CN204039512U - A kind of electrolyzer preparing silver-colored potassium cyanide - Google Patents
A kind of electrolyzer preparing silver-colored potassium cyanide Download PDFInfo
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- CN204039512U CN204039512U CN201420422151.1U CN201420422151U CN204039512U CN 204039512 U CN204039512 U CN 204039512U CN 201420422151 U CN201420422151 U CN 201420422151U CN 204039512 U CN204039512 U CN 204039512U
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- half groove
- dashpot
- anode
- membrane
- electrolyzer
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Abstract
The utility model relates to a kind of electrolyzer preparing silver-colored potassium cyanide, comprise anode half groove, negative electrode half groove and dashpot, by the two ends, left and right of Flange joint dashpot and two connectivity ports place is equipped with anode membrane between described anode half groove and negative electrode half groove, the both sides sealing of described anode membrane is provided with silicagel pad; Described anode membrane is homogeneous phase cation exchange film.The beneficial effects of the utility model are: compared with conventional membrane electrolyzer, add a dashpot and an anode membrane, adopt two anode membrane to arrange, can effectively solve the silver ions a small amount of when electrolytic preparation silver potassium cyanide by anode membrane after in the problem of cathodic deposition.
Description
Technical field
The utility model relates to a kind of electrolyzer, particularly a kind of electrolyzer preparing silver-colored potassium cyanide.
Background technology
Silver potassium cyanide (K [Ag (CN)
2]) as important plated material, purposes is very extensive.Membrane electrolysis produce silver-colored potassium cyanide due to technique simple, human contact is few with deadly poisonous compound, instead of chemical synthesis gradually.Chinese patent discloses the silver-colored potassium cyanide preparation technology (Authorization Notice No.: CN102899678 A) based on membrane electrolysis, it is characterized in that: (1) potassium hydroxide electrolyte and potassium cyanide electrolytic solution is put into respectively cathodic area in electrolyzer and electrolytic reaction is carried out in positive column; (2) discharge electrolytic solution from side, positive column, carry out concentrating, crystallization obtains silver-colored potassium cyanide product, antianode district electrolytic solution carries out circular treatment simultaneously; (3) discharge electrolytic solution from side, cathodic area, anticathode district electrolytic solution carries out circular treatment or generates neutralizing agent.The diaphragm sell used in this technique is mainly by cationic exchange membrane, and positive column, cathodic area are formed.Positive column and cathodic area separate by cationic exchange membrane; Use silver plate as anode in positive column, potassium cyanide (KCN) is as electrolytic solution; The electrode materials being insoluble to potassium hydroxide aqueous solution with stainless steel or copper, nickel, titanium, graphite etc. in cathodic area makes negative electrode, using potassium hydroxide (KOH) as electrolytic solution.Pass into direct current in a cell, positive plate silver dissolves and produces silver ions (Ag
+) and cyanide ion (CN
-) combine the silver-colored cyanogen complexing ion of generation ([Ag (CN)
2]
-), under electric field action, CN
-[Ag (CN)
2]
-not by cationic exchange membrane under electric field action, only has positively charged ion potassium ion (K
+) by entering cathodic area; Hydroxide ion (the OH in cathodic area
-) because the selectivity of cationic exchange membrane stops and can not enter positive column, such positive column produces K [Ag (CN)
2], cathodic area produces KOH.
But this process electrolyte groove is at actual production K [Ag (CN)
2] in process, when getting rid of cationic exchange film rupture, find that there is the phenomenon of a small amount of deposition of silver at cathodic discharge, its reason is [Ag (CN)
2]
-there is following dissociation equilibrium in the solution:
[Ag(CN)
2]
—Ag
+?+?2?CN
—
Dissociation equilibrium constant K=[Ag
+] × [CN
-]
2/ [Ag (CN)
2 -], along with the carrying out [Ag (CN) of electrolytic reaction
2 -] increase, [CN
-] reduce, then the Ag in solution
+concentration constantly increases, although Ag on the whole
+concentration is very low, but still has a small amount of Ag
+under electric field action, by cationic exchange membrane to cathodic migration, finally discharge, in deposition cathode, cause wastage of material.
Utility model content
The purpose of this utility model is to provide a kind of electrolyzer preparing silver-colored potassium cyanide, to overcome prior art above shortcomings.
The purpose of this utility model is achieved through the following technical solutions:
A kind of electrolyzer preparing silver-colored potassium cyanide, comprise anode half groove, negative electrode half groove and dashpot, by the two ends, left and right of Flange joint dashpot and two connectivity ports place is equipped with anode membrane between described anode half groove and negative electrode half groove, the both sides of described anode membrane are equipped with the silicagel pad suitable with flange.
Further, described anode membrane is homogeneous phase cation exchange film.
Further, a sidewall top of described anode half groove, negative electrode half groove and dashpot is provided with water-in respectively, and another sidewall lower part of described anode half groove, negative electrode half groove and dashpot is not provided with water outlet.
The beneficial effects of the utility model are: compared with conventional membrane electrolyzer, add a dashpot and an anode membrane, adopt two anode membrane to arrange, can effectively solve the silver ions a small amount of when electrolytic preparation silver potassium cyanide by anode membrane after in the problem of cathodic deposition.
Accompanying drawing explanation
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the structural representation of electrolyzer of the preparation silver potassium cyanide described in the utility model embodiment;
Fig. 2 is the structural representation of the silicagel pad described in the utility model embodiment;
Fig. 3 is the schematic diagram of the preparation silver potassium cyanide described in the utility model embodiment.
In figure:
1, anode half groove; 2, negative electrode half groove; 4, dashpot; 5, anode membrane; 6, flange; 7, silicagel pad; 8, anode; 9, negative electrode; 10, water-in; 11, water outlet.
Embodiment
As shown in Figure 1-2, a kind of electrolyzer preparing silver-colored potassium cyanide described in the utility model embodiment, comprise anode half groove 1, negative electrode half groove 2 and dashpot 4, connect the two ends, left and right of dashpot 4 by flange 6 between described anode half groove 1 and negative electrode half groove 2 and two connectivity ports place is equipped with anode membrane 5, the both sides of described anode membrane 5 are equipped with the silicagel pad 7 suitable with flange 6; Described anode membrane 5 is homogeneous phase cation exchange film.The connectivity port, side of described anode half groove 1 and negative electrode half groove 2 and the connectivity port of dashpot 4 both sides are equipped with flange 6.One sidewall top of described anode half groove 1, negative electrode half groove 2 and dashpot 4 is provided with water-in 10 respectively, and another sidewall lower part of described anode half groove 1, negative electrode half groove 2 and dashpot 4 is not provided with water outlet 11.
As shown in Figure 1, described anode half groove 1 adopts silver plate as anode 8, and described negative electrode half groove 2 adopts graphite electrode material as negative electrode 9, and stainless steel electrode material or other electrode materials being insoluble to potassium hydroxide solution can also be adopted as negative electrode 9.
The electrolysis principle of the electrolyzer of the silver-colored potassium cyanide of described preparation as shown in Figure 3, adds KCN solution as electrolytic solution, adds KOH solution as electrolytic solution in negative electrode half groove 2 in anode half groove 1 and dashpot 4.After passing into direct current, anode 8 silver plate dissolves, and generates K [Ag (CN) in anode half groove
2], a part of K+ in anode half groove 1 is entered in dashpot 4 by anode membrane 5.Due to [Ag (CN)
2]
-dissociation equilibrium, at [Ag (CN)
2]
-when concentration is higher, there is the Ag of trace
+enter dashpot 4 by anode membrane 5, generate K [Ag (CN)
2], prevent Ag
+deposition on negative electrode.After electrolysis completes, the electrolytic solution releasing in anode half groove 1 is done condensing crystal process and is prepared K [Ag (CN)
2] crystal, the electrolytic solution in dashpot 4 passes into the electrolytic solution as electrolysis next time in anode half groove 1 again after releasing, dashpot 4 supplements fresh KCN solution again as electrolytic solution.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection domain of the present utility model.
Claims (3)
1. prepare the electrolyzer of silver-colored potassium cyanide for one kind, comprise anode half groove (1), negative electrode half groove (2) and dashpot (4), it is characterized in that: described anode half groove (1) and negative electrode half groove (2) are connected the two ends, left and right of dashpot (4) respectively by flange (6), and junction, two ends, described left and right is equipped with anode membrane (5), the both sides of described anode membrane (5) are equipped with the silicagel pad (7) suitable with flange (6).
2. the electrolyzer of the silver-colored potassium cyanide of preparation according to claim 1, is characterized in that: described anode membrane (5) is homogeneous phase cation exchange film.
3. the electrolyzer of the silver-colored potassium cyanide of preparation according to claim 2, it is characterized in that: a sidewall top of described anode half groove (1), negative electrode half groove (2) and dashpot (4) is provided with water-in (10) respectively, another sidewall lower part of described anode half groove (1), negative electrode half groove (2) and dashpot (4) is not provided with water outlet (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420422151.1U CN204039512U (en) | 2014-07-29 | 2014-07-29 | A kind of electrolyzer preparing silver-colored potassium cyanide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420422151.1U CN204039512U (en) | 2014-07-29 | 2014-07-29 | A kind of electrolyzer preparing silver-colored potassium cyanide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204039512U true CN204039512U (en) | 2014-12-24 |
Family
ID=52240200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420422151.1U Active CN204039512U (en) | 2014-07-29 | 2014-07-29 | A kind of electrolyzer preparing silver-colored potassium cyanide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204039512U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789982A (en) * | 2015-04-09 | 2015-07-22 | 上海应用技术学院 | Method for preparing silver molybdate with cationic membrane electrolysis method |
| CN109267081A (en) * | 2018-11-22 | 2019-01-25 | 衡阳市晋宏精细化工有限公司 | A kind of efficiently controllable gold potassium cyanide making apparatus |
| CN114423887A (en) * | 2019-07-15 | 2022-04-29 | 威廉马歇莱思大学 | Method for high-efficiency electrocatalytic synthesis of pure liquid product solution containing H2O2, oxygenates, ammonia and the like |
-
2014
- 2014-07-29 CN CN201420422151.1U patent/CN204039512U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789982A (en) * | 2015-04-09 | 2015-07-22 | 上海应用技术学院 | Method for preparing silver molybdate with cationic membrane electrolysis method |
| CN109267081A (en) * | 2018-11-22 | 2019-01-25 | 衡阳市晋宏精细化工有限公司 | A kind of efficiently controllable gold potassium cyanide making apparatus |
| CN114423887A (en) * | 2019-07-15 | 2022-04-29 | 威廉马歇莱思大学 | Method for high-efficiency electrocatalytic synthesis of pure liquid product solution containing H2O2, oxygenates, ammonia and the like |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |