CN207031313U - Cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride - Google Patents
Cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride Download PDFInfo
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- CN207031313U CN207031313U CN201721032255.1U CN201721032255U CN207031313U CN 207031313 U CN207031313 U CN 207031313U CN 201721032255 U CN201721032255 U CN 201721032255U CN 207031313 U CN207031313 U CN 207031313U
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Abstract
The utility model discloses the production system that a kind of cis-butenedioic anhydride direct hydrogenation prepares high purity butylene dicarboxylic anhydride, including hydrogenation reactor and make-up hydrogen compressor, make-up hydrogen compressor is connected by new hydrogen pipeline with hydrogenation reactor, hydrogenation reactor top is provided with cis-butenedioic anhydride solution line, hydrogen gas return line is provided with the top of hydrogenation reactor, hydrogen gas return line and new hydrogen pipeline communication, the lower end of hydrogenation reactor is connected by the middle part of discharge pipe and lightness-removing column, the lower end of lightness-removing column is connected by pipeline I with the middle part of butyrolactone removing tower, the lower end of butyrolactone removing tower is connected by pipeline II with the middle part of weight-removing column, the top of weight-removing column is provided with weight-removing column reflux and succinic anhydride product extraction pipe, lightness-removing column, vacuum system is respectively equipped with the top of de- butyrolactone tower and weight-removing column；The hydrogenation reactor that the utility model uses is operated using four sections of hydrogenation, rectifying section using low vacuum, is completely separated succinic anhydride and butyrolactone, improves product purity.
Description
Technical field
The utility model belongs to technical field of chemical production equipment, and in particular to a kind of cis-butenedioic anhydride direct hydrogenation prepares high-purity
The production system of succinic anhydride.
Background technology
Succinic anhydride is colourless needles or granular crystal, is dissolved in ethanol, chloroform and carbon tetrachloride, with hot water hydrolyzable
For succinic acid.Molecular formula：C4H4O3.Organic industry is used as the intermediate of anthropogenics.
Succinic anhydride product processes can be divided into following several by raw material route：Succinic acid evaporation, paraffin oxidation style,
Maleic anhydride hydrogenation method.Wherein maleic anhydride hydrogenation method is divided into batch (-type) maleic anhydride hydrogenation, cis-butenedioic anhydride continuity method direct hydrogenation and cis-butenedioic anhydride in solvent again
It is hydrogenated with state, wherein cis-butenedioic anhydride is hydrogenated with solvent state and industrialized production and application have been carried out, and designed capacity can reach
3000t/a, batch (-type) maleic anhydride hydrogenation method is because its production process is discontinuous, and using due to tank reactor, it is effectively anti-
Answer capacity utilization relatively low, the production technology needs more reaction auxiliary equipment such as holding vessel, and the technique also has equipment throwing
The shortcomings that big is provided, is only capable of reaching 500-1000t/a, and byproduct of reaction is more, purity is low, can not meet pharmaceutical grade standard.Cis-butenedioic anhydride
It is hydrogenated with solvent state, although having obtained industrial applications, solvent is high in product, and product easily occurs hardened existing
As being attributed in succinic anhydride product that butyrolactone content is higher, hardly entering field of medicaments.
Described by above-mentioned production visible, cis-butenedioic anhydride directed hydrogenation still has many drawbacks, and yield is low, product purity
Problem is difficult to solve, and yields poorly in addition, can not meet extensive demand.Catalyst disclosed in patent US577044, US5952514
Reaction pressure is high, and capital cost of reactor is big, and material requires high, it is impossible to realizes continuous operation, heat is difficult to remove in time.And cis-butenedioic anhydride exists
Hydrogenation, which exists in follow-up rectification and purification product, under solvent state contains butyrolactone, it is difficult to reaches 100% removing, product has plate
The situation of knot.
Reactor disclosed in patent No. CN201110235411 is using the liquid after hydrogenation reaction between every section of beds
Body is condensed using cooling, and cooler easily crystallizes, and is difficult to overhaul between beds, after blocking, and reaction is
Under cyclohexane solvent state, a new medium is introduced again, in rectification section in addition to removing butyrolactone, also to remove ring
Hexane, influence product purity.
Utility model content
For problems of the prior art, the utility model provides a kind of cis-butenedioic anhydride direct hydrogenation and prepares high purity butylene two
The production system of acid anhydrides, solve in the prior art maleic anhydride hydrogenation succinic anhydride exothermic heat of reaction it is larger and be not easy move heat, product it is pure
Spend the problem of relatively low.
In order to solve the above technical problems, the utility model uses following technical scheme：
A kind of cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride, including hydrogenation reactor and new hydrogen compressed
Machine, make-up hydrogen compressor are connected by new hydrogen pipeline with hydrogenation reactor, and hydrogenation reactor top is provided with cis-butenedioic anhydride solution line, hydrogenation
Reactor head is provided with hydrogen gas return line, and hydrogen gas return line and new hydrogen pipeline communication, the hydrogen gas return line are provided with recycle hydrogen
Compressor, the lower end of the hydrogenation reactor are connected by the middle part of discharge pipe and lightness-removing column, and the top of lightness-removing column, which is provided with, to be taken off
Light tower reflux and light component extraction pipe, the lower end of lightness-removing column is connected by pipeline I with the middle part of butyrolactone removing tower, in fourth
The top of ester removing tower is provided with butyrolactone removing tower reflux and butyrolactone extraction pipe, and the lower end of butyrolactone removing tower passes through pipe
Road II is connected with the middle part of weight-removing column, and the top of weight-removing column is provided with weight-removing column reflux and succinic anhydride product extraction pipe, fourth
Diacid anhydride product extraction pipe is provided with membrane separation assemblies, and the lower end of weight-removing column is provided with succinic anhydride heavy constituent extraction pipe, described de-
Be respectively equipped with vacuum system at the top of light tower, de- butyrolactone tower and weight-removing column, the vacuum system respectively with lightness-removing column reflux,
De- butyrolactone tower reflux connects with weight-removing column reflux.
The cis-butenedioic anhydride solution line is provided with hydrogenation circulating pump and recirculation cooler, the cis-butenedioic anhydride solution line and discharge nozzle
Road connects, and discharge pipe is provided with check valve.
The hydrogen gas return line is provided with recycle hydrogen knockout drum, and recycle hydrogen knockout drum is arranged on circulation hydrogen compressed
The upstream of machine, give up hydrogen discharge pipe for the recycle hydrogen knockout drum upper end, and the hydrogen gas return line connects with useless hydrogen discharge pipe, institute
State useless hydrogen discharge pipe and be provided with tail gas regulating valve.
The new hydrogen pipeline is made up of new hydrogen supervisor and four new hydrogen branch pipes, and new hydrogen supervisor connects with four new hydrogen branch pipes,
Four new hydrogen branch pipes are connected by order from top to bottom with hydrogenation reactor.
The pipeline I is provided with lightness-removing column forced circulation pump, and the lightness-removing column lower end is provided with lightness-removing column reboiler, lightness-removing column
One end of reboiler is connected with lightness-removing column lower end, and the other end of lightness-removing column reboiler connects with pipeline I, the lightness-removing column reboiler
Using downward film evaporator.
The pipeline II is provided with butyrolactone removing tower forced circulation pump, and the butyrolactone removing tower lower end is provided with butyrolactone
Removing tower reboiler, one end of butyrolactone removing tower reboiler are connected with butyrolactone removing tower lower end, and butyrolactone removing tower is boiled again
The other end of device connects with pipeline II, and the butyrolactone removing tower reboiler uses downward film evaporator.
The succinic anhydride heavy constituent extraction pipe is provided with weight-removing column forced circulation pump, and the weight-removing column lower end is provided with de- weight
Tower reboiler, one end of weight-removing column reboiler are connected with weight-removing column lower end, take off the other end and succinic anhydride for removing tower reboiler again
Heavy constituent extraction pipe connection, the weight-removing column reboiler use downward film evaporator.
The lightness-removing column reflux includes lightness-removing column reflux pump, lightness-removing column return tank and lightness-removing column overhead condenser, takes off
Light top of tower is connected by pipeline with lightness-removing column overhead condenser, and lightness-removing column overhead condenser is connected with lightness-removing column return tank, is taken off
Light tower return tank is connected with lightness-removing column reflux pump, and lightness-removing column reflux pump is connected with light component extraction pipe；The butyrolactone removing tower
Reflux includes butyrolactone removing tower reflux pump, butyrolactone removing tower return tank and butyrolactone removing tower overhead condenser, fourth
It is connected at the top of lactone removing tower by pipeline with butyrolactone removing tower overhead condenser, butyrolactone removing tower overhead condenser and fourth
Lactone removing tower return tank is connected, and butyrolactone removing tower return tank is connected with butyrolactone removing tower reflux pump, butyrolactone removing tower
Reflux pump is connected with butyrolactone extraction pipe；The weight-removing column reflux includes weight-removing column reflux pump, weight-removing column return tank and taken off
Weight column overhead condenser, weight-removing column top are connected by pipeline with weight-removing column overhead condenser, and weight-removing column overhead condenser is with taking off
The return tank connection of weight tower, weight-removing column return tank are connected with weight-removing column reflux pump, and weight-removing column reflux pump produces with succinic anhydride product
Pipe connects.
The vacuum system includes high-vacuum pump, and the import of high-vacuum pump takes off with lightness-removing column reflux, butyrolactone respectively
Except tower reflux connects with weight-removing column reflux, the outlet of high-vacuum pump is connected with knockout drum, the high-vacuum pump
It is connected using butyrolactone as pendular ring, high-vacuum pump by butyrolactone pipeline with knockout drum, butyrolactone pipeline is provided with cold
Freeze water- to-water heat exchanger, described knockout drum upper end is provided with non-condensable gas pipeline, and knockout drum lower end is provided with butyrolactone recovery tube
Road.
The beneficial effects of the utility model：1st, hydrogenation reactor of the present utility model is one, is injected using four sections of cold hydrogen,
Reactor is avoided the phenomenon of temperature runaway occur, heat can remove in time, reduce the bed pressure difference between fixed bed catalyst, improve
The service life of catalyst, it is possible to achieve continuous production；2nd, three rectifying columns（Lightness-removing column, de- butyrolactone tower and weight-removing column）
Reboiler use downward film evaporator, material is not easy coking, also saves steam consumption, and the purity of product is also higher.
3rd, the high-vacuum pump of vacuum system uses high vacuum using butyrolactone as pendular ring, butyrolactone removing tower, and high-vacuum pump can fill
Dividing reduces butyrolactone removing tower vacuum, fixed gas of the overhead condenser without condensation is pumped into this vacuum system, and use
Chilled water carries out ultralow temperature cooling, the butyrolactone in fixed gas is fully reclaimed, so as to by butyrolactone removing tower
Vacuum largely reduced, the butyrolactone of vavuum pump discharge is realized and recycled by rectification and purification, vacuum
Degree is effectively reduced, and improves the product quality of succinic anhydride.4th, recycle hydrogen knockout drum is played between reaction and separation
Decompression cushioning effect, the gas phase of knockout drum is mainly hydrogen, is conducted into circulating hydrogen compressor entrance, can play drop
The effect of low device hydrogen consumption.5th, weight-removing column overhead condenser uses hot water circuit, substitutes recirculated water, is easy to control reflux temperature,
Avoid succinic anhydride from solidifying at low temperature, block pipeline, backflow can not be established, influence the long-term operation of rectifying column.6th, fourth two
Anhydride product extraction pipe is provided with membrane separation assemblies, after membrane separation, can fall the butyrolactone removing in succinic anhydride,
Succinic anhydride purity is improved so as to reach, reaches more than 99.9%, much meets pharmaceutical grade standard.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model vacuum system.
Embodiment
With reference to specific embodiment, the utility model is described further.It should be understood that following examples are only used for
For bright the utility model not for limitation the scope of the utility model, the person skilled in the art in the field can be according to above-mentioned practicality
New content makes some nonessential modifications and adaptations.
A kind of cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride, including hydrogenation reactor 1 and new hydrogen pressure
Contracting machine 17, make-up hydrogen compressor 17 are connected by new hydrogen pipeline with hydrogenation reactor 1, and new hydrogen pipeline is by new hydrogen supervisor 131 and four
New hydrogen branch pipe 132 is formed, and new hydrogen supervisor 131 is connected with four new hydrogen branch pipes 132, and four new hydrogen branch pipes 132 are pressed from top to bottom
Order is connected with hydrogenation reactor 1.
The top of hydrogenation reactor 1 is provided with hydrogen gas return line 14, hydrogen gas return line 14 and new hydrogen pipeline communication, hydrogen gas return line
14 are provided with circulating hydrogen compressor 16 and recycle hydrogen knockout drum 20, and recycle hydrogen knockout drum 20 is arranged on circulation hydrogen compressed
The upstream of machine 16, the upper end of recycle hydrogen knockout drum 20 are provided with useless hydrogen discharge pipe 15, hydrogen gas return line 14 and useless hydrogen discharge pipe 15
Connection, the useless hydrogen discharge pipe 15 are provided with tail gas regulating valve 18.
The top of hydrogenation reactor 1 is provided with cis-butenedioic anhydride solution line 12, and cis-butenedioic anhydride solution line 12 is provided with the hydrogenation He of circulating pump 10
Recirculation cooler 11, the lower end of hydrogenation reactor 1 are connected by discharge pipe 19 with the middle part of lightness-removing column 2, cis-butenedioic anhydride solution line
12 connect with discharge pipe 19, and discharge pipe 19 is provided with check valve 191.
The top of lightness-removing column 2 is provided with lightness-removing column reflux and light component extraction pipe 24, and lightness-removing column reflux includes de-
Light tower reflux pump 81, lightness-removing column return tank 71 and lightness-removing column overhead condenser 61, the top of lightness-removing column 2 pass through pipeline and lightness-removing column tower
Top condenser 61 is connected, and lightness-removing column overhead condenser 61 is connected with lightness-removing column return tank 71, lightness-removing column return tank 71 and lightness-removing column
Reflux pump 81 is connected, and lightness-removing column reflux pump 81 is connected with light component extraction pipe 24；The lower end of lightness-removing column 2 passes through pipeline I 21 and fourth
The middle part connection of lactone removing tower 3, pipeline I 21 are provided with lightness-removing column forced circulation pump 22, and lightness-removing column lower end is provided with lightness-removing column again
Device 23 is boiled, one end of lightness-removing column reboiler 23 is connected with lightness-removing column lower end, and the other end and the pipeline I 21 of lightness-removing column reboiler 23 connect
Logical, lightness-removing column reboiler uses downward film evaporator.
The top of butyrolactone removing tower 3 is provided with butyrolactone removing tower reflux and butyrolactone extraction pipe 34, and butyrolactone takes off
Except tower reflux is cold including butyrolactone removing tower reflux pump 82, butyrolactone removing tower return tank 72 and butyrolactone removing column overhead
Condenser 62, butyrolactone removing tower top are connected by pipeline with butyrolactone removing tower overhead condenser 62, butyrolactone removing tower tower
Top condenser 62 is connected with butyrolactone removing tower return tank 72, butyrolactone removing tower return tank 72 and butyrolactone removing tower reflux pump
82 connections, butyrolactone removing tower reflux pump 82 are connected with butyrolactone extraction pipe 34；The lower end of butyrolactone removing tower passes through pipeline II
31 are connected with the middle part of weight-removing column 4, and pipeline II 31 is provided with butyrolactone removing tower forced circulation pump 32, under butyrolactone removing tower 3
End is provided with butyrolactone removing tower reboiler 33, and one end of butyrolactone removing tower reboiler 33 is connected with butyrolactone removing tower lower end,
The other end of butyrolactone removing tower reboiler 33 connects with pipeline II 31, and the butyrolactone removing tower reboiler 33 uses falling film type
Evaporator.
The top of weight-removing column 4 is provided with weight-removing column reflux and succinic anhydride product extraction pipe 44, and succinic anhydride product is adopted
Outlet pipe 44 is provided with membrane separation assemblies 5, and weight-removing column reflux includes weight-removing column reflux pump 83, weight-removing column return tank 73 and de- weight
Column overhead condenser 63, weight-removing column top are connected by pipeline with weight-removing column overhead condenser 63, weight-removing column overhead condenser 63
It is connected with weight-removing column return tank 73, weight-removing column return tank 73 is connected with weight-removing column reflux pump 83, weight-removing column reflux pump 83 and fourth two
Anhydride product extraction pipe 44 connects.
The lower end of weight-removing column is provided with succinic anhydride heavy constituent extraction pipe 41, and succinic anhydride heavy constituent extraction pipe 41 is provided with de-
Weight tower forced circulation pump 42, weight-removing column lower end are provided with weight-removing column reboiler 43, under one end and weight-removing column of weight-removing column reboiler 43
End connection, de- again except the other end of tower reboiler 43 connects with succinic anhydride heavy constituent extraction pipe 41, weight-removing column reboiler 43 is adopted
Use downward film evaporator.
Vacuum system 9 is respectively equipped with the top of lightness-removing column, de- butyrolactone tower and weight-removing column, the vacuum system is respectively with taking off gently
Tower reflux, de- butyrolactone tower reflux connect with weight-removing column reflux, and vacuum system includes high-vacuum pump 91, Gao Zhen
The import of empty pump 91 is connected with lightness-removing column reflux, butyrolactone removing tower reflux and weight-removing column reflux respectively, tool
Body, for lightness-removing column reflux, the import of high-vacuum pump 91 and the lightness-removing column return tank of lightness-removing column reflux and take off
Light column overhead condenser connection；For butyrolactone removing tower reflux, import and the butyrolactone removing tower of high-vacuum pump 91
The butyrolactone removing tower return tank of reflux connects with butyrolactone removing tower overhead condenser；Weight-removing column reflux is come
Say, the import of high-vacuum pump 91 is connected with the weight-removing column return tank of weight-removing column reflux and weight-removing column overhead condenser.
The outlet of high-vacuum pump 91 is connected with knockout drum 92, and high-vacuum pump 91 is using butyrolactone as pendular ring, Gao Zhen
Empty pump 91 is connected by butyrolactone pipeline 94 with knockout drum 92, and butyrolactone pipeline 94 is provided with freezing water- to-water heat exchanger 93, gas
The upper end of liquid knockout drum 92 is provided with non-condensable gas pipeline 921, and knockout drum lower end is provided with butyrolactone recovery channel 922.
The course of work of the present utility model is as follows：
Cis-butenedioic anhydride solution adds from hydrogenation pump entry, enters after recirculation cooler cools down at the top of hydrogenation reactor
Enter, fresh hydrogen of the hydrogen from device for producing hydrogen is pressurized to 5-7 MPaG through make-up hydrogen compressor, and circulating hydrogen compressor outlet is closed
And circulating hydrogen compressor entrance, recycle hydrogen are delivered to after gas-liquid separation through cooling together into hydrogenation reactor, the hydrogen of discharge
System at regular intervals carries out hydrogen purity analysis, when hydrogen purity is less than 98%, can improve H by tail gas regulating valve waste discharge hydrogen2It is pure
Degree；
Succinic anhydride crude product enters lightness-removing column via discharge pipe and is used for removing hydrogen, tetrahydrofuran, moisture and light
The light components such as the alcohol of matter, a portion succinic anhydride crude product are mixed with cis-butenedioic anhydride solution via hydrogenation circulating pump and circulating cooling
Returned herein at the top of hydrogenation reactor after device cooling；
The succinic anhydride crude product come out from lightness-removing column enters butyrolactone removing tower and is used for removing in succinic anhydride crude product
Butyrolactone, the succinic anhydride crude product come out from butyrolactone removing tower enters weight-removing column and is used for removing heating process and reacting
Caused heavy constituent in journey, in the qualified succinic anhydride of weight-removing column overhead extraction, then through membrane separation, further remove fourth two
Butyrolactone in acid anhydrides, so as to which the purity of succinic anhydride certified products is brought up into more than 99.86%.
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.This
The technical staff of industry is retouched in above-described embodiment and specification it should be appreciated that the utility model is not restricted to the described embodiments
That states simply illustrates principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model
Various changes and modifications are also had, these changes and improvements are both fallen within claimed the scope of the utility model.This practicality is new
Scope is claimed by appended claims and its equivalent thereof in type.
Claims (9)
1. a kind of cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：Including hydrogenation reactor
（1）And make-up hydrogen compressor（17）, make-up hydrogen compressor（17）By new hydrogen pipeline（13）With hydrogenation reactor（1）Connection, hydrogenation are anti-
Answer device（1）Top is provided with cis-butenedioic anhydride solution line（12）, hydrogenation reactor（1）Top is provided with hydrogen gas return line（14）, hydrogen backflow
Pipe（14）With new hydrogen pipeline communication, the hydrogen gas return line（14）It is provided with circulating hydrogen compressor（16）, the hydrogenation reactor
（1）Lower end pass through discharge pipe（19）With lightness-removing column（2）Middle part connection, lightness-removing column（2）Top provided with lightness-removing column flow back
Device and light component extraction pipe（24）, lightness-removing column（2）Lower end pass through pipeline I（21）With butyrolactone removing tower（3）Middle part connect
Connect, butyrolactone removing tower（3）Top be provided with butyrolactone removing tower reflux and butyrolactone extraction pipe（34）, butyrolactone removing
Tower（3）Lower end pass through pipeline II（31）With weight-removing column（4）Middle part connection, weight-removing column（4）Top provided with weight-removing column flow back
Device and succinic anhydride product extraction pipe（44）, succinic anhydride product extraction pipe（44）It is provided with membrane separation assemblies（5）, weight-removing column
（4）Lower end be provided with succinic anhydride heavy constituent extraction pipe（41）, the lightness-removing column, de- butyrolactone tower and weight-removing column top are set respectively
There is vacuum system（9）, the vacuum system（9）Respectively with lightness-removing column reflux, de- butyrolactone tower reflux and weight-removing column
Reflux connects.
2. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The cis-butenedioic anhydride solution line（12）It is provided with hydrogenation circulating pump（10）And recirculation cooler（11）, the cis-butenedioic anhydride solution line（12）
With discharge pipe（19）Connection, discharge pipe（19）It is provided with check valve（191）.
3. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The hydrogen gas return line（14）It is provided with recycle hydrogen knockout drum（20）, recycle hydrogen knockout drum（20）It is arranged on recycle hydrogen
Compressor（16）Upstream, recycle hydrogen knockout drum（20）Give up hydrogen discharge pipe for upper end（15）, provided with the hydrogen gas return line
（14）With useless hydrogen discharge pipe（15）Connection, the useless hydrogen discharge pipe（15）It is provided with tail gas regulating valve（18）.
4. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The new hydrogen pipeline is responsible for by new hydrogen（131）With four new hydrogen branch pipes（132）Composition, new hydrogen supervisor（131）With four new hydrogen branch
Pipe（132）Connection, four new hydrogen branch pipes（132）By order from top to bottom and hydrogenation reactor（1）Connection.
5. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The pipeline I（21）It is provided with lightness-removing column forced circulation pump（22）, the lightness-removing column lower end is provided with lightness-removing column reboiler（23）, take off
Light tower reboiler（23）One end be connected with lightness-removing column lower end, lightness-removing column reboiler（23）The other end and pipeline I（21）Connection,
The lightness-removing column reboiler（23）Using downward film evaporator.
6. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The pipeline II（31）It is provided with butyrolactone removing tower forced circulation pump（32）, the butyrolactone removing tower lower end is provided with butyrolactone
Removing tower reboiler（33）, butyrolactone removing tower reboiler（33）One end be connected with butyrolactone removing tower lower end, butyrolactone takes off
Except tower reboiler（33）The other end and pipeline II（31）Connection, the butyrolactone removing tower reboiler（33）Steamed using falling film type
Send out device.
7. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The succinic anhydride heavy constituent extraction pipe（41）It is provided with weight-removing column forced circulation pump（42）, the weight-removing column lower end is provided with de- weight
Tower reboiler（43）, weight-removing column reboiler（43）One end be connected with weight-removing column lower end, it is de- to remove tower reboiler again（43）It is another
Managed with the extraction of succinic anhydride heavy constituent at end（41）Connection, the weight-removing column reboiler（43）Using downward film evaporator.
8. cis-butenedioic anhydride direct hydrogenation according to claim 1 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The lightness-removing column reflux includes lightness-removing column reflux pump（81）, lightness-removing column return tank（71）With lightness-removing column overhead condenser
（61）, lightness-removing column top passes through pipeline and lightness-removing column overhead condenser（61）Connection, lightness-removing column overhead condenser（61）It is light with taking off
Tower return tank（71）Connection, lightness-removing column return tank（71）With lightness-removing column reflux pump（81）Connection, lightness-removing column reflux pump（81）With it is light
Component extraction pipe（24）Connection；The butyrolactone removing tower reflux includes butyrolactone removing tower reflux pump（82）, butyrolactone
Removing tower return tank（72）With butyrolactone removing tower overhead condenser（62）, butyrolactone removing tower top passes through pipeline and butyrolactone
Removing tower overhead condenser（62）Connection, butyrolactone removing tower overhead condenser（62）With butyrolactone removing tower return tank（72）Even
Connect, butyrolactone removing tower return tank（72）With butyrolactone removing tower reflux pump（82）Connection, butyrolactone removing tower reflux pump（82）
Produce and manage with butyrolactone（34）Connection；The weight-removing column reflux includes weight-removing column reflux pump（83）, weight-removing column return tank
（73）With weight-removing column overhead condenser（63）, weight-removing column top passes through pipeline and weight-removing column overhead condenser（63）Connection, take off weight
Column overhead condenser（63）With weight-removing column return tank（73）Connection, weight-removing column return tank（73）With weight-removing column reflux pump（83）Even
Connect, weight-removing column reflux pump（83）Produce and manage with succinic anhydride product（44）Connection.
9. cis-butenedioic anhydride direct hydrogenation according to claim 8 prepares the production system of high purity butylene dicarboxylic anhydride, it is characterised in that：
The vacuum system includes high-vacuum pump（91）, high-vacuum pump（91）Import taken off respectively with lightness-removing column reflux, butyrolactone
Except tower reflux connects with weight-removing column reflux, the outlet of high-vacuum pump and knockout drum（92）Connection, the Gao Zhen
Empty pump（91）Butyrolactone pipeline is passed through as pendular ring, high-vacuum pump using butyrolactone（94）With knockout drum（92）Connection, fourth
Lactone pipeline is provided with freezing water- to-water heat exchanger（93）, described knockout drum（92）Upper end is provided with non-condensable gas pipeline（921）, gas
Liquid knockout drum（92）Lower end is provided with butyrolactone recovery channel（922）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032255.1U CN207031313U (en) | 2017-08-17 | 2017-08-17 | Cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride |
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| CN201721032255.1U CN207031313U (en) | 2017-08-17 | 2017-08-17 | Cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride |
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| CN201721032255.1U Expired - Fee Related CN207031313U (en) | 2017-08-17 | 2017-08-17 | Cis-butenedioic anhydride direct hydrogenation prepares the production system of high purity butylene dicarboxylic anhydride |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761940A (en) * | 2019-03-18 | 2019-05-17 | 淄博齐翔腾达化工股份有限公司 | Crude maleic anhydride continuous rectification apparatus and process |
| CN113354605A (en) * | 2021-06-04 | 2021-09-07 | 常茂生物化学工程股份有限公司 | Separation device and process for maleic anhydride hydrogenation product |
| CN114426529A (en) * | 2021-12-31 | 2022-05-03 | 大连理工大学 | High-selectivity production process for preparing succinic anhydride by maleic anhydride liquid-phase hydrogenation |
| CN114425287A (en) * | 2022-01-28 | 2022-05-03 | 山东海成石化工程设计有限公司 | System and method for producing succinic anhydride by using maleic anhydride as raw material |
| WO2023071938A1 (en) * | 2021-10-27 | 2023-05-04 | 中国石油化工股份有限公司 | Maleic anhydride hydrogenation method and succinic acid production method comprising same |
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2017
- 2017-08-17 CN CN201721032255.1U patent/CN207031313U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761940A (en) * | 2019-03-18 | 2019-05-17 | 淄博齐翔腾达化工股份有限公司 | Crude maleic anhydride continuous rectification apparatus and process |
| CN113354605A (en) * | 2021-06-04 | 2021-09-07 | 常茂生物化学工程股份有限公司 | Separation device and process for maleic anhydride hydrogenation product |
| CN113354605B (en) * | 2021-06-04 | 2023-07-21 | 常茂生物化学工程股份有限公司 | Separation device and process for maleic anhydride hydrogenation product |
| WO2023071938A1 (en) * | 2021-10-27 | 2023-05-04 | 中国石油化工股份有限公司 | Maleic anhydride hydrogenation method and succinic acid production method comprising same |
| CN114426529A (en) * | 2021-12-31 | 2022-05-03 | 大连理工大学 | High-selectivity production process for preparing succinic anhydride by maleic anhydride liquid-phase hydrogenation |
| CN114425287A (en) * | 2022-01-28 | 2022-05-03 | 山东海成石化工程设计有限公司 | System and method for producing succinic anhydride by using maleic anhydride as raw material |
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