An apparatus for the phase transfer catalytic synthesis of mercaptopropyltrimethoxysilane

Abstract

The application provides a device for synthesizing mercaptopropyl trimethoxysilane through phase transfer catalysis, which comprises a reaction kettle provided with a raw material filling port on a top surface, a storage tank provided with a control valve at a discharge port, and a raw material filling device connected between the reaction kettle and the storage tank. The raw material filling device comprises a track housing, a feeding section, a chain conveying module arranged on opposite inner walls of the track housing, a feeding tank, a rack mechanism and a gear mechanism. The raw material filling device for conveying solid powder materials is arranged between the storage tank and the reaction kettle, the feeding tank is conveyed to the vicinity of the raw material filling port by the chain conveying module, the feeding tank is turned over through the gear and rack mechanism, and the solid materials are filled into the reaction kettle, so that the problems of low efficiency and low accuracy caused by manual control of a metering device for filling raw materials in the raw material pretreatment stage of mercaptopropyl trimethoxysilane synthesis are solved.

Description

Technical Field

[0001] This invention relates to the technical field of catalytic synthesis of mercaptopropyltrimethoxysilane, and more particularly to an apparatus for phase transfer catalytic synthesis of mercaptopropyltrimethoxysilane. Background Technology

[0002] Phase transfer refers to the process in a chemical reaction where reactants or reactive intermediates are transferred from one phase (such as an aqueous or solid phase) to another phase (such as an organic phase) through a catalyst or specific conditions. This process is mainly applied to heterogeneous reaction systems (such as liquid-liquid and liquid-solid systems) to address problems such as low reaction efficiency and poor selectivity caused by differences in the solubility of substances. Phase transfer technology significantly improves reaction rates and yields by promoting mass transfer between different phases.

[0003] In the synthesis of mercaptopropyltrimethoxysilane, phase transfer catalysis significantly improves the efficiency of the nucleophilic substitution reaction between sodium hydrosulfide (NaHS) and chloropropyltrimethoxysilane by promoting cross-phase transfer of substances in a heterogeneous reaction system.

[0004] In the pretreatment stage of raw materials, it is necessary to control the dropping rate of the raw materials to avoid excessive local concentrations that could lead to side reactions.

[0005] However, in existing technologies, the addition of raw materials is often carried out by manually controlling the metering device, which is inefficient and not very accurate. Utility Model Content

[0006] The purpose of this invention is to solve the problem in the prior art that the manual control of the metering device for adding raw materials in the raw material pretreatment stage of the synthesis of mercaptopropyltrimethoxysilane is inefficient and inaccurate.

[0007] To achieve the above objectives, this application proposes an apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane, comprising: A reaction vessel with a raw material filling port on its top surface; A storage tank equipped with a control valve at the discharge port; A raw material filling device connecting the reactor and the storage tank; the raw material filling device includes: a track housing connecting the discharge port at the bottom of the storage tank and the raw material filling port; the track housing includes: a feeding section covering the raw material filling port; a chain conveying module disposed on two opposite inner walls of the track housing; a conveying tank disposed between the chain conveying modules; a rack and pinion mechanism disposed on the inner wall of the bottom surface of the feeding section near the raw material filling port; and a gear mechanism disposed on the side wall of the conveying tank and capable of meshing with the rack and pinion mechanism.

[0008] This application provides a raw material feeding device for conveying solid powder materials between the storage tank and the reactor. The feeding tank is driven by a chain conveyor module to be transported to the vicinity of the raw material feeding port. The feeding tank is flipped by a gear and rack mechanism to feed the solid material into the reactor. This solves the problem in the prior art that the feeding of raw materials in the raw material pretreatment stage of mercaptopropyltrimethoxysilane synthesis is inefficient and inaccurate due to the need for manual control of the metering device.

[0009] Furthermore, in order to realize the segmented structure of the track shell, the track shell also includes: a feeding section disposed below the raw material filling port and the discharge port; and a conveying section connecting the feeding section and extending to the raw material filling port.

[0010] Furthermore, in order to enable the chain conveyor to transport materials along the conveying path, the chain conveying module includes: a sprocket disposed at a corner inside the housing; a chain assembly meshing with the sprocket; and a motor whose output shaft is connected to the sprocket.

[0011] Furthermore, in order to limit the conveying path of the chain, guide plates are provided at the overlapping parts of the feeding section, the conveying section and the feeding section.

[0012] Furthermore, in order to prevent raw materials from accumulating at the top of the feeding section and to ensure that the raw materials enter the track housing smoothly, a linear groove is provided at the top of the feeding section near the bottom outlet of the storage tank.

[0013] Furthermore, in order to precisely control the unloading speed and amount of raw materials from the storage tank, a rotary unloading valve is installed at the bottom of the storage tank.

[0014] Furthermore, in order to prevent the storage tank from tipping over during transportation and causing the raw materials to spill out, and to ensure the stability of the raw material transportation, a counterweight is provided at the bottom of the storage tank so that the opening of the storage tank always faces upwards in its natural state.

[0015] Furthermore, in order to enable the storage tank to rotate 360 ​​degrees around the pin as the rotation axis, so as to facilitate the adjustment of the posture of the storage tank during the conveying process and ensure smooth delivery of raw materials, the storage tank is provided with pins and fixing blocks connected to the chain conveying module on opposite side walls. The fixing blocks are provided with holes that are clearance-fitted with the pins, so that the storage tank can rotate 360 ​​degrees around the pins as the rotation axis.

[0016] Furthermore, in order to make the connection between the storage tank and the chain conveyor module more secure and to ensure the stability of the conveying process, the fixing block is welded to a single chain segment of the chain conveyor module.

[0017] Furthermore, in order to guide the raw material falling from the raw material filling port to be evenly dispersed in the reactor, an inclined guide section is provided on the side wall of the reactor near the top surface. The inclined guide section gradually expands outward from the side wall of the reactor towards the top surface, and the raw material filling port is directly below the inclined guide section at the same vertical position.

[0018] The beneficial effects of this application are as follows: 1. This application provides a raw material feeding device for conveying solid powder materials between the storage tank and the reactor. The feeding tank is transported to the vicinity of the raw material feeding port by a chain conveyor module. The feeding tank is flipped by a gear and rack mechanism to feed the solid material into the reactor. This solves the problem in the prior art that the feeding of raw materials in the raw material pretreatment stage of mercaptopropyltrimethoxysilane synthesis is inefficient and inaccurate due to the need for manual control of the metering device.

[0019] 2. This application provides a counterweight at the bottom of the conveying tank to prevent the storage tank from tipping over during conveying and causing the raw materials to spill out, thus ensuring the stability of the raw material conveying. On the other hand, it enables the conveying pipe to automatically reset after the material is delivered.

[0020] 3. This application provides an inclined guide section on the side wall near the top of the reactor, which can guide the raw material falling from the raw material filling port to be evenly dispersed in the reactor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the apparatus for the phase transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to an embodiment of this application; Figure 2 for Figure 1 Enlarged view of point a in the middle; Figure 3 This is a schematic diagram of the structure of the storage tank in an embodiment of this application; Figure 4 This is a partial cross-sectional view of a phase transfer catalytic synthesis of mercaptopropyltrimethoxysilane in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures: 1. Reactor; 11. Raw material filling port; 12. Sloping guide section; 2. Storage tank; 21. Control valve; 3. Raw material filling device; 31. Track housing; 311. Feeding section; 3111. Linear trough; 312. Conveying section; 313. Feeding section; 32. Chain conveyor module; 321. Sprocket; 322. Chain; 323. Motor; 324. Guide plate; 33. Conveying tank; 331. Pin; 332. Fixing block; 333. Counterweight; 34. Rack and pinion mechanism; 35. Gear mechanism. Detailed Implementation

[0024] The following will be combined with the appendix Figures 1-4 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1: like Figures 1-4 This illustration depicts an apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to this application. In this apparatus, a raw material feeding device 3 connects the reactor 1 and the storage tank 2 to facilitate raw material transport. The raw material feeding device 3 includes a track housing 31, which is composed of a feed section 311, a conveying section 312, and a feeding section 313 connected sequentially. The feed section 311 is located below the outlet of the raw material feeding port 11. The conveying section 312 connects to the feed section 311 and extends to the raw material feeding port 11. The feeding section 313 connects to the conveying section 312 and covers the raw material feeding port 11. Chain conveyor modules 32 are arranged on opposite side walls of the track housing 31, and a conveying tank 33 is placed between the chain conveyor modules 32.

[0026] In actual operation, storage tank 2 stores raw materials to be conveyed, and the discharge of raw materials is controlled by control valve 21 at the discharge port of storage tank 2. Storage tank 2 is connected to the feeding section 311 of track housing 31 through control valve 21. The linear groove 3111 at the top of the feeding section 311 can accommodate the powdered raw materials fed from the discharge port at the bottom of storage tank 2. After the raw materials flow out of the discharge port of storage tank 2, they enter the feeding section 311 of track housing 31. The chain conveyor module 32 operates continuously, driving the conveying tank 33 to move along track housing 31. Driven by the chain conveyor module 32, the conveying tank 33 moves from the feeding section 311 to the conveying section 312, and then moves towards the feeding section 313 until it reaches the feeding section 313. This method of using a chain conveyor module 32 to drive the conveying tank 33 to transport raw materials achieves automated conveying of raw materials from the storage tank 2 to the raw material filling port 11 of the reactor 1, avoiding the need for manual control of the metering device for raw material filling and greatly improving the efficiency of raw material conveying.

[0027] Meanwhile, to precisely control the unloading speed and amount of raw materials from storage tank 2, a rotary discharge valve is installed at the bottom of storage tank 2. Although not explicitly labeled in the attached diagram, it is described as a component of storage tank 2 and is included for completeness. By adjusting the rotation speed and opening of the rotary discharge valve, the speed and amount of raw materials flowing out of storage tank 2 can be precisely controlled according to actual production needs. This avoids side reactions caused by excessively high local concentrations due to improper raw material dripping speed, thus improving the accuracy of raw material dispensing.

[0028] Example 2: like Figures 1-4 This illustration depicts an apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to this application. To prevent the storage tank 2 from tipping over during transport and causing raw material spillage, and to ensure the stability of the raw material transport, a counterweight 21 is installed at the bottom of the storage tank 2. The counterweight 21 ensures that the opening of the storage tank 2 always faces upwards in its natural state. When the chain conveyor module 32 moves the conveying tank 33 (i.e., the storage tank 2) within the raw material filling device 3, the counterweight 21 provides stability. Even if the apparatus experiences some shaking during operation, the storage tank 2 maintains its upward-facing opening, preventing raw material spillage due to tipping over and ensuring the stability of the raw material transport process.

[0029] Furthermore, to enable the storage tank 2 to rotate 360 ​​degrees around the pivot pin 331, facilitating posture adjustment during transport and ensuring smooth material delivery, pivot pins 331 and fixing blocks 23 are installed on opposite side walls of the storage tank 2, connecting to the chain conveyor module 32. The fixing blocks 23 have holes that fit with the pivot pins 331 with clearance. This allows the storage tank 2 to rotate 360 ​​degrees around the pivot pin 331, automatically adjusting its posture during transport to prevent improper posture from affecting material delivery. Simultaneously, to ensure a more secure connection between the storage tank 2 and the chain conveyor module 32 and guarantee transport stability, the fixing blocks 23 are welded to a single chain segment of the chain conveyor module 32, enhancing the connection's stability and preventing the storage tank 2 from detaching during transport.

[0030] Example 3: like Figures 1-4This illustration depicts an apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to this application. To guide the raw material falling from the feed inlet 11 and uniformly disperse it within the reactor 1, an inclined guide section 12 is provided on the side wall of the reactor 1 near the top. This inclined guide section 12 gradually expands outward from the side wall of the reactor 1 towards the top, and is located at the same vertical position as the feed inlet 11. When the raw material falls from the feed inlet 11, it first lands on the inclined guide section 12. Due to the inclined angle of the inclined guide section 12, the raw material is dispersed along the inclined guide section 12 in various directions within the reactor 1, preventing local accumulation of the raw material within the reactor 1 and allowing for a more uniform distribution of the raw material within the reactor 1, thus providing favorable conditions for the subsequent phase-transfer catalytic synthesis reaction.

[0031] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0032] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane, characterized in that, include: A reactor (1) with a raw material filling port (11) on its top surface; A storage tank (2) with a control valve (21) installed at the discharge port; A raw material feeding device (3) connecting the reactor (1) and the storage tank (2); the raw material feeding device (3) includes: a track shell (31) connecting the discharge port at the bottom of the storage tank (2) and the raw material feeding port (11); the track shell (31) includes: a feeding section (313) covering the raw material feeding port (11); a chain conveying module (32) disposed on the two opposite inner walls of the track shell (31); a conveying tank (33) placed between the chain conveying modules (32); a rack mechanism (34) disposed on the inner wall of the bottom surface of the feeding section (313) near the raw material feeding port (11); and a gear mechanism (35) disposed on the side wall of the conveying tank (33) and capable of meshing with the rack mechanism (34).

2. The apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 1, characterized in that, The track housing (31) further includes: a feeding section (311) disposed below the discharge port of the raw material filling port (11); and a conveying section (312) connecting the feeding section (311) and extending to the raw material filling port (11).

3. The apparatus for the phase transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 1, characterized in that, The chain conveying module (32) includes: a sprocket (321) disposed at a corner inside the housing (31); a chain assembly (322) meshing with the sprocket (321); and a motor (323) whose output shaft is connected to the sprocket (321).

4. The apparatus for the phase transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 2, characterized in that, Guide plates (324) are provided at the overlapping parts of the feeding section (311), the conveying section (312) and the feeding section (313).

5. The apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 2, characterized in that, The feed section (311) has a linear groove (3111) at the top of the discharge port near the bottom of the storage tank (2).

6. The apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 1, characterized in that, The bottom of the conveying tank (33) is provided with a counterweight (333) so that the opening of the conveying tank (33) always faces upward in its natural state.

7. The apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 1, characterized in that, The material conveying tank (33) is provided with pins (331) and fixing blocks (332) on opposite side walls, which are connected to the chain conveying module (32). The fixing blocks (332) have holes that are clearance-fitted with the pins (331), so that the material conveying tank (33) can rotate 360 ​​degrees around the pins (331) as the rotation axis.

8. The apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 7, characterized in that, The fixing block (332) is welded to a single chain segment of the chain conveying module (32).

9. The apparatus for the phase-transfer catalytic synthesis of mercaptopropyltrimethoxysilane according to claim 1, characterized in that, The reactor (1) has a sloping guide section (12) on the side wall near the top surface. The sloping guide section (12) gradually expands outward from the side wall of the reactor (1) towards the top surface, and the raw material filling port (11) is directly below the sloping guide section (12) at the same vertical position.

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