CN217568387U - Low hydrogen-containing silicone oil production system - Google Patents
Low hydrogen-containing silicone oil production system Download PDFInfo
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- CN217568387U CN217568387U CN202221563193.8U CN202221563193U CN217568387U CN 217568387 U CN217568387 U CN 217568387U CN 202221563193 U CN202221563193 U CN 202221563193U CN 217568387 U CN217568387 U CN 217568387U
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Abstract
The application provides a low hydrogen silicone oil production system relates to the silicone oil field, solves at present low hydrogen silicone oil's preparation in-process, and the resin catalyst can receive mechanical damage, and then leads to the higher problem of low hydrogen silicone oil manufacturing cost. The system comprises a batching kettle, a fixed bed reactor and a crude product tank; wherein the batching kettle has an outlet, the fixed bed reactor has an inlet and an outlet, and the crude product tank has an inlet; the outlet of the batching kettle is communicated with the inlet of the fixed bed reactor, and the outlet of the fixed bed reactor is communicated with the inlet of the crude product tank; and a catalyst bed layer is arranged in the fixed bed reactor, and resin catalyst solid particles are filled in the catalyst bed layer.
Description
Technical Field
The application relates to the field of silicone oil, in particular to a low-hydrogen-containing silicone oil production system.
Background
The low hydrogen-containing silicone oil (generally, the hydrogen-containing silicone oil with the hydrogen content of not more than 1.55% can be called as the low hydrogen-containing silicone oil) is modified silicone oil with stronger activity, can react with various groups, and is commonly used as a dry powder moisture-proof treatment agent of a waterproof agent, a cross-linking agent, a modifying agent, an anti-yellowing agent, a dry powder fire extinguishing agent and the like.
At present, the preparation method of the low hydrogen-containing silicone oil is generally as follows: adding the preparation raw materials and a resin catalyst into a reaction kettle, stirring for catalytic reaction to obtain a crude product of the low-hydrogen silicone oil, and further purifying the crude product to obtain the low-hydrogen silicone oil.
However, in the above preparation process, the resin catalyst is mechanically damaged by the stirring process in the reaction kettle, so that the catalytic activity is reduced, the service life of the catalyst is shortened, the catalyst needs to be frequently replaced, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
The application provides a low hydrogen silicone oil production system can be used for solving present low hydrogen silicone oil's preparation in-process, and the resin catalyst can receive mechanical damage, and then leads to the higher technical problem of low hydrogen silicone oil manufacturing cost.
The embodiment of the application provides a low hydrogen-containing silicone oil production system, which comprises a batching kettle, a fixed bed reactor and a crude product tank;
wherein the batching kettle has an outlet, the fixed bed reactor has an inlet and an outlet, and the crude product tank has an inlet;
the outlet of the batching kettle is communicated with the inlet of the fixed bed reactor, and the outlet of the fixed bed reactor is communicated with the inlet of the crude product tank;
and a catalyst bed layer is arranged in the fixed bed reactor, and resin catalyst solid particles are filled in the catalyst bed layer.
Optionally, in an embodiment, a first supporting layer and a second supporting layer are further disposed in the fixed bed reactor;
the first support layer is arranged on a first surface of the catalyst bed layer, and the first surface is the surface of the catalyst bed layer facing the bottom of the fixed bed reactor;
the second support layer is arranged on a second surface of the catalyst bed layer, and the second surface is a surface of the catalyst bed layer facing the top of the fixed bed reactor.
Optionally, in one embodiment, the first support layer and the second support layer are both filter screens.
Alternatively, in one embodiment, the pore size of the filter screen is smaller than the size of the solid particles of the resin catalyst.
Optionally, in one embodiment, the first support layer extends from the bottom of the fixed bed reactor to the first surface of the catalyst bed layer, the first support layer being filled with a plurality of glass beads;
the second support layer extends from the second surface of the catalyst bed to the top of the fixed bed reactor, the second support layer being filled with a plurality of glass beads.
Alternatively, in one embodiment, the size of the voids between the plurality of glass beads filled with the first support layer is smaller than the size of the solid particles of the resin catalyst;
the size of the gaps among the plurality of glass beads filled with the second support layer is smaller than the size of the solid particles of the resin catalyst.
Optionally, in one embodiment, the size of the plurality of glass beads filled in the first support layer is larger than the size of the solid particles of the resin catalyst;
the size of the plurality of glass beads filled in the second support layer is larger than that of the solid particles of the resin catalyst.
Optionally, in one embodiment, the system further comprises a tundish;
the intermediate tank has an inlet and an outlet;
the outlet of the batching kettle is communicated with the inlet of the intermediate tank, and the outlet of the intermediate tank is communicated with the inlet of the fixed bed reactor.
Optionally, in one embodiment, the system further comprises a first filtration device;
the first filter device has an inlet and an outlet;
the outlet of the intermediate tank is communicated with the inlet of a first filtering device, and the outlet of the first filtering device is communicated with the inlet of the fixed bed reactor.
Optionally, in one embodiment, the system further comprises a second filtration unit, a depravation column, a third filtration unit, and a product tank;
the second filtration device has an inlet and an outlet, the lower knockout column has an inlet and an outlet, the third filtration device has an inlet and an outlet, the product tank has an inlet, and the crude tank also has an outlet;
an outlet of the fixed bed reactor is communicated with an inlet of the second filtering device, and an outlet of the second filtering device is communicated with an inlet of the crude product tank;
an outlet of the crude product tank is communicated with an inlet of the low-boiling tower, and an outlet of the low-boiling tower is communicated with an inlet of the third filtering device;
the outlet of the third filter device is communicated with the inlet of the product tank.
The beneficial effect that this application brought is as follows:
according to the low hydrogen-containing silicone oil production system provided by the embodiment of the application, the system comprises a batching kettle, a fixed bed reactor and a crude product tank; wherein the batching kettle has an outlet, the fixed bed reactor has an inlet and an outlet, and the crude product tank has an inlet; the outlet of the batching kettle is communicated with the inlet of the fixed bed reactor, and the outlet of the fixed bed reactor is communicated with the inlet of the crude product tank; a catalyst bed layer is arranged in the fixed bed reactor, and resin catalyst solid particles are filled in the catalyst bed layer; based on low hydrogen silicone oil production system that this application embodiment provided, the production process of low hydrogen silicone oil production does: and (3) introducing the preparation raw material of the low hydrogen-containing silicone oil into the fixed bed reactor from the batching kettle, allowing the preparation raw material to flow through a catalyst bed layer arranged in the fixed bed reactor, and contacting with resin catalyst solid particles filled in the catalyst bed layer to realize catalytic reaction, thus obtaining the low hydrogen-containing silicone oil crude product. In the catalytic reaction process, mechanical stirring is not needed, so that the resin catalyst can be prevented from being mechanically damaged, the catalytic activity can be ensured, the service life of the catalyst is prolonged, the catalyst does not need to be frequently replaced, and the production cost of the low-hydrogen silicone oil can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. In the drawings:
FIG. 1 is a schematic structural diagram of a low hydrogen-containing silicone oil production system provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another low hydrogen-containing silicone oil production system provided in the embodiments of the present application;
FIG. 3 is a schematic structural diagram of another low hydrogen-containing silicone oil production system provided in the embodiments of the present application;
fig. 4 is a schematic structural diagram of another low hydrogen-containing silicone oil production system provided in an embodiment of the present application.
Reference numerals:
10-low hydrogen silicone oil production system; 101-a batching kettle; 102-fixed bed reactor; 1021-a catalyst bed; 1022 — a first support layer; 1023 — a second support layer; 103-crude product tank; 104-intermediate tank; 105-a first filtering means; 106 — a second filtration device; 107-lower removing tower; 108-a third filtration device; 109-product tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As described in the above background art, in the current process of preparing low hydrogen silicone oil, the resin catalyst is mechanically damaged by the stirring process in the reaction kettle, so that the structure of the resin catalyst is damaged, the catalytic activity is reduced, the service life of the catalyst is shortened, the catalyst needs to be replaced frequently, and the production cost is high.
Based on this, the embodiment of the present application provides a low hydrogen-containing silicone oil production system 10, which is used to solve the technical problem that in the existing preparation process of low hydrogen-containing silicone oil, a resin catalyst is mechanically damaged, and thus the production cost of the low hydrogen-containing silicone oil is high. As shown in fig. 1, the low hydrogen-containing silicone oil production system 10 includes a batching kettle 101, a fixed bed reactor 102 and a crude product tank 103; the batching kettle 101 has an outlet, the fixed bed reactor 102 has an inlet and an outlet, and the crude tank 103 has an inlet; an outlet of the batching kettle 101 is communicated with an inlet of the fixed bed reactor 102, and an outlet of the fixed bed reactor 102 is communicated with an inlet of the crude product tank 103; a catalyst bed layer 1021 is arranged in the fixed bed reactor 102, and resin catalyst solid particles are filled in the catalyst bed layer 1021.
In the embodiment of the present application, the batching kettle 101 can be used for mixing the preparation raw material of low hydrogen-containing silicone oil. Specifically, the preparation raw materials may include octamethylcyclotetrasiloxane, hexamethyldisiloxane, and high hydrogen silicone oil, which are added to the compounding kettle 101 to be mixed. Wherein, the hydrogen content of the high hydrogen-containing silicone oil can be 1.55 to 2 percent, and the mass ratio of the octamethylcyclotetrasiloxane to the high hydrogen-containing silicone oil can be 0.5:1 to 15:1, the addition amount of hexamethyldisiloxane may be 0.3% to 2.5% of the total mass of the above-mentioned raw materials for preparation. In practical application, in order to further facilitate the mixing of the preparation raw materials of the low hydrogen-containing silicone oil by the batching kettle 101, a stirring device a can be arranged on the batching kettle 101.
The fixed bed reactor 102 may be used to provide a corresponding space for the contact between the preparation raw material and the resin catalyst, in other words, the fixed bed reactor 102 may be used as a container for the catalytic reaction between the preparation raw material and the resin catalyst. After the preparation materials in the batching kettle 101 are mixed, the preparation materials may be introduced into the fixed bed reactor 102 to contact the resin catalyst in the catalyst bed 1021 of the fixed bed reactor 102. In order to ensure the catalytic effect, a heating device may be further disposed on the fixed bed reactor 102, so that the catalyst bed 1021 in the fixed bed reactor 102 may be maintained at a temperature corresponding to the catalytic reaction.
In the present embodiment, the catalyst bed 1021 is filled with solid resin catalyst particles, and it can also be understood that the catalyst bed 1021 is formed by stacking solid resin catalyst particles with gaps therebetween, and the solid resin catalyst particles can pass through the preparation material fluid. The catalyst bed 1021 may be disposed in a middle portion of the fixed bed reactor 102, and the catalyst bed 1021 is fixedly disposed in the fixed bed reactor 102, and the catalyst bed 1021 remains stationary while the preparation feedstock flows through the catalyst bed 1021.
The crude tank 103 may be used to store a crude low hydrogen silicone oil product. When the raw material flows through the catalyst bed 1021, the raw material contacts with the resin catalyst therein, and catalytic reaction occurs in the catalyst bed 1021 to obtain a crude product of the low hydrogen-containing silicone oil. Further, the obtained crude product of the low hydrogen-containing silicone oil can be led out from the fixed bed reactor 102 and flows into a crude tank 103 for storage. In practical applications, in order to facilitate the export of the low hydrogen-containing silicone oil crude product stored in the crude product tank 103 for further purification, the crude product tank 103 may further have an outlet.
In the present embodiment, the communication may be through a pipe. Meanwhile, in order to convey materials smoothly and quickly, a conveying pump B can be arranged on the pipeline according to actual conditions, and the provided drawings can be referred specifically. In addition, in order to facilitate the control of the flow velocity and the flow rate in the pipeline, a corresponding valve can be further arranged on the pipeline, and the subsequent description is omitted.
It can be understood that, with the low hydrogen-containing silicone oil production system 10 provided in the above embodiment of the present application, the system 10 includes a batching kettle 101, a fixed bed reactor 102 and a crude product tank 103; the batching kettle 101 has an outlet, the fixed bed reactor 102 has an inlet and an outlet, and the crude tank 103 has an inlet; an outlet of the batching kettle 101 is communicated with an inlet of the fixed bed reactor 102, and an outlet of the fixed bed reactor 102 is communicated with an inlet of the crude product tank 103; a catalyst bed layer 1021 is arranged in the fixed bed reactor 102, and resin catalyst solid particles are filled in the catalyst bed layer 1021; furthermore, the production process of the low hydrogen-containing silicone oil can be as follows: the raw material for preparing the low hydrogen-containing silicone oil is introduced into the fixed bed reactor 102 from the batching kettle 101, flows through the catalyst bed layer 1021 arranged in the fixed bed reactor 102, and contacts with the resin catalyst solid particles filled in the catalyst bed layer 1021 to realize catalytic reaction, and then the low hydrogen-containing silicone oil crude product can be prepared. In the catalytic reaction process, mechanical stirring is not needed, so that the resin catalyst can be prevented from being mechanically damaged, the catalytic activity can be ensured, the service life of the catalyst is prolonged, and the catalyst does not need to be frequently replaced, so that the production cost of the low-hydrogen silicone oil can be reduced.
On the other hand, as described in the above background art, a reaction kettle is often used to prepare low hydrogen-containing silicone oil, so that the production process of low hydrogen-containing silicone oil is a batch process, and the production efficiency of low hydrogen-containing silicone oil is low. By the low hydrogen-containing silicone oil production system 10 provided by the embodiment of the application, the preparation raw material flows through the catalyst bed layer 1021 arranged in the fixed bed reactor 102, and contacts with the resin catalyst solid particles filled in the catalyst bed layer 1021, so that a catalytic reaction can be performed, and the low hydrogen-containing silicone oil can be continuously produced. That is, based on the low hydrogen-containing silicone oil production system 10 provided in the embodiment of the present application, it is possible to realize continuous production of low hydrogen-containing silicone oil, and thus it is possible to improve the production efficiency of low hydrogen-containing silicone oil.
In addition, in the conventional process for preparing the low hydrogen-containing silicone oil, the resin catalyst is mechanically damaged in the stirring process in the reaction kettle, and further fine particles of the resin catalyst are generated, and the fine particles are mixed in the crude product of the low hydrogen-containing silicone oil, so that the filtration is difficult, and the quality of the low hydrogen-containing silicone oil is easily reduced. Through the low hydrogen-containing silicone oil production system 10 provided by the embodiment of the application, in the catalytic reaction process, mechanical stirring is not required, the resin catalyst can be prevented from being mechanically damaged, the generation of fine particles of the resin catalyst can be reduced, the fine particles in the crude product of the low hydrogen-containing silicone oil can be effectively reduced, and therefore the quality of the low hydrogen-containing silicone oil can be improved.
In practical applications, in order to stably fix the catalyst bed 1021 in the fixed bed reactor 102, as shown in fig. 2, in one embodiment, a first supporting layer 1022 and a second supporting layer 1023 are further disposed in the fixed bed reactor 102; the first support layer 1022 is disposed on a first surface of the catalyst bed 1021, where the first surface is a surface of the catalyst bed 1021 facing the bottom of the fixed bed reactor 102; the second support layer 1023 is disposed on a second surface of the catalyst bed 1021, which is a surface of the catalyst bed 1021 facing the top of the fixed bed reactor 102.
The first support layer 1022 and the second support layer 1023 are used to support the catalyst bed 1021, so as to fix the catalyst bed 1021 in the fixed bed reactor 102, for example, in the middle of the fixed bed reactor 102.
In the present embodiment, the first support layer 1022 and the second support layer 1023 each have pores that allow the preparation material to pass through.
Further, in one embodiment, the first and second support layers 1022 and 1023 are filter screens.
When the first support layer 1022 and the second support layer 1023 are both filter meshes, in order to further prevent solid particles of the resin catalyst from coming off the catalyst bed 1021 and from being mixed into the raw product of the low hydrogen-containing silicone oil, the size of pores of the filter meshes is smaller than the size of the solid particles of the resin catalyst, in other words, the size of pores of the filter meshes is a size that does not allow the solid particles of the resin catalyst to pass through. Specifically, if the resin catalyst solid particles are regarded as spheres, the pore diameter of the filter net is smaller than the diameter of the resin catalyst solid particles. Thus, after the low hydrogen-containing silicone oil crude product is obtained through the catalytic reaction, the solid particles of the resin catalyst can be prevented from leaving the catalyst bed 1021 along with the low hydrogen-containing silicone oil crude product, so that the solid particles of the resin catalyst can be prevented from being mixed into the low hydrogen-containing silicone oil crude product.
In another embodiment, as shown in fig. 3, the first support layer 1022 extends from the bottom of the fixed bed reactor 102 to the first surface of the catalyst bed 1021, and the first support layer 1022 is filled with a plurality of glass beads; the second support layer 1023 extends from the second surface of the catalyst bed 1021 to the top of the fixed bed reactor 102, and the second support layer 1023 is filled with a plurality of glass beads.
Wherein the first support layer 1022 is filled with a plurality of glass beads, it can be understood that the first support layer 1022 is formed by stacking glass beads. Specifically, a plurality of glass beads are stacked from the bottom of the fixed bed reactor 102 to the first surface of the catalyst bed 1021, forming the first support layer 1022.
The second support layer 1023 is filled with a plurality of glass beads, and it is understood that the second support layer 1023 is formed by a stack of glass beads. Specifically, a plurality of glass beads are stacked from the second surface of the catalyst bed 1021 to the top of the fixed bed reactor 102, forming a second support layer 1023.
When the first support layer 1022 and the second support layer 1023 are formed by stacking glass beads, in order to further prevent the resin catalyst solid particles from separating from the catalyst bed 1021 and mixing into the low hydrogen-containing silicone oil crude product, the size of the gaps between the plurality of glass beads filled in the first support layer 1022 is smaller than the size of the resin catalyst solid particles, and the size of the gaps between the plurality of glass beads filled in the second support layer 1023 is smaller than the size of the resin catalyst solid particles. In other words, the size of the gaps between the plurality of glass beads filled by the first support layer 1022 is a size that does not allow the solid particles of the resin catalyst to pass through, and the size of the gaps between the plurality of glass beads filled by the second support layer 1023 is a size that does not allow the solid particles of the resin catalyst to pass through. Thus, after the low hydrogen-containing silicone oil crude product is obtained through the catalytic reaction, the solid particles of the resin catalyst can be prevented from leaving the catalyst bed 1021 along with the low hydrogen-containing silicone oil crude product, so that the solid particles of the resin catalyst can be prevented from being mixed into the low hydrogen-containing silicone oil crude product.
In addition, when the first supporting layer 1022 and the second supporting layer 1023 are formed by stacking glass beads, the flow pressure in the fixed bed reactor 102 is further prevented from being large, and the fluid circulation is further prevented from being influenced; the size of the plurality of glass beads filled in the first support layer 1022 is larger than the size of the resin catalyst solid particles; the size of the plurality of glass beads filled in the second support layer 1023 is larger than that of the resin catalyst solid particles. Specifically, the size of each glass bead filled in the first support layer 1022 is larger than the size of the resin catalyst solid particle; the size of each glass bead filled in the second support layer 1023 is larger than that of the solid particles of the resin catalyst
In practical applications, in order to smoothly realize continuous production of low hydrogen-containing silicone oil, as shown in fig. 4, in one embodiment, the low hydrogen-containing silicone oil production system 10 provided in the embodiment of the present application further includes an intermediate tank 104; the intermediate tank 104 has an inlet and an outlet; the outlet of the batching kettle 101 is communicated with the inlet of the intermediate tank 104, and the outlet of the intermediate tank 104 is communicated with the inlet of the fixed bed reactor 102.
The intermediate tank 104 may be used to temporarily store the mixed preparation raw materials of the batching kettle 101.
By adopting the above scheme, the intermediate tank 104 is arranged between the batching kettle 101 and the fixed bed reactor 102, when the low hydrogen-containing silicone oil production system 10 initially operates, the batching kettle 101 and the intermediate tank 104 can be opened, and after a certain amount of mixed preparation raw materials exist in the intermediate tank 104, subsequent devices such as the fixed bed reactor 102 and the crude product tank 103 in the system can be operated, so that continuous production of hydrogen-containing silicone oil is realized.
In order to avoid impurities in the preparation raw material entering the fixed bed reactor 102, as shown in fig. 4, in one embodiment, the system 10 for producing low hydrogen-containing silicone oil provided by the present embodiment further includes a first filtering device 105; the first filter device 105 has an inlet and an outlet; the outlet of the intermediate tank 104 communicates with the inlet of a first filtering device 105, and the outlet of the first filtering device 105 communicates with the inlet of the fixed bed reactor 102.
Wherein, the first filtering device 105 can be used for filtering impurities in the preparation raw material.
It can be understood that, with the above-mentioned solution, the impurities in the preparation raw material are filtered by the first filtering device 105 disposed between the intermediate tank 104 and the fixed bed reactor 102, so that the impurities can be prevented from entering the first supporting layer and the second supporting layer in the fixed bed reactor 102 to block the pores. Meanwhile, impurities can be prevented from entering a catalyst bed 1021 in the fixed bed reactor 102, and the catalytic activity of solid particles of the resin catalyst can be prevented from being influenced.
Considering that there may be some small particles of resin catalyst solids in catalyst bed 1021, resulting in the mixing of these small particles of resin catalyst solids in the low hydrogen silicone oil crude product; in one embodiment, as shown in fig. 4, the low hydrogen silicone oil production system 10 provided in the embodiment of the present application further includes a second filtering device 106, the second filtering device 106 has an inlet and an outlet, the outlet of the fixed bed reactor 102 is communicated with the inlet of the second filtering device 106, and the outlet of the second filtering device 106 is communicated with the inlet of the crude product tank 103.
The second filtering device 106 can be used for filtering solid particles of the resin catalyst with smaller particles mixed in the crude low hydrogen-containing silicone oil product discharged from the fixed bed reactor 102.
It can be understood that, with the above-mentioned solution, the quality of the low hydrogen-containing silicone oil can be improved by arranging the second filtering device 106 between the fixed bed reactor 102 and the crude product tank 103 to filter the resin catalyst solid particles with smaller particles mixed in the crude product of the low hydrogen-containing silicone oil.
In practical applications, in order to further purify the crude low hydrogen-containing silicone oil product to obtain a low hydrogen-containing silicone oil product, in one embodiment, the low hydrogen-containing silicone oil production system 10 provided in the embodiment of the present application further includes a dephlegmator 107, a third filtering device 108, and a product tank 109; the lower stripper 107 has an inlet and an outlet, the third filtration device 108 has an inlet and an outlet, the product tank 109 has an inlet; the outlet of the crude product tank 103 is communicated with the inlet of the low-level removing tower 107, and the outlet of the low-level removing tower 107 is communicated with the inlet of the third filtering device 108; the outlet of the third filter means 108 communicates with the inlet of the product tank 109.
The low-boiling point component in the low hydrogen-containing silicone oil crude product can be removed by the low-boiling point removal tower 107 according to different boiling points of the components in the low hydrogen-containing silicone oil crude product, so that the low hydrogen-containing silicone oil crude product can be purified.
The third filtering device 108 can be used for filtering impurities mixed in the purified low hydrogen-containing silicone oil, and the impurities can be rust impurities generated by the low-hydrogen-removing tower 107.
The product tank 109 may be used to store the final low hydrogen silicone oil product.
It can be understood that, by adopting the above scheme, the crude product of the low hydrogen-containing silicone oil can be purified by sequentially arranging the low-removing tower 107, the third filtering device 108 and the product tank 109 behind the crude product tank 103, and then the final low hydrogen-containing silicone oil product can be obtained.
The technical effects that the low hydrogen-containing silicone oil production system provided by the above embodiments of the present application can achieve are explained below with reference to specific embodiments.
Example 1
Weighing the components in a mass ratio of 7.29:1 octamethylcyclotetrasiloxane and high hydrogen silicone oil (hydrogen content of 1.6%), and hexamethyldisiloxane in an amount of 1.9% by mass of the total mass of the raw materials for preparation. Adding the preparation raw materials into a batching kettle, stirring and heating to 60-90 ℃, and maintaining for 1h. Then, the mixed preparation raw materials in the batching kettle are pumped into a middle tank, and the temperature of the middle tank is maintained at 60-90 ℃. Further, the preparation raw material in the intermediate tank is introduced into a first filtering device to remove impurities, and then the preparation raw material is pumped into a fixed bed reactor. Wherein the flow rate of the preparation raw material pump is controlled to be 10g/min-50g/min, and the temperature of the fixed bed reactor is maintained to be 60 ℃ to 90 ℃. And further filtering and reducing the crude product of the low-hydrogen silicone oil from the fixed bed reactor to obtain a colorless and transparent neutral low-hydrogen silicone oil product.
The low hydrogen silicone oil prepared in this example has an Si-H value of4.6 to 5.8 percent of low hydrogen silicone oil with the viscosity of 30mm 2 /s-120mm 2 And/s, high quality.
Example 2:
weighing the components in a mass ratio of 3.51:1 octamethylcyclotetrasiloxane and high hydrogen silicone oil (hydrogen content of 1.6%), and 1.5% hexamethyldisiloxane in an amount of 1.5% by weight of the total mass of the raw materials. Adding the preparation raw materials into a batching kettle, stirring and heating to 60-90 ℃, and maintaining for 1h. Then, the mixed preparation raw materials in the batching kettle are pumped into a middle tank, and the temperature of the middle tank is maintained at 60-90 ℃. Further, the preparation raw materials in the intermediate tank are introduced into a first filtering device to remove impurities, and then the preparation raw materials are pumped into a fixed bed reactor. Wherein the flow rate of the raw material preparation pump is controlled to be 10g/min-50g/min, and the temperature of the fixed bed reactor is maintained to be 60-90 ℃. And further filtering and reducing the crude product of the low-hydrogen silicone oil from the fixed bed reactor to obtain a colorless and transparent neutral low-hydrogen silicone oil product.
The Si-H value of the low hydrogen silicone oil prepared by the embodiment is 9.0-11.3%, and the viscosity of the low hydrogen silicone oil is 30mm 2 /s-120mm 2 And/s, high quality.
Example 3:
weighing the components in a mass ratio of 2.22:1 octamethylcyclotetrasiloxane and high hydrogen silicone oil (hydrogen content is 1.6%) and hexamethyldisiloxane in an amount of 1% by total mass of the raw materials for preparation. Adding the preparation raw materials into a batching kettle, stirring and heating to 60-90 ℃, and maintaining for 1h. Then, the mixed preparation raw materials in the batching kettle are pumped into a middle tank, and the temperature of the middle tank is maintained at 60-90 ℃. Further, the preparation raw material in the intermediate tank is introduced into a first filtering device to remove impurities, and then the preparation raw material is pumped into a fixed bed reactor. Wherein the flow rate of the raw material preparation pump is controlled to be 10g/min-50g/min, and the temperature of the fixed bed reactor is maintained to be 60-90 ℃. And further filtering and reducing the crude product of the low-hydrogen silicone oil from the fixed bed reactor to obtain a colorless and transparent neutral low-hydrogen silicone oil product.
The low hydrogen silicone oil prepared by the embodiment has the Si-H value of 13-16 percent and the low hydrogen silicone oilThe viscosity is 30mm 2 /s-120mm 2 And/s, high quality.
Example 4:
weighing the components in a mass ratio of 1:1 of octamethylcyclotetrasiloxane and high hydrogen silicone oil (hydrogen content is 1.6%), and hexamethyldisiloxane in an amount of 1% of the total mass of the raw materials. Adding the preparation raw materials into a batching kettle, stirring and heating to 60-90 ℃, and maintaining for 1h. Then, the mixed preparation raw materials in the batching kettle are pumped into a middle tank, and the temperature of the middle tank is maintained at 60-90 ℃. Further, the preparation raw material in the intermediate tank is introduced into a first filtering device to remove impurities, and then the preparation raw material is pumped into a fixed bed reactor. Wherein the flow rate of the raw material preparation pump is controlled to be 10g/min-50g/min, and the temperature of the fixed bed reactor is maintained to be 60-90 ℃. And further filtering and reducing the crude product of the low-hydrogen silicone oil from the fixed bed reactor to obtain a colorless and transparent neutral low-hydrogen silicone oil product.
The Si-H value of the low hydrogen silicone oil prepared by the embodiment is 19.4-24.1%, and the viscosity of the low hydrogen silicone oil is 30mm 2 /s-120mm 2 And/s, high quality.
Therefore, the low-hydrogen silicone oil production system provided by the embodiment of the application is adopted to produce the low-hydrogen silicone oil, and the system comprises a batching kettle, a fixed bed reactor and a crude product tank; the batching kettle has an outlet, the fixed bed reactor has an inlet and an outlet, and the crude product tank has an inlet; an outlet of the batching kettle is communicated with an inlet of the fixed bed reactor, and an outlet of the fixed bed reactor is communicated with an inlet of the crude product tank; a catalyst bed layer is arranged in the fixed bed reactor, and resin catalyst solid particles are filled in the catalyst bed layer; can avoid the mechanical damage of the resin catalyst, ensure the catalytic activity and reduce the fine particles in the crude product of the low hydrogen-containing silicone oil, thereby improving the quality of the low hydrogen-containing silicone oil.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A low hydrogen-containing silicone oil production system is characterized by comprising a batching kettle, a fixed bed reactor and a crude product tank;
wherein the batching kettle has an outlet, the fixed bed reactor has an inlet and an outlet, and the crude product tank has an inlet;
the outlet of the batching kettle is communicated with the inlet of the fixed bed reactor, and the outlet of the fixed bed reactor is communicated with the inlet of the crude product tank;
and a catalyst bed layer is arranged in the fixed bed reactor, and resin catalyst solid particles are filled in the catalyst bed layer.
2. The system for producing low hydrogen-containing silicone oil according to claim 1, wherein a first supporting layer and a second supporting layer are further disposed in the fixed bed reactor;
the first support layer is arranged on a first surface of the catalyst bed layer, and the first surface is the surface of the catalyst bed layer facing the bottom of the fixed bed reactor;
the second support layer is arranged on a second surface of the catalyst bed layer, and the second surface is a surface of the catalyst bed layer facing the top of the fixed bed reactor.
3. The system for producing low hydrogen silicone oil according to claim 2, wherein the first support layer and the second support layer are both filter screens.
4. The system for producing low hydrogen-containing silicone oil according to claim 3, wherein the filter mesh has a pore size smaller than the size of the solid particles of the resin catalyst.
5. The low hydrogen silicone oil production system according to claim 2, wherein the first support layer extends from the bottom of the fixed bed reactor to the first surface of the catalyst bed layer, and the first support layer is filled with a plurality of glass beads;
the second support layer extends from the second surface of the catalyst bed to the top of the fixed bed reactor, the second support layer being filled with a plurality of glass beads.
6. The low hydrogen-containing silicone oil production system according to claim 5, wherein the first support layer fills voids between the plurality of glass beads, the voids having a size smaller than that of the solid particles of the resin catalyst;
the size of the gaps among the plurality of glass beads filled with the second support layer is smaller than the size of the solid particles of the resin catalyst.
7. The low hydrogen-containing silicone oil production system according to claim 6, wherein the first support layer is filled with a plurality of glass beads having a size larger than that of the solid particles of the resin catalyst;
the size of the plurality of glass beads filled in the second support layer is larger than that of the solid particles of the resin catalyst.
8. The system for producing low hydrogen-containing silicone oil according to claim 1, further comprising an intermediate tank;
the intermediate tank has an inlet and an outlet;
the outlet of the batching kettle is communicated with the inlet of the intermediate tank, and the outlet of the intermediate tank is communicated with the inlet of the fixed bed reactor.
9. The system for producing low hydrogen-containing silicone oil according to claim 8, further comprising a first filtration device;
the first filter device has an inlet and an outlet;
the outlet of the intermediate tank is communicated with the inlet of a first filtering device, and the outlet of the first filtering device is communicated with the inlet of the fixed bed reactor.
10. The system for producing low hydrogen silicone oil according to claim 1, further comprising a second filtration device, a dephlegmator, a third filtration device, and a product tank;
the second filtration device has an inlet and an outlet, the lower knockout column has an inlet and an outlet, the third filtration device has an inlet and an outlet, the product tank has an inlet, and the crude tank also has an outlet;
an outlet of the fixed bed reactor is communicated with an inlet of the second filtering device, and an outlet of the second filtering device is communicated with an inlet of the crude product tank;
an outlet of the crude product tank is communicated with an inlet of the low-boiling tower, and an outlet of the low-boiling tower is communicated with an inlet of the third filtering device;
the outlet of the third filter device is communicated with the inlet of the product tank.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115558106A (en) * | 2022-10-27 | 2023-01-03 | 江西蓝星星火有机硅有限公司 | Utilization method of low fraction removed of hydrogen-containing silicone oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115558106A (en) * | 2022-10-27 | 2023-01-03 | 江西蓝星星火有机硅有限公司 | Utilization method of low fraction removed of hydrogen-containing silicone oil |
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Effective date of registration: 20230806 Address after: Room 202, 2 / F, 530 Yashan West Road, gangang District, Jiaxing City, Zhejiang Province, 314201 Patentee after: Hesheng silicon (Jiaxing) Co.,Ltd. Address before: 314201 No. 530 Yashan Road, Zhapu Town, Jiaxing City, Zhejiang Province Patentee before: HOSHINE SILICON INDUSTRY CO.,LTD. |