitrogen main pipe; a plurality of nitrogen outlet holes are evenly distributed on the lower end face of the nitrogen ring pipe;

[0009] The isononanoic acid input pipeline is a sleeve structure, including an inner tube and an outer tube located outside the inner tube; one end of the isononanoic acid input pipeline extends into the inner cavity of the reactor body, and the outer tube is provided with an isononanoic acid inlet communicating with its inner cavity;

[0010] The phosgene input pipeline includes a phosgene main pipe extending into the bottom of the inner cavity of the vessel, and a phosgene ring pipe connected to the phosgene main pipe and disposed in the inner cavity of the vessel; a plurality of phosgene outlet holes are evenly distributed on the lower end face of the phosgene ring pipe; and a phosgene branch pipe connected to the inner cavity of the inner pipe is provided on the phosgene main pipe.

[0011] The reactor vessel, serving as the main container for the reaction, has a temperature-controlled jacket on its outer wall for precise temperature control. A discharge port at the bottom facilitates the removal of materials after the reaction. The top features a tail gas outlet and an emergency vent for discharging tail gas (which enters the tail gas emission device) and releasing excessive pressure in emergencies. An internal stirring device promotes mixing of the reactants. The isonononic acid inlet pipeline uses a sleeve structure; when phosgene is injected into the reactor, most of it enters through multiple phosgene outlets on the lower end face of the phosgene ring pipe, ensuring uniform and sufficient contact between the phosgene and the isonononic acid. To improve reaction efficiency, a portion of the phosgene is diverted to the inner tube of the casing. The pressure from the phosgene delivery cuts through the injected isononanoic acid, achieving a premixing effect and promoting uniform liquid distribution, thus optimizing phosgene distribution and reaction performance. The nitrogen inlet pipe extends to the bottom of the reactor cavity, and nitrogen is ejected from multiple nitrogen outlets on the lower end face of the nitrogen ring pipe. This allows the nitrogen to distribute evenly upwards from the bottom of the reactor, forming bubbles that help expel residual phosgene and other byproduct gases from the reaction solution, reducing the phosgene content and improving product quality.

[0012] Furthermore, the stirring device includes a stirring rod vertically disposed in the inner cavity of the vessel body and a stirring paddle disposed at the lower end of the stirring rod, which is controlled by a driving device.

[0013] Furthermore, there are two nitrogen ring pipes, located above and below the agitator respectively, both situated in the lower half of the vessel's internal cavity.

[0014] This layout allows nitrogen to form a more uniform distribution within the reactor, and, in conjunction with the stirring device, further improves the nitrogen removal effect, reducing the phosgene content in the final reaction liquid.

[0015] Furthermore, the inner tube is located on the portion of the vessel's internal cavity, and has multiple light gas outlets evenly distributed along its length.

[0016] The isonononic acid injected is cut using the pressure of phosgene, which serves as a premixing agent.

[0017] Furthermore, the lower end of the inner tube extends out from the outer tube, and the lower end of the inner tube is provided with a second phosgene ring tube, and the lower end face of the second phosgene ring tube has a plurality of phosgene outlet holes evenly distributed thereon; the inner diameter of the second phosgene ring tube is larger than the outer diameter of the outer tube.

[0018] The phosgene ring tube 2 configuration optimizes the distribution of phosgene without affecting the injection of isononanoic acid.

[0019] Furthermore, the phosgene annular tube is located below the agitator.

[0020] When used in conjunction with a stirring device, this arrangement allows phosgene to have better contact with isononanoic acid during the reaction process.

[0021] Furthermore, the phosgene annular tube is located below the agitator and between the two nitrogen annular tubes.

[0022] Compared with the prior art, the isononanoyl chloride synthesis reactor of this utility model has the following advantages:

[0023] (1) The isononanoic acid input pipeline in the isononanoyl chloride synthesis reactor of this utility model adopts a sleeve structure. When phosgene is injected into the reactor, most of the phosgene enters through multiple phosgene outlets on the lower end face of the phosgene ring pipe, so that the phosgene can be evenly and fully contacted with the isononanoic acid, thereby improving the reaction efficiency. At the same time, some of the phosgene is diverted to the inner tube of the sleeve, and the phosgene delivery pressure is used to cut the injected isononanoic acid, which plays a certain role in premixing. It can also play a role in uniformly separating the isononanoic acid. With the cooperation of the stirring device, the phosgene distribution is optimized, so that the reactants can be more fully mixed, improving the reaction efficiency, reducing phosgene residue and optimizing product quality.

[0024] (2) The isononanoyl chloride synthesis reactor described in this utility model can more effectively drive out the residual gas in the reaction liquid through the uniformly distributed nitrogen ring pipe, shorten the nitrogen purging time, and improve production efficiency. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0026] Figure 1 This is a schematic diagram of the isononanoyl chloride synthesis reactor described in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the isononanoic acid input pipeline and the phosgene input pipeline as described in this embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the nitrogen ring pipe described in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the phosgene annular tube described in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the phosgene annular tube II described in an embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Reservoir body, 2-Nitrogen input pipeline, 3-Isonononanoic acid input pipeline, 4-Phosgene input pipeline, 5-Temperature control jacket, 6-Discharge port, 7-Feeding port, 8-Tail gas outlet, 9-Emergency vent, 10-Stirring device, 11-Main nitrogen pipe, 12-Nitrogen loop pipe, 13-Nitrogen outlet, 14-Inner pipe, 15-Outer pipe, 16-Isonononanoic acid inlet, 17-Phosgene outlet, 18-Phosgene loop pipe II, 19-Main phosgene pipe, 20-Phosgene loop pipe, 21-Phosgene branch pipe. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] like Figures 1 to 5 As shown, an isononanoyl chloride synthesis reactor includes a reactor body 1, a nitrogen inlet pipeline 2, an isononanoic acid inlet pipeline 3, and a phosgene inlet pipeline 4;

[0038] The outer wall of the vessel body 1 is provided with a temperature control jacket 5, the bottom is provided with a discharge port 6, the top is provided with a feeding port 7, a tail gas outlet 8 and an emergency venting port 9, and the interior is provided with a stirring device 10; the stirring device 10 includes a stirring rod vertically arranged in the inner cavity of the vessel body 1 and a stirring paddle located at the lower end of the stirring rod, which is controlled by a driving device.

[0039] The nitrogen input pipeline 2 includes a nitrogen main pipe 11 with one end extending into the bottom of the inner cavity of the vessel body 1, and a nitrogen ring pipe 12 connected to the nitrogen main pipe 11 and located in the inner cavity of the vessel body 1; a plurality of nitrogen outlet holes 13 are evenly distributed on the lower end face of the nitrogen ring pipe 12; there are two nitrogen ring pipes 12, located above the stirring paddle and below the stirring paddle respectively, and both are located in the lower half of the inner cavity of the vessel body 1;

[0040] The isononanoic acid inlet pipe 3 has a sleeve structure, including an inner pipe 14 and an outer pipe 15 located outside the inner pipe 14. One end of the isononanoic acid inlet pipe 3 extends into the inner cavity of the vessel body 1, and the outer pipe 15 is provided with an isononanoic acid inlet 16 communicating with its inner cavity. The inner pipe 14 is located on the part of the inner cavity of the vessel body 1, and a plurality of phosgene outlet holes 17 are evenly distributed along its length. The lower end of the inner pipe 14 extends out of the outer pipe 15, and a second phosgene ring pipe 18 is provided at the lower end of the inner pipe 14. A plurality of phosgene outlet holes 17 are evenly distributed on the lower end face of the second phosgene ring pipe 18. The inner diameter of the second phosgene ring pipe 18 is larger than the outer diameter of the outer pipe 15.

[0041] The phosgene input pipeline 4 includes a phosgene main pipe 19 with one end extending into the bottom of the inner cavity of the vessel 1, and a phosgene ring pipe 20 connected to the phosgene main pipe 19 and located in the inner cavity of the vessel 1; a plurality of phosgene outlet holes 17 are evenly distributed on the lower end face of the phosgene ring pipe 20, and the phosgene ring pipe 20 is located below the agitator and between two nitrogen ring pipes 12; the phosgene main pipe 19 is provided with a phosgene branch pipe 21 connected to the inner cavity of the inner pipe 14.

[0042] The working process of the isononanoyl chloride synthesis reactor described in this utility model is as follows:

[0043] First, nitrogen gas is introduced into the reactor body 1 through nitrogen inlet pipe 2 to replace the air inside the reactor, ensuring an inert reaction environment and preventing phosgene from reacting with moisture or other impurities in the air. Isonononic acid enters the outer pipe 15 through isonononic acid inlet 16 and is then injected into the reactor body 1; most of the phosgene enters through the phosgene main pipe 19 via the phosgene ring pipe 20, with a portion diverted into the inner pipe 14, where the phosgene delivery pressure cuts the injected isonononic acid; the temperature control jacket 5 controls the reaction temperature at around 170℃, and simultaneously, under the stirring of the stirring device, the raw materials are thoroughly mixed and reacted.

[0044] When phosgene and the generated byproduct gases are expelled, nitrogen is continuously introduced into the reactor through the nitrogen ring pipe 12. The nitrogen is used to carry the residual phosgene and other byproduct gases out of the reactor body 1 and discharge them through the tail gas outlet 8, thereby reducing the phosgene content in the reaction liquid.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A synthetic reaction kettle for isononyl acid chloride, characterized in that, The utility model relates to a kind of isonitrosoacetone production device, including: Kettle body, the kettle body outer wall is equipped with temperature control jacket, bottom is equipped with discharge port, top is equipped with feeding port, tail gas outlet and emergency vent, inside is equipped with stirring device; Nitrogen input pipeline, the nitrogen input pipeline includes one end into the nitrogen main pipe of kettle body inner chamber bottom, with the nitrogen ring pipe of being equipped in the nitrogen main pipe communication kettle body inner chamber;Nitrogen ring pipe lower end face is evenly distributed with multiple nitrogen outlet holes; Isonitrosoacetate input pipeline, the isonitrosoacetate input pipeline is sleeve structure, including inner tube and being equipped in the outer tube of inner tube outer side;One end of the isonitrosoacetate input pipeline is into the kettle body inner chamber, and the outer tube is equipped with with its inner cavity communication isonitrosoacetate import; Phosgene input pipeline, the phosgene input pipeline includes one end into the phosgene main pipe of kettle body inner chamber bottom, with the phosgene ring pipe of being equipped in the phosgene main pipe communication kettle body inner chamber;Phosgene ring pipe lower end face is evenly distributed with multiple phosgene outlet holes;Phosgene main pipe is equipped with with the inner tube inner cavity communication phosgene branch pipe.

2. The isonitrosoacyl chloride synthesis reactor of claim 1, wherein: The stirring device includes by driving device control vertical setting in the kettle body inner chamber stirring rod and being equipped in the stirring rod lower end stirring paddle.

3. The isonitrosoacyl chloride synthesis reactor of claim 2, wherein: The nitrogen ring pipe has two, respectively located above the stirring paddle and below the stirring paddle and all be located in the lower half of the kettle body inner chamber.

4. The isonitroso acid chloride synthesis reactor of claim 1, wherein: The inner tube is located on the part of the kettle body inner chamber, and multiple phosgene outlet holes are distributed at equal intervals along the length direction thereof.

5. The isonitrosoacyl chloride synthesis reactor of claim 1, wherein: The lower end of the inner tube is stretched out from the outer tube, and the lower end of the inner tube is provided with a second phosgene ring pipe, the lower end surface of the second phosgene ring pipe is evenly distributed with multiple phosgene outlet holes;The inner diameter of the second phosgene ring pipe is greater than the outer diameter of the outer tube.

6. The isonitroso acid chloride synthesis reactor of claim 2, wherein: The phosgene ring pipe is located below the stirring paddle.

7. The isonitroso acid chloride synthesis reactor of claim 3, wherein: The phosgene ring pipe is located below the stirring paddle and between the two nitrogen ring pipes.

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