CN204017839U - A kind of alkylation reaction still - Google Patents
A kind of alkylation reaction still Download PDFInfo
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- CN204017839U CN204017839U CN201420451323.8U CN201420451323U CN204017839U CN 204017839 U CN204017839 U CN 204017839U CN 201420451323 U CN201420451323 U CN 201420451323U CN 204017839 U CN204017839 U CN 204017839U
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Abstract
A kind of alkylation reaction still belongs to chemical reaction equipment technical field, is specifically related to a kind of reactor being applied to alkylation reaction.The utility model provides a kind of isobutene to be evenly distributed, economize energy, is convenient to the alkylation reaction still of control temperature.The feature that the utility model comprises is: cylindrical shell Lower Half and lower surface coiling are provided with Steam Heating semicanal, and described drum surface is positioned at coiling above Steam Heating semicanal and is provided with circulating water cooling semicanal; Be provided with cooling inner coil pipe in described cylindrical shell, described shaft is arranged at the center of described cooling inner coil pipe; Described cylindrical shell is provided with phenol charge door and isobutene charge door, side, cylindrical shell top is provided with catalyst and adds entrance; Described isobutene charge door is connected with the bottom insert canal near barrel in cylindrical shell, and the lower end of bottom insert canal is provided with the isobutene distributor of helix, and isobutene distributor is evenly equipped with through hole; Described isobutene distributor is corresponding with described paddle.
Description
Technical field
The utility model belongs to chemical reaction equipment technical field, is specifically related to a kind of reactor being applied to alkylation reaction.
Background technology
As everyone knows, alkylphenol refers to the compound that the hydrogen atom on phenol ring is obtained by one or more identical or different alkyl replacement, it is the primary raw material manufacturing various phenolic resins, nonionic surface active agent, various polymeric additive, and it is also used as the antioxidant producing rubber antioxidant and plastics.
Generally adopting phenol, cresols or xylenol and various olefine reaction in industrial production, by adopting different catalyst to locate, producing different alkane phenol phenol.
With 2,6-DI-tert-butylphenol compounds (being called for short 26-phenol) is example, and its alkylation reaction production process can be expressed as: first add a small amount of phenol and a certain amount of aluminium bits in alkylation reaction still, under certain condition, aluminium bits generate phenol aluminium with phenol reactant, and it is the catalyst of this alkylation reaction.
Afterwards, the disposable phenol added required for a still reaction, the isobutene passing into aequum within a certain period of time carries out alkylated reaction.In this course of reaction, the control that reaction temperature, isobutene lead to the distribution consistency degree of alkene speed and slotting bottom outlet isobutene thereof is very important, and too low reaction temperature reaction is incomplete, and too high reaction temperature causes accessory substance to increase, and energy ezpenditure increases.And isobutene skewness, bubble conference reduces the contact surface area of isobutene and phenol, and a large amount of isobutenes comes together in liquid surface, causes pressure in still to increase, and the reaction time increases.Therefore, the form of the heat supply of alkylation reaction still, cooling and distributor is very crucial to reaction temperature control, reaction time, energy conservation.
The heat supply of existing alkylation reaction still, what adopt is the outer semicanal heating type Steam Heating of alkanisation still material section entirety, this heat-supplying mode has a few point defect for the alkylation reaction of 26-phenol: 1. during catalyst preparing, phenol input amount is only one of ten of required phenol amount or less, reaction temperature reaches as high as 170 DEG C, institute's calorific requirement is accompanied by the outer semicanal of entirety and is provided, most bringing-up section is on material surface, the phenol of vaporization contacts with heating adjoining pipe more than material and cannot turn back in material, it is larger that temperature controls difficulty, and cool frequently, heat up and consume a large amount of steam energies, 2. after catalyst preparing, the phenol needed for a still is first added, in uniform temperature and start continuously logical isobutene in the time and carry out alkylation reaction.This reaction has the high feature of reaction pressure, requires that maximum pressure is less than 1.2Mpa, and the liquid level of material in still, along with the increase of logical alkene time is risen gradually.In initial reaction stage, most heat tracing pipe is more than material liquid surface, pass into after in still, unreacted phenol, isobutene contact with heat tracing pipe, more can increase its pressure, reach as high as more than 1.5Mpa, there is temperature equally and control shakiness and cool frequently to heat up to consume the phenomenon of a large amount of energy.
In addition, existing alkylation reaction still, isobutene is directly entered at the bottom of still by the isobutene bottom insert canal outlet of bottom, due to skewness, the contact surface area of isobutene and phenol is little, a large amount of isobutenes rises to liquid surface with the form of bubble by the bottom of still, and cause pressure in still to increase, the reaction time increases.
Summary of the invention
The utility model is exactly for the problems referred to above, provides a kind of isobutene to be evenly distributed, economize energy, is convenient to the alkylation reaction still of control temperature.
For realizing above-mentioned purpose of the present utility model, the utility model adopts following technical scheme, the utility model comprises cylindrical shell, cylindrical shell upper end is provided with stirring transmission system, be provided with in cylindrical shell and the shaft stirring transmission system and be connected, the end of shaft is provided with paddle, cylinder body bottom is provided with discharging opening, it is characterized in that: described cylindrical shell Lower Half and lower surface coiling are provided with Steam Heating semicanal, described drum surface is positioned at coiling above Steam Heating semicanal and is provided with circulating water cooling semicanal; Be provided with cooling inner coil pipe in described cylindrical shell, described shaft is arranged at the center of described cooling inner coil pipe; Described cylindrical shell is provided with phenol charge door and isobutene charge door, side, cylindrical shell top is provided with catalyst and adds entrance; Described isobutene charge door is connected with the bottom insert canal near barrel in cylindrical shell, and the lower end of bottom insert canal is provided with the isobutene distributor of helix, and isobutene distributor is evenly equipped with through hole; Described isobutene distributor is corresponding with described paddle.
As a kind of preferred version of the present utility model, described isobutene distributor is set to the high helix tube in low outside, center.
As another kind of preferred version of the present utility model, the upper end of described Steam Heating semicanal is air intake, and one end that Steam Heating semicanal is positioned at cylinder body bottom is set to venthole; The upper end of described circulating water cooling semicanal is set to recirculated water entrance, and the lower end of circulating water cooling semicanal is set to circulating water outlet; The cooling import of described cooling inner coil pipe is arranged at the side of the cylindrical shell first half; The cooling outlet of described cooling inner coil pipe is arranged at cylinder body bottom.
The beneficial effects of the utility model: owing to have employed technique scheme, on the downside of cylindrical shell, Steam Heating semicanal carries out heating to cylindrical shell Lower Half and ensure that reaction institute calorific requirement, on the upside of cylindrical shell circulating water cooling semicanal carry out lowering the temperature ensure that vaporization phenol, after isobutene contact cylinder inboard wall, be cooled to liquid rapidly, make pressure in cylindrical shell keep stable, be easy to the control to pressure in cylindrical shell and temperature; And cooled liquid can participate in the middle of reaction further, improve reaction efficiency; Cooling inner coil pipe in cylindrical shell passes into recirculated cooling water and ensure that the greenhouse cooling of overall material controls, and isobutene is uniformly distributed in reactant liquor by isobutene distributor effectively that newly increase, accelerates reaction speed, shortens the reaction time.
The utility model effectively can control the temperature of material in still.Use of the present utility model improves the temperature controlled precision of course of reaction, reduces control difficulty, the conversion ratio that improve reactant liquor and yield, and reduces the consumption of steam.
In addition, by isobutene distributor being set to the high helix tube in low outside, center, because it is corresponding with paddle, when isobutene is joined in cylindrical shell by the through hole of helix tube, the liquid that paddle stirs can better mix with isobutene, improves reaction efficiency further.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model isobutene distributor.
In accompanying drawing, 1 is venthole, 2 is discharging opening, 3 is cooling outlet, 4 is isobutene distributor, 5 is support, 6 is paddle, 7 is Steam Heating semicanal, 8 is shaft, 9 is circulating water outlet, 10 is bottom insert canal, 11 is circulating water cooling semicanal, 12 is air intake, 13 is recirculated water entrance, 14 is cooling inner coil pipe, 15 is cooling import, 16 add entrance for catalyst, 17 is cylindrical shell, 18 is manhole, 19 is isobutene charge door, 20 is phenol charge door, 21 for stirring transmission system, 22 is through hole.
Detailed description of the invention
The utility model comprises cylindrical shell 17, cylindrical shell 17 upper end is provided with stirs transmission system 21, be provided with in cylindrical shell 17 and the shaft 8 stirring transmission system 21 and be connected, the end of shaft 8 is provided with paddle 6, discharging opening 2 is provided with bottom cylindrical shell 17, it is characterized in that: described cylindrical shell 17 Lower Half and lower surface coiling are provided with Steam Heating semicanal 7, described cylindrical shell 17 surface is positioned at coiling above Steam Heating semicanal 7 and is provided with circulating water cooling semicanal 11; Be provided with cooling inner coil pipe 14 in described cylindrical shell 17, described shaft 8 is arranged at the center of described cooling inner coil pipe 14; Described cylindrical shell 17 is provided with phenol charge door 20 and isobutene charge door 19, side, cylindrical shell 17 top is provided with catalyst and adds entrance 16; Described isobutene charge door 19 is connected with the bottom insert canal 10 near barrel in cylindrical shell 17, and the lower end of bottom insert canal 10 is provided with the isobutene distributor 4 of helix, isobutene distributor 4 is evenly equipped with through hole 22; Described isobutene distributor 4 is corresponding with described paddle 6.
As a kind of preferred version of the present utility model, described isobutene distributor 4 is set to the high helix tube in low outside, center.
Described isobutene distributor 4 is provided with the support 5 be connected with cylindrical shell 17 inwall.
As another kind of preferred version of the present utility model, the upper end of described Steam Heating semicanal 7 is air intake 12, and Steam Heating semicanal 7 one end be positioned at bottom cylindrical shell 17 is set to venthole 1; The upper end of described circulating water cooling semicanal 11 is set to recirculated water entrance 13, and the lower end of circulating water cooling semicanal 11 is set to circulating water outlet 9; The cooling import 15 of described cooling inner coil pipe 14 is arranged at the side of cylindrical shell 17 first half; The cooling outlet 3 of described cooling inner coil pipe 14 is arranged at bottom cylindrical shell 17.
Manhole 18 is provided with above described cylindrical shell 17; Convenient operation personnel enter in cylindrical shell 17 and carry out keeping in repair and safeguarding.
Below in conjunction with accompanying drawing, one-off process of the present utility model is described: when the phenol needed for Kaolinite Preparation of Catalyst, aluminium bits to be added by phenol charge door 20, catalyst after in cylindrical shell 17 that entrance 16 joins alkylation reaction still, start stirring transmission system 21.By controlling the air intake 12 of Steam Heating semicanal 7 outside on the downside of cylindrical shell 17 and the aperture of venthole 1, control reaction temperature required.
Meanwhile, the phenol of vaporization is cooled by the aperture of the recirculated water entrance 13 and circulating water outlet 9 of being located at the circulating water cooling semicanal 11 on the upside of cylindrical shell 17.When reaction temperature is too high, is exported the aperture of 3 by the cooling of the cooling import 15 and cylindrical shell 17 bottom that control the cooling inner coil pipe 14 be located on the upside of cylindrical shell 17, by recirculated cooling water, temperature of charge is cooled in range of reaction temperature.
After catalyst preparing, phenol needed for one batch reaction is joined in alkylation reaction kettle barrel 17 by phenol charge door 20 is disposable, by controlling the air intake 12 of Steam Heating semicanal 7 outside on the downside of cylindrical shell 17 and the aperture of venthole 1, control reaction temperature required.
When temperature is too high, is exported the aperture of 3 by the cooling of the cooling import 15 and cylindrical shell 17 bottom that control the cooling inner coil pipe 14 be located on the upside of cylindrical shell 17, by recirculated cooling water, temperature of charge is cooled in range of reaction temperature.
At this moment start logical isobutene and carry out alkylation reaction.Before logical isobutene carries out alkylation reaction, because material liquid level in cylindrical shell 17 is lower and logical isobutene amount is more, have a large amount of isobutenes and part phenol is present in material top in cylindrical shell 17 with the form of gas, therefore, circulating water cooling semicanal 11 on the upside of cylindrical shell 17 is still in opening, to cool isobutene and the phenol of vaporization.
Isobutene is entered by the isobutene charge door 19 being located at cylindrical shell 17 upper cover, and the through hole 22 being located at cylindrical shell 17 inner bottom part isobutene distributor 4 through being connected with bottom insert canal 10 is discharged, reactant liquor in cylindrical shell 17 is entered into equably under the dispersed with stirring effect of paddle 6, in the presence of a catalyst, start to carry out alkylation reaction with phenol.
Along with the carrying out reacted and isobutene continuous print add, in cylindrical shell 17, material liquid surface constantly rises.When material liquid surface exceedes the Steam Heating semicanal 7 on the downside of cylindrical shell 17, reaction has not been very violent, and when temperature controls to tend towards stability, closes the circulating water cooling semicanal 11 on the upside of cylindrical shell 17.Afterwards, control to react temperature required by controlling cylindrical shell 17 outer Steam Heating semicanal 7.
When reaction temperature is too high, by the cooling import 15 and cooling outlet 3 aperture controlling cooling inner coil pipe 14, temperature of charge is controlled in range of reaction temperature.After reaction terminates, material is extruded by the discharging opening 2 be located at bottom reacting cylinder body 17, enters into next step operation.
Said process reaches the temperature accurately controlling alkylation reaction process and controls, reduces control difficulty, the conversion ratio that improve reactant liquor and yield, and reduces the consumption of steam.
Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.
Claims (5)
1. an alkylation reaction still, comprise cylindrical shell (17), cylindrical shell (17) upper end is provided with stirs transmission system (21), be provided with in cylindrical shell (17) and the shaft (8) stirring transmission system (21) and be connected, the end of shaft (8) is provided with paddle (6), cylindrical shell (17) bottom is provided with discharging opening (2), it is characterized in that: described cylindrical shell (17) Lower Half and lower surface coiling are provided with Steam Heating semicanal (7), described cylindrical shell (17) surface is positioned at the coiling of Steam Heating semicanal (7) top and is provided with circulating water cooling semicanal (11); Be provided with cooling inner coil pipe (14) in described cylindrical shell (17), described shaft (8) is arranged at the center of described cooling inner coil pipe (14); Described cylindrical shell (17) is provided with phenol charge door (20) and isobutene charge door (19), cylindrical shell (17) side, top is provided with catalyst and adds entrance (16); Be connected near the bottom insert canal (10) of barrel in the same cylindrical shell of described isobutene charge door (19) (17), the lower end of bottom insert canal (10) is provided with the isobutene distributor (4) of helix, isobutene distributor (4) is evenly equipped with through hole (22); Described isobutene distributor (4) is corresponding with described paddle (6).
2. a kind of alkylation reaction still according to claim 1, is characterized in that: described isobutene distributor (4) is set to the high helix tube in low outside, center.
3. a kind of alkylation reaction still according to claim 2, is characterized in that: described isobutene distributor (4) is provided with the support (5) be connected with cylindrical shell (17) inwall.
4. a kind of alkylation reaction still according to claim 1, is characterized in that: the upper end of described Steam Heating semicanal (7) is air intake (12), and one end that Steam Heating semicanal (7) is positioned at cylindrical shell (17) bottom is set to venthole (1); The upper end of described circulating water cooling semicanal (11) is set to recirculated water entrance (13), and the lower end of circulating water cooling semicanal (11) is set to circulating water outlet (9); The cooling import (15) of described cooling inner coil pipe (14) is arranged at the side of cylindrical shell (17) first half; Cooling outlet (3) of described cooling inner coil pipe (14) is arranged at cylindrical shell (17) bottom.
5. a kind of alkylation reaction still according to claim 1, is characterized in that: described cylindrical shell (17) top is provided with manhole (18).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420451323.8U CN204017839U (en) | 2014-08-12 | 2014-08-12 | A kind of alkylation reaction still |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420451323.8U CN204017839U (en) | 2014-08-12 | 2014-08-12 | A kind of alkylation reaction still |
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| CN204017839U true CN204017839U (en) | 2014-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105709665A (en) * | 2016-03-08 | 2016-06-29 | 江苏梅兰化工有限公司 | 5-fluorocytosine fluorination reactor with stirring function |
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2014
- 2014-08-12 CN CN201420451323.8U patent/CN204017839U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105709665A (en) * | 2016-03-08 | 2016-06-29 | 江苏梅兰化工有限公司 | 5-fluorocytosine fluorination reactor with stirring function |
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