CN209081774U - The device of acetaldehyde impurities in a kind of removing acetic acid - Google Patents
The device of acetaldehyde impurities in a kind of removing acetic acid Download PDFInfo
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Abstract
The device of acetaldehyde impurities in a kind of removing acetic acid, inlet, the venthole of the first, second, third reboiler, which are separately connected, just divides tower, first recovery column, the material outlet of second recovery column, vapour phase entrance；The air inlet of first, second, third condenser is connect with the vapor phase exit of tower, first recovery column, second recovery column is just divided respectively, and condensate outlet just divides the refluxing opening of tower, first recovery column, second recovery column by the connection of the first, second, third return tank；The material inlet of mixing reactor connects the liquid-phase outlet of the first return tank, the material inlet of the material outlet connection first recovery column of mixing reactor；The material inlet of the discharge outlet connection second recovery column of first recovery column；The additive entrance of the discharge outlet connection mixing reactor of second recovery column.Which solves the exceeded problems of acetaldehyde in acetate products.
Description
Technical field
The utility model belongs to separation technology field, and in particular to a kind of device for removing acetaldehyde impurities in acetic acid, especially
It is related to the device of acetaldehyde impurities in a kind of removing acetic acid of achievable automatic operation.
Background technique
In acetic synthesis method used at present, commercially it is most useful that the carbonylation method of methanol and carbon monoxide.
Although the carbonylation method for manufacturing acetic acid reduces the by-product of carbon dioxide, hydrogen and propionic acid etc, also increase usually
With the amount of other impurity existing for trace, and works as and attempt to improve productivity by improving catalyst or changing reaction condition
When, acetic acid quality will receive damage.These trace impurities can seriously affect acetic acid quality, such as can reduce the permanganate of acetic acid
It is time, particularly true when they are re-circulated into reaction.These impurity include carbonyls and beta-unsaturated carbonyl compounds,
Such as acetaldehyde.
Currently, removing deimpurity traditional technology includes handling acetic acid with oxidant, ozone, water, methanol, active carbon, amine etc.
Product, which can distill with acetic acid combines.Most typical purification processes include a series of steamings to final product
It evaporates.However, increase process costs to the extra process of final product, and processed acetic acid product will form it is other miscellaneous
Matter.Although the acetic acid of opposite high-purity can be obtained, produced by the acetic acid that low water carbonylation method and purification processes are formed
Object is typically due to the residual impurity there are small scale and still slightly has deficiency in terms of permanganate time.Due to sufficient permanganic acid
The salt time is important business exercise, therefore does not allow to have the impurity for reducing permanganate time in acetic acid product.In addition,
It is being economically or commercially infeasible for removing micro impurity from acetic acid by distillation, because some impurity have and acetic acid
The close boiling point of product.
Therefore, it is necessary to research and develop, a kind of determination is economically feasible, is not polluting final product or is not increasing unnecessary cost
In the case where remove the side that methanol and carbon monoxide prepare the carbonyl impurities generated in the carbonylation process of acetic acid especially acetaldehyde
Method and device.
Summary of the invention
The purpose of this utility model is to provide a kind of devices of acetaldehyde impurities in removing acetic acid, and design is simple, at low cost,
And high treating effect, improve the index of quality and economic benefit of acetate products.
To achieve the above purpose, the technical solution of the present invention is:
The device of acetaldehyde impurities in a kind of removing acetic acid comprising: just divide tower, first recovery column, second recovery column,
One, second, third reboiler, the first, second, third condenser, the first, second, third return tank, mixing reactor；
Described just tower, first recovery column, second recovery column to be divided to set vapor phase exit at top respectively, middle and upper part sets material and enters
Mouthful, top sets refluxing opening, and lower part is equipped with vapour phase entrance, and bottom is respectively equipped with material outlet, discharge outlet；The discharge for just dividing tower
Mouth connects material source to be processed by pipeline；
Inlet, the venthole of first, second, third reboiler, which pass through pipeline respectively and connect, described just divides tower, the
One recovery tower, the material outlet of second recovery column, vapour phase entrance；
The air inlet of first, second, third condenser by pipeline respectively with it is described just divide tower, first recovery column,
The vapor phase exit of second recovery column connects, and condensate outlet is by pipeline the first, second, third return tank of connection, and described the
One, second, third return tank is equipped with the first, second liquid-phase outlet, and the first liquid phase of first, second, third return tank goes out
Mouth flows back into the refluxing opening for just dividing tower, first recovery column, second recovery column by pipeline respectively；
The mixing reactor is equipped with material inlet, desalination water inlet, additive entrance, material outlet, and the mixing is anti-
The material inlet of device is answered to connect the first liquid-phase outlet of first return tank by pipeline, the material of the mixing reactor goes out
Mouth connects the material inlet of the first recovery column by pipeline；
The discharge outlet for just dividing tower, the discharge outlet of the first recovery column connect the second recovery column by pipeline
Material inlet；The discharge outlet of the second recovery column connects the additive entrance of the mixing reactor by a feed pump.
Further, the material inlet of the mixing reactor, desalination water inlet, additive entrance are total by a common conduit
With an entrance.
For the discharge outlet of the second recovery column by the first entrance of pump one storage tank of connection, the outlet of the storage tank passes through one
Pump connects the additive entrance of the mixing reactor；The storage tank is additionally provided with the second entrance being added for additive.
Again, first, second, third condenser is additionally provided with gas discharge outlet.
First, second liquid-phase outlet of the first, second, third return tank described in the utility model is total by a common conduit
With an outlet.
Acetic acid full gear device provided by the utility model, which can be applied to be melted into methanol carbonyl in acetic acid plant, takes off light reflux
The material (the high acetic acid product of aldehyde contenting amount) that pump is drawn carries out full gear processing, specifically, first point of acetic acid product warp that aldehyde contenting amount is high
Tower material inlet enters the middle and upper part for just dividing tower, falls into and the material of tower bottom is just divided to enter the first reboiler, through the first reboiler
Heating makes material evaporation, and vapor-phase material carries out mass-and heat-transfer, the vapour phase of top of tower with tower charging, overhead reflux is just divided after evaporation
(the high light component of aldehyde contenting amount) is condensed into the first condenser, and condensation material a part is back to just point column overhead, another part
Condensation material enters mixing reactor；The active principles such as acetic acid, water, the catalyst of tower bottom are just divided tower discharge outlet to return to first
Quantizer is recycled in alcohol, carbon monoxide synthesis acetic acid plant.Additive, which is pumped, quantitatively to be sent to mixing reactor, desalination
Water enters mixing reactor through desalination water inlet, and material, desalted water, additive are condensed in mixing reactor and carries out reaction removing
Acetaldehyde.Reacting rear material feeds in first recovery column middle and upper part and carries out active principle recycling in first recovery column, the first recycling
Tower bottom material evaporates material and is passed with the charging of first recovery column middle and upper part, overhead reflux through the second reboiler heating evaporation
Matter heat transfer, overhead vapor phase are condensed through the second condenser, and condensate liquid a part is back to first recovery column tower top, after a part export
The quantizer for being delivered to acetic acid plant is recycled, and it is inverse that first recovery column kettle material is delivered to progress in second recovery column
Additive therein is recycled to reaction, second recovery column tower top reproducibility compound is sent out battery limit (BL) and is further processed.
The utility model has the beneficial effects that
Device provided by the utility model solves the problems, such as that acetaldehyde is exceeded in acetate products, while acetic acid greatly improved
The potassium permanganate recovery time of product, the product quality of acetic acid is helped to improve, is obviously improved the market competitiveness of acetate products.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment to extremely low temperature pipe line steel described in the utility model and
Its manufacturing method makes further explanation, however the explanation and illustration is not constituted the technical solution of the utility model
Improper restriction.
Referring to Fig. 1, the device of impurity acetaldehyde in removing acetic acid provided by the utility model comprising: just divide tower 1, first
Recovery tower 2, second recovery column 3, the first reboiler 4, the second reboiler 4 ', third reboiler 4 ", the first condenser 5, second are cold
Condenser 5 ', third condenser 5 ", the first return tank 6, the second return tank 6 ', third return tank 6 ", mixing reactor 7；
It is described just divide tower 1, first recovery column 2, second recovery column 3 to set vapor phase exit 11/21/31 at top respectively, on
Portion sets material inlet 12/22/32, and top sets refluxing opening 13/23/33, and lower part is equipped with vapour phase entrance 14/24/34, and bottom is set respectively
There are material outlet 15/25/35, discharge outlet 16/26/36；
The inlet 41 of first reboiler 4, venthole 42 are connected by pipeline respectively described just divides the material of tower 1 to go out
Mouth 15, vapour phase entrance 14；Inlet 41 ', the venthole 42 ' of second reboiler 4 ' connect described first by pipeline respectively
Material outlet 25, the vapour phase entrance 24 of recovery tower 2；Inlet 41 ", the venthole 42 " of the third reboiler 4 " pass through respectively
Pipeline connects the material outlet 35 of the second recovery column 3, vapour phase entrance 34；
The air inlet 51 of first condenser 5 just divides the vapor phase exit 11 of tower 1 to connect by pipeline with described, cold
Condensate outlet 52 connects the first return tank 6 by pipeline；First return tank 6 is equipped with the first, second liquid-phase outlet 61/62, described
First liquid-phase outlet 61 of the first return tank 6 flows back into the refluxing opening 13 for just dividing tower 1 by pipeline；
The air inlet 51 ' of second condenser 5 ' is connect by pipeline with the vapor phase exit 21 of the first recovery column 2,
Its condensate outlet 52 ' connects the second return tank 6 ' by pipeline；Second return tank 6 ' is equipped with the first, second liquid-phase outlet
61 '/62 ', the first liquid-phase outlet 61 ' of second return tank 6 " flows back into returning for the first recovery column 2 by pipeline
Head piece 23；
The air inlet 51 " of the third condenser 5 " is connect by pipeline with the vapor phase exit 31 of the second recovery column 3,
Its condensate outlet 52 " connects third return tank 6 " by pipeline；Third return tank 6 " be equipped with the first, second liquid-phase outlet 61 "/
62 ", the first liquid-phase outlet 61 " of the third return tank 6 " flows back into the refluxing opening of the second recovery column 3 by pipeline
33；
The mixing reactor 7 is equipped with material inlet 71, desalination water inlet 72, additive entrance 73, material outlet 74, institute
The material inlet 71 for stating mixing reactor 7 connects the second liquid phase outlet 62 of first return tank 6, the mixing by pipeline
The material outlet 74 of reactor 7 connects the material inlet 22 of the first recovery column 2 by pipeline；
The discharge outlet 26 of the first recovery column 2 connects the material inlet 32 of the second recovery column 3 by pipeline；It is described
The discharge outlet 36 of second recovery column 3 connects the additive entrance 73 of the mixing reactor 7 by a feed pump 8.
Further, the discharge outlet 36 of the second recovery column 3 connects the first entrance 91 of a storage tank 9 by feed pump 8,
The outlet 92 of the storage tank connects the additive entrance 73 of the mixing reactor 7 by a pump；The storage tank 9 is additionally provided with for adding
The second entrance 93 for adding agent to be added.
Material inlet 71, desalination water inlet 72, the additive entrance 73 of the mixing reactor 7 are total by a common conduit
With an entrance.
Again, first, second, third condenser 5/5 '/5 " further respectively has gas discharge outlet 53/53 '/53 ".
First, second liquid-phase outlet 61/62 of the first, second, third return tank 6/6 '/6 " described in the utility model,
61 '/62 ', 61 "/62 " share an outlet by a common conduit respectively.
The full gear device of the utility model can be used for there are group VIII metallic catalyst and iodide cocatalysts
In the case of by methanol (or another reactant that can be carbonylated, such as methyl acetate, methyl formate or dimethyl ether or its mixing
Object) carbonyl chemical conversion acetic acid the resulting product of any method (the high diluted acid of aldehyde contenting amount) carry out removing acetaldehyde impurities.
When the present embodiment is implemented:
(1) methanol, carbon monoxide are synthesized into acetic acid plant) in lightness-removing column top gas mutually combine just cold with end it is cold in condenser
Solidifying gas phase acetic acid stream, and by its two-phase separation to form heavy liquid phase product and light liquid phase product；De- light reflux pump discharge draws
One 1 material inlet 12 of material (the high diluted acid of aldehyde contenting amount) Jing Chufen tower enters the middle and upper part for just dividing tower 1, falls into and just divides tower 1 bottom
The material in portion enters the first reboiler 4 through material outlet 15, makes material evaporation through the heating of the first reboiler 4, vapour phase object after evaporation
Material is returned through gas phase entrance 14 just to be divided tower 1 and tower charging, overhead reflux material is just divided to carry out mass-and heat-transfer, the vapour phase of top of tower
(the high light component of aldehyde contenting amount) enters the first condenser 5 through vapor phase exit 11 and condenses, and condensation produt material flows are cold to the first return tank 6
Condensate material a part passes through again is just divided 1 refluxing opening 13 of tower to divide tower 1 tower top at the beginning of being back to, and another part condenses material, and (aldehyde contenting amount is high
Light component) enter mixing reactor 7；The active principles such as the acetic acid, water, catalyst of 1 tower bottom of tower are just divided just tower 1 to be divided to discharge
The quantizer that mouth 16 returns to methanol, carbon monoxide synthesizes in acetic acid plant recycles.
(2) additive enters in storage tank 9 through 9 second entrance 93 of storage tank, then by pump through 7 additive entrance of mixing reactor
73 quantitatively send to mixing reactor 7, and desalted water enters mixing reactor 7 through desalination water inlet 72, includes aldehyde in mixing reactor 7
It measures high light component, desalted water, additive and carries out reaction removing acetaldehyde.Reacting rear material enters in 2 top material of first recovery column
22 charging of mouth carries out active principle recycling in first recovery column 2, and tower bottom liquid phase is through 4 ' heating evaporation of the second reboiler, evaporation
Material enters first recovery column 2 through 2 vapour phase entrance 24 of first recovery column and feeds in 2 middle and upper part of first recovery column, overhead reflux
Object carries out mass-and heat-transfer, and overhead vapor phase enters the second condenser 5 ' through 2 vapor phase exit 21 of first recovery column and condenses, and condensate liquid one
The second return tank of lease making 6 ' is back to 2 tower top of first recovery column, another part be delivered to after the export of the second condenser 5 ' methanol,
Quantizer in carbon monoxide synthesis acetic acid plant is recycled, and 2 kettle material of first recovery column is conveyed through discharge outlet 26
Backward reaction is carried out in second recovery column 3 and recycles additive therein, and 3 tower top of second recovery column is through vapor phase exit 31
It is condensed into third condenser 5 ", condensate liquid a part is back to 2 tower top of first recovery column, another portion through third return tank 6 " again
Divide condensate liquid (wherein 90% is reproducibility compound aldoketones) to send out battery limit (BL) to be further processed；3 materials at bottom of tower of second recovery column
Through discharge outlet 36 by 8 pressurized delivered of feed pump to storage tank 9, then it is delivered to mixing reactor 7 and is recycled.
In the present embodiment, first condenser 5, the second condenser 5 ', third condenser 5 " are additionally provided with gas discharge outlet
53/53 '/53 ", which is connected to flare system by pipeline, and the first condenser 5, second is condensed
Minimal amount of incondensable gas is delivered to flare system and carries out burning processing in device 5 ', third condenser 5 ".
Although describing the utility model referring to embodiment, those skilled in the art can significantly be become
Dynamic and replacement.It particularly, can be according to although mutually having generally described the utility model using lightness-removing column light fraction above
The utility model handles any logistics containing high concentration reproducibility compound and alkyl iodide in carbonylation process.Therefore, this reality
With the novel all such variations and replacement being entirely included within the scope of following claims or its counterpart.
Claims (5)
1. the device of acetaldehyde impurities in a kind of removing acetic acid comprising: just divide tower, the first, second recovery tower, first, second, the
Three reboilers, the first, second, third condenser, the first, second, third return tank, mixing reactor；
Described just tower, first recovery column, second recovery column to be divided to set vapor phase exit at top respectively, middle and upper part sets material inlet, on
Portion sets refluxing opening, and lower part is equipped with vapour phase entrance, and bottom is respectively equipped with material outlet, discharge outlet；The discharge outlet for just dividing tower is logical
Piping connects material source to be processed；
Inlet, the venthole of first, second, third reboiler, which pass through pipeline respectively and connect, described just divides tower, first time
Receive tower, the material outlet of second recovery column, vapour phase entrance；
The air inlet of first, second, third condenser just divides tower, first recovery column, second with described respectively by pipeline
The vapor phase exit of recovery tower connects, and condensate outlet is by pipeline the first, second, third return tank of connection, and described first, the
Two, third return tank is equipped with the first, second liquid-phase outlet, and the first liquid-phase outlet of first, second, third return tank is distinguished
The refluxing opening for just dividing tower, first recovery column, second recovery column is flowed back by pipeline；
The mixing reactor is equipped with material inlet, desalination water inlet, additive entrance, material outlet, the mixing reactor
Material inlet the first liquid-phase outlet of first return tank is connected by pipeline, the material outlet of the mixing reactor is logical
Piping connects the material inlet of the first recovery column；
The discharge outlet of the first recovery column connects the material inlet of the second recovery column by pipeline；The second recovery column
Discharge outlet the additive entrance of the mixing reactor is connected by a feed pump.
2. the device of acetaldehyde impurities in removing acetic acid according to claim 1, which is characterized in that the mixing reactor
Material inlet, desalination water inlet, additive entrance share an entrance by a common conduit.
3. the device of acetaldehyde impurities in removing acetic acid according to claim 1, which is characterized in that the second recovery column
For discharge outlet by the first entrance of pump one storage tank of connection, the outlet of the storage tank connects adding for the mixing reactor by a pump
Add agent entrance；The storage tank is additionally provided with the second entrance being added for additive.
4. the device of acetaldehyde impurities in removing acetic acid according to claim 1, which is characterized in that described first, second, the
Three condensers are additionally provided with gas discharge outlet.
5. the device of acetaldehyde impurities in removing acetic acid according to claim 1, which is characterized in that described first, second, the
First, second liquid-phase outlet of three return tanks shares an outlet by a common conduit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821440253.0U CN209081774U (en) | 2018-09-04 | 2018-09-04 | The device of acetaldehyde impurities in a kind of removing acetic acid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821440253.0U CN209081774U (en) | 2018-09-04 | 2018-09-04 | The device of acetaldehyde impurities in a kind of removing acetic acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872223A (en) * | 2018-09-04 | 2020-03-10 | 河南顺达新能源科技有限公司 | Device of acetaldehyde impurity in desorption acetic acid |
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- 2018-09-04 CN CN201821440253.0U patent/CN209081774U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872223A (en) * | 2018-09-04 | 2020-03-10 | 河南顺达新能源科技有限公司 | Device of acetaldehyde impurity in desorption acetic acid |
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