CN204237037U - Rough acrylonitrile holding vessel - Google Patents
Rough acrylonitrile holding vessel Download PDFInfo
- Publication number
- CN204237037U CN204237037U CN201420301627.6U CN201420301627U CN204237037U CN 204237037 U CN204237037 U CN 204237037U CN 201420301627 U CN201420301627 U CN 201420301627U CN 204237037 U CN204237037 U CN 204237037U
- Authority
- CN
- China
- Prior art keywords
- rough
- acrylonitrile
- tank
- holding vessel
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000002253 acid Substances 0.000 claims abstract description 19
- 230000008676 import Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 36
- 230000008569 process Effects 0.000 abstract description 30
- 238000003860 storage Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000007788 liquid Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000003112 inhibitor Substances 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 6
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 230000007306 turnover Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- KGQLBLGDIQNGSB-UHFFFAOYSA-N benzene-1,4-diol;methoxymethane Chemical compound COC.OC1=CC=C(O)C=C1 KGQLBLGDIQNGSB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The disclosure relates to rough acrylonitrile holding vessel, and provides a kind of process of the storage for maintaining the rough acrylonitrile in rough tank.Described process comprises: described rough acrylonitrile is transferred to described rough tank; Add acid to the rough acrylonitrile in described rough tank, the amount of the acid added is suitable for pH value to be maintained in lower than target ph; Be maintained in lower than target temperature with by the temperature of the rough acrylonitrile in described rough tank.
Description
Technical field
The disclosure relates to the technique of the improvement when manufacturing acrylonitrile and methacrylonitrile.Particularly, the disclosure relates to the operation of rough acrylonitrile tank.
Background technology
Acrylonitrile is important commodity chemicals, and it is mainly by as monomer, for the manufacture of multiple polymers material, such as, for the poly-mer of the acrylic fiber in textiles and resin (such as ABS and SAN resin).Worldwide, annual acrylonitrile quantity of producing is more than 4,000,000 tonnes.The most frequently used technique manufacturing acrylonitrile or other alkene unsaturated nitriles (such as methacrylonitrile) uses air or other source of molecular oxygen to make suitable hydro-carbon in ammonia oxidation reactor, chemical reaction occur when having ammonia as oxidizer, such as make propylene or propane generation chemical reaction for manufacture acrylonitrile, or make isobutylene generation chemical reaction for manufacture methacrylonitrile.Solid granular in this kinds of oxidation reaction (also referred to as ammoxidation reaction) usual use fluidization catalyst bed mixes catalyst to be carried out catalytic ammoxidation reaction and provides desired acrylonitrile or methacrylonitrile with acceptable conversion ratio and output.Except producing alkene unsaturated nitrile, this ammoxidation reaction also produces other products usually, such as acetonitrile, hydrogen cyanide (HCN) and other side productions.The technique of reacting to the catalytic ammoxidation of acrylonitrile for hydrocarbon material is at such as U.S. Patent No. 4,503,001, No. 4,767,878, No. 4,863,891 and No. 5,093, and open in 299, these patents are incorporated herein by reference.
Importantly acrylonitrile product meets some specifications, comprises the maximum level of some chemical impurity and the predetermined content of water and polymer inhibitor.The water of acrylonitrile product and the control of polymeric composition are important for the stability of acrylonitrile product.Water in acrylonitrile product and hydroquinone monomethyl ether (monomethyl ether hydroquinone) or quinhydrones methyl ether (methyl ether of hydroquinone) (being hereinafter called " MEHQ ") polymer inhibitor must be maintained in specified level or scope usually.MEHQ polymer inhibitor needs a certain amount of water to play function and to suppress the less desirable polymerization of acrylonitrile product.The such as specification of the U.S. and international transport specification and so on requires in acrylonitrile product, transport minimum water and inhibitor usually, because when not having a certain amount of water and inhibitor, acrylonitrile product is fairly attack.Described specification also has the maximum of water and inhibitor composition usually because too much water and inhibitor will make such as slack-off at the subsequent reactions of the expectation of the acrylonitrile being designed to make the client factory of acrylonitrile polymerization to locate or become difficulty.The specification of acrylonitrile product generally specify the maximum of some impurity, such as hydrogen cyanide, acetonitrile and acetone.
Non-refining or off-grade may be needed once in a while to be placed on and to keep in tank.At this time, may need rough acrylonitrile tank place in operation, be used as the maintenance tank of non-refining or off-grade.
Although the manufacture of acrylonitrile/methacrylonitrile commercialization implements for many years, but still there is the place that some improvement can have remarkable benefit.Rough acrylonitrile from recovery post generally includes acrylonitrile, cyanide and water and is not stablize especially.Therefore, rough acrylonitrile may be easy to polymerization reaction take place, thus loses acrylonitrile product.The process providing the rough acrylonitrile of actv. more tank to operate and equipment are useful, compare conventional process and equipment, and described process and equipment reduce or eliminates the loss of polymerization reaction and acrylonitrile product.
Following detailed description from illustrated embodiment of the present disclosure is become obvious by above and other aspects, features and advantages of the present disclosure, connection with figures should read illustrated embodiment.
Utility model content
Correspondingly, an aspect of the present disclosure be to provide a kind of safe, effectively and the process of cost-effective and equipment, it overcomes or reduces the shortcoming of conventional process and equipment.
Provide a kind of process of the storage for maintaining the rough acrylonitrile in rough tank.Described process comprises: described rough acrylonitrile is transferred to described rough tank; Add acid to the rough acrylonitrile in described rough tank, the amount of the acid added is suitable for pH value to be maintained in lower than target ph; Be maintained in lower than target temperature with by the temperature of the rough acrylonitrile in described rough tank.
On the other hand, a kind ofly to comprise with the process receiving rough acrylonitrile for the preparation of rough tank: add water to rough tank, the amount of the water added is suitable for absorbing the organic matter below floating top cover; The temperature of the water in described rough tank is maintained about 25 DEG C or lower; Be 4 or lower with described water being acidified to pH value.
On the other hand, a kind of rough acrylonitrile holding vessel comprises: multiple sensor, and it is configured to the temperature of the different temperatures At The Height detected in described rough acrylonitrile holding vessel; Remove position with multiple, it is configured to remove rough acrylonitrile from described rough acrylonitrile holding vessel.Described tank also comprises: pH sensor, and it is configured to the pH value of the rough acrylonitrile detected in described rough acrylonitrile holding vessel; Refrigerator, it is configured to cool the recirculation flow removing position extraction from described rough acrylonitrile holding vessel; And return line, what it was configured to make recirculation flow turns back to described rough acrylonitrile holding vessel at least partially.
Following detailed description from illustrated embodiment of the present disclosure is become obvious by above and other aspects, features and advantages of the present disclosure, connection with figures should read illustrated embodiment.
Accompanying drawing explanation
Consider that accompanying drawing can know more complete understanding and the advantage thereof of exemplary embodiment of the present disclosure by referring to following description, in the accompanying drawings, identical Reference numeral refers to identical feature, wherein:
Fig. 1 is the indicative flowchart being applicable to the embodiment according to aspect of the present disclosure manufacturing acrylonitrile product;
Fig. 2 shows the diagram of circuit of the process according to aspect of the present disclosure.
Detailed description of the invention
The monitoring and controlling of temperature and pH value is all important for the storage of rough acrylonitrile.In this respect, a kind of process comprises multiple temperature of the liquid at the differing heights place detecting rough tank.This process comprises: make the recirculation flow circulation highly extracted from the outflow of rough tank; Cool this recirculation flow; And work as detected temperature when being in outside predetermined temperature range, what make this recirculation flow turns back to this tank at least partially.
Compare conventional system and method, process time described herein is less and can need less step before acrylonitrile product is released to final products storage place.The work of laboratory and factory can be reduced when performing sample analysis and adjustment produces qualified acrylonitrile product with operating parameter.Other benefits provided are: quantity and/or the volume that can reduce impouring tank relative to the quantity of the impouring tank (rundown tank) needed for conventional system and method and/or volume.Another benefit provided is: can detect the inferior-quality acrylonitrile product of chemical impurity quickly, thus allows to perform correct operation and will again reduce to needed for conventional system and method through the amount of the acrylonitrile product of (one or more) part of system.
Below, this process and the equipment for performing this process is further described about accompanying drawing.
As shown in Figure 1, equipment 10 comprises tank 12.Tank 12 can be configured to receive rough acrylonitrile product via pipeline 16.Rough acrylonitrile stream 14 can be transferred to tank 12 by from recovery post or other container (not shown).Rough acrylonitrile product stream 14 can transmit via pipeline 16 and enter tank 12 in position 18.The correspondence that temperature sensor 20,22,24,26 and 28 can be configured to the liquid in tank 12 vertically measures the temperature of the liquid in tank 12 in height 30,32,34,36 and 38 place.Rough acrylonitrile product in tank 12 can be transferred to outside tank 12 via pipeline 40.Overhead vapor 110 can be transferred to scrubber (not shown) via pipeline 110 from tank 12.
Rough acrylonitrile product can be transmitted from tank 12 via pipeline 82,84,86 and/or 88.Valve 92,94,96 and 98 can correspond respectively to pipeline 82,84,86 and 88.Nozzle 102,104,106 and 108 can correspond respectively to pipeline 82,84,86 and 88.The vertical height of nozzle 102,104,106 and 108 in tank 12 can correspond respectively to the vertical height 32,34,36 and 38 of the liquid in tank 12.Nozzle in this series of spray nozzles and the distance of adjacent nozzle can be identical.Therefore, the distance between nozzle 102 and nozzle 104 can be identical with the distance between nozzle 104 and nozzle 106, etc.In one aspect, distance in succession between nozzle can be about two (2) to about ten two (12) feet, be about five (5) to about ten two (12) feet in yet another aspect, be about eight (8) to about ten two (12) feet in yet another aspect, and be about ten (10) feet in yet another aspect.Although the vertical height of nozzle 100 shown in Fig. 1 is lower than vertical height 30, nozzle 100 vertically highly can be identical with vertical height 30 or close to vertical height 30.
Rough acrylonitrile product can be transferred to heat exchanger or refrigerator 54 by pipeline 46, such as, be transferred to the pipe side of refrigerator 54 at import 56 place.Refrigerator 54 can be configured to via with cooling fluid 58(such as, cooling water expansion tank) heat trnasfer cool rough acrylonitrile product, cooling fluid 58 is introduced to the shell-side of refrigerator 54 at import 60 place.Cooling fluid 58 can discharge refrigerator 54 at outlet 62 place.
After cooled in refrigerator 54, rough acrylonitrile product can be discharged at outlet 64 place and transmit via pipeline 66 from refrigerator 54 as the acrylonitrile product stream 78 through cooling.Acid 68(such as glycollic acid or acetic acid and combination thereof) can transmit via pipeline 70 and add the rough acrylonitrile product in pipeline 66 at joint 74 place to.Acid 68 can by pump 72 from acid source 76 via pipeline 70 pumping.In one aspect, acid 68 can be added to through cooling acrylonitrile product stream 78 so that the pH value of the liquid in tank 12 is maintained predetermined pH value range.Acrylonitrile product through cooling can turn back to tank 12 via pipeline 80 by nozzle 100.
In one aspect, controller 11 can be configured to process the one or more signals corresponding to measured parameter (such as, the fluid temperature measured of temperature sensor 20,22,24,26 and/or 28 and vertically height 30,32,34,36 and/or 38).Controller 11 can be configured to determine that whether measured parameter is higher or lower than preassigned parameter scope.One of ordinary skill in the art would recognize that according to the disclosure, measured parameter can be any suitable parameter useful in the operation of tank 12, the temperature that such as temperature sensor is measured at predetermined vertical At The Height.If controller 11 can be configured to measured parameter below or above preassigned parameter scope, regulate the operation of one or more device via communication line or radio communication (Fig. 1 is not shown).Such as, controller 11 can be configured by and control the amount that the operation of refrigerator 54 and the operation of valve (such as valve 92,94,96 and/or 98) regulate the rough acrylonitrile product transmitted by one or more nozzle 100,102,104,106 and/or 108.
In one aspect, by recirculation, cooling and by through cooling acrylonitrile product mix with the liquid in tank 12, the temperature of the regional area of the liquid in the temperature of the liquid in tank 12 and/or tank 12 can be maintained in predetermined temperature range.In one aspect, controller 11 can be configured to control the liquid extracted from tank 12 via pipeline 40 amount, refrigerator 54 the rough acrylonitrile product of cooling amount and transmit the amount of getting back to the rough acrylonitrile product (after cooling) of tank 12 via pipeline 66.In this, recirculation can be used for the temperature in rough tank being set to about 25 DEG C or lower.In a related aspect, at 1 to about 5 position measuring tempeature, and in yet another aspect, at 2 to about 4 position measuring tempeature.In one aspect, this process can be used for the turnover rate providing about 50 to about 150 hours, the turnover rate of about 75 to about 125 hours in yet another aspect, about 75 to the turnover rates of about 80 hours in yet another aspect, and the turnover rates of about 100 to about 105 hours in yet another aspect.
In one aspect, controller 11 pH value that can be configured to process the liquid corresponded in tank 12 and/or one or more signals of the pH value of liquid of extracting from tank 12 via pipeline 40.In this, pH meter 116 can be configured to the pH value of the rough acrylonitrile product in position 120 place measurement tank 12 and will correspond to the Signal transmissions of measured pH value to controller 11 or flow controller 118.Controller 11 or flow controller 118 can be configured to the information that processes from pH meter and control to flow to the flow of the acid 68 of joint 74.In one aspect, if the pH value that controller 11 or flow controller 118 can be configured to measure at position 120 place is in outside predetermined pH value, the operating parameter relevant with the flow of the acid 68 flowing to joint 74 is at least regulated.In one aspect, controller 11 can be configured to the operation of control flow check amount controller 118.In one aspect, controller 11 can comprise flow controller 118.Controller 11 and/or flow controller 118 can comprise treater.The treater of controller 11 and/or flow controller 118 can comprise memory device, and this memory construction becomes to receive and stores predetermined condition or parameter.Predetermined condition or parameter can be the desired pH of liquid or the scope of desired pH at position 120 place.
In one aspect, controller 11 or flow controller 118 can be configured to receive with preset frequency the signal of pH value corresponding to pH meter 116 and measure, and within such as approximately every six (6) hours, receive once, and determine measured pH value whether in predetermined pH value range.In one aspect, predetermined pH value range can be about 2.5-4.5, and is about 3 to about 4 in yet another aspect.In one aspect, if measured pH value is greater than or close to about 4.5, then controller 11 or the adjustable opening corresponding to the valve 119 of flow controller 118 of flow controller 118, to allow to add more acid 68 at joint 74 place, thus allows to add more acid 68 to tank 12.If the pH value measured at position 120 place is about 2.5 or close to about 2.5, then controller 11 or the adjustable opening corresponding to the valve 119 of flow controller 118 of flow controller 118, to reduce the amount of the acid 68 added at joint 74 place, thus reduce the amount of the acid 68 added to tank 12.
As shown in Figure 1, the effluent pipeline 40 can be extracted from the bottom of tank 12 at position 43 place.Relative to the bottom-to-top-height of tank 12, the vertical of position 43 can be highly zero or about zero.In one aspect, the length of rough acrylonitrile holding vessel and the ratio of diameter are about 0.5 to about 1.5, are about 0.75 to about 1.25 in yet another aspect, and are about 0.9 to about 1.1 in yet another aspect.
Fig. 2 shows the diagram of circuit of the process 300 according to aspect of the present disclosure.The equipment 10 shown in Fig. 1 can be used to carry out implementation 300.Step 301 can comprise the first temperature of the liquid of the first At The Height of the rough tank of detection.Step 302 can comprise the second temperature of the liquid of the second At The Height of the rough tank of detection.Step 303 can comprise the recirculation flow circulation making highly to extract from the outflow of rough tank.Step 304 can comprise this recirculation flow of cooling.Step 305 can comprise working as when the first detected temperature is in outside predetermined temperature range makes at least Part I of recirculation flow turn back to the first return altitude.Process 300 can comprise working as when the second detected temperature is in outside predetermined temperature range makes at least Part II of recirculation flow turn back to the second return altitude.In one aspect, at least this first return altitude or this second return altitude higher than the outflow height of rough tank.
In one aspect, provide a kind of process, this process in order to prepare empty rough tank, this rough tank for receiving rough acrylonitrile product stream, such as rough acrylonitrile product stream 14.In one aspect, this process comprises adds water to rough tank, and the amount of the water added is suitable for the organic matter absorbed below the floating top cover of rough tank.Organic absorption can be used for the organic loss preventing rough tank.
In yet another aspect, start-up course can comprise fills empty rough tank to make the top cover of tank floating with the water calculating by weight about 6% or more, in yet another aspect about 6% to about 15%, in yet another aspect about 6% to about 10%, and in yet another aspect about 6% to about 8%.This process can comprise makes water circulation by refrigerator (such as refrigerator 54) to realize the target temperature of the liquid in tank, such as about 25 DEG C or lower, about 20 DEG C or lower in yet another aspect, about 18 DEG C or lower in yet another aspect, about 15 DEG C or lower in yet another aspect, about 10 DEG C or lower in yet another aspect, about 1 DEG C to about 10 DEG C in yet another aspect, and about 5 DEG C to about 10 DEG C in yet another aspect.This process can comprise to circulating water add acid with realize liquid in tank about 4 or lower pH value, and in yet another aspect about 3 to about 4 pH value.In this, after water has reached 25 DEG C or lower temperature, add acid to water.In yet another aspect, when rough tank be about 25 DEG C or lower and pH value is about 4 or lower time, add rough acrylonitrile to rough tank.
Rough acrylonitrile be in tank in, this process can comprise the pH value of periodically sample liquid, and such as approximately every six (6) hours are once, and if pH value is greater than about 4.5 add more acid.This process can comprise makes rough acrylonitrile product cycle through refrigerator (such as refrigerator 54) to maintain the temperature lower than about 18 degrees Celsius.
In one aspect, a kind of process can be provided to solve the demand non-refining or off-grade being placed on and keeping in tank.At this time, may need rough acrylonitrile tank place in operation, be used as the maintenance tank of non-refining or off-grade.In one aspect, monitor to avoid or reduce the chemical reaction in tank to tank temperature and pH value.
In one aspect, two independent tanks 12 can serial or parallel connection operation.
Although describe the disclosure about some preferred embodiment of the present disclosure in the specification sheets above and set forth many details in order to illustrate, those skilled in the art will be appreciated that the disclosure can have other embodiments and some details described herein can marked change and do not depart from groundwork of the present disclosure.Should be appreciated that feature of the present disclosure can have amendment, distortion, change or substitute, and do not depart from the scope of spirit and scope of the present disclosure or claim.Such as, the size of various parts, quantity, size and shape can change to be applicable to specific application.Therefore, the shown specific embodiment with describing of this paper is only for illustrative object.
Claims (6)
1. a rough acrylonitrile holding vessel, is characterized in that comprising:
One or more sensor, it is configured to the temperature of the different temperatures At The Height detected in described rough acrylonitrile holding vessel;
One or morely remove position, it is configured to remove rough acrylonitrile from described rough acrylonitrile holding vessel;
PH sensor, it is configured to the pH value of the rough acrylonitrile detected in described rough acrylonitrile holding vessel; With
Return line, what it was configured to make recirculation flow turns back to described rough acrylonitrile holding vessel at least partially.
2. rough acrylonitrile holding vessel as claimed in claim 1, characterized by further comprising refrigerator, and described refrigerator is configured to cool the one or more recirculation flows removing position and extract from described rough acrylonitrile holding vessel.
3. rough acrylonitrile holding vessel as claimed in claim 1, characterized by further comprising controller, described controller is configured to receive from described pH sensor the signal corresponding to the pH value detected by described pH sensor, and described controller is configured to regulate the flow of the acid flowing to described tank.
4. rough acrylonitrile holding vessel as claimed in claim 3, it is characterized in that, described controller is configured to receive from described temperature sensor the signal corresponding to the temperature detected by described temperature sensor, and described controller is configured to the flow rate regulating described recirculation flow.
5. rough acrylonitrile holding vessel as claimed in claim 1, characterized by further comprising import, and described import is used for adding acid to described recirculation flow.
6. rough acrylonitrile holding vessel as claimed in claim 1, is characterized in that, the described length of rough acrylonitrile holding vessel and the ratio of diameter are about 0.5 to about 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301627.6U CN204237037U (en) | 2014-06-09 | 2014-06-09 | Rough acrylonitrile holding vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301627.6U CN204237037U (en) | 2014-06-09 | 2014-06-09 | Rough acrylonitrile holding vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204237037U true CN204237037U (en) | 2015-04-01 |
Family
ID=52766558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420301627.6U Expired - Lifetime CN204237037U (en) | 2014-06-09 | 2014-06-09 | Rough acrylonitrile holding vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204237037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991653A (en) * | 2014-06-09 | 2014-08-20 | 英尼奥斯欧洲股份公司 | Rough acrylonitrile tank |
-
2014
- 2014-06-09 CN CN201420301627.6U patent/CN204237037U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991653A (en) * | 2014-06-09 | 2014-08-20 | 英尼奥斯欧洲股份公司 | Rough acrylonitrile tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8334399B2 (en) | Method for producing acetone cyanohydrin and the subsequent products thereof by specific cooling | |
| JP4928740B2 (en) | Urea synthesis method and apparatus | |
| AU2007331690B2 (en) | Production by distillation of acetone cyanhydrin and method for producing methacrylic ester and subsequent products | |
| CN101835876A (en) | Bubble column type hydrocarbon reactor and slurry level detection method | |
| KR101085376B1 (en) | Method for producing amines by the hydrogenation of nitrile compounds | |
| US8586779B2 (en) | Method for producing methacrylic alkyl esters by way of azeotropic distillation | |
| WO2015200022A1 (en) | Control of ammonia and/or air feed into an ammoxidation reactor | |
| AU2007327787B2 (en) | Process and apparatus for preparing alkyl esters of methacrylic acid | |
| CN104968428B (en) | With the reactor of condensation pipe and the in the reactor method of polymeric polyamide vertically | |
| TW201446730A (en) | Nylon salt solution preparation processes with trim diamine mixing | |
| CN204237037U (en) | Rough acrylonitrile holding vessel | |
| CN215781617U (en) | Chloroethylene high-boiling residue treatment and purification system | |
| US20100004417A1 (en) | Method for the adsorptive purification of alkyl methacrylates | |
| CN206526790U (en) | A kind of chlorosulfuric acid preparation facilities | |
| CN104262173B (en) | A kind of method of being synthesized diglycolamine by glycol ether low-pressure process | |
| CN203890273U (en) | Pilot test reaction device suitable for preparing higher methyl acrylate | |
| US8129559B2 (en) | Process for preparing cyanohydrins and their use in the preparation of alkyl esters of methacrylic acid | |
| CN103991653B (en) | Rough acrylonitrile tank | |
| CN109603727A (en) | It is a kind of synthesis parachlorophenol can temperature automatically controlled reaction kettle | |
| CN101628883B (en) | Urea mid pressure decomposing process adopting double heating-falling film countercurrent heat exchange | |
| CN105628180B (en) | A kind of detection method of agitated bed reactor inner caking | |
| PT1597286E (en) | Polyolefin production using high olefin concentration | |
| US20160231062A1 (en) | Heat recovery device | |
| CN103285613B (en) | A kind of total reflux reaction distilling apparatus and synthetic method thereof of synthesizing terpinol | |
| CN113648674A (en) | Chloroethylene high-boiling residue treatment and purification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150401 |