CN109382049A

CN109382049A - It is alkylated multistage reactor and alkylation reaction method

Info

Publication number: CN109382049A
Application number: CN201710672373.7A
Authority: CN
Inventors: 袁忠勋
Original assignee: Sinopec Engineering Inc; Sinopec Engineering Group Co Ltd
Current assignee: Sinopec Engineering Inc; Sinopec Engineering Group Co Ltd
Priority date: 2017-08-08
Filing date: 2017-08-08
Publication date: 2019-02-26
Anticipated expiration: 2037-08-08
Also published as: CN109382049B

Abstract

This disclosure relates to a kind of alkylation multistage reactor and alkylation reaction method.The reactor includes the mixing-response element with specific structure, liquid catalyst and reaction feed are passed through duct respectively and are entered reaction zone progress hybrid reaction in a manner of " liquidate injection " in mixing-response element, reaction feed and liquid catalyst can be made to obtain being sufficiently mixed contact in reaction zone, mixing and reaction efficiency are high, improve selectivity and product quality；The alkylation multistage reactor and alkylation reaction method can realize reaction of high order, optimize alkane alkene ratio, improve reaction efficiency, reduce capital cost of reactor and occupied area；Pass through communicating pipe between setting external level, the reaction feed area of liquid catalyst and the mixture of upper level reaction product Jing Guo next stage module is set to enter the second liquid channel that alkylated reaction occurs, reaction feed all passes through the first fluid passage and enters second liquid channel between grade, flow direction of material is matched with the flow proportional of material in reactor, is more advantageous to the raising of alkylated reaction efficiency.

Description

It is alkylated multistage reactor and alkylation reaction method

Technical field

This disclosure relates to petrochemical industry, and in particular, to a kind of alkylation multistage reactor and alkylated reaction side Method.

Background technique

The reaction occurred in the alkylation reactor of petrochemical industry carries out under the effect of the catalyst, catalyst It is divided into two kinds of forms of solid and liquid, liquid catalyst is usually acidic ion liquid.By the research of reaction mechanism it is found that for Using the alkylation process of liquid catalyst, reaction is mainly at the interface of liquid-phase catalyst and hydrocarbon reaction raw material two-phase It completes, and the ratio (alkane alkene ratio) of the renewal rate at interface and alkane and alkene near interface is to influence main reaction selection The key factor of property.In order to reach higher alkylation products selectivity, alkylated reaction need strong liquid liquid mix and compared with High reaction alkane alkene ratio.

Existing liquefied alkyl technology uses multiple reactors more substantially all using similar static mixer class reactor The mode of section feeding, to improve the alkane alkene ratio of inside reactor, forced fluid liquid mixing mass transfer, to reach the choosing for improving alkylate oil The purpose of selecting property and product quality.But this style of reactor mixed effect is poor, and needs more independent horizontal reactings Device, investment height take up a large area.

Summary of the invention

The first aspect purpose of the disclosure is to provide a kind of alkylation multistage reactor, which includes Communicating pipe between shell, mixing-reaction module, interstage diaphragm, external level, first order reaction feed entrance, liquid catalyst entrance, Reaction feed entrance and discharge port between grade；The first order reaction feed entrance is located at the case top, the discharge port It is arranged at intervals with the multistage mixing-reaction module from top to bottom positioned at the housing bottom, in the shell；The mixing- Reaction module include parallel interval setting upper spacer, lower clapboard and multiple mixing-response elements, the upper spacer and under every The end edge of plate is sealedly and fixedly connected respectively to form reaction feed area between upper spacer and lower clapboard with the inner wall of the shell, Mixing-the response element runs through the reaction feed area up and down and fixes and connect with the upper spacer and lower clapboard sealing respectively It connects, the liquid catalyst entrance is set to first order mixing-reaction module upper spacer and lower clapboard positioned at housing tip Between the shell on；The interstage diaphragm is horizontally disposed between the mixing-reaction module of adjacent two-stage, The end edge of the interstage diaphragm and the inner wall of the shell are sealedly and fixedly connected, so that the interstage diaphragm and adjacent upper spacer Reaction feed distributor chamber is formed with the inner walls, the interstage diaphragm is formed with adjacent lower clapboard and the inner walls Reaction product and liquid catalyst collecting chamber are located at the hull outside communicating pipe between the external level, connect between the external level The both ends of siphunculus mix with adjacent two-stage respectively-reaction product of reaction module and liquid catalyst collecting chamber and reaction feed area Connection；Reaction feed entrance between grade is provided on the corresponding shell of each reaction feed distributor chamber；Each described mixing- Response element includes the first tube-like piece and the second tube-like piece being axially arranged；The inside of first tube-like piece is formed as the first liquid Body channel, second tube-like piece are set in except first tube-like piece to be formed as second liquid between the tube wall of the two Channel；Bottom end closure, the tube wall of first tube-like piece are open with multiple first apertures, top with first；Described second The tube wall of tube-like piece has with multiple second apertures, bottom end to be sealed between the second opening, top and the top of the first tube-like piece Connection；Space on upper spacer only mixes the-inner space fluid communication of response element with described by first opening, The reaction feed area is only by second aperture and the second liquid passage, and the space under lower clapboard is only - the inner space of response element fluid communication is mixed with described by second opening.

Optionally, the series of the mixing-reaction module is 2~12 grades.

Optionally, each mixing-reaction module includes equally distributed multiple mixing-in the reaction feed area Response element.

Optionally, first tube-like piece is the round tube or conical pipe of upper end opening.

Optionally, second tube-like piece is the round tube or conical pipe of lower ending opening.

Optionally, the diameter of first aperture is 1~10mm, all described the in each mixing-response element The sum of the perforated area of one aperture accounts for the 1%~60% of the first tube-like piece sidewall area.

Optionally, the diameter of second aperture is 1~10mm, all described the in each mixing-response element The sum of the perforated area of two apertures accounts for the 1%~70% of the second tube-like piece sidewall area.

The second aspect of the disclosure, provide a kind of alkylation multistage reactor that the first aspect using the disclosure provides into The method of row alkylated reaction, this method comprises the following steps: entering first order reaction feed from the first order reaction feed Mouth enters the alkylation multistage reactor, and then the first opening through first tube-like piece enters the mixing-of the first order instead First fluid passage of module is answered, then enters the second liquid channel through first aperture；Make liquid catalyst from The liquid catalyst entrance enters first order mixing-reaction module reaction feed area, in the reaction feed area Liquid catalyst enters the second liquid channel through second aperture, enters the second liquid with through first aperture The first order reaction feed in channel mixes in a manner of the injection that liquidates and carries out alkylated reaction, obtained first order reaction product Enter the reaction product and liquid catalyst collecting chamber from the second opening outflow with liquid catalyst mixture, then through institute State the mixing-reaction module reaction feed area for entering the second level between grade communicating pipe；Make second level reaction feed between the grade Reaction feed entrance enters reaction feed distributor chamber, and then the first opening through first tube-like piece enters the mixed of the second level Conjunction-reaction module first fluid passage, then enter the second liquid channel through first aperture；It is described react into Expect that first order reaction product and liquid catalyst mixture in area enter the second liquid channel through second aperture, with The second level reaction feed for entering the second liquid channel through first aperture is mixed and is carried out in a manner of the injection that liquidates Alkylated reaction, obtained second level reaction product and liquid catalyst mixture are from the second opening outflow, into described Reaction product and liquid catalyst collecting chamber entered communicating pipe between the grade again mixing-reaction module reaction of the third level into Expect area, or leaves the alkylation multistage reactor through the discharge port.

Optionally, the liquid catalyst is acidic ionic liquid catalysts.

Optionally, the reaction feed is the mixture of the alkene of C2~C6 and the isoparaffin of C2~C6.

Through the above technical solutions, the alkylation multistage reactor of the disclosure includes the mixing-reaction with specific structure Element, liquid catalyst passes through the first aperture being oppositely arranged and second respectively with reaction feed and opens in mixing-response element Hole is entered the reaction zone in second liquid channel in a manner of " liquidate injection " and carries out hybrid reaction, can make reaction feed and liquid Catalyst obtains being sufficiently mixed contact in reaction zone, and mixing and reaction efficiency are high, improve selectivity and product quality；The alkane Base multistage reactor and reaction of high order can be realized in a reactor using the method that it is alkylated reaction, optimize alkane Alkene ratio improves reaction efficiency, reduces capital cost of reactor and occupied area；Meanwhile in the alkylation multistage reactor of the disclosure, lead to Spend communicating pipe between setting external level so that the liquid catalyst and mixture of reaction products of the outflow of upper level module all pass through it is next Reaction feed area between the upper lower clapboard of grade module enters the second liquid channel that alkylated reaction occurs, reaction feed between grade Second liquid channel, material in this flow direction of material and reactor are all entered by the first fluid passage of mixing-response element Flow proportional matching, be more advantageous to the raising of alkylated reaction efficiency.

Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.

Detailed description of the invention

Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:

Fig. 1 is a kind of structural schematic diagram of the specific embodiment for the alkylation multistage reactor that the disclosure provides.

Fig. 2 is a kind of mixing-reaction module knot of the specific embodiment for the alkylation multistage reactor that the disclosure provides Structure schematic diagram.

Fig. 3 is a kind of mixing-reaction module of the specific embodiment for the alkylation multistage reactor that the disclosure provides Schematic top plan view (i.e. the AA diagrammatic cross-section of Fig. 2).

Fig. 4 is a kind of mixing-response element knot of the specific embodiment for the alkylation multistage reactor that the disclosure provides Structure schematic diagram.

Fig. 5 is mixing-response element of another specific embodiment for the alkylation multistage reactor that the disclosure provides Structural schematic diagram.

Fig. 6 is in a kind of mixing-response element of the specific embodiment for the alkylation multistage reactor that the disclosure provides Liquid flows to schematic diagram.

Fig. 7 is liquid flow direction in a kind of reactor of the specific embodiment for the alkylation multistage reactor that the disclosure provides Schematic diagram.

Description of symbols

1 shell, 2 top end socket

34 mixing of bottom head-reaction module

6 reaction products and liquid catalyst collecting chamber

7 reaction feed distributor chamber, 8 interstage diaphragm

10 first order reaction feed entrance of communicating pipe between 9 external levels

Reaction feed entrance between 11 12 grades of liquid catalyst entrances

13 14 mixing of discharge port-response element

15 upper spacer, 16 lower clapboard

17 first tube-like piece, 18 second tube-like piece

19 second liquid channels 20 first opening

21 second 22 reaction feed areas of opening

Specific embodiment

It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.

In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower " typically refers to device and exists "up" and "down" under normal operating condition, specifically can be with reference to the page of Fig. 1-Fig. 2, Fig. 4-Fig. 7." inside and outside " refers to For the profile of device.

As shown in Figure 1, the first aspect of the disclosure provides a kind of alkylation multistage reactor, the alkylation multistage reactor Including communicating pipe 9, first order reaction feed entrance 10, liquid between shell 1, mixing-reaction module 4, interstage diaphragm 8, external level Reaction feed entrance 12 and discharge port 13 between catalyst inlet 11, grade；First order reaction feed entrance 10 is located at the top of shell 1 Portion, discharge port 13 are located at 1 bottom of shell, are arranged at intervals with multistage mixing-reaction module 4 in shell 1 from top to bottom；Mixing-is anti- Answering module 4 includes upper spacer 15, lower clapboard 16 and the multiple mixing-response elements 14 of parallel interval setting, 15 He of upper spacer The end edge of lower clapboard 16 is sealedly and fixedly connected respectively to be formed and be reacted between upper spacer 15 and lower clapboard 16 with the inner wall of shell 1 Feed zone 22, about 14 mixing-response element are through reaction feed area 22 and solid with upper spacer 15 and the sealing of lower clapboard 16 respectively Fixed connection, liquid catalyst entrance 11 are set to first order mixing-reaction module 4 15 He of upper spacer positioned at 1 top of shell On shell 1 between lower clapboard 16；Interstage diaphragm 8 is horizontally disposed between mixing-reaction module 4 of adjacent two-stage, The end edge of interstage diaphragm 8 and the inner wall of shell 1 are sealedly and fixedly connected, so that interstage diaphragm 8 and adjacent upper spacer 15 and shell 1 Inner wall forms reaction feed distributor chamber 7, interstage diaphragm 8 and adjacent lower clapboard 16 and 1 inner wall of shell forms reaction product and liquid Body catalyst collecting chamber 6 is located at outside shell 1 communicating pipe 9 between external level, between external level the both ends of communicating pipe 9 respectively with it is adjacent Two-stage mixing-reaction module 4 reaction product is connected to liquid catalyst collecting chamber 6 with reaction feed area 22；It is each react into Reaction feed entrance 12 between grade is provided on the material corresponding shell 1 of distributor chamber 7；Each mixing-response element 14 includes axial The first tube-like piece 17 and the second tube-like piece 18 being arranged；The inside of first tube-like piece 17 is formed as the first fluid passage, the second pipe Shape part 18 is set in except the first tube-like piece 17 to be formed as second liquid channel 19 between the tube wall of the two；First tube-like piece 17 bottom end closure, tube wall have the first opening 20 with multiple first apertures, top；The tube wall of second tube-like piece 18 has more A second aperture, bottom end have to be tightly connected between the second opening 21, top and the top of the first tube-like piece 17；Upper spacer 15 it On space only pass through the first opening 20 with mix-inner space of response element 14 is in fluid communication, reaction feed area 22 only leads to The second aperture and second liquid channel 19 is crossed to be in fluid communication, the space under lower clapboard 16 only pass through the second opening 21 with mix- The inner space of response element 14 is in fluid communication.

The alkylation multistage reactor of the disclosure includes the mixing-response element with specific structure, and at least partly first Aperture and at least partly the second aperture are to be oppositely arranged, and liquid catalyst leads to respectively with reaction feed in mixing-response element The reaction zone that the first aperture being oppositely arranged and the second aperture are entered in a manner of " liquidate injection " in second liquid channel is crossed to carry out Hybrid reaction can make reaction feed and liquid catalyst obtain being sufficiently mixed contact, mixing and reaction efficiency in reaction zone Height improves selectivity and product quality；The alkylation multistage reactor and can be using the method that it is alkylated reaction Reaction of high order is realized in one reactor, optimizes alkane alkene ratio, improves reaction efficiency, reduces capital cost of reactor and occupied area；Together When, in the alkylation multistage reactor of the disclosure, by communicating pipe between setting external level, so that the liquid flowed out from upper level module Reaction feed area between the upper lower clapboard of body catalyst and mixture of reaction products Jing Guo next stage module enters generation alkyl Change the second liquid channel of reaction, reaction feed all passes through the first fluid passage of mixing-response element into the second liquid between grade Body channel, this flow direction of material are matched with the flow proportional of material in reactor, are more advantageous to the raising of alkylated reaction efficiency.

According to the disclosure, communicating pipe 9 can be the communicating pipe that reactor enclosure body side surface is arranged between external level, between external level The upper end opening and lower ending opening of communicating pipe 9 is respectively arranged in housing sidewall, for being connected to upper level mixing-reaction module Reaction product and liquid catalyst collecting chamber 6 mix with adjacent next stage-and it is anti-between reaction module upper spacer and lower clapboard Answer feed zone 22.Thus reaction product and liquid catalyst from reaction product and liquid catalyst collecting chamber 6 can enter phase by pipe The reaction feed area 22 of adjacent next stage mixing-reaction module, subsequently into each mixing-response element 14.Communicating pipe 9 between external level Any position of housing side can be located at, communicating pipe 9 can be in the same position of shell circumference between adjacent external level, or is in Angle is interspersed in shell circumference.Further, in order to promote fluid in each mixing-reaction module 4 quickly and evenly Distribution, in the disclosure preferably a kind of embodiment, as shown in Figure 1, communicating pipe 9 is located at the same of housing side between external level Horizontal position.

According to the disclosure, interstage diaphragm 8 can be horizontally arranged at it is round in space between adjacent mixing-reaction module Partition, the fixed fluid to completely cut off about 8 two sides of interstage diaphragm of outer rim and inner walls sealing of round partition.Interstage diaphragm 8 Top be upper level mixing-reaction module reaction product and liquid catalyst collecting chamber 6, leave upper level mixing-reaction The reaction product and liquid catalyst mixture of each mixing-response element 14 of module 4 are collected herein.The lower section of interstage diaphragm 8 is Thus this grade of mixing-reaction module reaction feed distributor chamber 7, reaction feed enter each mixing-of each mixing-reaction module 4 In response element 14.

According to the disclosure, in order to realize reaction of high order, advanced optimizes alkane alkene ratio, improves reaction efficiency, it is preferable that shell The number of mixing-reaction module 4 can be 2~12, more preferably 9 in 1.

According to the disclosure, in order to further strengthen the Liquid-liquid mixing efficiency in each mixing-reaction module 4, preferably feelings Under condition, each mixing-reaction module 4 may include answering equally distributed multiple mixing-response elements 14 in feed zone 22, mix The number of conjunction-response element 14 determines after being calculated according to the concrete condition of alkylated reaction.

According to the disclosure, the shape of the first tube-like piece 17 and the second tube-like piece 18 does not have special requirement, can be conventional Any shape of type, as long as guaranteeing at least partly the first aperture and at least of the first tube-like piece 17 and 18 tube wall of the second tube-like piece The second opening direction of part is opposite, and the material of the first tube-like piece 17 and the second tube-like piece 18 may be conventional material, excellent It is selected as porous metal powder metallurgy or silk screen fires pipe.First tube-like piece 17 is preferably the round tube or conical pipe of upper end opening, Second tube-like piece 18 is preferably the round tube or conical pipe of lower ending opening.For example, in a kind of specific embodiment of the disclosure, such as Shown in Fig. 4, the first tube-like piece 17 is the round tube of upper end opening, and the second tube-like piece 18 is the round tube of lower ending opening.In the disclosure In another specific embodiment, as shown in figure 5, the first tube-like piece 17 is the conical tube of upper end opening, the second tube-like piece 18 is The round tube of lower ending opening, and the caliber of the first tube-like piece 17 gradually decreasees from top to bottom.In above-mentioned preferred embodiment, the One tube-like piece 17 and the second tube-like piece 18 carry out the more efficient of liquid mixing by respective aperture and prepare convenient for molding.

According to the disclosure, the tube wall of the first tube-like piece 17 and the second tube-like piece 18 can be respectively formed with uniformly or non-uniformly Aperture, the size and number of aperture can change in a big way, and the diameter of the first aperture can be 1~10mm, preferably 3mm, the sum of the perforated area of all first apertures can account for the first tube-like piece sidewall area in each mixing-response element 14 1%~60%, preferably 10%~45%, most preferably 20%~40%；The diameter of second aperture can be 1~10mm, excellent It is selected as 3mm, the sum of the perforated area of all second apertures can account for the second tube-like piece side wall surface in each mixing-response element 14 Long-pending 1%~70%, preferably 15%~60%, most preferably 30%~50%.Above-mentioned preferred perforated area and reactor Interior fluid flow more matches, and is conducive to the mixing of the liquid in reactor and the raising of reaction efficiency.

In the disclosure preferably a kind of specific embodiment, as shown in Fig. 2-Fig. 3, upper spacer 15 be provided with mix-it is anti- The identical circular apertures of 14 quantity of element are answered, the diameter of circular apertures is outer slightly larger than the second tube-like piece 18 of mixing-response element 14 Diameter, the top of each mixing-response element 14 seals respectively to be fixed in the corresponding circular apertures of upper spacer 15, the first tube-like piece 17 First opening 20 at top is concentric with the circular apertures of upper spacer 15, is liquid catalyst or reaction product and liquid catalyst mixing The import of object, the outer rim of upper spacer 15 and the inner wall of alkylation multistage reactor shell 1 are sealed and are fixed.Lower clapboard 16 be also provided with The identical circular apertures of 14 quantity of mixing-response element, the horizontal position of the circular apertures of the circular apertures and upper spacer 15 of lower clapboard 16 It is corresponding with one heart one by one.Mixing-response element 14 further includes closed cover, the top of the second tube-like piece 18 by the closed cover with First tube-like piece 17 is tightly connected, and the outer rim of closed cover is fixedly connected with the circumferential sealing of 15 circular apertures of upper spacer, the second pipe Second opening 21 of shape part 18 is fixedly connected with the circumferential sealing of 16 circular apertures of lower clapboard.

The second aspect of the disclosure, provide a kind of alkylation multistage reactor that the first aspect using the disclosure provides into The method of row alkylated reaction, this method comprises the following steps: making first order reaction feed from first order reaction feed entrance 10 Into alkylation multistage reactor, then the first opening 20 through the first tube-like piece 17 enters mixing-reaction module 4 of the first order The first fluid passage, then enter second liquid channel 19 through the first aperture；Make liquid catalyst from liquid catalyst entrance 11 Into the reaction feed area 22 of mixing-reaction module 4 of the first order, the liquid catalyst in reaction feed area 22 is through the second aperture Into second liquid channel 19, and enter the first order reaction feed in second liquid channel 19 through the first aperture with the injection that liquidates Mode mixes and carries out alkylated reaction, and obtained first order reaction product and liquid catalyst mixture is flowed from the second opening 21 Enter reaction product and liquid catalyst collecting chamber 6 out, then enters mixing-reaction module 4 of the second level through communicating pipe 9 between grade Reaction feed area 22；Second level reaction feed is set to enter reaction feed distributor chamber 7 from reaction feed entrance 12 between grade, then through the One tube-like piece 17 first opening 20 enter the second level mixing-reaction module 4 the first fluid passage, then through the first aperture into Enter second liquid channel 19；First order reaction product and liquid catalyst mixture in reaction feed area 22 through the second aperture into Enter second liquid channel 19, and enters the second level reaction feed in second liquid channel 19 through the first aperture with the side for the injection that liquidates Formula mixes and carries out alkylated reaction, and obtained second level reaction product and liquid catalyst mixture is flowed from the second opening 21 Out, enter mixing-reaction mould of the third level through communicating pipe 9 between external level again into reaction product and liquid catalyst collecting chamber 6 The reaction feed area 22 of block 4, or alkylation multistage reactor is left through discharge port 13.

The alkylation multistage reactor of the disclosure includes the mixing-response element with specific structure, using the alkylation The alkylation of multistage reactor can make liquid catalyst and reaction feed mix-response element in pass through duct respectively Enter reaction zone in a manner of " liquidate injection " and carry out hybrid reaction, reaction feed and liquid catalyst can be made to obtain in reaction zone To contact is sufficiently mixed, mixing and reaction efficiency are high, improve selectivity and product quality；The alkylation multistage reactor contains It is multiple to can be realized reaction of high order containing mixing-response element mixing-reaction module, to optimize alkane alkene ratio, improve reaction Efficiency reduces capital cost of reactor and occupied area.

According to the disclosure, the liquid catalyst can be the various conventional liq catalyst suitable for alkylated reaction, Preferably acidic ionic liquid catalysts.

According to the disclosure, reaction feed can be the hydrocarbon mixture including alkene and alkane, preferably contain C2 The mixture of the isoparaffin of the alkene and C2~C6 of~C6, more preferably the C4 component containing alkene and alkane.Reaction feed The alkane alkene ratio of mixture can be 5~20, preferably 8~15, and " the dilute ratio of alkane " therein refers to isoparaffin and alkene in mixture The molar ratio of hydrocarbon.

In the disclosure preferably a kind of specific embodiment, as Figure 6-Figure 7, using alkylation multistage reactor into The method of row alkylated reaction includes the following steps:

(1) first order reaction feed is made to enter alkylation multistage reactor from first order reaction feed entrance 10, full of the Level-one mixing-reaction module upper spacer 15 upper space, then the first opening 20 through the first tube-like piece 17 enters the first order Mixing-reaction module 4 the first fluid passage, then enter second liquid channel 19 through the first aperture；(2) make liquid catalyst Enter the upper spacer of mixing-reaction module 4 of the first order under from the liquid catalyst entrance 11 for being located at reactor enclosure body side surface Reaction feed area 22 between partition, the liquid catalyst in reaction feed area 22 pass through the of each mixing-response element respectively Two apertures enter second liquid channel 19, and enter the first order reaction feed in second liquid channel 19 through the first aperture to liquidate The mode of injection mixes and carries out alkylated reaction；(3) first order reaction product and liquid catalyst mixture obtained is It flows downward in two fluid passages 19, the first order is then left by 21 outflow of the opening of mixing-response element second respectively and is mixed Conjunction-reaction module；(4) in order to keep reacting required alkane alkene ratio, selectivity is improved, is needed to second level mixing-reaction module Part reaction feed is supplemented, the reaction feed of supplement enters reaction feed distributor chamber from reaction feed entrance 12 between the grade of the second level 7, then the first opening 20 through the first tube-like piece 17 enters the first fluid passage of mixing-reaction module 4 of the second level, then passes through First aperture enters second liquid channel 19；Leave first order mixing-reaction module first order reaction product and liquid catalyst Agent composition enters reaction product and liquid catalyst collecting chamber 6 and is entered the mixing-of the second level communicating pipe 9 between external level instead again Answer the reaction feed area 22 of module 4；And second liquid channel 19 is entered by the second aperture of mixing-response element, and through The second level reaction feed that one aperture enters second liquid channel 19 mixes in a manner of the injection that liquidates and carries out alkylated reaction, Then reaction product and liquid catalyst mixture enter reaction product and liquid catalyst collecting chamber 6, then outer through the second level Leave the reaction feed area 22 that second level mixing-reaction module enters mixing-reaction module 4 of the third level between ministerial level communicating pipe 9； (5) it leaves afterbody mixing-reaction module reaction product and liquid catalyst mixture enters reactor lowest part space, Then alkylation multistage reactor is left by discharge port 13；(6) reaction product and liquid catalyst mixing of reactor are left Object send to subsequent separation facility and is separated, and isolates alkylation products and liquid catalyst, liquid catalyst is sent back to again Multistage reactor is alkylated to be recycled.

The disclosure is further illustrated below with reference to embodiment, but therefore the disclosure is not any way limited.

Embodiment 1:

As Figure 1-Figure 4, the present embodiment provides 4 grades of mixing-reaction module alkylation multistage reactors built in one kind. It include: internal diameter for 2800mm, length is the shell 1 of 6000mm, top end socket 2 and bottom head 3, and top end socket 2 and lower part are sealed First 3 respectively sealing welding at the both ends of shell 1 form closed reactor shell, 4 groups of installation is in shell 1 with a thickness of 600mm's Mixing-reaction module 4, top end socket 2 are spheroid shape, and top is provided with the first order reaction feed entrance 10 of DN100, shell 1 The liquid catalyst entrance 11 of a DN200 is arranged in side surface upper part, and 1 side middle and lower part of shell is reacted between the grade of 3 DN100 is arranged Feed entrance 12, bottom head 3 are spheroid shape, bottom be provided with DN250 for reaction product and liquid catalyst mixture from Open the discharge port 13 of reactor；

3 interstage diaphragms 8 are set between mixing-reaction modules at different levels, and each interstage diaphragm is provided with the outside of DN250 Communicating pipe 9 between grade；The spatial altitude of reaction product and liquid catalyst collecting chamber 6 is 450mm, the sky of reaction feed distributor chamber 7 Between highly be 300mm；Mixing-reaction module includes 12 mixing-response elements 14, upper spacer 15 and lower clapboard 16 respectively with shell Body sealing welding is fixed；

Mixing-response element 14 includes the first tube-like piece of equal diameter 17 that internal diameter is 40mm and internal diameter is the second of 200mm Tube-like piece 18, the long 350mm of the first tube-like piece 17, the diameter in hole are 3mm, and percent opening is the 30% of tube wall surface product；Second liquid 19 radial spacing of channel (the distance between the internal diameter of the outer diameter of the first tube-like piece 17 and the second tube-like piece 18) radial spacing (first The distance between the internal diameter of 17 outer diameters of tube-like piece and the second tube-like piece 18) it is 76mm；Second tube-like piece 18 is metal powder smelting Gold fires pipe, and porosity is the 40% of tube wall surface product；The diameter of the opening of mixing-response element first 20 is 40mm, mixing- The diameter of second opening 21 of response element is 150mm；

Liquid catalyst is the acidic ionic liquid catalysts of chloride；Reaction feed forms (weight %) such as 1 institute of table Show.

Table 1

Reaction feed component	Content (weight %)
		Propane	0.08
Propylene	0.02
		Iso-butane	43.0
Normal butane	23.0
		Trans-2-butene	12.5
1- butylene	12.5
		Isobutene	0.02
Cis-2-butene	7.9
		1,3- butadiene	0.2
Other	0.78
		It is total	100.0

Reaction condition: average reaction temperature is 20 DEG C；Alkane alkene is fed than average out to 10.0 (molar ratio).

Alkylate oil yield 81.2%.

Embodiment 2:

With embodiment 1, difference is only that: in mixing-response element 14 shape of the first set tube-like piece 17 be as The small rounding Taper Pipe of the big lower diameter of top diameter shown in fig. 5, upper and lower diameter proportion are 1:0.65, and the first tube-like piece 17 is long 350mm, the diameter in hole are 3mm, and percent opening is the 30% of tube wall surface product；

19 radial spacing of second liquid channel (between the outer diameter of the first tube-like piece 17 and the internal diameter of the second tube-like piece 18 away from From) top be 76mm；Lower part is 87mm；Second tube-like piece 18 is that metal mesh fires pipe, and porosity is the 40% of tube wall surface product, The diameter of the opening of mixing-response element second 21 is 150mm.

Alkylate oil yield 81.15%.

The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure Monotropic type, these simple variants belong to the protection scope of the disclosure.

It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the disclosure to it is various can No further explanation will be given for the combination of energy.

In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally Disclosed thought equally should be considered as disclosure disclosure of that.

Claims

1. a kind of alkylation multistage reactor, which is characterized in that the alkylation multistage reactor includes shell (1), mixing-reaction Communicating pipe (9), first order reaction feed entrance (10), liquid catalyst entrance between module (4), interstage diaphragm (8), external level (11), reaction feed entrance (12) and discharge port (13) between grade；

The first order reaction feed entrance (10) is located at the top of the shell (1), and the discharge port (13) is located at the shell (1) bottom, the shell (1) is interior to be arranged at intervals with the multistage mixing-reaction module (4) from top to bottom；

Mixing-the reaction module (4) includes the upper spacer (15), lower clapboard (16) and multiple mixing-of parallel interval setting The end edge of response element (14), the upper spacer (15) and lower clapboard (16) seals with the inner wall of the shell (1) fix respectively Connection is to form reaction feed area (22) between upper spacer (15) and lower clapboard (16), on the mixing-response element (14) Run through the reaction feed area (22) down and is sealedly and fixedly connected respectively with the upper spacer (15) and lower clapboard (16), the liquid Body catalyst entrance (11) be set to the first order mixing positioned at shell (1) top-reaction module (4) upper spacer (15) and under On the shell (1) between partition (16)；

The interstage diaphragm (8) is horizontally disposed between the mixing-reaction module (4) of adjacent two-stage, the grade The end edge of spacing board (8) and the inner wall of the shell (1) are sealedly and fixedly connected so that the interstage diaphragm (8) with it is adjacent upper Partition (15) and the shell (1) inner wall form reaction feed distributor chamber (7), the interstage diaphragm (8) and adjacent lower clapboard (16) and the shell (1) inner wall forms reaction product and liquid catalyst collecting chamber (6), communicating pipe (9) between the external level External positioned at the shell (1), the both ends of communicating pipe (9) mix-reaction module (4) with adjacent two-stage respectively between the external level Reaction product be connected to liquid catalyst collecting chamber (6) with reaction feed area (22)；Each reaction feed distributor chamber (7) Reaction feed entrance (12) between grade is provided on corresponding shell (1)；

Each described mixing-response element (14) includes the first tube-like piece (17) and the second tube-like piece (18) being axially arranged； The inside of first tube-like piece (17) is formed as the first fluid passage, and second tube-like piece (18) is set in first pipe To be formed as second liquid channel (19) between the tube wall of the two except shape part (17)；The bottom end of first tube-like piece (17) Closing, tube wall have the first opening (20) with multiple first apertures, top；The tube wall of second tube-like piece (18) has more A second aperture, bottom end have to be tightly connected between the second opening (21), top and the top of the first tube-like piece (17)；Upper spacer (15) space on only mixes the-inner space fluid company of response element (14) with described by first opening (20) Logical, the reaction feed area (22) is only in fluid communication by second aperture and the second liquid channel (19), lower clapboard (16) space under only mixes the-inner space fluid company of response element (14) with described by second opening (21) It is logical.

2. alkylation multistage reactor according to claim 1, which is characterized in that the grade of the mixing-reaction module (4) Number is 2~12 grades.

3. alkylation multistage reactor according to claim 1, which is characterized in that each mixing-reaction module (4) It is included in equally distributed multiple mixing-response elements (14) in the reaction feed area (22).

4. alkylation multistage reactor according to claim 1, which is characterized in that first tube-like piece (17) is upper end The round tube or conical pipe of opening.

5. alkylation multistage reactor according to claim 1, which is characterized in that second tube-like piece (18) is lower end The round tube or conical pipe of opening.

6. alkylation multistage reactor according to claim 1, which is characterized in that the diameter of first aperture be 1~ 10mm, the sum of the perforated area of all first apertures accounts for first tubulose in each mixing-response element (14) The 1%~60% of part (17) sidewall area.

7. alkylation multistage reactor according to claim 1, which is characterized in that the diameter of second aperture be 1~ 10mm, the sum of the perforated area of all second apertures accounts for second tubulose in each mixing-response element (14) The 1%~70% of part (18) sidewall area.

8. the method that reaction is alkylated using alkylation multistage reactor described in any one of claim 1~7, It is characterized in that, this method comprises the following steps:

First order reaction feed is set to enter the alkylation multistage reactor from the first order reaction feed entrance (10), then The first opening (20) through first tube-like piece (17) enters first liquid of mixing-reaction module (4) of the first order Channel, then enter the second liquid channel (19) through first aperture；Enter liquid catalyst from the liquid catalyst Mouth (11) enters first order mixing-reaction module (4) reaction feed area (22), the liquid in the reaction feed area (22) Body catalyst enters the second liquid channel (19) through second aperture, enters second liquid with through first aperture The first order reaction feed in body channel (19) mixes in a manner of the injection that liquidates and carries out alkylated reaction, and the obtained first order is anti- Product and liquid catalyst mixture is answered to enter the reaction product and liquid catalyst receipts from the second opening (21) outflow Collect room (6), then through communicating pipe (9) between the external level enter the second level mixing-reaction module (4) reaction feed area (22)；

Second level reaction feed is set to enter reaction feed distributor chamber (7) from reaction feed entrance (12) between the grade, then through institute State the first tube-like piece (17) first opening (20) enter the second level mixing-reaction module (4) first fluid passage, Enter the second liquid channel (19) through first aperture again；First order reaction product in the reaction feed area (22) Enter the second liquid channel (19) through second aperture with liquid catalyst mixture, enters with through first aperture The second level reaction feed of the second liquid channel (19) mixes in a manner of the injection that liquidates and carries out alkylated reaction, obtains Second level reaction product and liquid catalyst mixture from it is described second opening (21) flow out, into the reaction product and liquid Body catalyst collecting chamber (6) enters the reaction of mixing-reaction module (4) of the third level through communicating pipe (9) between the external level again Feed zone (22), or the alkylation multistage reactor is left through the discharge port (13).

9. according to the method described in claim 8, it is characterized in that, the liquid catalyst is acidic ionic liquid catalysts.

10. according to the method described in claim 8, it is characterized in that, the reaction feed be C2~C6 alkene and C2~ The mixture of the isoparaffin of C6.