CN205443471U - Keep activated device of acrylonitrile electrolytic preparation adiponitrile in -process electrolyte - Google Patents
Keep activated device of acrylonitrile electrolytic preparation adiponitrile in -process electrolyte Download PDFInfo
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- CN205443471U CN205443471U CN201521133286.7U CN201521133286U CN205443471U CN 205443471 U CN205443471 U CN 205443471U CN 201521133286 U CN201521133286 U CN 201521133286U CN 205443471 U CN205443471 U CN 205443471U
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- acrylonitrile
- adiponitrile
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Abstract
The utility model discloses a keep activated device of acrylonitrile electrolytic preparation adiponitrile in -process electrolyte, including deironing electrolysis trough and cell liquor pump, the feed inlet of deironing electrolysis trough passes through cell liquor pump and vapour and liquid separator lower part or bottom intercommunication, discharge gate and the vapour and liquid separator middle part or the upper portion intercommunication of deironing electrolysis trough. The utility model discloses a setting up the deironing electrolysis trough, shunting partial electrolyte to the deironing electrolysis trough in, then get rid of through the metal ion of electrolytic mode in with electrolyte, the re -entering has reached the purpose that reduces the metal ion concentration in the electrolyte in getting back to main circulating, has reduced metal ion and has appeared on the negative pole, has improved adiponitrile product yield and current efficiency to the acrylonitrile electrolysis trough continuous use time has been prolonged.
Description
Technical field
This utility model relates to the preparing technical field of adiponitrile, is specifically related to a kind of keep acrylonitrile electrolysis to prepare the device of electrolyte activity during adiponitrile.
Background technology
Adiponitrile has another name called Isosorbide-5-Nitrae-dicyanobutane, is a kind of important industrial chemicals, is mainly used in producing the intermediate hexamethylene diamine of polyamide nylon 66 salt, it may also be used for produce rubber chemicals, insecticide and antibacterial, rocket fuel, macromolecular material；It also is used as the extractant etc. of plasticizer, additive, coloring agent, textile auxiliary, solvent and Aromatics Extractive Project；Additionally, also there is certain purposes in analytical chemistry and electroplating industry.
Nineteen sixty-five, first Monsanto company achieves the industrialization of diaphragm electrolysis acrylonitrile (AN) Adiponitrile (ADN).Being barrier film with the cation exchange membrane of sulfonated polystyrene ion exchange resin type, lead-silver alloy does anode and cadmium does negative electrode.Within 1976, the said firm develops again without barrier film new technology.Anode is carbon steel, and negative electrode is cadmium, is electrolysed the mode Adiponitrile of acrylonitrile emulsion in without diaphragm electrolytic cell.
Patent CN201010573023 proposes one AN aqueous solution and replaces emulsion or micro emulsion, is electrolysed AN to synthesize the new method of ADN in without diaphragm electrolytic cell.On the premise of keeping high ADN productivity and current efficiency, can receive and simplify production technology and save the effect of material.Its anode material used is Fe, Pb or PbO2；Cathode material is C, Pb or Cd.
The electrode material of existing acrylonitrile electrolysis technique is generally containing one or more in Fe, Ni, Pb, Cd.Although adding various corrosion inhibiter, but in use, the metal ion contained by electrode inevitably enters in electrolyte.When concentration of metal ions reaches to a certain degree, can separate out on negative electrode, change the electrolyte properties of acrylonitrile electrolysis groove, reduce adiponitrile product yield and current efficiency, the most also can reduce the continuous use time of acrylonitrile electrolysis groove.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of and keeps acrylonitrile electrolysis to prepare the device of electrolyte activity during adiponitrile, can the metal ion in electrolyte be controlled at certain level, reduce metal ion to separate out on negative electrode, improve adiponitrile product yield and current efficiency, and acrylonitrile electrolysis groove can be extended use the time continuously.
For reaching above-mentioned purpose, this utility model following technical scheme of offer:
A kind of acrylonitrile electrolysis is kept to prepare the device of electrolyte activity during adiponitrile, including except electrolytic iron groove and electrolysis liquid pump, the described charging aperture except electrolytic iron groove is connected with gas-liquid separator bottom or bottom by electrolysis liquid pump, described connects with in the middle part of gas-liquid separator or top except the discharging opening of electrolytic iron groove.
Further, the described anode except electrolytic iron groove is platinum, gold, titanium, nickel, lead or the insoluble anode with it as matrix, and negative electrode material is titanium, lead, cadmium, copper or carbon steel.
Further, described except electrolytic iron groove be monopolar type or bipolar electrolyzer.
The beneficial effects of the utility model are:
This utility model is by arranging except electrolytic iron groove, partial electrolyte liquid is branched to except in electrolytic iron groove, then by the way of electrolysis, the metal ion in electrolyte is removed, again return in major cycle, reach to reduce the purpose of the concentration of metal ions in electrolyte, decrease metal ion to separate out on negative electrode, improve adiponitrile product yield and current efficiency, and extend acrylonitrile electrolysis groove and use the time continuously.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearer, this utility model provides drawings described below to illustrate:
Fig. 1 is that holding acrylonitrile electrolysis of the present utility model prepares the structural representation of the device of electrolyte activity during adiponitrile.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
Embodiment 1
As shown in Figure 1, keep acrylonitrile electrolysis to prepare the device of electrolyte activity during adiponitrile and include except electrolytic iron groove 1 and electrolysis liquid pump 4, the described charging aperture except electrolytic iron groove 1 is connected with gas-liquid separator 2 bottom by electrolysis liquid pump 4, described connects in the middle part of gas-liquid separator 2 except the discharging opening of electrolytic iron groove 1；Described except electrolytic iron groove 1 be monopolar electrolyzer；The described anode except electrolytic iron groove 1 is titanio insoluble anode, and negative electrode material is titanium.
Keep acrylonitrile electrolysis to prepare the method for electrolyte activity during adiponitrile to comprise the following steps:
(1), during electrolyte flows into gas-liquid separator 2 after gas-liquid separation, partial electrolyte liquid is branched to except electrolytic iron groove 1；
(2) branching to the electrolyte except electrolytic iron groove 1 and be electrolysed removal metal ion in except electrolytic iron groove 1, cathode-current density is 800A/m2, the temperature of electrolyte is 40 DEG C, and electrolyte linear velocity between pole plate is 0.5m/s；
(3) electrolyte eliminating metal ion returns to be continuing with in major cycle；Fe in electrolyte2+Decline 45mg/L, Pb2+Decline 20mg/L.
In electrolyte, acrylonitrile it is continuously added into during electrolysis, in electrolyte inflow gas-liquid separator 2 after gas-liquid separation, partial electrolyte liquid is looped back acrylonitrile electrolysis groove 3 cyclic electrolysis by main circulation pump 5, partial electrolyte liquid is diverted in oil-water decanter 6 be continuously separated out oil phase, aqueous phase returns acrylonitrile electrolysis groove 3, oil phase washing also obtains product adiponitrile, by-product propionitrile and unreacted acrylonitrile, acrylonitrile reuse with 8 rectification after rectifying column 7 separates.Adiponitrile yield improves 4%, and total current efficiency improves 6%.
Embodiment 2
As shown in Figure 1, keep acrylonitrile electrolysis to prepare the device of electrolyte activity during adiponitrile and include except electrolytic iron groove 1 and electrolysis liquid pump 4, the described charging aperture except electrolytic iron groove 1 is connected with gas-liquid separator 2 bottom by electrolysis liquid pump 4, described connects in the middle part of gas-liquid separator 2 except the discharging opening of electrolytic iron groove 1；Described except electrolytic iron groove 1 be monopolar electrolyzer；The described anode except electrolytic iron groove 1 is titanio insoluble anode, and negative electrode material is carbon steel.
Keep acrylonitrile electrolysis to prepare the method for electrolyte activity during adiponitrile to comprise the following steps:
(1), during electrolyte flows into gas-liquid separator 2 after gas-liquid separation, partial electrolyte liquid is branched to except electrolytic iron groove 1；
(2) branching to the electrolyte except electrolytic iron groove 1 and be electrolysed removal metal ion in except electrolytic iron groove 1, cathode-current density is 1000A/m2, the temperature of electrolyte is 50 DEG C, and electrolyte linear velocity between pole plate is 1m/s；
(3) electrolyte eliminating metal ion returns to be continuing with in major cycle；Fe in electrolyte2+Decline 32mg/L, Cd2+Decline 28mg/L.
In electrolyte, acrylonitrile it is continuously added into during electrolysis, in electrolyte inflow gas-liquid separator 2 after gas-liquid separation, partial electrolyte liquid is looped back acrylonitrile electrolysis groove 3 cyclic electrolysis by main circulation pump 5, partial electrolyte liquid is diverted in oil-water decanter 6 be continuously separated out oil phase, aqueous phase returns acrylonitrile electrolysis groove 3, oil phase washing also obtains product adiponitrile, by-product propionitrile and unreacted acrylonitrile, acrylonitrile reuse with 8 rectification after rectifying column 7 separates.Adiponitrile yield improves 3%, and total current efficiency improves 5%.
Embodiment 3
As shown in Figure 1, keep acrylonitrile electrolysis to prepare the device of electrolyte activity during adiponitrile and include except electrolytic iron groove 1 and electrolysis liquid pump 4, the described charging aperture except electrolytic iron groove 1 is connected with gas-liquid separator 2 bottom by electrolysis liquid pump 4, described connects in the middle part of gas-liquid separator 2 except the discharging opening of electrolytic iron groove 1；Described except electrolytic iron groove 1 be bipolar electrolyzer；The described anode except electrolytic iron groove 1 is platino insoluble anode, and negative electrode material is titanium.
Keep acrylonitrile electrolysis to prepare the method for electrolyte activity during adiponitrile to comprise the following steps:
(1), during electrolyte flows into gas-liquid separator 2 after gas-liquid separation, partial electrolyte liquid is branched to except electrolytic iron groove 1；
(2) branching to the electrolyte except electrolytic iron groove 1 and be electrolysed removal metal ion in except electrolytic iron groove 1, cathode-current density is 1300A/m2, the temperature of electrolyte is 55 DEG C, and electrolyte linear velocity between pole plate is 1.3m/s；
(3) electrolyte eliminating metal ion returns to be continuing with in major cycle；Fe in electrolyte2+Decline 42mg/L, Pb2+Decline 31mg/L.
In electrolyte, acrylonitrile it is continuously added into during electrolysis, in electrolyte inflow gas-liquid separator 2 after gas-liquid separation, partial electrolyte liquid is looped back acrylonitrile electrolysis groove 3 cyclic electrolysis by main circulation pump 5, partial electrolyte liquid is diverted in oil-water decanter 6 be continuously separated out oil phase, aqueous phase returns acrylonitrile electrolysis groove 3, oil phase washing also obtains product adiponitrile, by-product propionitrile and unreacted acrylonitrile, acrylonitrile reuse with 8 rectification after rectifying column 7 separates.Adiponitrile yield improves 5%, and total current efficiency improves 8%.
Finally illustrate is, preferred embodiment above is only in order to illustrate the technical solution of the utility model and unrestricted, although this utility model being described in detail by above preferred embodiment, but skilled artisan would appreciate that, in the form and details it can be made various change, without departing from this utility model claims limited range.
Claims (3)
1. one kind keeps acrylonitrile electrolysis to prepare the device of electrolyte activity during adiponitrile, it is characterized in that: include except electrolytic iron groove and electrolysis liquid pump, the described charging aperture except electrolytic iron groove is connected with gas-liquid separator bottom or bottom by electrolysis liquid pump, described connects with in the middle part of gas-liquid separator or top except the discharging opening of electrolytic iron groove.
Holding acrylonitrile electrolysis the most according to claim 1 prepares the device of electrolyte activity during adiponitrile, it is characterized in that: the described anode except electrolytic iron groove is platinum, gold, titanium, nickel, lead or the insoluble anode with it as matrix, negative electrode material is titanium, lead, cadmium, copper or carbon steel.
Holding acrylonitrile electrolysis the most according to claim 1 prepares the device of electrolyte activity during adiponitrile, it is characterised in that: described except electrolytic iron groove be monopolar type or bipolar electrolyzer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521133286.7U CN205443471U (en) | 2015-12-29 | 2015-12-29 | Keep activated device of acrylonitrile electrolytic preparation adiponitrile in -process electrolyte |
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| CN201521133286.7U CN205443471U (en) | 2015-12-29 | 2015-12-29 | Keep activated device of acrylonitrile electrolytic preparation adiponitrile in -process electrolyte |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105420753A (en) * | 2015-12-29 | 2016-03-23 | 重庆紫光国际化工有限责任公司 | Method and device for maintaining activity of electrolyte during process of acrylonitrile electrolysis for preparing adiponitrile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105420753A (en) * | 2015-12-29 | 2016-03-23 | 重庆紫光国际化工有限责任公司 | Method and device for maintaining activity of electrolyte during process of acrylonitrile electrolysis for preparing adiponitrile |
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Effective date of registration: 20200417 Address after: 402160 No. 426, Chemical Road, Yongchuan District, Chongqing Patentee after: Chongqing Unisplendour Chemical Co.,Ltd. Address before: 400000 Changshou District (longevity), chemical industry zone, North Road, North District, Chongqing Patentee before: CHONGQING UNISPLENDOUR INTERNATIONAL CHEMICAL Co.,Ltd. |