CN215743495U - Silicone rubber raw rubber production device - Google Patents
Silicone rubber raw rubber production device Download PDFInfo
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- CN215743495U CN215743495U CN202122082658.XU CN202122082658U CN215743495U CN 215743495 U CN215743495 U CN 215743495U CN 202122082658 U CN202122082658 U CN 202122082658U CN 215743495 U CN215743495 U CN 215743495U
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Abstract
The utility model relates to the technical field of raw silicone rubber production, in particular to a raw silicone rubber production device which comprises a cation exchange resin fixed bed, an anion exchange resin fixed bed, a dehydration molecular sieve fixed bed, a refined raw material storage tank, a preheater, a dehydration kettle, a polymerization kettle, a low molecular removal device, at least 1 intermediate storage tank and a rubber outlet cooler, wherein a first feeding pipeline is fixedly communicated with an upper inlet of the cation exchange resin fixed bed. The utility model has reasonable and compact structure and convenient use, effectively removes various metal cations, non-metal ions and water in the raw material octamethylcyclotetrasiloxane by pre-treating the raw material, ensures that the polymerization effect of the polymerization reaction is better, and the produced raw rubber has the characteristics of transparent product appearance and uniform molecular weight distribution.
Description
Technical Field
The utility model relates to the technical field of raw silicone rubber production, and discloses a raw silicone rubber production device.
Background
Raw silicone rubber is prepared by mixing dimethyl siloxane or octamethylcyclotetrasiloxane as raw materials, small materials (ring bodies containing special groups such as tetramethyltetravinylcyclotetrasiloxane and the like, end-capping agents such as divinyltetramethyldisiloxane and hexamethyldisiloxane and the like) and catalysts (such as potassium hydroxide, sodium hydroxide, tetramethylammonium hydroxide and the like) to perform polymerization reaction under the conditions of certain temperature and vacuum degree, removing the catalysts, unreacted small molecules and other substances in the polymer by using a low molecular remover device after the polymerization reaction is finished, and discharging the materials through a cooler.
The industrial octamethylcyclotetrasiloxane contains metal and nonmetal ions such as iron, magnesium, aluminum, chlorine and the like, and also contains part of moisture. The presence of some metal cations can lead to yellowing of the subsequent product. The existence of chloride ions can corrode equipment and pipelines, material leakage can be caused to happen disaster in severe cases, and the product is yellow when the raw silicon rubber is produced. When the moisture content in the octamethylcyclotetrasiloxane is too high, poor polymerization effect, long polymerization time or no polymerization phenomenon can be caused in the process of producing the raw silicone rubber. The polymerized raw silicone rubber has uneven molecular weight distribution and higher hydroxyl end group content, so that roll sticking and structural phenomena are easy to generate during the preparation of the mixed silicone rubber. In the process of preparing the crude silicone rubber, metal cations in the octamethylcyclotetrasiloxane can cause certain groups in the crude silicone rubber to fall off under the high-temperature condition, so that the crude silicone rubber generates partial crosslinking phenomenon, and the crude silicone rubber generates adverse phenomena of uneven molecular weight distribution, yellowing product appearance and the like.
Disclosure of Invention
The utility model provides a raw silicon rubber production device, overcomes the defects of the prior art, and can effectively solve the problems of uneven molecular weight and yellowing appearance of raw silicon rubber produced by the conventional raw silicon rubber production device.
The technical scheme of the utility model is realized by the following measures: a raw silicon rubber production device comprises a cation exchange resin fixed bed, an anion exchange resin fixed bed, a dehydration molecular sieve fixed bed, a refined raw material storage tank, a preheater, a dehydration kettle, a polymerization kettle, a low molecular removal device, at least 1 intermediate storage tank and a rubber outlet cooler, wherein a first feeding pipeline is fixedly communicated with an upper inlet of the cation exchange resin fixed bed, a first pretreatment pipeline is fixedly communicated between an outlet of the cation exchange resin fixed bed and an inlet of the anion exchange resin fixed bed, a second pretreatment pipeline is fixedly communicated between an outlet of the anion exchange resin fixed bed and an inlet of the dehydration molecular sieve fixed bed, a third pretreatment pipeline is fixedly communicated between an outlet of the dehydration molecular sieve fixed bed and an inlet of the refined raw material storage tank, a second feeding pipeline is fixedly communicated between an outlet of the refined raw material storage tank and a low-temperature side inlet of the preheater, a third feeding pipeline is fixedly communicated between a low-temperature side outlet and a top inlet of the dehydration kettle, a fourth feeding pipeline is fixedly communicated between an outlet at the bottom of the dehydration kettle and an inlet at the top of the polymerization kettle, a first discharging pipeline is fixedly communicated between the outlet at the bottom of the polymerization kettle and an inlet at the top of the low molecular weight removing device, a second discharging pipeline is fixedly communicated between the outlet at the bottom of the low molecular weight removing device and an inlet of each intermediate storage tank, a third discharging pipeline is fixedly communicated between an outlet of each intermediate storage tank and an inlet of the glue cooler, and a fourth discharging pipeline is fixedly communicated between an outlet of the glue cooler.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the top inlets of the dehydration kettle, the polymerization kettle and the intermediate storage tank are respectively fixedly communicated with a nitrogen pipeline and a vacuum pumping pipeline, and the bottom inlet of the dehydration kettle is fixedly communicated with a nitrogen pipeline.
The outlet at the top of the dehydration kettle is fixedly communicated with a first removal pipeline, and the outlet at the upper part of the low molecular weight remover is fixedly communicated with a second removal pipeline.
The top inlet of the polymerization kettle is fixedly communicated with a feeding pipeline.
The inlet and the outlet of the high-temperature side of the preheater are respectively fixedly communicated with a heat medium pipeline, and a raw material pump is fixedly arranged on the second feeding pipeline.
Flow control valves are fixedly arranged on the first feeding pipeline, the first pretreatment pipeline, the second pretreatment pipeline and the third pretreatment pipeline, valves are respectively and fixedly arranged on the first feeding pipelines corresponding to the left side and the right side of the flow control valve on the first feeding pipeline, valves are respectively and fixedly arranged on the first pretreatment pipelines corresponding to the left and right sides of the flow control valve on the first pretreatment pipeline, valves are respectively and fixedly arranged on the second pretreatment pipelines corresponding to the left and right sides of the flow control valve on the second pretreatment pipeline, valves are respectively and fixedly installed on the third pretreatment pipelines corresponding to the left side and the right side of the flow control valve on the third pretreatment pipeline, the flow control valve is fixedly installed on the second feeding pipeline, and valves are fixedly installed on the fourth feeding pipeline, the first discharging pipeline, the second discharging pipeline and the third discharging pipeline.
The utility model has reasonable and compact structure and convenient use, effectively removes various metal cations, non-metal ions and water in the raw material octamethylcyclotetrasiloxane by pre-treating the raw material, ensures that the polymerization effect of the polymerization reaction is better, and the produced raw rubber has the characteristics of transparent product appearance and uniform molecular weight distribution.
Drawings
FIG. 1 is a schematic process flow diagram of the preferred embodiment of the present invention.
The codes in the figures are respectively: 1 is a cation exchange resin fixed bed, 2 is an anion exchange resin fixed bed, 3 is a dehydrated molecular sieve fixed bed, 4 is a refined raw material storage tank, 5 is a preheater, 6 is a dehydration kettle, 7 is a polymerization kettle, 8 is a low molecular weight removal device, 9 is an intermediate storage tank, 10 is a glue outlet cooler, 11 is a first feeding pipeline, 12 is a first pretreatment pipeline, 13 is a second pretreatment pipeline, 14 is a third pretreatment pipeline, 15 is a second feeding pipeline, 16 is a third feeding pipeline, 17 is a fourth feeding pipeline, 18 is a first discharging pipeline, 19 is a second discharging pipeline, 20 is a third discharging pipeline, 21 is a fourth discharging pipeline, 22 is a nitrogen pipeline, 23 is a vacuum pumping pipeline, 24 is a first removal pipeline, 25 is a second removal pipeline, 26 is a feeding pipeline, 27 is a thermal medium pipeline, 28 is a raw material pump, 29 is a flow control valve, and 30 is a valve.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The utility model is further described with reference to the following examples and figures:
as shown in figure 1, the crude silicone rubber production device comprises a cation exchange resin fixed bed 1, an anion exchange resin fixed bed 2, a dehydrated molecular sieve fixed bed 3, a refined raw material storage tank 4, a preheater 5, a dehydration kettle 6, a polymerization kettle 7, a low molecular removal device 8, at least 1 intermediate storage tank 9 and a rubber discharge cooler 10, wherein a first feeding pipeline 11 is fixedly communicated with an upper inlet of the cation exchange resin fixed bed 1, a first pretreatment pipeline 12 is fixedly communicated between an outlet of the cation exchange resin fixed bed 1 and an inlet of the anion exchange resin fixed bed 2, a second pretreatment pipeline 13 is fixedly communicated between an outlet of the anion exchange resin fixed bed 2 and an inlet of the dehydrated molecular sieve fixed bed 3, a third pretreatment pipeline 14 is fixedly communicated between an outlet of the dehydrated molecular sieve fixed bed 3 and an inlet of the refined raw material storage tank 4, a second feeding pipeline 15 is fixedly communicated between an outlet of the refined raw material storage tank 4 and a low-temperature side inlet of the preheater 5, the fixed intercommunication of 5 low temperature side exports of pre-heater and 6 top imports of dehydration cauldron has third charge-in pipeline 16, the fixed intercommunication has fourth charge-in pipeline 17 between 6 bottom exports of dehydration cauldron and the 7 top imports of polymeric kettle, the fixed intercommunication has first discharge line 18 between 7 bottom exports of polymeric kettle and the 8 top imports of low molecule ware of taking off, it has second discharge line 19 to take off the fixed intercommunication between 8 bottom exports of low molecule ware and every intermediate storage tank 9 import, 9 exports of every intermediate storage tank and goes out and glue fixed intercommunication between the 10 imports of cooler has third discharge line 20, it has fourth discharge line 21 to go out the fixed intercommunication of cooler 10 exports of gluing.
The existing raw rubber is prepared by directly pumping raw materials of octamethylcyclotetrasiloxane, small materials (a ring body containing a special group and a blocking agent) and a catalyst into a polymerization kettle for polymerization reaction, removing the catalyst, unreacted small molecules and other substances in a polymer by using a low molecular remover device after the polymerization reaction is finished, and discharging the materials through a cooler. Because the raw material octamethylcyclotetrasiloxane contains metal and non-metal ions such as iron, magnesium, aluminum, chlorine and the like and partial moisture, the polymerization effect of the polymerization reaction is poor, and the obtained crude rubber product is yellow and has uneven molecular weight distribution.
The method has the advantages that the raw material octamethylcyclotetrasiloxane is subjected to ion exchange by using the cation exchange resin in the cation exchange resin fixed bed 1 and the anion exchange resin in the anion exchange resin fixed bed 2 to remove metal cations and non-metal anions in the raw material, and then the dehydrated molecular sieve in the dehydrated molecular sieve fixed bed 3 is used for adsorption and dehydration, residual moisture in the raw material and moisture generated in the ion exchange process can be selectively adsorbed due to the unique porous structure of the dehydrated molecular sieve, and then the pretreated raw material is sequentially heated by the preheater 5, dehydrated by the dehydration kettle 6 and polymerized by the polymerization kettle 7 to obtain a crude rubber product. According to the utility model, the raw materials are pretreated in advance, so that various metal cations, non-metal ions and moisture in the raw material octamethylcyclotetrasiloxane are effectively removed, the polymerization effect of the polymerization reaction is better, and the produced raw rubber has the characteristics of transparent product appearance and uniform molecular weight distribution.
The production device of the raw silicon rubber can be further optimized or/and improved according to actual needs:
as shown in attached figure 1, the inlets at the top parts of the dehydration kettle 6, the polymerization kettle 7 and the intermediate storage tank 9 are respectively and fixedly communicated with a nitrogen pipeline 22 and a vacuum pumping pipeline 23, and the inlet at the bottom part of the dehydration kettle 6 is fixedly communicated with the nitrogen pipeline 22. In the using process, the vacuumizing pipeline 23 is used for vacuumizing the equipment, and the materials in the previous step are pressed into the equipment by using negative pressure; the nitrogen pipeline 22 at the top of each device is used for introducing nitrogen into the device for pressurization, and pressing materials in the device into the next working procedure; the nitrogen pipeline 22 at the bottom of the dehydration kettle 6 is used for conveying nitrogen into the dehydration kettle 6 to carry out bubbling dehydration on the raw materials.
As shown in the attached figure 1, the outlet at the top of the dehydration kettle 6 is fixedly communicated with a first removal pipeline 24, and the outlet at the upper part of the low molecular weight removal device 8 is fixedly communicated with a second removal pipeline 25. In the using process, the water removed from the dehydration kettle 6 or the taken raw materials are output through a first removal pipeline 24 and collected through a subsequent cooler and a dehydration receiver; the low molecular substances removed in the low molecular substance remover 8 are outputted through the second removing line 25 and collected by the subsequent cooler and the dehydration receiver.
As shown in FIG. 1, a feed line 26 is connected to the inlet at the top of the polymerizer 7. During use, the small materials (the ring body containing the specific group and the blocking agent) and the catalyst are fed into the polymerization vessel 7 through the feed line 26, and are polymerized with the raw materials.
As shown in fig. 1, the inlet and the outlet of the high temperature side of the preheater 5 are respectively and fixedly communicated with a heat medium pipeline 27, and the second feeding pipeline 15 is fixedly provided with a raw material pump 28. During use, the raw material in the refined raw material tank 4 is fed to the preheater 5 by the raw material pump 28, and the heat medium fed through the heat medium line 27 is heated.
As shown in fig. 1, the first feed line 11, the first pre-treatment line 12, the second pre-treatment line 13 and the third pre-treatment line 14 are fixedly provided with a flow control valve 29, the first feed line 11 corresponding to the left and right sides of the flow control valve 29 on the first feed line 11 is respectively and fixedly provided with a valve 30, the first pre-treatment line 12 corresponding to the left and right sides of the flow control valve 29 on the first pre-treatment line 12 is respectively and fixedly provided with a valve 30, the second pre-treatment line 13 corresponding to the left and right sides of the flow control valve 29 on the second pre-treatment line 13 is respectively and fixedly provided with a valve 30, the third pre-treatment line 14 corresponding to the left and right sides of the flow control valve 29 on the third pre-treatment line 14 is respectively and fixedly provided with a valve 30, the second feed line 15 is fixedly provided with a flow control valve 29, the fourth feed line 17, Valves 30 are fixedly arranged on the first discharge pipeline 18, the second discharge pipeline 19 and the third discharge pipeline 20.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
The use process of the best embodiment of the utility model is as follows: firstly, raw material octamethylcyclotetrasiloxane (hereinafter referred to as D4) is conveyed to a cation exchange resin fixed bed 1 through a first feeding pipeline 11, metal cations (mainly cations such as iron, magnesium, aluminum and the like) in D4 are removed, D4 from which the metal cations are removed is conveyed to an anion exchange resin fixed bed 2 through a first pretreatment pipeline 12, non-metal anions (mainly chloride) in D4 are removed, D4 from which the non-metal anions are removed is conveyed to a dehydration molecular sieve fixed bed 3 through a second pretreatment pipeline 13, residual moisture in D4 and moisture produced by ion exchange action through the cation exchange resin fixed bed 1 and the anion exchange resin fixed bed 2 are removed, and dehydrated D4 is conveyed to a refined raw material storage tank 4 through a third pretreatment pipeline 14 for storage and standby application; then, the pretreated D4 is conveyed into a preheater 5 through a second feeding pipeline 15, the temperature of D4 is heated to 100 ℃ to 120 ℃, the heated D4 is conveyed into a dehydration kettle 6 through a third feeding pipeline 16, nitrogen is conveyed into the dehydration kettle 6 through a nitrogen pipeline 22 at the bottom of the dehydration kettle 6 under the conditions of 100 ℃ to 120 ℃ and the vacuum degree of-0.08 MPa to-0.1 MPa for bubbling dehydration, the dehydrated D4 is conveyed into a polymerization kettle 7 through a fourth feeding pipeline 17, then small materials (a ring body containing special groups and a blocking agent) and a catalyst are conveyed into the polymerization kettle 7 through a feeding pipeline 26, each material is subjected to polymerization reaction in the polymerization kettle 7 under the conditions of 100 ℃ to 120 ℃ and the vacuum degree of-0.08 MPa to-0.1 MPa to obtain raw rubber, the raw rubber is conveyed into a low molecular weight remover 8 through a first discharging pipeline 18, removing low molecular substances, and conveying the raw rubber without the low molecular substances to the intermediate storage tank 9 through a second discharge pipeline 19 for temporary storage; finally, the raw rubber in the intermediate storage tank 9 is conveyed to the rubber discharging cooler 10 through the third discharging pipeline 20 for cooling, and then is output through the fourth discharging pipeline 21.
Claims (8)
1. A raw silicon rubber production device is characterized by comprising a cation exchange resin fixed bed, an anion exchange resin fixed bed, a dehydration molecular sieve fixed bed, a refined raw material storage tank, a preheater, a dehydration kettle, a polymerization kettle, a low molecular removal device, at least 1 intermediate storage tank and a rubber discharge cooler, wherein a first feeding pipeline is fixedly communicated with an upper inlet of the cation exchange resin fixed bed, a first pretreatment pipeline is fixedly communicated between an outlet of the cation exchange resin fixed bed and an inlet of the anion exchange resin fixed bed, a second pretreatment pipeline is fixedly communicated between an outlet of the anion exchange resin fixed bed and an inlet of the dehydration molecular sieve fixed bed, a third pretreatment pipeline is fixedly communicated between an outlet of the dehydration molecular sieve fixed bed and an inlet of the refined raw material storage tank, a second feeding pipeline is fixedly communicated between an outlet of the refined raw material storage tank and a low-temperature side inlet of the preheater, the fixed intercommunication of pre-heater low temperature side export and dehydration cauldron top import has the third feedstock line, fixed intercommunication has the fourth feedstock line between dehydration cauldron bottom export and the polymeric kettle top import, the fixed intercommunication has first discharge line between polymeric kettle bottom export and the import of taking off low molecule ware top, it has the second discharge line to take off fixed intercommunication between low molecule ware bottom export and every intermediate storage tank import, every intermediate storage tank export and play are fixed the intercommunication between gluey cooler import have the third discharge line, it has the fourth discharge line to go out the fixed intercommunication of gluey cooler export.
2. The apparatus for producing crude silicone rubber as defined in claim 1, wherein the top inlets of the dehydration kettle, the polymerization kettle and the intermediate storage tank are respectively and fixedly communicated with a nitrogen pipeline and a vacuum pumping pipeline, and the bottom inlet of the dehydration kettle is fixedly communicated with a nitrogen pipeline.
3. The crude rubber production device of silicone rubber according to claim 1 or 2, characterized in that the top outlet of the dehydration kettle is fixedly communicated with a first removal pipeline, and the upper outlet of the low molecular removal device is fixedly communicated with a second removal pipeline.
4. The apparatus for producing crude silicone rubber according to claim 1 or 2, wherein the top inlet of the polymerizer is fixedly connected to a feed line.
5. The apparatus for producing crude rubber from silicone rubber as claimed in claim 3, wherein the top inlet of the polymerizer is fixedly connected to a feed line.
6. The crude rubber production device of silicone rubber according to claim 1, 2 or 5, wherein the inlet and outlet on the high temperature side of the preheater are respectively and fixedly communicated with a heat medium pipeline, and the second feed pipeline is fixedly provided with a raw material pump; or/and flow control valves are fixedly arranged on the first feeding pipeline, the first pretreatment pipeline, the second pretreatment pipeline and the third pretreatment pipeline, valves are respectively and fixedly arranged on the first feeding pipelines corresponding to the left side and the right side of the flow control valve on the first feeding pipeline, valves are respectively and fixedly arranged on the first pretreatment pipelines corresponding to the left and right sides of the flow control valve on the first pretreatment pipeline, valves are respectively and fixedly arranged on the second pretreatment pipelines corresponding to the left and right sides of the flow control valve on the second pretreatment pipeline, valves are respectively and fixedly installed on the third pretreatment pipelines corresponding to the left side and the right side of the flow control valve on the third pretreatment pipeline, the flow control valve is fixedly installed on the second feeding pipeline, and valves are fixedly installed on the fourth feeding pipeline, the first discharging pipeline, the second discharging pipeline and the third discharging pipeline.
7. The crude rubber production device of silicone rubber according to claim 3, wherein the inlet and outlet on the high temperature side of the preheater are respectively and fixedly communicated with a heat medium pipeline, and the second feeding pipeline is fixedly provided with a raw material pump; or/and flow control valves are fixedly arranged on the first feeding pipeline, the first pretreatment pipeline, the second pretreatment pipeline and the third pretreatment pipeline, valves are respectively and fixedly arranged on the first feeding pipelines corresponding to the left side and the right side of the flow control valve on the first feeding pipeline, valves are respectively and fixedly arranged on the first pretreatment pipelines corresponding to the left and right sides of the flow control valve on the first pretreatment pipeline, valves are respectively and fixedly arranged on the second pretreatment pipelines corresponding to the left and right sides of the flow control valve on the second pretreatment pipeline, valves are respectively and fixedly installed on the third pretreatment pipelines corresponding to the left side and the right side of the flow control valve on the third pretreatment pipeline, the flow control valve is fixedly installed on the second feeding pipeline, and valves are fixedly installed on the fourth feeding pipeline, the first discharging pipeline, the second discharging pipeline and the third discharging pipeline.
8. The crude rubber production device of silicone rubber according to claim 4, wherein the inlet and outlet on the high temperature side of the preheater are respectively and fixedly communicated with a heat medium pipeline, and the second feeding pipeline is fixedly provided with a raw material pump; or/and flow control valves are fixedly arranged on the first feeding pipeline, the first pretreatment pipeline, the second pretreatment pipeline and the third pretreatment pipeline, valves are respectively and fixedly arranged on the first feeding pipelines corresponding to the left side and the right side of the flow control valve on the first feeding pipeline, valves are respectively and fixedly arranged on the first pretreatment pipelines corresponding to the left and right sides of the flow control valve on the first pretreatment pipeline, valves are respectively and fixedly arranged on the second pretreatment pipelines corresponding to the left and right sides of the flow control valve on the second pretreatment pipeline, valves are respectively and fixedly installed on the third pretreatment pipelines corresponding to the left side and the right side of the flow control valve on the third pretreatment pipeline, the flow control valve is fixedly installed on the second feeding pipeline, and valves are fixedly installed on the fourth feeding pipeline, the first discharging pipeline, the second discharging pipeline and the third discharging pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122082658.XU CN215743495U (en) | 2021-08-31 | 2021-08-31 | Silicone rubber raw rubber production device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122082658.XU CN215743495U (en) | 2021-08-31 | 2021-08-31 | Silicone rubber raw rubber production device |
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| CN215743495U true CN215743495U (en) | 2022-02-08 |
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| CN202122082658.XU Active CN215743495U (en) | 2021-08-31 | 2021-08-31 | Silicone rubber raw rubber production device |
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