Continuous production device and method for phenyltrimethoxysilane

Abstract

The invention discloses a continuous production device and method for phenyltrimethoxysilane. The continuous production device comprises a first reactor, a second reactor, a demisting condenser, a multi-stage film evaporator and two electric rotating shaft assemblies, a raw material feeding assembly is mounted at one end of the first reactor; a methanol feeding assembly is mounted at one end of the second reactor, and the second reactor is communicated with the first reactor; the first reactor and the second reactor are both communicated with the demisting condenser; the multi-stage film evaporator is communicated with the discharge end of the second reactor, and a condensation assembly is mounted on the multi-stage film evaporator; the two electric rotating shaft assemblies are respectively mounted in the first reactor and the second reactor, and a plurality of methyl trichlorosilane scraper distributors and a plurality of methanol scraper distributors which are arranged in a staggered manner are mounted on the electric rotating shaft assemblies. According to the invention, continuous production of phenyltrimethoxysilane can be realized, the reaction speed, the reaction yield and the separation purity are improved, neutralization treatment is not needed, and the preparation efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of phenyltrimethoxysilane production, and in particular to a device and method for continuous production of phenyltrimethoxysilane. Background Art

[0002] Phenyl trimethoxysilane can be used as a crosslinking agent for silicone resins and as a raw material for phenyl silicone oils. It can improve the thermal stability of other silanes. It can be used to treat inorganic fillers such as wollastonite and aluminum hydroxide, making the surfaces of these inorganic fillers hydrophobic, thereby increasing their dispersibility in polymers. It is especially suitable for polymers that need to be processed at high temperatures to reduce the melt viscosity of polymers.

[0003] Phenyltrimethoxysilane can be obtained through alcoholysis, sodium condensation, and format method. The existing alcoholysis equipment is either a kettle reactor or a packed tower. The kettle esterification reaction is incomplete, requiring a large amount of neutralizer for neutralization, with many side reactions and high boiling points; the packed tower reactor is a convection reaction of steam alcohol and phenyltrichlorosilane in the tower, the by-product oligomer content is relatively large, and the yield is relatively low. In addition, the existing tower reaction has residual hydrogen chloride in the crude esterification product, and the pH value of the crude esterification product is 2 to 4 (acidic), which needs to be further neutralized with sodium methoxide.

[0004] To this end, a continuous production device and method for phenyltrimethoxysilane are proposed. Summary of the invention

[0005] The object of the present invention is to provide a continuous production device and method for phenyltrimethoxysilane, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides the following scheme: The present invention provides a continuous production device for phenyltrimethoxysilane, comprising:

[0007] A first reactor, wherein a raw material feeding assembly is installed at one end of the first reactor;

[0008] A second reactor, wherein a methanol feed assembly is installed at one end of the second reactor, and the second reactor is connected to the first reactor;

[0009] a demisting condenser, wherein the first reactor and the second reactor are both in communication with the demisting condenser;

[0010] a multi-stage thin film evaporator, the multi-stage thin film evaporator being connected to a discharge end of the second reactor, and the multi-stage thin film evaporator being provided with a condensation assembly;

[0011] Two electric shaft assemblies, the two electric shaft assemblies are respectively installed in the first reactor and the second reactor, and a plurality of methyltrichlorosilane scraper distributors and a plurality of methanol scraper distributors arranged in a staggered manner are installed on the electric shaft assemblies;

[0012] Among them, the raw material feeding assembly is used to add silane into the methyltrichlorosilane scraper distributor of the first reactor, and to add methanol into the methanol scraper distributor of the first reactor; the discharge end of the first reactor is connected to the methyltrichlorosilane scraper distributor of the second reactor, and the methanol feeding assembly is used to add methanol into the methanol scraper distributor of the second reactor.

[0013] According to a phenyltrimethoxysilane continuous production device provided by the present invention, the electric shaft assembly comprises:

[0014] Motors, the two motors are respectively mounted on the top walls of the first reactor and the second reactor;

[0015] A central shaft, the central shaft being mounted on the output shaft of the motor through a coupling; the two central shafts being rotatably connected in the inner cavities of the first reactor and the second reactor respectively;

[0016] A double-layer jacket, wherein the double-layer jacket is fixedly sleeved on the central axis, the inner layer of the double-layer jacket is communicated with a plurality of the methanol scraper distributors, and the outer layer of the double-layer jacket is connected with a plurality of the methyltrichlorosilane scraper distributors;

[0017] Among them, the raw material feeding assembly is used to add silane to the inner layer of the double-layer jacket of the first reactor, and to add methanol to the outer layer of the double-layer jacket of the first reactor; the methanol feeding assembly is used to add methanol to the outer layer of the double-layer jacket of the second reactor, and the discharge end of the first reactor is connected to the inner layer of the double-layer jacket of the second reactor through a pipeline.

[0018] According to a phenyltrimethoxysilane continuous production device provided by the present invention, the multi-stage thin film evaporator comprises a first thin film evaporator, a second thin film evaporator and a third thin film evaporator;

[0019] The first thin film evaporator is connected to the discharge end of the second reactor through a first pipeline, the second thin film evaporator is connected to the first thin film evaporator through a second pipeline, and the third thin film evaporator is connected to the second thin film evaporator through a third pipeline; the first pipeline, the second pipeline, and the third pipeline are respectively installed with a first feed pump, a second feed pump, and a third feed pump;

[0020] The condensation assembly includes a first condenser, a second condenser and a third condenser. The first condenser is communicated with the top of the first thin film evaporator, the second condenser is communicated with the top of the second thin film evaporator, and the third condenser is communicated with the top of the third thin film evaporator.

[0021] According to a continuous production device of phenyltrimethoxysilane provided by the present invention, the demister condenser includes a first demister, a second demister and a folded plate condenser; the first demister is connected to the top of the first reactor, the second demister is connected to the top of the second reactor, and the first demister and the second demister are both connected to the folded plate condenser.

[0022] According to a phenyltrimethoxysilane continuous production device provided by the present invention, the raw material feeding assembly comprises a first feeding pipe and a second feeding pipe, the first feeding pipe is equipped with a silane feeding pump, and the second feeding pipe is equipped with a first methanol feeding pump;

[0023] The methanol feed assembly comprises a third feed pipe, on which a second methanol feed pump is installed; the third feed pipe is in communication with the outer layer of the double-layer jacket of the second reactor;

[0024] The first feed pipe is communicated with the inner layer of the double-layer jacket of the first reactor, and the second feed pipe is communicated with the outer layer of the double-layer jacket of the first reactor.

[0025] According to a phenyltrimethoxysilane continuous production device provided by the present invention, the inner wall of the first reactor, the inner wall of the first reactor, the double-layer jacket, the methyltrichlorosilane scraper distributor and the methanol scraper distributor are all made of acid-alcohol corrosion-resistant materials.

[0026] According to a phenyltrimethoxysilane continuous production device provided by the present invention, the structures of the methyltrichlorosilane scraper distributor and the methanol scraper distributor are the same;

[0027] The methyltrichlorosilane scraper distributor comprises a support rod and a scraper, one end of the support rod is fixedly connected to the double-layer jacket, and the other end is fixedly connected to the scraper; the scraper is provided with a plurality of distribution holes, and the plurality of distribution holes are arranged at equal intervals;

[0028] The scraper of the methyltrichlorosilane scraper distributor is communicated with the inner layer of the double-layer jacket, and the scraper of the methanol scraper distributor is communicated with the outer layer of the double-layer jacket.

[0029] According to a continuous production device of phenyltrimethoxysilane provided by the present invention, the gas phase outlet of the folded plate condenser is connected to the exhaust gas treatment system, the condensate outlet of the folded plate condenser is connected to the fore-distillation storage tank, the fore-distillation storage tank is connected to the first reactor through a fourth pipeline, and a circulating pump is installed on the fourth pipeline.

[0030] The present invention also provides a method for continuous production of phenyltrimethoxysilane, comprising the following steps:

[0031] Step 1, adjusting the temperature of the second reactor to a set temperature;

[0032] Step 2: Open the raw material feeding assembly and the two electric rotating shaft assemblies;

[0033] Step 3: Phenyltrichlorosilane and methanol are fed into the first reactor at a molar ratio of 1:2 through the raw material feeding assembly; methanol and phenyltrichlorosilane react to produce a silane esterification intermediate which enters the second reactor; and hydrogen chloride produced in the first reactor enters the tail gas treatment system through the demisting condenser;

[0034] Step 4: The silane esterification intermediate and the methanol in the methanol feed assembly are fed into the second reactor in a molar ratio of 1:1.1, and the hydrogen chloride produced in the second reactor enters the tail gas treatment system through the demisting condenser;

[0035] Step 5, feeding the material in the second reactor into the first thin film evaporator of the multi-stage thin film evaporator, discharging methanol from the top, and discharging a small amount of methanol and phenyltrimethoxysilane from the kettle;

[0036] Step 6, putting the material in the first thin film evaporator into the second thin film evaporator, taking out methanol and phenyltrimethoxysilane, and taking out phenyltrimethoxysilane and high boiling point;

[0037] Step 7: put the material in the second thin film evaporator into the third thin film evaporator, remove the phenyltrimethoxysilane product, and remove a small amount of high boiling point.

[0038] According to a method for continuous production of phenyltrimethoxysilane provided by the present invention, in step one, the set temperature is 60° C.; in step five, the temperature in the first thin film evaporator is 100° C.

[0039] The present invention discloses the following technical effects:

[0040] The present invention adopts alcoholysis method to prepare and purify phenyltrichlorosilane by using phenyltrichlorosilane and methanol, and continuously produces phenyltrimethoxysilane by using a multi-stage thin film evaporator; the distillation speed of the distillation tower is improved, and no reflux is required during the distillation process, thereby saving energy;

[0041] The present invention drives a plurality of methyltrichlorosilane scraper distributors and a plurality of methanol scraper distributors to rotate through two electric rotating shaft components, so that the material distribution is more uniform; phenyltrichlorosilane and methanol form a thin film on the inner wall of the first reactor and the second reactor for reaction, and the generated hydrogen chloride can quickly overflow the thin film layer into the middle gap between the first reactor and the second reactor, and be drawn out from the upper part of the first reactor and the second reactor; on the one hand, the reaction speed is improved, and on the other hand, the generation of by-product oligomers is effectively reduced, the reaction oligomers are reduced, and the reaction yield and the separation purity of phenyltrimethoxysilane are improved;

[0042] The thin film reaction adopted by the present invention has the advantages that by-product hydrogen chloride is easy to remove, the pH value of the esterification crude product is 5-6, neutralization treatment with sodium methoxide and the like is not required, no neutralization solid waste is generated, and the preparation efficiency is high; the continuous production of phenyltrimethoxysilane solves the shortcomings of frequent operation of kettle-type intermittent reactors, complex production procedures, and non-continuous production; the equipment of the present invention is simple, the equipment failure rate is low, and the operation is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a structural schematic diagram of the present invention;

[0045] Figure 2 The structure of the first reactor in the present invention is shown in FIG. Figure Ⅰ ;

[0046] Figure 3 The structure of the first reactor in the present invention is shown in FIG. Figure II .

[0047] Among them, 1. silane feed pump; 2. first methanol feed pump; 3. second methanol feed pump; 4. first feed pump; 5. second feed pump; 6. third feed pump; 7. first demister; 8. second demister; 9. folding plate condenser; 10. fore-distillation storage tank; 11. first reactor; 12. second reactor; 13. first thin film evaporator; 14. second thin film evaporator; 15. third thin film evaporator; 16. first condenser; 17. second condenser; 18. third condenser; 24. methyltrichlorosilane scraper distributor; 25. methanol scraper distributor; 26. central axis; 27. inner layer; 28. outer layer; 29. ​​scraper. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Example 1

[0051] Reference Figure 1-Figure 3 The present invention provides a continuous production device for phenyltrimethoxysilane, comprising:

[0052] A first reactor 11, wherein a raw material feeding assembly is installed at one end of the first reactor 11;

[0053] A second reactor 12, one end of which is provided with a methanol feed assembly, and the second reactor 12 is connected to the first reactor 11;

[0054] A demisting condenser, wherein the first reactor 11 and the second reactor 12 are both connected to the demisting condenser;

[0055] A multi-stage thin film evaporator, the multi-stage thin film evaporator is connected to the discharge end of the second reactor 12, and a condensation component is installed on the multi-stage thin film evaporator;

[0056] Two electric shaft assemblies, the two electric shaft assemblies are respectively installed in the first reactor 11 and the second reactor 12, and a plurality of methyltrichlorosilane scraper distributors 24 and a plurality of methanol scraper distributors 25 arranged in a staggered manner are installed on the electric shaft assemblies; the plurality of methyltrichlorosilane scraper distributors 24 and the plurality of methanol scraper distributors 25 are distributed up and down, and the plurality of methyltrichlorosilane scraper distributors 24 and the plurality of methanol scraper distributors 25 rotate with the central axis 26 of the electric shaft assembly to perform a distribution operation;

[0057] The raw material feed assembly is used to add silane into the methyltrichlorosilane scraper distributor 24 of the first reactor 11, and to add methanol into the methanol scraper distributor 25 of the first reactor 11; the discharge end of the first reactor 11 is connected to the methyltrichlorosilane scraper distributor 24 of the second reactor 12, and the methanol feed assembly is used to add methanol into the methanol scraper distributor 25 of the second reactor 12;

[0058] In this way, the present invention adopts alcoholysis method to prepare and purify phenyltrichlorosilane by reacting phenyltrichlorosilane with methanol, and continuously produces phenyltrimethoxysilane by multi-stage thin film evaporator; the distillation speed of the distillation tower is improved, and no reflux is required during the distillation process, thus saving energy;

[0059] The present invention drives a plurality of methyltrichlorosilane scraper distributors 24 and a plurality of methanol scraper distributors 25 to rotate through two electric rotating shaft components, so that the material distribution is more uniform; phenyltrichlorosilane and methanol form a thin film on the inner wall of the first reactor 11 and the second reactor 12 for reaction, and the generated hydrogen chloride can quickly overflow the thin film layer into the middle gap between the first reactor 11 and the second reactor 12, and be extracted from the upper part of the first reactor 11 and the second reactor 12; on the one hand, the reaction speed is improved, and on the other hand, the generation of by-product oligomers is effectively reduced, and the reaction oligomers are reduced from 3-5% to less than 0.8%, and the reaction yield is increased from 88-90% to more than 98%, and the separation purity of phenyltrimethoxysilane is greater than 99.5%;

[0060] The thin film reaction adopted by the present invention has the advantages that by-product hydrogen chloride is easy to remove, the pH value of the esterification crude product is 5-6, neutralization treatment with sodium methoxide and the like is not required, no neutralization solid waste is generated, and the preparation efficiency is high; the continuous production of phenyltrimethoxysilane solves the shortcomings of frequent operation of kettle-type intermittent reactors, complex production procedures, and non-continuous production; the equipment of the present invention is simple, the equipment failure rate is low, and the operation is stable.

[0061] To further optimize the solution, the electric shaft assembly includes:

[0062] Motors, the two motors are respectively mounted on the top walls of the first reactor 11 and the second reactor 12;

[0063] The central shaft 26 is mounted on the output shaft of the motor through a coupling; the two central shafts 26 are rotatably connected in the inner cavities of the first reactor 11 and the second reactor 12 respectively;

[0064] A double-layer jacket, wherein the fixed sleeve of the double-layer jacket is arranged on the central shaft 26, the inner layer 27 of the double-layer jacket is connected to a plurality of methanol scraper distributors 25, and the outer layer 28 of the double-layer jacket is connected to a plurality of methyltrichlorosilane scraper distributors 24;

[0065] Among them, the raw material feeding assembly is used to add silane to the inner layer 27 of the double-layer jacket of the first reactor 11, and to add methanol to the outer layer 28 of the double-layer jacket of the first reactor 11; the methanol feeding assembly is used to add methanol to the outer layer 28 of the double-layer jacket of the second reactor 12, and the discharge end of the first reactor 11 is connected to the inner layer 27 of the double-layer jacket of the second reactor 12 through a pipeline.

[0066] According to a further optimized solution, the multi-stage thin film evaporator includes a first thin film evaporator 13, a second thin film evaporator 14 and a third thin film evaporator 15;

[0067] The first thin film evaporator 13 is connected to the discharge end of the second reactor 12 through a first pipeline, the second thin film evaporator 14 is connected to the first thin film evaporator 13 through a second pipeline, and the third thin film evaporator 15 is connected to the second thin film evaporator 14 through a third pipeline; the first pipeline, the second pipeline, and the third pipeline are respectively installed with a first feed pump 4, a second feed pump 5, and a third feed pump 6;

[0068] The condensation assembly includes a first condenser 16 , a second condenser 17 and a third condenser 18 . The first condenser 16 is connected to the top of the first thin film evaporator 13 , the second condenser 17 is connected to the top of the second thin film evaporator 14 , and the third condenser 18 is connected to the top of the third thin film evaporator 15 .

[0069] According to a further optimized solution, the demister condenser includes a first demister 7, a second demister 8 and a folded plate condenser 9; the first demister 7 is connected to the top of the first reactor 11, the second demister 8 is connected to the top of the second reactor 12, and both the first demister 7 and the second demister 8 are connected to the folded plate condenser 9.

[0070] Further optimizing the scheme, the raw material feeding assembly includes a first feeding pipe and a second feeding pipe, the first feeding pipe is equipped with a silane feeding pump 1, and the second feeding pipe is equipped with a first methanol feeding pump 2; the silane feeding pump 1 and the first methanol feeding pump 2 are respectively connected to the raw material tank to perform feeding operation;

[0071] The methanol feed assembly includes a third feed pipe, on which a second methanol feed pump 3 is installed; the third feed pipe is connected to the outer layer 28 of the double-layer jacket of the second reactor 12;

[0072] The first feed pipe is connected to the inner layer 27 of the double-layer jacket of the first reactor 11, and the second feed pipe is connected to the outer layer 28 of the double-layer jacket of the first reactor 11; the inner layer 27 and the outer layer 28 of the double-layer jacket are closed and connected to the feed ends of the first feed pipe and the second feed pipe through mechanical seals.

[0073] To further optimize the solution, the inner wall of the first reactor 11, the inner wall of the first reactor 11, the double jacket, the methyltrichlorosilane scraper distributor 24 and the methanol scraper distributor 25 are all made of acid and alcohol corrosion resistant materials;

[0074] The acid and alcohol corrosion resistant material is any one or more of enamel, plastic lining, and polytetrafluoroethylene;

[0075] By adopting acid and alcohol corrosion resistant materials, the parts in contact with the materials have good acid and alcohol corrosion resistance, thereby increasing the service life.

[0076] Further optimizing the scheme, the structures of the methyltrichlorosilane scraper distributor 24 and the methanol scraper distributor 25 are the same;

[0077] The methyltrichlorosilane scraper distributor 24 includes a support rod and a scraper 29, one end of the support rod is fixedly connected to the double-layer jacket, and the other end is fixedly connected to the scraper 29; the scraper 29 is provided with a plurality of distribution holes, and the plurality of distribution holes are arranged at equal intervals;

[0078] The scraper 29 of the methyltrichlorosilane scraper distributor 24 is communicated with the inner layer 27 of the double-layer jacket, and the scraper 29 of the methanol scraper distributor 25 is communicated with the outer layer 28 of the double-layer jacket.

[0079] To further optimize the solution, the gas phase outlet of the folded plate condenser 9 is connected to the exhaust gas treatment system, the condensate outlet of the folded plate condenser 9 is connected to the fore-distillation storage tank 10, the fore-distillation storage tank 10 is connected to the first reactor 11 through a fourth pipeline, and a circulating pump is installed on the fourth pipeline, through which the condensate of the folded plate condenser 9 is pumped back to the first reactor 11.

[0080] The present invention also provides a method for continuous production of phenyltrimethoxysilane, comprising the following steps:

[0081] Step 1, adjusting the temperature of the second reactor 12 to a set temperature;

[0082] Step 2: Open the raw material feeding assembly and the two electric rotating shaft assemblies;

[0083] Step 3: Phenyltrichlorosilane and methanol are fed into the first reactor 11 in a molar ratio of 1:2 through the raw material feeding assembly; methanol and phenyltrichlorosilane react to produce a silane esterification intermediate which enters the second reactor 12; and hydrogen chloride produced in the first reactor 11 enters the tail gas treatment system through the demisting condenser;

[0084] Step 4: The silane esterification intermediate and the methanol in the methanol feed assembly are fed into the second reactor 12 in a molar ratio of 1:1.1, and the hydrogen chloride produced in the second reactor 12 enters the tail gas treatment system through the demisting condenser;

[0085] Step 5, the material in the second reactor 12 is put into the first thin film evaporator 13 of the multi-stage thin film evaporator, the methanol is discharged from the top, and a small amount of methanol and phenyltrimethoxysilane are discharged from the kettle;

[0086] Step 6: Put the material in the first thin film evaporator 13 into the second thin film evaporator 14, remove the methanol and phenyltrimethoxysilane, and remove the phenyltrimethoxysilane and high boiling point;

[0087] Step 7: Put the material in the second thin film evaporator 14 into the third thin film evaporator 15, and take out the fine phenyltrimethoxysilane and a small amount of high boiling point.

[0088] To further optimize the solution, in step one, the temperature is set to 60°C; in step five, the pressure of the reaction process is -50Kpa, and the temperature in the first thin film evaporator 13 is 100°C.

[0089] In the present invention, the main reaction is: C6H5SiCl3+3CH3OH=C6H5Si(OCH3)3+3HCl

[0090] Side reaction: HCl + CH3OH = CH3Cl + H2O

[0091] Water further reacts with phenyltrimethoxysilane to form oligomers as byproducts.

[0092] The phenyltrimethoxysilane produced by the present invention has the structural formula:

[0093]

[0094] Example 2

[0095] The difference between this embodiment and embodiment 1 is that the ratio of silane to methanol in the first reactor 11 is 1:3, and the ratio of silane to methanol in the second reactor 12 is 1:0.2.

[0096] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0097] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technical users in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A continuous production device for phenyltrimethoxysilane, characterized in that: include: A first reactor (11), wherein a raw material feeding assembly is installed at one end of the first reactor (11); A second reactor (12), wherein a methanol feed assembly is installed at one end of the second reactor (12), and the second reactor (12) is connected to the first reactor (11); a demisting condenser, wherein the first reactor (11) and the second reactor (12) are both connected to the demisting condenser; a multi-stage thin film evaporator, the multi-stage thin film evaporator being in communication with a discharge end of the second reactor (12), the multi-stage thin film evaporator being provided with a condensation assembly; Two electric shaft assemblies, the two electric shaft assemblies being respectively installed in the first reactor (11) and the second reactor (12), and the electric shaft assemblies being installed with a plurality of methyltrichlorosilane scraper distributors (24) and a plurality of methanol scraper distributors (25) arranged in a staggered manner; The raw material feed assembly is used to add silane into the methyltrichlorosilane scraper distributor (24) of the first reactor (11), and to add methanol into the methanol scraper distributor (25) of the first reactor (11); the discharge end of the first reactor (11) is connected to the methyltrichlorosilane scraper distributor (24) of the second reactor (12), and the methanol feed assembly is used to add methanol into the methanol scraper distributor (25) of the second reactor (12).

2. The continuous production device of phenyltrimethoxysilane according to claim 1, characterized in that: The electric shaft assembly comprises: Motors, the two motors are respectively mounted on the top walls of the first reactor (11) and the second reactor (12); A central shaft (26), the central shaft (26) being mounted on the output shaft of the motor via a coupling; the two central shafts (26) being rotatably connected in the inner cavities of the first reactor (11) and the second reactor (12), respectively; A double-layer jacket, wherein the double-layer jacket is fixedly sleeved on the central shaft (26), the inner layer (27) of the double-layer jacket is connected to a plurality of the methanol scraper distributors (25), and the outer layer (28) of the double-layer jacket is connected to a plurality of the methyltrichlorosilane scraper distributors (24); The raw material feeding assembly is used to add silane to the inner layer (27) of the double-layer jacket of the first reactor (11), and to add methanol to the outer layer (28) of the double-layer jacket of the first reactor (11); the methanol feeding assembly is used to add methanol to the outer layer (28) of the double-layer jacket of the second reactor (12), and the discharge end of the first reactor (11) is connected to the inner layer (27) of the double-layer jacket of the second reactor (12) through a pipeline.

3. The continuous production device of phenyltrimethoxysilane according to claim 1, characterized in that: The multi-stage thin film evaporator comprises a first thin film evaporator (13), a second thin film evaporator (14) and a third thin film evaporator (15); The first thin film evaporator (13) is connected to the discharge end of the second reactor (12) through a first pipeline, the second thin film evaporator (14) is connected to the first thin film evaporator (13) through a second pipeline, and the third thin film evaporator (15) is connected to the second thin film evaporator (14) through a third pipeline; the first pipeline, the second pipeline, and the third pipeline are respectively installed with a first feed pump (4), a second feed pump (5), and a third feed pump (6); The condensation assembly comprises a first condenser (16), a second condenser (17) and a third condenser (18); the first condenser (16) is connected to the top of the first thin-film evaporator (13); the second condenser (17) is connected to the top of the second thin-film evaporator (14); and the third condenser (18) is connected to the top of the third thin-film evaporator (15).

4. The continuous production device of phenyltrimethoxysilane according to claim 1, characterized in that: The demisting condenser comprises a first demisting device (7), a second demisting device (8) and a folded plate condenser (9); the first demisting device (7) is connected to the top of the first reactor (11), the second demisting device (8) is connected to the top of the second reactor (12), and the first demisting device (7) and the second demisting device (8) are both connected to the folded plate condenser (9).

5. The continuous production device of phenyltrimethoxysilane according to claim 2, characterized in that: The raw material feed assembly comprises a first feed pipe and a second feed pipe, the first feed pipe is provided with a silane feed pump (1), and the second feed pipe is provided with a first methanol feed pump (2); The methanol feed assembly comprises a third feed pipe, on which a second methanol feed pump (3) is installed; the third feed pipe is connected to the outer layer (28) of the double-layer jacket of the second reactor (12); The first feed pipe is connected to the inner layer (27) of the double-layer jacket of the first reactor (11), and the second feed pipe is connected to the outer layer (28) of the double-layer jacket of the first reactor (11).

6. The continuous production device of phenyltrimethoxysilane according to claim 2, characterized in that: The inner wall of the first reactor (11), the inner wall of the first reactor (11), the double-layer jacket, the methyltrichlorosilane scraper distributor (24) and the methanol scraper distributor (25) are all made of acid-alcohol corrosion-resistant materials.

7. The continuous production device of phenyltrimethoxysilane according to claim 2, characterized in that: The methyltrichlorosilane scraper distributor (24) and the methanol scraper distributor (25) have the same structure; The methyltrichlorosilane scraper distributor (24) comprises a support rod and a scraper (29), one end of the support rod is fixedly connected to the double-layer jacket, and the other end is fixedly connected to the scraper (29); the scraper (29) is provided with a plurality of distribution holes, and the plurality of distribution holes are arranged at equal intervals; The scraper (29) of the methyltrichlorosilane scraper distributor (24) is in communication with the inner layer (27) of the double-layer jacket, and the scraper (29) of the methanol scraper distributor (25) is in communication with the outer layer (28) of the double-layer jacket.

8. The continuous production device of phenyltrimethoxysilane according to claim 4, characterized in that: The gas phase outlet of the folded plate condenser (9) is connected to the tail gas treatment system, and the condensate outlet of the folded plate condenser (9) is connected to the fore-distillation storage tank (10). The fore-distillation storage tank (10) is connected to the first reactor (11) via a fourth pipeline, and a circulation pump is installed on the fourth pipeline.

9. A method for continuous production of phenyltrimethoxysilane, based on the continuous production device of phenyltrimethoxysilane according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, adjusting the temperature of the second reactor (12) to a set temperature; Step 2: Open the raw material feeding assembly and the two electric rotating shaft assemblies; Step 3: Phenyltrichlorosilane and methanol are fed into the first reactor (11) at a molar ratio of 1:2 through a raw material feeding assembly; methanol and phenyltrichlorosilane react to produce a silane esterification intermediate which enters the second reactor (12); hydrogen chloride produced in the first reactor (11) enters the tail gas treatment system through a demisting condenser; Step 4: The silane esterification intermediate and the methanol in the methanol feed assembly are fed into the second reactor (12) at a molar ratio of 1:1.1, and the hydrogen chloride produced in the second reactor (12) enters the tail gas treatment system through the demisting condenser; Step 5, feeding the material in the second reactor (12) into the first thin film evaporator (13) of the multi-stage thin film evaporator, discharging methanol from the top, and discharging a small amount of methanol and phenyltrimethoxysilane from the kettle; Step 6, the material in the first thin film evaporator (13) is put into the second thin film evaporator (14), methanol and phenyltrimethoxysilane are discharged from the top, and phenyltrimethoxysilane and high boiling point are discharged from the kettle; Step 7: Put the material in the second thin film evaporator (14) into the third thin film evaporator (15), remove the phenyltrimethoxysilane product, and remove a small amount of high boiling point.

10. The method for continuous production of phenyltrimethoxysilane according to claim 9, characterized in that: In the step 1, the temperature is set to 60° C.; in the step 5, the temperature inside the first thin film evaporator (13) is 100° C.

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