Continuous sulfonation process and equipment for phenol in synthesis of bisphenol S

Abstract

The present application relates to the field of chemical synthesis, especially to a continuous sulfonation process and equipment of phenol in the synthesis process of bisphenol S, and solves the problem of low yield of bisphenol S. The present application provides a continuous sulfonation equipment of phenol in the synthesis process of bisphenol S, which comprises a mixing container, a transmission equipment and a reaction equipment. The phenol and concentrated sulfuric acid are premixed in the mixing container, and then the mixture is transmitted to the reaction equipment through the transmission equipment for reaction, so that the yield of bisphenol S produced by sulfonation reaction is higher.

Description

Technical Field

[0001] This invention belongs to the field of chemical synthesis, and more specifically, relates to a continuous sulfonation process and equipment for phenol in the synthesis of bisphenol S. Background Technology

[0002] Bisphenol S is a white needle-like crystal, chemically named 4,4'-dihydroxydiphenyl sulfone, abbreviated as BPS. It is readily soluble in alcohols, alkaline solutions, and hot water, and slightly soluble in cold water. Bisphenol S has excellent heat resistance, light resistance, and antioxidant properties, and is therefore frequently used as a chemical raw material, dispersant, accelerator, and combustion improver in the field of chemical synthesis. The synthesis of bisphenol S is obtained by...

[0003] In existing technologies, bisphenol S is synthesized by adding phenol and concentrated sulfuric acid together in a container and undergoing a sulfonation reaction at a corresponding temperature. However, this method results in insufficient mixing of phenol and concentrated sulfuric acid, leading to a low yield of bisphenol S. Furthermore, once the experiment begins, it is uncontrollable, and interrupting the reaction midway will result in the waste of raw materials. Additionally, local heating of the container may increase the number of isomers produced by the reaction. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous sulfonation device for phenol in the synthesis of bisphenol S. This device enables the integrated and continuous sulfonation of bisphenol S, featuring a rational structure and effective control over the feeding rate, mixing, temperature, and reaction extent, achieving safe reaction and high conversion or yield. Furthermore, another objective of this invention, based on this continuous sulfonation device, is to optimize a continuous sulfonation process.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The present invention discloses a continuous sulfonation device for phenol in the synthesis of bisphenol S, comprising a support part, a mixing container, a stirring device, a conveying device, a feeding device, and a reaction device. The mixing container is placed on the support part, and the stirring device and the feeding device are connected to the inside of the mixing container through the container opening. The conveying device is used to transfer the material inside the mixing container to the reaction device.

[0007] The transfer device includes an injection pump, a syringe, and a connecting tube. The syringe draws material from the mixing container, and the injection pump pushes the material inside the syringe through the connecting tube into the reaction device. The connecting tube is rotatably connected to the reaction device.

[0008] The reaction equipment includes an empty column reactor, a heating jacket, and a rotating disk. The heating jacket encloses the empty column reactor. The rotating disk includes a base, a rotary motor, and a rotating disc. The rotary motor is fixedly installed inside the base, and the motor shaft of the rotary motor is fixedly connected to the rotating disc. A square groove is opened on the rotating disc, and the side length of the square groove is equal to the side length of the heating jacket. The two are snapped together. As the rotary motor rotates, the rotating disc drives the empty column reactor to rotate.

[0009] The support component includes a support base, a support arm, a support plate, and a motor box. The support base has a spherical groove, and the mixing container is snapped into the spherical groove. The support plate is above the support base, and the two are fixedly connected by the support arm. The motor box is fixedly connected to the support plate, and the position of the motor box corresponds to the position of the container opening of the mixing container.

[0010] As a further improvement of the present invention, the mixing container has at least three openings, each with a corresponding stopper, and is detachably connected to the stirring device, the feeding device, and the conveying device.

[0011] As a further improvement of the present invention, the syringe includes an injection barrel and a piston rod, which are slidably connected; the injection barrel includes a barrel body, an injection port and a limiting plate, the injection port is fixedly connected to one end of the barrel body away from the piston rod and is connected to the reaction device through a connecting tube, and the limiting plate is fixedly connected to the other end of the barrel body; the piston rod includes a piston, a rod and a pressing plate, the piston and the pressing plate are fixedly connected to both sides of the rod, and the piston is slidably connected to the inner wall of the barrel body.

[0012] As a further improvement of the present invention, the injection pump includes a body, a lead screw motor, a lead screw, a nut, and a fixing rod; the body includes a base, a pump box, and a limiting platform, the pump box and the limiting platform being fixedly installed on the upper sides of the base respectively; the surface of the pump box near the lead screw has a first connecting hole and two positioning grooves on both sides, and the surface of the limiting platform near the lead screw has a second connecting hole and two positioning grooves on both sides; the first connecting hole and the second connecting hole are corresponding in position, and the first positioning groove and the second positioning groove are corresponding in position; the lead screw motor is fixedly installed inside the pump box, and the lead screw motor and the lead screw are fixedly connected inside the first connecting hole, and the lead screw motor and the lead screw are connected... The part is rotatably connected to the inner wall of the first connecting hole, and the side of the lead screw away from the lead screw motor is rotatably connected to the second connecting hole; the nut is internally connected to the lead screw thread, and there are through holes on both sides inside the nut. The through holes correspond to the positions of positioning groove one and positioning groove two. The fixing rod passes through both ends of the through holes and is tightly attached to the inside of positioning groove one and positioning groove two to fix the position of the nut and make the process of pushing the syringe more stable; a circular groove is provided on the side of the nut near the limiting platform. The circular groove has the same diameter as the pressing plate of the piston rod. The two are locked together to prevent the syringe from deviating; the piston rod is pushed by the nut moving along the lead screw axis.

[0013] As a further improvement of the present invention, the mixing device includes a mixing motor, a mixing rod, a connecting ring, and a mixing blade. One end of the mixing rod is fixedly connected to the mixing motor, and the other end is fixedly connected to the connecting ring. One end of the mixing blade has a through hole and is rotatably connected to the connecting ring. Under the action of gravity, the mixing blade is in a drooping state under normal conditions. In the drooping state, it can enter the container through the container opening of the mixing container. As the mixing motor works, the mixing blade is dispersed by centrifugal force to achieve the purpose of mixing materials.

[0014] As a further improvement of the present invention, the feeding device includes a feed inlet, a discharge outlet, a constant pressure tube, a grinding block, and a body. The feed inlet and discharge outlet are located on the upper and lower sides of the body. A through hole is opened in the middle of the discharge outlet and a through hole is opened in the middle of the grinding block. The grinding block is rotatably connected to the inner wall of the through hole of the discharge outlet. When the through hole of the grinding block is aligned with the discharge outlet, the purpose of dripping concentrated sulfuric acid is achieved. One end of the constant pressure tube is fixed above the connector body, and the other end is fixedly connected to the discharge outlet below the grinding block, ensuring that the pressure of the concentrated sulfuric acid liquid surface inside the body remains consistent.

[0015] As a further improvement of the present invention, the limiting platform includes an arc-shaped groove, a limiting groove, an ear seat, and a fixing ring. The arc-shaped groove is opened on the upper surface of the limiting platform for placing the syringe barrel. Ear seats are provided on both sides of the arc-shaped groove on the upper surface. The ear seats are rotatably connected to one end of the fixing ring. The other end of the fixing ring is provided with a fixing groove and a fixing step. The two fixing rings are engaged with the fixing step through the fixing groove. A limiting groove is opened near the nut on the limiting platform. The width of the limiting groove is equal to the width of the syringe limiting plate, thereby fixing the syringe on the limiting platform.

[0016] A continuous sulfonation process for phenol in the synthesis of bisphenol S includes the following steps:

[0017] S1. Place the mixing container inside the spherical groove of the support base, add phenol to the mixing container, and let the stirring device enter the mixing container through the bottle stopper. Turn on the stirring motor to stir the phenol and cool the inside of the mixing container.

[0018] S2. The discharge port of the feeding equipment is detachably connected to the mixing container through a bottle stopper. Concentrated sulfuric acid is added into the feeding equipment from the inlet. The concentrated sulfuric acid is then evenly dripped into the mixing container from the discharge port through a constant pressure tube to mix with phenol.

[0019] S3. After the addition is complete, the temperature is raised naturally to dissolve all the phenol, resulting in a pink to light red transparent sulfonated premixed solution;

[0020] S4. Use a syringe to draw the sulfonated premixed liquid from the mixing container, then place the syringe in the arc-shaped groove on the injection pump, place the limiting plate in the limiting groove, press the pressure plate against the nut, and further fix the syringe position with the retaining ring; the injection port is connected to the empty column reactor through the connecting tube;

[0021] S5. Turn on the lead screw motor to move the nut horizontally along the lead screw, thereby pushing the pressing plate and injecting the premixed liquid inside the syringe into the empty column reactor through the connecting tube.

[0022] S6. The premixed liquid inside the empty column reactor is heated by the heating jacket. The rotary table drives the empty column reactor to rotate as the rotary motor is turned on, so that the premixed liquid inside the empty column reactor is heated evenly, reducing the yield of isomers in the sulfonation reaction.

[0023] S7. Receive the sulfonated liquid obtained from the above sulfonation reaction.

[0024] Compared to existing technologies, the advantages of this invention are as follows: By setting up a mixing container to premix phenol and concentrated sulfuric acid, the contact between phenol and concentrated sulfuric acid can be more thorough, increasing the yield of bisphenol S in the sulfonation reaction; by setting up an injection pump and syringe as transfer devices, the premixed liquid can be injected into the reactor at a set rate, controlling the degree of reaction and preventing the reaction from being too violent; by setting up a rotary table to control the rotation of the heating jacket surrounding the empty column reactor, the premixed liquid inside the empty column reactor is heated more evenly, preventing local overheating and reducing the generation of isomers; by setting up a feeding device with a constant pressure tube to drop concentrated sulfuric acid into the mixing container, the dropping process is more uniform and the air pressure inside the feeding device will not decrease as the dropping progresses, thus preventing the dropping from being blocked; by setting up a stirring device to stir the phenol inside the mixing container, the temperature can be cooled down when the temperature rises after the concentrated sulfuric acid is added, and the phenol and concentrated sulfuric acid can be mixed more evenly. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the premixing operation structure of the mixing container of the present invention;

[0026] Figure 2 This is a schematic diagram of the transmission device and reaction device of the present invention;

[0027] Figure 3 This is a schematic diagram of a half-section of the reaction equipment of the present invention;

[0028] Figure 4 This is a schematic diagram of the supporting structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the mixing container structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the syringe structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the injection pump structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the stirring device structure of the present invention;

[0033] Figure 9 This is a partially enlarged structural diagram of part A of the stirring device of the present invention;

[0034] Figure 10 This is a schematic diagram of the feeding device structure of the present invention;

[0035] Figure 11 This is a schematic diagram of the pump housing, nut, and limiting platform structure of the present invention (from left to right: pump housing, nut, and limiting platform).

[0036] Explanation of the labels in the diagram:

[0037] 1. Supporting part, 11. Support base, 111. Spherical groove, 12. Support arm, 13. Support plate, 14. Motor box, 2. Mixing container, 21. Container opening, 22. Bottle stopper, 3. Stirring equipment, 31. Stirring motor, 32. Stirring rod, 33. Connecting ring, 34. Stirring blade, 4. Transmission equipment, 41. Injection pump, 411. Body, 4111. Base, 4112. Pump housing, 41121. Connecting hole one, 41122. Positioning groove one, 4113. Limiting platform, 41131. Connecting hole two, 41132. Positioning groove two, 41133. Arc groove, 41134. Limiting groove, 41135. Ear seat, 41136. Fixing ring, 4 1136A Fixed step, 41136B Fixed groove, 412 Lead screw motor, 413 Lead screw, 414 Nut, 415 Fixed rod, 42 Injector, 421 Injection cylinder, 4211 Cylinder body, 4212 Injection port, 4213 Limiting plate, 422 Piston rod, 4221 Piston, 4222 Rod, 4223 Pressing plate, 43 Connecting pipe, 5 Feeding equipment, 51 Inlet, 52 Outlet, 53 Constant pressure pipe, 54 Grinding block, 55 Body, 6 Reaction equipment, 61 Empty column reactor, 62 Heating jacket, 63 Rotary disc, 631 Chassis, 632 Rotary motor, 633 Rotary disk. Detailed Implementation

[0038] Specific Implementation Example 1: Please refer to... Figure 1-11 A continuous sulfonation device for phenol in the synthesis of bisphenol S includes a support part 1, a mixing container 2, a stirring device 3, a conveying device 4, a feeding device 5, and a reaction device 6. The mixing container 2 is placed on the support part 1. The stirring device 3 and the feeding device 5 are connected to the inside of the mixing container 2 through the container port 21. The conveying device 4 is used to transfer the sulfonation premix inside the mixing container 2 to the reaction device 6.

[0039] The transmission device 4 includes an injection pump 41, a syringe 42, and a connecting tube 43. The syringe 42 draws sulfonated premixed liquid from the mixing container 2, and the injection pump 41 pushes the sulfonated premixed liquid inside the syringe 42 through the connecting tube 43 into the reaction device 6. The connecting tube 43 is rotatably connected to the reaction device 6.

[0040] like Figure 3 The reaction apparatus 6 shown includes an empty column reactor 61, a heating jacket 62, and a rotary disk 63. The heating jacket 62 encloses the empty column reactor 61. The rotary disk 63 includes a base 631, a rotary motor 632, and a rotating disc 633. The rotary motor 632 is fixedly installed inside the base 631, and the motor shaft of the rotary motor 632 is fixedly connected to the rotating disc 633. A square groove is opened on the rotating disc 633, and the side length of the square groove is equal to the side length of the heating jacket 62. The two are snapped together. As the rotary motor 632 rotates, the rotating disc 633 drives the empty column reactor 61 to rotate.

[0041] like Figure 4 The support part 1 shown includes a support base 11, a support arm 12, a support plate 13, and a motor box 14. The support base 11 has a spherical groove 111, and the mixing container 2 is snapped into the spherical groove 111. The support plate 13 is above the support base 11, and the two are fixedly connected by the support arm 12. The motor box 14 is fixedly connected to the support plate 13, and the position of the motor box 14 corresponds to the position of the container opening 21 of the mixing container 2.

[0042] Specifically, such as Figure 5 The mixing container 2 shown has at least three openings 21, and each opening 21 is fitted with a stopper 22. The mixing container 2 is detachably connected to the stirring device 3, the feeding device 5, and the conveying device 4 at the stopper 22.

[0043] Specifically, such as Figure 6 The syringe 42 shown includes a syringe barrel 421 and a piston rod 422, which are slidably connected. The syringe barrel 421 includes a barrel body 4211, an injection port 4212, and a limiting plate 4213. The injection port 4212 is fixedly connected to one end of the barrel body 4211 away from the piston rod 422 and is connected to the reaction device 6 through a connecting pipe 43. The limiting plate 4213 is fixedly connected to the other end of the barrel body 4211. The piston rod 422 includes a piston 4221, a rod 4222, and a pressing plate 4223. The piston 4221 and the pressing plate 4223 are fixedly connected to both sides of the rod 4222, and the piston 4221 is slidably connected to the inner wall of the barrel body 4211.

[0044] Specifically, such as Figure 7 and Figure 11The injection pump 41 shown includes a body 411, a lead screw motor 412, a lead screw 413, a nut 414, and a fixing rod 415. The body 411 includes a base 4111, a pump housing 4112, and a limiting platform 4113. The pump housing 4112 and the limiting platform 4113 are respectively fixedly installed on both sides above the base 4111. The surface of the pump housing 4112 near the lead screw 413 has a connecting hole 41121 and positioning grooves 41122 on both sides. The limiting platform 411... 3. A second connection hole 41131 and two positioning grooves 41132 are opened on one side near the lead screw 413. The positions of the first connection hole 41121 and the second connection hole 41122 correspond, and the positions of the first positioning groove 41122 and the second positioning groove 41132 correspond. The lead screw motor 412 is fixedly installed inside the pump box 4112. The lead screw motor 412 and the lead screw 413 are fixedly connected inside the first connection hole 41121. The connection part of the lead screw motor 412 and the lead screw 413 The screw 413 is rotatably connected to the inner wall of the first connecting hole 41121, and the side of the screw 413 away from the screw motor 412 is rotatably connected to the second connecting hole 41131. The nut 414 is threadedly connected to the screw 413. The nut 414 has through holes on both sides inside, which correspond to the positions of the first positioning groove 41122 and the second positioning groove 41132. The fixing rod 415 passes through the two ends of the through holes and is tightly attached to the inside of the first positioning groove 41122 and the second positioning groove 41132 to fix the position of the nut 414 and make the process of pushing the syringe 42 more stable. The side of the nut 414 near the limiting platform 4113 has a circular groove with the same diameter as the pressing plate 4223 of the piston rod 422. The two are engaged to prevent the syringe 42 from deviating. The relative rotational motion between the nut 414 and the screw 413 is converted into linear motion of the nut 414 along the axis of the screw 413, which pushes the piston rod 422, thereby discharging concentrated sulfuric acid.

[0045] Specifically, such as Figure 8-9 The mixing device 3 shown includes a mixing motor 31, a mixing rod 32, a connecting ring 33, and mixing blades 34. One end of the mixing rod 32 is fixedly connected to the mixing motor 31, and the other end is fixedly connected to the connecting ring 33. One end of the mixing blade 34 has a through hole and is rotatably connected to the connecting ring 33. There are multiple mixing blades 34, which are evenly distributed on the connecting ring 33. Under the influence of gravity, the mixing blades 34 are in a drooping state under normal conditions. The drooping state allows the mixing device 3 to enter the interior through the container opening 21 of the mixing container 2. As the mixing motor 31 works, the mixing blades 34 are dispersed by centrifugal force, which can not only make the material evenly mixed, but also achieve the purpose of cooling by stirring the phenol.

[0046] Specifically, such as Figure 10The feeding device 5 shown includes an inlet 51, a discharge port 52, a constant pressure tube 53, a grinding block 54, and a body 55. The inlet 51 and the discharge port 52 are located on the upper and lower sides of the body 55. The discharge port 52 has a through hole in the middle, and the grinding block 54 has a through hole in the middle. The outer wall of the grinding block 54 is rotatably connected to the inner wall of the through hole of the discharge port 52. When the through hole of the grinding block 54 is aligned with the discharge port 52, feeding begins to achieve the purpose of dripping concentrated sulfuric acid. One end of the constant pressure tube 53 is fixedly connected to the upper part of the body 55, and the other end is fixedly connected to the discharge port 52 below the grinding block 54. This ensures that the pressure of the concentrated sulfuric acid liquid surface inside the body 55 remains consistent, which can not only ensure that the dripping speed of concentrated sulfuric acid remains uniform, but also prevent backflow.

[0047] Specifically, such as Figure 11 The limiting platform 4113 shown also includes an arc-shaped groove 41133, a limiting groove 41134, an ear seat 41135, and a fixing ring 41136. The arc-shaped groove 41133 is opened on the upper surface of the limiting platform 4113 and is used to place the syringe barrel 421 of the syringe 42. The ear seats 41135 are provided on both sides of the arc-shaped groove 41133 on the upper surface. The ear seats 41135 are rotatably connected to one end of the fixing ring 41136. The other end of the fixing ring 41136 is provided with a fixing groove 41136B and a fixing step 41136A. The two fixing rings 41136 are connected to the fixing step 41136A through the fixing groove 41136B. The limiting platform 4113 has a limiting groove 41134 near the nut 414. The width of the limiting groove 41134 is equal to the width of the limiting plate 4213 of the syringe 42, so that the syringe 42 is fixed on the limiting platform 4113.

[0048] Specifically, each time the syringe 42 draws up the sulfonated premixed solution, it is injected into the reaction device through the injection pump 41. The reaction process is more precise, and the reaction can be adjusted at any time by adjusting the injection pump 41.

[0049] A continuous sulfonation process for phenol in the synthesis of bisphenol S includes the following steps:

[0050] S1. Place the mixing container 2 inside the spherical groove 111 of the support base 11, add phenol inside the mixing container 2, and the stirring device 3 enters the mixing container 2 through the bottle stopper 22. Turn on the stirring motor 31 to make the stirring blade 34 stir the phenol and stir and cool the inside of the mixing container 2.

[0051] S2. The discharge port 52 of the feeding device 5 is detachably connected to the mixing container 2 through the bottle stopper 22. Concentrated sulfuric acid is added into the feeding device 5 from the inlet 51. The concentrated sulfuric acid is evenly dripped into the mixing container 2 from the discharge port 52 through the constant pressure tube 53 and mixed with phenol.

[0052] S3. After the addition is complete, the temperature is raised naturally to dissolve all the phenol, resulting in a pink to light red transparent sulfonated premixed solution;

[0053] S4. Use syringe 42 to draw the sulfonated premixed liquid from the mixing container 2, then place syringe 42 in the arc groove 41133 position on the injection pump 41, place the limiting plate 4213 in the limiting groove 41134 position, press plate 4223 tightly against nut 414 position, and further fix the position of syringe 42 by fixing ring 41136; injection port 4212 is connected to empty column reactor 61 through connecting pipe 43;

[0054] S5. Turn on the lead screw motor 412, so that the nut 414 moves horizontally along the lead screw 413, thereby pushing the pressing plate 4223, so that the premixed liquid inside the syringe 42 is injected into the empty column reactor 61 through the connecting tube 43;

[0055] S6. The premixed liquid inside the empty column reactor 61 is heated by the heating jacket 62. The rotary table 63 drives the empty column reactor 61 to rotate as the rotary motor 632 is turned on, so that the premixed liquid inside the empty column reactor 61 is heated evenly, reducing the yield of isomers in the sulfonation reaction.

[0056] S7. Receive the sulfonated liquid obtained from the above sulfonation reaction.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous sulfonation process of phenol in a bisphenol S synthesis process, characterized in that: The continuous sulfonating device used in the process comprises a supporting part (1), a mixing container (2), a stirring device (3), a conveying device (4), a feeding device (5) and a reaction device (6), the mixing container (2) is placed on the supporting part (1), the stirring device (3) and the feeding device (5) are connected to the inside of the mixing container (2) through a container port (21), and the conveying device (4) is used for conveying the material in the mixing container (2) to the reaction device (6); The conveying device (4) comprises a syringe pump (41), a syringe (42) and a connecting pipe (43), the syringe (42) sucks the material in the mixing container (2), and the syringe pump (41) pushes the material in the syringe (42) to be injected into the reaction device through the connecting pipe (43); The syringe pump (41) comprises a machine body (411), a lead screw motor (412), a lead screw (413), a nut (414) and a fixed rod (415); the machine body (411) comprises a base (4111), a pump box (4112) and a limiting table (4113); the nut (414) is threadedly connected with the lead screw (413) in the inside, a circular groove is arranged on one side of the nut (414) close to the limiting table (4113), the diameter of the circular groove is equal to that of a pressing plate (4223) of a piston core rod (422), and the two are clampedly connected; The limiting table (4113) further comprises an arc-shaped groove (41133), a limiting groove (41134), an ear seat (41135) and a fixing ring (41136); the limiting groove (41134) is formed in the position of the limiting table (4113) close to the nut (414), and the width of the limiting groove (41134) is equal to the width of a limiting plate (4213) of the syringe (42); The syringe (42) comprises a syringe barrel (421) and the piston core rod (422), and the two are slidably connected; the syringe barrel (421) comprises a barrel body (4211), a syringe port (4212) and the limiting plate (4213); The reaction device (6) comprises an empty column reactor (61), a heating jacket (62) and a rotary disc (63), the heating jacket (62) wraps the empty column reactor (61), and the rotary disc (63) is detachably connected with the heating jacket (62); the rotary disc (63) comprises a bottom disc (631), a rotary motor (632) and a rotating disc (633); The supporting part (1) comprises a supporting seat (11), a supporting arm (12), a supporting plate (13) and a motor box (14), a spherical groove (111) is formed in the supporting seat (11), the mixing container (2) is clamped in the spherical groove (111), the supporting plate (13) is above the supporting seat (11), the two are fixedly connected through the supporting arm (12), and the motor box (14) is fixedly connected to the supporting plate (13); The continuous sulfonating process of phenol in the synthesis process of bisphenol S comprises the following steps: S1. Put the mixing container (2) inside the spherical groove (111) of the support seat (11), add phenol inside the mixing container (2), the stirring device (3) enters the inside of the mixing container (2) through the bottle plug (22), start the stirring motor (31), and make the stirring blade (34) stir the phenol to stir and cool the inside of the mixing container (2); S2. The discharge port (52) of the feeding device (5) is detachably connected with the mixing container (2) through the bottle plug (22), concentrated sulfuric acid is added into the feeding device (5) from the feeding port (51), and the concentrated sulfuric acid is uniformly dropped into the mixing container (2) from the discharge port (52) through the constant pressure pipe (53) and mixed with the phenol; S3. After the dropping is completed, the phenol is completely dissolved, and a pink to light red transparent sulfonated premix is obtained; S4. The sulfonated premix in the mixing container (2) is sucked by the syringe (42), then the syringe (42) is placed at the arc-shaped groove (41133) position on the injection pump (41), the limiting plate (4213) is placed at the limiting groove (41134) position, the pressing plate (4223) is tightly attached to the nut (414) position, and the position of the syringe (42) is further fixed through the fixing ring (41136); and the injection port (4212) is communicated with the empty column reactor (61) through the connecting pipe (43); S5. Start the lead screw motor (412), so that the nut (414) moves horizontally along the lead screw (413) to push the pressing plate (4223), so that the premix in the syringe (42) is injected into the empty column reactor (61) through the connecting pipe (43); S6. The premix in the empty column reactor (61) is heated by the heating jacket (62), and the rotation disc (63) drives the empty column reactor (61) to rotate with the start of the rotation motor (632), so that the premix in the empty column reactor (61) is uniformly heated, and the yield of isomers in the sulfonation reaction is reduced; S7. Receive the sulfonated liquid obtained by the above sulfonation reaction.

2. A continuous process for the sulphonation of phenol in the synthesis of bisphenol S as claimed in claim 1, wherein: The container port (21) of the mixing container (2) is at least three, the bottle plug (22) is installed corresponding to the container port (21), and is detachably connected with the stirring device (3), the feeding device (5) and the transmission device (4).

3. A continuous process for the sulfonation of phenol in the synthesis of bisphenol S as claimed in claim 1, wherein the process is characterized by: The injection port (4212) is fixedly connected to one end of the barrel body (4211) away from the piston core rod (422), is connected with the reaction device (6) through the connecting pipe (43), and the limiting plate (4213) is fixedly connected to the other end of the barrel body (4211); the piston core rod (422) comprises a piston (4221), a core rod (4222) and a pressing plate (4223), the piston (4221) and the pressing plate (4223) are fixedly connected with the core rod (4222) on both sides, and the piston (4221) is slidably connected with the inner wall of the barrel body (4211).

4. A continuous sulfonation process of phenol in the synthesis of bisphenol S as claimed in claim 1, wherein: The pump box (4112) and the limiting table (4113) are respectively fixedly installed on the two sides above the base (4111), the pump box (4112) is provided with a connecting hole one (41121) and a positioning groove one (41122) on the surface of the side close to the lead screw (413), the limiting table (4113) is provided with a connecting hole two (41131) and a positioning groove two (41132) on the surface of the side close to the lead screw (413), the connecting hole one (41121) and the connecting hole two (41131) are in position correspondence; the lead screw motor (412) is fixedly installed in the pump box (4112), the lead screw motor (412) is fixedly connected with the lead screw (413) in the connecting hole one (41121), the connecting part of the lead screw motor (412) and the lead screw (413) is rotatably connected with the inner wall of the connecting hole one (41121), and the side, away from the lead screw motor (412), of the lead screw (413) is rotatably connected with the connecting hole two (41131).

5. A continuous process for the sulfonation of phenol in the synthesis of bisphenol S as claimed in claim 1, wherein the process is characterized by: The stirring device (3) comprises a stirring motor (31), a stirring rod (32), a connecting ring (33) and stirring blades (34), one end of the stirring rod (32) is fixedly connected with the stirring motor (31), the other end is fixedly connected with the connecting ring (33), and the stirring blades (34) are rotatably connected with the connecting ring (33) through the through holes in one end of the stirring blades (34).

6. A continuous sulfonation process of phenol in the synthesis of bisphenol S as claimed in claim 1, wherein: The feeding device (5) comprises an inlet (51), a discharge port (52), a constant pressure pipe (53), a sanding block (54) and a body (55), the inlet (51) and the discharge port (52) are located on the upper and lower sides of the body (55), the discharge port (52) is provided with a through hole in the middle, the sanding block (54) is provided with a through hole in the middle, the sanding block (54) is rotatably connected with the inner wall of the through hole of the discharge port (52), one end of the constant pressure pipe (53) is fixedly connected with the upper side of the body (55), and the other end is fixedly connected with the discharge port (52) below the sanding block (54).

7. A continuous process for the sulfonation of phenol in the synthesis of bisphenol S as claimed in claim 4, wherein the process is characterized by: The arc-shaped groove (41133) is arranged on the upper surface of the limiting table (4113) and used for placing the injection barrel (421) of the syringe (42); the ear seats (41135) are arranged on the two sides of the arc-shaped groove (41133) on the upper surface, the ear seats (41135) are rotatably connected with one end of the fixing rings (41136), the other end of the fixing rings (41136) is provided with a fixing groove (41136B) and a fixing step (41136A), and the two fixing rings (41136) are connected through the clamping connection of the fixing groove (41136B) and the fixing step (41136A).

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