CN220803139U - High-boiling-point cracking reaction system with side line extraction device - Google Patents
High-boiling-point cracking reaction system with side line extraction device Download PDFInfo
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- CN220803139U CN220803139U CN202322300267.XU CN202322300267U CN220803139U CN 220803139 U CN220803139 U CN 220803139U CN 202322300267 U CN202322300267 U CN 202322300267U CN 220803139 U CN220803139 U CN 220803139U
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 26
- 238000000605 extraction Methods 0.000 title claims abstract description 20
- 238000005336 cracking Methods 0.000 title claims description 41
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 238000009835 boiling Methods 0.000 claims abstract description 60
- 239000000126 substance Substances 0.000 claims abstract description 30
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 14
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000197 pyrolysis Methods 0.000 claims abstract description 11
- 238000003776 cleavage reaction Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000178 monomer Substances 0.000 description 13
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 229910008045 Si-Si Inorganic materials 0.000 description 3
- 229910006411 Si—Si Inorganic materials 0.000 description 3
- YGZSVWMBUCGDCV-UHFFFAOYSA-N chloro(methyl)silane Chemical compound C[SiH2]Cl YGZSVWMBUCGDCV-UHFFFAOYSA-N 0.000 description 3
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 230000007017 scission Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000001983 dialkylethers Chemical class 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model discloses a high-boiling pyrolysis reaction system with a side line extraction device, which comprises a pyrolysis kettle, wherein the feed end of the pyrolysis kettle is respectively connected with a catalyst pipe, a high-boiling-point substance feed pipe and a hydrogen chloride pipe, the top outlet of the pyrolysis kettle is connected with the bottom of a rectifying tower, a liquid collector is arranged in the rectifying tower, the liquid outlet of the liquid collector is connected with one end of the side line extraction pipe, and the other end of the side line extraction pipe penetrates out of the side part of the rectifying tower; the utility model can improve the high-boiling treatment capacity, recycle the low-boiling-range high-boiling-point substances and effectively avoid the problems of resource waste and environmental protection.
Description
Technical Field
The utility model relates to the technical field of organosilicon production, in particular to a high-boiling cracking reaction system with a side line extraction device.
Background
The high-boiling-point substances are silane and alkoxy alkane mixtures with boiling points higher than that of dimethyl dichlorosilane (more than 70.2 ℃), colorless or brownish black liquid, the boiling range is 80-215 ℃, and only part of the mixture participates in the cracking reaction: under the action of catalyst (N, N-dimethylaniline), hydrogen chloride is used to crack disilane containing Si-Si bond in the high-boiling residue to generate methyl chlorosilane monomer. In order to separate the product from the high boiling point reaction, catalyst and non-high boiling point reaction, a rectifying tower is arranged at the upper part of the cracking kettle to carry out rectification separation on the mixed monomer product and other materials. Because only part of high-boiling matters participate in the cracking reaction, unreacted high-boiling matters and the like are enriched in the kettle to occupy the capacity of the cracking kettle, and high-boiling residual liquid needs to be discharged periodically. The unreacted high-boiling-point substances contain low-boiling-point substances, the boiling point of the low-boiling-point substances is different from that of the dimethyl by only 10 ℃, and the mixed monomer products are all distilled from a cracking kettle to a rectifying tower, and the high-boiling-point content in the mixed monomer at the top of the rectifying tower is less than 5% after rectification, 70% -90% of the bottom of the rectifying tower is the low-boiling-point high-boiling-point substances, and 10% -30% of the mixed monomer products. Because the bottom of the rectifying tower is not provided with a kettle liquid collecting device, the rectifying tower is directly connected with the cracking kettle through an expansion joint, low-boiling-point high-boiling-point substances and a small amount of mixed monomer products directly flow back to the cracking kettle, occupy the volume of the cracking kettle and limit the high-boiling-point processing capacity. The low boiling point high boiling point substances can be sold as products, and the low boiling point substances are returned to the cracking kettle to be discharged as high boiling point residual liquid, so that not only is certain economic loss caused, but also the residual liquid treatment capacity is increased, more smoke is generated during hydrolysis, and the environment-friendly idea is not good.
Disclosure of utility model
The utility model aims to overcome the defects and provide a high-boiling-point cracking reaction system with a side line extraction device, which can improve the high-boiling-point processing capacity, recycle low-boiling-range high-boiling-point substances and effectively avoid the problems of resource waste and environmental protection.
The utility model aims to solve the technical problems, and adopts the technical scheme that: the utility model provides a take high boiling cleavage reaction system of side stream extraction device, includes the pyrolysis kettle, the pyrolysis kettle feed end is connected with catalyst tube, high boiling substance inlet pipe and hydrogen chloride pipe respectively, and pyrolysis kettle top export is connected with rectifying column bottom, install the liquid trap in the rectifying column, the liquid outlet and the side stream extraction pipe one end of liquid trap are connected, and the rectifying column lateral part is worn out to the side stream extraction pipe other end.
Preferably, an expansion joint is further arranged between the top outlet of the cracking kettle and the bottom of the rectifying tower.
Preferably, a liquid collector is mounted on the top of the expansion joint.
Preferably, a liquid collector is arranged between adjacent packing materials in the rectifying tower.
Preferably, the liquid collector comprises a liquid collecting plate, a baffle ring is arranged at the outer edge of the liquid collecting plate, a plurality of liquid collecting pipes uniformly penetrate through the surface of the liquid collecting plate, the bottom of each liquid collecting pipe is open, the top of each liquid collecting pipe is closed, a through hole is formed in the side wall of each liquid collecting pipe, which is located above the liquid collecting plate, a liquid outlet is formed in the central area of the liquid collecting plate, and the bottom of each liquid outlet is connected with one end of a side line extraction pipe.
Preferably, the bottom of the liquid collecting plate is also provided with a supporting rod.
The utility model has the beneficial effects that:
1. The utility model collects the low boiling point high boiling point substances and the mixed monomer products by the liquid collector to obtain the side stream, can improve the high boiling point treatment capacity, and can recycle the low boiling point range high boiling point substances, thereby effectively avoiding the problems of resource waste and environmental protection.
2. The components of the high-boiling substances are complex, the high-boiling substances which can participate in the cracking reaction are about 70%, the unreacted high-boiling substances are enriched in the cracking kettle along with the increase of the feeding quantity, occupy the volume of the cracking kettle, cannot continue feeding production, and after the liquid collector is added for side line extraction, part of unreacted high-boiling substances are extracted out of the kettle through the liquid collector, so that the utilization rate of the cracking kettle is improved, and the boiling treatment capacity is improved.
3. After the side stream is increased, the recovered unreacted low-boiling-range high-boiling-point substances can be sold as high-boiling-point products, so that the hydrolysis treatment capacity of the high-boiling-point residual liquid is reduced, the value is created, the hydrolysis cost is reduced, and the economic benefit is created.
Drawings
FIG. 1 is a high boiling cleavage reaction system with a side draw;
Fig. 2 is a schematic perspective view of a liquid trap;
Fig. 3 is a schematic perspective view of another view of fig. 2.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the specific examples.
As shown in fig. 1 to 3, a high-boiling-point cracking reaction system with a side line extraction device comprises a cracking kettle 1, wherein the feeding end of the cracking kettle 1 is respectively connected with a catalyst pipe 2, a high-boiling-point substance feeding pipe 3 and a hydrogen chloride pipe 4, the outlet at the top of the cracking kettle 1 is connected with the bottom of a rectifying tower 5, a liquid collector 6 is arranged in the rectifying tower 5, a liquid outlet 6.1 of the liquid collector 6 is connected with one end of a side line extraction pipe 8, and the other end of the side line extraction pipe 8 penetrates out of the side part of the rectifying tower 5.
Preferably, an expansion joint 7 is further arranged between the outlet at the top of the cracking kettle 1 and the bottom of the rectifying tower 5.
Preferably, the expansion joint 7 is provided with a liquid collector 6 at the top.
Preferably, a liquid collector 6 is installed between adjacent packing materials in the rectifying tower 5.
Preferably, the liquid collector 6 comprises a liquid collecting plate 6.2, a baffle ring 6.3 is arranged at the outer edge of the liquid collecting plate 6.2, a plurality of liquid collecting pipes 6.4 uniformly penetrate through the surface of the liquid collecting plate 6.2, the bottom of each liquid collecting pipe 6.4 is open, the top of each liquid collecting pipe is closed, a through hole 6.5 is formed in the side wall of each liquid collecting pipe 6.4 above the liquid collecting plate 6.2, a liquid outlet 6.1 is formed in the central area of the liquid collecting plate 6.2, and the bottom of each liquid outlet 6.1 is connected with one end of a side line extraction pipe 8. In this embodiment, the low boiling point high boiling point substances and the mixed monomer products are condensed into liquid after passing upwards from the liquid collecting pipe 6.4, and fall onto the surface of the liquid collecting plate 6.2 from the through holes 6.5, and then enter the side extraction pipe 8 from the liquid outlet 6.1, thereby realizing the extraction process.
Preferably, a supporting rod 6.6 is further arranged at the bottom of the liquid collecting plate 6.2. The whole liquid collector 6 can be conveniently placed and installed by arranging the supporting rods 6.6.
In the embodiment, the mass ratio of the high boiling point substance in the high boiling point substance feeding pipe 3 to the catalyst N, N-dimethylaniline in the catalyst pipe 2 is 1:1 to 3 percent of the hydrogen chloride gas is put into the cracking kettle 1, and the dosage of the hydrogen chloride gas put into the hydrogen chloride pipe 4 is controlled to be about 40Nm 3/h and is introduced into the cracking kettle 1; through a cracking reaction, hydrogen chloride enables disilane containing Si-Si bonds in the high-boiling residue to crack, si-H bonds and Si-Cl bonds are formed, and a new methyl chlorosilane monomer is produced; methyl chlorosilane mixed monomers and high-boiling-point substances with low boiling ranges generated in the cracking kettle 1 are heated and steamed to a rectifying tower 5, condensed and discharged through a condenser to a reflux tank, one part of the mixed monomers in the reflux tank are subjected to reflux and gas phase heat and mass transfer rising in the rectifying tower 5 to carry out crude rectification, and the other part of the mixed monomers are extracted; a liquid collector 6 is arranged at the top of the expansion joint 7 or between adjacent fillers, and the low-boiling point high-boiling point substances and mixed monomer products are collected through the liquid collector 6 and then are extracted from a side extraction pipe 8.
The catalyst N, N-dimethylaniline can reduce the activation energy required by the reaction in the cracking reaction, improve the reaction rate, and the mass ratio of the high-boiling-point substances to the catalyst N, N-dimethylaniline is 1: 1-3%, the reaction rate cannot be obviously improved due to excessive addition of the catalyst, and the viscosity of the high-boiling residual liquid in the cracking kettle can be increased due to excessive use of the catalyst, so that slag discharge is difficult, and the difficulty in treating the high-boiling residual liquid can be increased.
When the content of disilane containing Si-Si bonds in the high-boiling residue is higher, the reaction rate can be improved by properly increasing the hydrogen chloride consumption, the reaction rate can not be obviously improved by excessively increasing the hydrogen chloride consumption, the hydrogen chloride is excessively introduced, the excessive discharge of a cracking device is caused by the hydrogen chloride which does not participate in the reaction, and the pressure in the kettle is increased to generate a large amount of loss.
The reaction temperature of the high-boiling-point cracking reaction system is controlled to be 100-160 ℃, the high-boiling-point substances are intermittently fed, the liquid level of the cracking kettle is controlled to be 1000-3000 mm, and the top pressure is controlled to be 20-45 KPa.
Example 1:
The organic silicon high-boiling-point substance and the catalyst N, N-dimethylaniline are mixed according to the mass ratio of 1:1 to 3 percent of the catalyst is added into a high-boiling-point substance cracking reaction system, the liquid level of a cracking kettle is controlled to be 1000 to 3000mm, the reaction temperature is 100 to 160 ℃, the using amount of hydrogen chloride gas is controlled to be about 40Nm 3/h, and the top pressure of the cracking kettle is controlled to be 20 to 45KPa. High boiling cleavage yield consumption (statistical period of one month): the consumption of high-boiling residue is 203.772t, the catalyst addition ratio is 1.25%, and the treatment amount of high-boiling residual liquid is 44t.
Example 2:
other implementation conditions are as same as 1, a liquid collector is connected to the joint of the middle part of the cracking reaction system, the cracking kettle and the rectifying tower, and the liquid in the cracking tower is collected. High boiling cleavage yield consumption (statistical period of one month): the consumption of high-boiling residue is 280.166t, the adding proportion of the catalyst is 0.72%, and the treatment amount of the high-boiling residue is 28t; in comparative example 1, the consumption of high boiling residue was increased by 76.394t and the treatment amount of high boiling residue was decreased by 16t.
Example 3:
And other implementation conditions are as same as 1, a liquid collector is arranged between a first layer of packing and a second layer of packing at the bottom of the rectifying tower of the cracking reaction system, and the bottom liquid of the cracking tower is collected. High boiling cleavage yield consumption (statistical period of one month): the consumption of high-boiling residue is 290.977t, the adding proportion of the catalyst is 0.68%, and the treatment amount of the high-boiling residue is 32t; in comparative example 1, the consumption of high boiling residue was increased by 87.205t and the treatment amount of high boiling residue was decreased by 12t.
The above embodiments are merely preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the embodiments and features of the embodiments of the present utility model may be arbitrarily combined with each other without collision. The protection scope of the present utility model is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.
Claims (6)
1. The utility model provides a take high boiling pyrolysis reaction system of side line extraction device, includes pyrolysis kettle (1), pyrolysis kettle (1) feed end is connected with catalyst tube (2), high boiling substance inlet pipe (3) and hydrogen chloride pipe (4) respectively, and pyrolysis kettle (1) top export is connected with rectifying column (5) bottom, its characterized in that: the rectifying tower (5) is internally provided with a liquid collector (6), a liquid outlet (6.1) of the liquid collector (6) is connected with one end of a side offtake pipe (8), and the other end of the side offtake pipe (8) penetrates out of the side part of the rectifying tower (5).
2. The high-boiling cleavage reaction system with side-draw apparatus as claimed in claim 1, wherein: an expansion joint (7) is arranged between the top outlet of the cracking kettle (1) and the bottom of the rectifying tower (5).
3. The high-boiling cleavage reaction system with side-draw apparatus as claimed in claim 2, wherein: the top of the expansion joint (7) is provided with a liquid collector (6).
4. The high-boiling cleavage reaction system with side-draw apparatus as claimed in claim 1, wherein: and a liquid collector (6) is arranged between adjacent fillers in the rectifying tower (5).
5. The high-boiling cleavage reaction system with side-draw apparatus as claimed in claim 1, wherein: the liquid collector is characterized in that the liquid collector (6) comprises a liquid collecting plate (6.2), a baffle ring (6.3) is arranged on the outer edge of the liquid collecting plate (6.2), a plurality of liquid collecting pipes (6.4) uniformly penetrate through the surface of the liquid collecting plate (6.2), the bottom of each liquid collecting pipe (6.4) is open, the top of each liquid collecting pipe is closed, a through hole (6.5) is formed in the side wall of each liquid collecting pipe (6.4) above the liquid collecting plate (6.2), a liquid outlet (6.1) is formed in the central area of the liquid collecting plate (6.2), and the bottom of each liquid outlet (6.1) is connected with one end of a side line collecting pipe (8).
6. The high-boiling cleavage reaction system with side-draw apparatus as recited in claim 5, wherein: the bottom of the liquid collecting plate (6.2) is also provided with a supporting rod (6.6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322300267.XU CN220803139U (en) | 2023-08-25 | 2023-08-25 | High-boiling-point cracking reaction system with side line extraction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322300267.XU CN220803139U (en) | 2023-08-25 | 2023-08-25 | High-boiling-point cracking reaction system with side line extraction device |
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| CN220803139U true CN220803139U (en) | 2024-04-19 |
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| CN202322300267.XU Active CN220803139U (en) | 2023-08-25 | 2023-08-25 | High-boiling-point cracking reaction system with side line extraction device |
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- 2023-08-25 CN CN202322300267.XU patent/CN220803139U/en active Active
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