CN215743489U - High-quality octamethylcyclotetrasiloxane apparatus for producing - Google Patents
High-quality octamethylcyclotetrasiloxane apparatus for producing Download PDFInfo
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- CN215743489U CN215743489U CN202122082696.5U CN202122082696U CN215743489U CN 215743489 U CN215743489 U CN 215743489U CN 202122082696 U CN202122082696 U CN 202122082696U CN 215743489 U CN215743489 U CN 215743489U
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Abstract
The utility model relates to the technical field of octamethylcyclotetrasiloxane purification, and discloses a high-quality octamethylcyclotetrasiloxane production device which comprises a cation exchange resin fixed bed, an anion exchange resin fixed bed, a membrane device, a first storage tank, a second storage tank and a product tank, wherein a first feeding pipeline is fixedly communicated with an inlet of the cation exchange resin fixed bed, and a second feeding pipeline is fixedly communicated between an outlet of the cation exchange resin fixed bed and an inlet of the anion exchange resin fixed bed. The utility model has reasonable and compact structure and convenient use, utilizes a method of combining cation exchange resin, anion exchange resin and membrane separation to carry out post-treatment on the raw material D4 in industrial production, removes metal cations and non-metal ions in D4, reduces the moisture in D4 and the moisture generated in the ion exchange process, and obtains high-quality D4, and the whole device has the advantages of low investment, low energy consumption, energy conservation and environmental protection.
Description
Technical Field
The utility model relates to the technical field of octamethylcyclotetrasiloxane purification, and discloses a high-quality octamethylcyclotetrasiloxane production device.
Background
The organic silicon material has excellent high and low temperature resistance and electric insulation performance, and is widely applied to the fields of agriculture, industry, military and the like. The organic silicon products are various in types and complex in production process, and are prepared by starting from raw materials such as silicon powder, chloromethane and the like, synthesizing methyl chlorosilane monomers through catalytic reaction, preparing various types of polymers through a series of chemical reactions such as hydrolysis, cracking, rectification, polymerization and the like, and further processing the polymers into different types of products.
Octamethylcyclotetrasiloxane (abbreviated as D4) is a basic material for producing silicone oil and silicone rubber, and metal and non-metal ions such as iron, magnesium, aluminum, chlorine and the like exist in industrial grade D4 and contain partial 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 D4 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 raw silicone rubber, certain groups in the raw silicone rubber can fall off due to metal cations in D4 under a high-temperature condition, so that the raw silicone rubber is partially crosslinked, and the raw silicone rubber has the adverse phenomena of uneven molecular weight distribution, yellowing product appearance and the like.
At present, the process for preparing high-purity D4 is mainly a rectification method or a method coupled with rectification, so that the equipment investment is large and the energy consumption is high.
Disclosure of Invention
The utility model provides a high-quality octamethylcyclotetrasiloxane production device, overcomes the defects of the prior art, and can effectively solve the problems of large equipment investment and high energy consumption of the existing octamethylcyclotetrasiloxane purification device.
The technical scheme of the utility model is realized by the following measures: a high-quality octamethylcyclotetrasiloxane production device comprises a cation exchange resin fixed bed, an anion exchange resin fixed bed, a membrane device, a first storage tank, a second storage tank and a product tank, wherein an inlet of the cation exchange resin fixed bed is fixedly communicated with a first feeding pipeline, a second feeding 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 third feeding pipeline is fixedly communicated between an outlet of the anion exchange resin fixed bed and an inlet of the membrane device, a first discharging pipeline is fixedly communicated between an outlet of a membrane interception side of the membrane device and an inlet of the first storage tank, a second discharging pipeline is fixedly communicated between an outlet of the upper portion of the first storage tank and an inlet of the second storage tank, a third discharging pipeline is fixedly communicated between an outlet of the second storage tank and the third feeding pipeline, a fourth discharging pipeline is fixedly communicated between an outlet of a membrane permeation side of the membrane device and an inlet of the product tank, and the outlet of the product tank is fixedly communicated with a fifth discharge pipeline.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the membrane device comprises at least two membrane filters, each membrane filter is connected in series or in parallel, and the membrane in each membrane filter is an oleophilic hydrophobic membrane.
And the third discharging pipeline and the fifth discharging pipeline are fixedly provided with conveying pumps.
And the outlets at the top parts of the first storage tank, the second storage tank and the product tank are fixedly communicated with emptying pipelines, and the outlets at the lower parts of the first storage tank and the second storage tank are fixedly communicated with liquid discharge pipelines.
Flow control valves are fixedly arranged on the first feeding pipeline, the second feeding pipeline and the fourth discharging pipeline, a flow control valve is fixedly arranged on a third feeding pipeline between the anion exchange resin fixed bed and the third discharging 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 second feeding pipelines corresponding to the left side and the right side of the flow control valve on the second feeding pipeline, valves are respectively and fixedly arranged on the third feeding pipelines corresponding to the left side and the right side of the flow control valve on the third feeding pipeline, valves are respectively and fixedly arranged on the fourth discharging pipelines corresponding to the left side and the right side of the flow control valve on the fourth discharging pipeline, and valves are fixedly arranged on the third discharging pipelines corresponding to the left side and the right side of the conveying pump on the third discharging pipeline, valves are fixedly arranged on the fifth discharging pipelines corresponding to the left side and the right side of the conveying pump on the fifth discharging pipeline, and valves are fixedly arranged on the emptying pipeline and the liquid discharging pipeline.
The utility model has reasonable and compact structure and convenient use, carries out post-treatment on octamethylcyclotetrasiloxane (D4 for short) which is a raw material in industrial production by utilizing a method of combining cation exchange resin, anion exchange resin and membrane separation, removes metal cations and non-metal ions in D4, reduces moisture in D4 and moisture generated in the ion exchange process, obtains high-quality D4, and has the advantages of low investment of the whole device, low energy consumption, energy conservation and environmental protection.
Drawings
FIG. 1 is a schematic process flow diagram of the preferred embodiment of the present invention.
The codes in the figures are respectively: the device comprises a cation exchange resin fixed bed 1, an anion exchange resin fixed bed 2, a membrane device 3, a first storage tank 4, a second storage tank 5, a product tank 6, a first feeding pipeline 7, a second feeding pipeline 8, a third feeding pipeline 9, a first discharging pipeline 10, a second discharging pipeline 11, a third discharging pipeline 12, a fourth discharging pipeline 13, a fifth discharging pipeline 14, a delivery pump 15, an emptying pipeline 16, a liquid discharging pipeline 17, a flow control valve 18 and a valve 19.
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 high-quality octamethylcyclotetrasiloxane production device comprises a cation exchange resin fixed bed 1, an anion exchange resin fixed bed 2, a membrane device 3, a first storage tank 4, a second storage tank 5 and a product tank 6, wherein an inlet of the cation exchange resin fixed bed 1 is fixedly communicated with a first feeding pipeline 7, an outlet of the cation exchange resin fixed bed 1 is fixedly communicated with an inlet of the anion exchange resin fixed bed 2 through a second feeding pipeline 8, an outlet of the anion exchange resin fixed bed 2 is fixedly communicated with an inlet of the membrane device 3 through a third feeding pipeline 9, an outlet of a membrane interception side of the membrane device 3 is fixedly communicated with an inlet of the first storage tank 4 through a first discharging pipeline 10, an outlet of the first storage tank 4 and an inlet of the second storage tank 5 are fixedly communicated with a second discharging pipeline 11, an outlet of the second storage tank 5 and an inlet of the third feeding pipeline 9 are fixedly communicated with a third discharging pipeline 12, a fourth discharge pipeline 13 is fixedly communicated between the membrane permeation side outlet of the membrane device 3 and the inlet of the product tank 6, and a fifth discharge pipeline 14 is fixedly communicated with the outlet of the product tank 6.
The existing octamethylcyclotetrasiloxane purification device is mainly carried out by rectification or a treatment method coupled with rectification, but has the problems of large equipment investment and high energy consumption, and the industrial raw material octamethylcyclotetrasiloxane (D4 for short) is subjected to ion exchange by mainly utilizing cation exchange resin in a cation exchange resin fixed bed 1 and anion exchange resin in an anion exchange resin fixed bed 2 to remove metal cations and non-metal ions in the raw material, and then is subjected to membrane separation treatment by a membrane device 3, and D4 selectively permeates a membrane to effectively intercept moisture in D4 and moisture generated in the ion exchange process, so that high-quality D4 is obtained. The utility model can also convey the oil-water mixture which does not permeate the membrane in the membrane device 3 to the first storage tank 4, the density difference of oil and water (the density of D4 is smaller than that of water) is utilized in the first storage tank 4, the D4 on the upper layer of the first storage tank 4 is conveyed to the second storage tank 5, and the D4 in the second storage tank 5 returns to the membrane device 3 through the third discharge pipeline 12 and the third feed pipeline 9 for re-separation, thereby not causing the waste of resources.
In a word, the utility model mainly utilizes a method of combining cation exchange resin, anion exchange resin and membrane separation to carry out post-treatment on octamethylcyclotetrasiloxane (D4 for short) which is a raw material in industrial production, removes metal cations and non-metal ions in D4, reduces moisture in D4 and moisture generated in an ion exchange process, and obtains high-quality D4.
The production device of the high-quality octamethylcyclotetrasiloxane can be further optimized or/and improved according to actual needs:
as shown in fig. 1, the membrane device 3 includes at least two membrane filters, each membrane filter is connected in series or in parallel, and the membrane in each membrane filter is an oleophilic hydrophobic membrane. Through the arrangement, the moisture in the D4 and the moisture generated in the ion exchange process can be greatly reduced, so that the membrane separation effect is better.
As shown in fig. 1, a transfer pump 15 is fixedly installed on the third discharging line 12 and the fifth discharging line 14.
As shown in the attached figure 1, the outlets at the top parts of the first storage tank 4, the second storage tank 5 and the product tank 6 are fixedly communicated with emptying pipelines 16, and the outlets at the lower parts of the first storage tank 4 and the second storage tank 5 are fixedly communicated with drainage pipelines 17.
As shown in fig. 1, flow control valves 18 are fixedly installed on the first feeding line 7, the second feeding line 8 and the fourth discharging line 13, flow control valves 18 are fixedly installed on the third feeding line 9 between the anion exchange resin fixed bed 2 and the third discharging line 12, valves 19 are respectively fixedly installed on the first feeding line 7 corresponding to the left and right sides of the flow control valve 18 on the first feeding line 7, valves 19 are respectively fixedly installed on the second feeding line 8 corresponding to the left and right sides of the flow control valve 18 on the second feeding line 8, valves 19 are respectively fixedly installed on the third feeding line 9 corresponding to the left and right sides of the flow control valve 18 on the third feeding line 9, valves 19 are respectively fixedly installed on the fourth discharging line 13 corresponding to the left and right sides of the flow control valve 18 on the fourth discharging line 13, and valves 19 are respectively installed on the left and right sides of the conveying pump 15 corresponding to the third discharging line 12, The third discharging pipelines 12 on the right two sides are fixedly provided with valves 19, the fifth discharging pipelines 14 corresponding to the left and right sides of the delivery pump 15 on the fifth discharging pipelines 14 are fixedly provided with valves 19, and the emptying pipelines 16 and the liquid discharge pipelines 17 are both fixedly provided with valves 19.
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, D4 is conveyed to the cation exchange resin fixed bed 1 through the first feeding line 7 under the condition of room temperature, 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 the anion exchange resin fixed bed 2 through the second feeding line 8, non-metal anions (mainly chloride ions) in D4 are removed, D4 from which the metal cations and the non-metal anions are removed is conveyed to the membrane device 3 through the third feeding line 9 for membrane separation, D4 which selectively permeates through the membrane is conveyed to the product tank 6 through the fourth discharging line 13, moisture in D4 and moisture which is generated in the ion exchange process of D4 are intercepted, the intercepted oil-water mixture is conveyed to the storage tank first 4 through the first discharging line 10, and the density difference of the oil-water is utilized (the density of D4 is smaller than that of water), d4 at the upper layer of the storage tank I4 is conveyed into the storage tank II 5 through a second discharge pipeline 11, D4 in the storage tank II 5 is output by a conveying pump 15 and conveyed back into the membrane device 3 for membrane separation again, D4 selectively permeating membranes is conveyed into the product tank 6 through a fourth discharge pipeline 13, and D4 in the product tank 6 is conveyed outwards through a fifth discharge pipeline 14.
Claims (7)
1. A high-quality octamethylcyclotetrasiloxane production device is characterized by comprising a cation exchange resin fixed bed, an anion exchange resin fixed bed, a membrane device, a first storage tank, a second storage tank and a product tank, wherein a first feeding pipeline is fixedly communicated with an inlet of the cation exchange resin fixed bed, a second feeding 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 third feeding pipeline is fixedly communicated between an outlet of the anion exchange resin fixed bed and an inlet of the membrane device, a first discharging pipeline is fixedly communicated between an outlet of a membrane interception side of the membrane device and an inlet of the first storage tank, a second discharging pipeline is fixedly communicated between an outlet of the upper portion of the first storage tank and an inlet of the second storage tank, a third discharging pipeline is fixedly communicated between an outlet of the second storage tank and the third feeding pipeline, a fourth discharging pipeline is fixedly communicated between an outlet of a membrane permeation side of the membrane device and an inlet of the product tank, and the outlet of the product tank is fixedly communicated with a fifth discharge pipeline.
2. The high-quality octamethylcyclotetrasiloxane production apparatus of claim 1, wherein the membrane apparatus comprises at least two membrane filters, each membrane filter being connected in series or in parallel, the membrane in each membrane filter being an oleophilic hydrophobic membrane.
3. The high-quality octamethylcyclotetrasiloxane production apparatus according to claim 1 or 2, characterized in that a transfer pump is fixedly installed on the third discharge line and the fifth discharge line.
4. The apparatus for producing high-quality octamethylcyclotetrasiloxane as in claim 1 or 2, wherein the outlets at the top of the first storage tank, the second storage tank and the product tank are all fixedly communicated with evacuation lines, and the outlets at the lower part of the first storage tank and the second storage tank are both fixedly communicated with drainage lines.
5. The apparatus for producing high-quality octamethylcyclotetrasiloxane as in claim 3, wherein the outlets of the top of the first storage tank, the second storage tank and the product tank are all fixedly connected with evacuation lines, and the outlets of the lower parts of the first storage tank and the second storage tank are both fixedly connected with drainage lines.
6. The apparatus for producing high-quality octamethylcyclotetrasiloxane as in claim 4, wherein flow control valves are fixedly installed on the first feed line, the second feed line and the fourth discharge line, a flow control valve is fixedly installed on the third feed line between the anion exchange resin fixed bed and the third discharge line, valves are respectively fixedly installed on the first feed line corresponding to the left and right sides of the flow control valve on the first feed line, valves are respectively fixedly installed on the second feed line corresponding to the left and right sides of the flow control valve on the second feed line, valves are respectively fixedly installed on the third feed line corresponding to the left and right sides of the flow control valve on the third feed line, valves are respectively fixedly installed on the fourth discharge line corresponding to the left and right sides of the flow control valve on the fourth discharge line, a valve is respectively installed on the fourth discharge line corresponding to the left and right sides of the delivery pump on the third discharge line, Valves are fixedly arranged on the third discharging pipes on the right two sides, valves are fixedly arranged on the fifth discharging pipes corresponding to the left and right sides of the conveying pump on the fifth discharging pipe, and valves are fixedly arranged on the emptying pipe and the liquid discharging pipe.
7. The apparatus for producing high-quality octamethylcyclotetrasiloxane as in claim 5, wherein flow control valves are fixedly installed on the first feed line, the second feed line and the fourth discharge line, a flow control valve is fixedly installed on the third feed line between the anion exchange resin fixed bed and the third discharge line, valves are respectively fixedly installed on the first feed line corresponding to the left and right sides of the flow control valve on the first feed line, valves are respectively fixedly installed on the second feed line corresponding to the left and right sides of the flow control valve on the second feed line, valves are respectively fixedly installed on the third feed line corresponding to the left and right sides of the flow control valve on the third feed line, valves are respectively fixedly installed on the fourth discharge line corresponding to the left and right sides of the flow control valve on the fourth discharge line, a valve is respectively installed on the fourth discharge line corresponding to the left and right sides of the delivery pump on the third discharge line, Valves are fixedly arranged on the third discharging pipes on the right two sides, valves are fixedly arranged on the fifth discharging pipes corresponding to the left and right sides of the conveying pump on the fifth discharging pipe, and valves are fixedly arranged on the emptying pipe and the liquid discharging pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122082696.5U CN215743489U (en) | 2021-08-31 | 2021-08-31 | High-quality octamethylcyclotetrasiloxane apparatus for producing |
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| CN202122082696.5U CN215743489U (en) | 2021-08-31 | 2021-08-31 | High-quality octamethylcyclotetrasiloxane apparatus for producing |
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| CN215743489U true CN215743489U (en) | 2022-02-08 |
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| CN202122082696.5U Active CN215743489U (en) | 2021-08-31 | 2021-08-31 | High-quality octamethylcyclotetrasiloxane apparatus for producing |
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