CN203513290U - System for producing trichlorosilane by anti-disproportionation reaction of dichlorosilane - Google Patents
System for producing trichlorosilane by anti-disproportionation reaction of dichlorosilane Download PDFInfo
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- CN203513290U CN203513290U CN201320606710.XU CN201320606710U CN203513290U CN 203513290 U CN203513290 U CN 203513290U CN 201320606710 U CN201320606710 U CN 201320606710U CN 203513290 U CN203513290 U CN 203513290U
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Abstract
The utility model belongs to the technical field of the chemical industry and relates to a system for producing trichlorosilane by anti-disproportionation reaction of dichlorosilane and in particular relates to a system for generating trichlorosilane by anti-disproportionation reaction of dichlorosilane, namely a byproduct generated in a trichlorosilane production process. The system is characterized in that a light component rectifying column is communicated with a light component storage tank, a first filter, a first power pump and a mixer in sequence; a silicon tetrachloride storage tank is communicated with a second filter, a second power pump and the mixer in sequence; the mixer is communicated with a fixed bed reaction column via a heater and a basket filter in sequence; the fixed bed reaction column is communicated with a synthetic fluid storage tank via a first cooler and a second cooler in sequence; the synthetic fluid storage tank is communicated with a third-level rectifying column. The system enables liquid dichlorosilane to participate in reaction so as to save the production cost, increase the reaction rate and reduce the potential safety hazards.
Description
Technical field
The invention belongs to chemical technology field, relate to the system that the anti-disproportionation reaction of a kind of dichloro-dihydro silicon is produced trichlorosilane, relate in particular to the system that the anti-disproportionation reaction of the byproduct dichloro-dihydro silicon producing in a kind of production process of trichlorosilane generates trichlorosilane.
Background technology
At present, the trichlorosilane production technique that China enterprise adopts is commonly improved Siemens, when producing trichlorosilane, is attended by 5 ~ 7% light constituent generation, and its main component is dichloro-dihydro silicon.Because the generation of dichloro-dihydro silicon causes every ten thousand tons of trichlorosilane finished products by the trichlorosilane work in-process (light constituent) that slattern more than 600 tons.Dichloro-dihydro silicon boiling point only has 8.2 ° of C, 58 ° of C of spontaneous ignition temperature, with after air mixed in very wide scope equal explosibilities, there is great danger.And dichloro-dihydro silicon is to exist with gaseous form under normal temperature, participating in reaction directly can affect speed of reaction.
This part light constituent is owing to containing dangerously explosive dichloro-dihydro silicon, Shi Bei manufacturing enterprise is directly discharged into elution device processing at first, there is afterwards the more advanced anti-disproportionation reaction technique of indivedual enterprises Introduced From Abroad, dichloro-dihydro silicon is carried out to anti-disproportionation reaction and again produce trichlorosilane, and this technological reaction carries out under gas, liquid status, speed of response is slower, affects speed of reaction, and the dichloro-dihydro silicon under gaseous state is more dangerous, and potential safety hazard is still larger.
Summary of the invention
For improving the recycling of by product dichloro-dihydro silicon in production process of trichlorosilane, to reach, reduce trichlorosilane production cost, reduce the wasting of resources, stop potential safety hazard, realize the object of cleaner production, the present invention utilizes anti-disproportionation reaction that dichloro-dihydro silicon is converted into trichlorosilane, then light constituent is reclaimed and becomes trichlorosilane finished product.
The utility model is by the following technical solutions:
The system that the anti-disproportionation reaction of a kind of dichloro-dihydro silicon is produced trichlorosilane, comprise light constituent rectifying tower, light constituent basin, silicon tetrachloride basin, strainer, power-driven pump, mixing tank, well heater, fixed bed reaction tower, water cooler, synthetic liquid storage tank and three grades of rectifying tower, described light constituent rectifying tower is communicated with light constituent basin successively, the first strainer, the first power-driven pump and mixing tank, described silicon tetrachloride basin is communicated with the second strainer successively, the second power-driven pump and mixing tank, described mixing tank passes through well heater more successively, blue formula strainer is communicated with fixed bed reaction tower, fixed bed reaction tower is more successively through the first water cooler, the second water cooler is communicated with synthetic liquid storage tank, described synthetic liquid storage tank is communicated with three grades of rectifying tower again.
The system of producing trichlorosilane according to the anti-disproportionation reaction of above-mentioned dichloro-dihydro silicon, described the first water cooler is 5 ° of C watercoolers, the second water cooler is-35 ° of C watercoolers.
The system of producing trichlorosilane according to the anti-disproportionation reaction of above-mentioned dichloro-dihydro silicon, described blue formula strainer is the blue formula strainers of 200 orders.
The system of producing trichlorosilane according to the anti-disproportionation reaction of above-mentioned dichloro-dihydro silicon, described fixed-bed type reaction tower inside is filled with resin catalyst.
positive beneficial effect of the present utility model:
The utility model makes liquid dichloro-dihydro silicon participate in reaction, can save production cost, and improves speed of reaction, reduces potential safety hazard.The utility model adopts fixed-bed type reaction tower, and tower inside is filled with resin catalyst, and anti-disproportionation reaction occurs for dichloro-dihydro silicon and silicon tetrachloride under certain condition, generates trichlorosilane products.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment 1 schematic diagram.
In figure 1, light constituent rectifying tower, 2, light constituent basin, the 3, first strainer, 4, the first power-driven pump, 5, silicon tetrachloride basin, the 6, second strainer, 7, the second power-driven pump, 8, mixing tank, 9, well heater, 10, the blue formula strainer of 200 orders, 11, fixed bed reaction tower, the 12, first water cooler, the 13, second water cooler, 14, synthetic liquid storage tank, 15, three grades of rectifying tower.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the utility model is further described, but the utility model is not limited to these embodiment.
embodiment 1
The system that the anti-disproportionation reaction of the present embodiment dichloro-dihydro silicon is produced trichlorosilane, comprise light constituent rectifying tower, light constituent basin, silicon tetrachloride basin, first, the second strainer, first, the second power-driven pump, mixing tank, well heater, the blue formula strainer of 200 orders, fixed bed reaction tower, first, the second water cooler, synthetic liquid storage tank and three grades of rectifying tower, described light constituent rectifying tower is communicated with light constituent basin successively, the first strainer, the first power-driven pump and mixing tank, described silicon tetrachloride basin is communicated with the second strainer successively, the second power-driven pump and mixing tank, described mixing tank passes through well heater more successively, the blue formula strainer of 200 orders is communicated with fixed bed reaction tower, tower inside is filled with resin catalyst, fixed bed reaction tower is more successively through the first water cooler, the second water cooler is communicated with synthetic liquid storage tank, described synthetic liquid storage tank is communicated with three grades of rectifying tower again.Described the first water cooler is 5 ° of C watercoolers, and the second water cooler is-35 ° of C watercoolers.
Under production status, first light constituent passes through rectifying, and the dichloro-dihydro silicon concentration in light constituent is brought up to 50% left and right, is stored in light constituent basin standby.Meanwhile, purity is greater than 99.5% silicon tetrachloride and is stored in silicon tetrachloride basin standby.Then, both are filtered respectively and with power-driven pump, are squeezed in mixing tank afterwards, heater via is heated to 50 ~ 70 ° of C again, through the blue formula strainer of 200 orders, filter, enter anti-disproportionation reaction tower reaction, 40 ~ 70 ° of C of temperature of reaction of reactor, pressure 0.4 ~ 0.7MPa, from anti-disproportionation reaction tower, in the synthetic liquid of extraction, the transformation efficiency of dichloro-dihydro silicon has reached more than 98%, reacted synthetic liquid enters synthetic liquid storage tank through water cooler condensation, then enter rectifying in three grades of rectifying tower, isolate trichlorosilane finished product.
The utility model is not limited to above-mentioned embodiment, and those skilled in the art also can make multiple variation accordingly, but any and the utility model are equal to or similarly change and all should be encompassed in the scope of the utility model claim.
Claims (4)
1. the system that the anti-disproportionation reaction of a dichloro-dihydro silicon is produced trichlorosilane, it is characterized in that: comprise light constituent rectifying tower, light constituent basin, silicon tetrachloride basin, strainer, power-driven pump, mixing tank, well heater, fixed bed reaction tower, water cooler, synthetic liquid storage tank and three grades of rectifying tower, described light constituent rectifying tower is communicated with light constituent basin successively, the first strainer, the first power-driven pump and mixing tank, described silicon tetrachloride basin is communicated with the second strainer successively, the second power-driven pump and mixing tank, described mixing tank passes through well heater more successively, blue formula strainer is communicated with fixed bed reaction tower, fixed bed reaction tower is more successively through the first water cooler, the second water cooler is communicated with synthetic liquid storage tank, described synthetic liquid storage tank is communicated with three grades of rectifying tower again.
2. the system that the anti-disproportionation reaction of dichloro-dihydro silicon is produced trichlorosilane according to claim 1, is characterized in that: described the first water cooler is 5 ° of C watercoolers, the second water cooler is-35 ° of C watercoolers.
3. the system that the anti-disproportionation reaction of dichloro-dihydro silicon is produced trichlorosilane according to claim 1, is characterized in that: described blue formula strainer is the blue formula strainers of 200 orders.
4. the system that the anti-disproportionation reaction of dichloro-dihydro silicon is produced trichlorosilane according to claim 1, is characterized in that: described fixed-bed type reaction tower inside is filled with resin catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606710.XU CN203513290U (en) | 2013-09-29 | 2013-09-29 | System for producing trichlorosilane by anti-disproportionation reaction of dichlorosilane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606710.XU CN203513290U (en) | 2013-09-29 | 2013-09-29 | System for producing trichlorosilane by anti-disproportionation reaction of dichlorosilane |
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| CN203513290U true CN203513290U (en) | 2014-04-02 |
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| CN201320606710.XU Expired - Fee Related CN203513290U (en) | 2013-09-29 | 2013-09-29 | System for producing trichlorosilane by anti-disproportionation reaction of dichlorosilane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045087A (en) * | 2014-06-13 | 2014-09-17 | 陕西天宏硅材料有限责任公司 | Device for preparing trichlorosilane |
| CN104760959A (en) * | 2015-04-08 | 2015-07-08 | 湖北晶星科技股份有限公司 | Process for preparing trichlorosilane by virtue of disproportionation method |
-
2013
- 2013-09-29 CN CN201320606710.XU patent/CN203513290U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045087A (en) * | 2014-06-13 | 2014-09-17 | 陕西天宏硅材料有限责任公司 | Device for preparing trichlorosilane |
| CN104045087B (en) * | 2014-06-13 | 2017-01-04 | 陕西天宏硅材料有限责任公司 | Prepare the device of trichlorosilane |
| CN104760959A (en) * | 2015-04-08 | 2015-07-08 | 湖北晶星科技股份有限公司 | Process for preparing trichlorosilane by virtue of disproportionation method |
| CN104760959B (en) * | 2015-04-08 | 2017-01-04 | 湖北晶星科技股份有限公司 | The technique that a kind of anti-discrimination method prepares trichlorosilane |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20150929 |
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| EXPY | Termination of patent right or utility model |