CN1161935A - Method for production of silver potassium cyanide - Google Patents
Method for production of silver potassium cyanide Download PDFInfo
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- CN1161935A CN1161935A CN 96103774 CN96103774A CN1161935A CN 1161935 A CN1161935 A CN 1161935A CN 96103774 CN96103774 CN 96103774 CN 96103774 A CN96103774 A CN 96103774A CN 1161935 A CN1161935 A CN 1161935A
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- silver
- potassium cyanide
- cyanide
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Abstract
A new method for production of potassium argentocyanide is to use the basic material or base-releasing materiol to neutralize silver nitrate solution, then the neutrolizes silver nitrate solution is added to potassium cyanide solution to directly precipitate silver cyanide, and finally, silver cyanide reacts again with potassium cyanide to obtain potassium argentocyanide. As compared with the existing method, this invention does not pass through such procedures of evaporation, cooling, crystallization, drying, etc., greatly shortens the flow-path, and raises the economic benefit.
Description
The present invention relates to the production method of silver potassium cyanide.
Japanese publication " method that mineral compound prepares the production silver potassium cyanide of introducing in the handbook (the 3rd volume) is the production method that adopts usually at present, that is: with 1: 1 nitric acid dissolve argent, the silver nitrate solution that obtains is evaporated to remove excessive nitric acid, obtain the Silver Nitrate crystallization after the cooling, after filtration after the oven dry, press Silver Nitrate and 1: 1 mol ratio of potassium cyanide by calculating, be made into Silver Nitrate and potassium cyanide solution that concentration is 1mol/L respectively, under agitation Silver Nitrate is joined and be settled out silver cyanide in the potassium cyanide solution, then silver cyanide is made silver potassium cyanide with potassium cyanide by 1: 1 molar ratio reaction again.The whole process of this production method comprises dissolving, evaporation, cooling, crystallization, filtration, oven dry, dissolving again, steps such as precipitation, reaction, and it is long to exist operational path, complex operation, energy consumption height, the high deficiency of production cost.
The purpose of this invention is to provide a kind of novel method of simpler and more direct production silver potassium cyanide,, reduce cost so that shorten operational path greatly.
Technical scheme of the present invention is: silver is put into 1: 1 nitric acid be dissolved into silver nitrate solution, limit stirring silver nitrate solution limit progressively adds alkaline matter or releases alkaloid substance then, makes its certain pH value that neutralizes; Above-mentioned Silver Nitrate neutralizer is slowly joined in the potassium cyanide solution of equimolar amount, stir simultaneously, be settled out silver cyanide, again the silver cyanide that obtains and the potassium cyanide solution of equimolar amount are reacted under 50～95 ℃ of temperature, promptly make silver potassium cyanide solution.Wherein employed alkaline matter or release alkaloid substance preferably ammoniacal liquor or urea or bicarbonate of ammonia is between the pH value control 5-8 of Silver Nitrate neutralizer.
The present invention do not compare with existing production method need evaporate, cooling, crystallization, filtration, oven dry, process such as dissolving again, shortened technical process greatly, reduced energy consumption, reduced production cost, obviously improved productivity effect.
Below be embodiments of the invention:
Get purity and be 99.95% argent 54g (0.5mol) and place reaction vessel, add 10% sodium hydroxide solution, be heated to 80-90 ℃, remove degreasing, wash down with deionized water then.With 80ml1: 1 analytical pure nitric acid joins in the reaction vessel that is placed with silver, (heating for dissolving in case of necessity), treat that silver dissolves fully after, being diluted to volume with deionized water is 500ml; Under violent stirring, splash into the ammoniacal liquor of 2mol/L or urea or bicarbonate of ammonia then gradually and neutralize, monitor pH value with acidometer simultaneously, when pH value reaches between the 5-8, stop to add ammoniacal liquor (or urea or carbonic acid cyanogen ammonium).In another container, 33g (0.5mol) potassium cyanide is dissolved as 500ml solution; Under agitation above-mentioned Silver Nitrate neutralizer is slowly poured in the potassium cyanide solution with the thread shape, generated white fine-grannular precipitation, through suction filtration, deionized water wash is dried under 80-90 ℃ of temperature, obtains silver cyanide 66.5g (productive rate 99.4%).Silver cyanide is joined in the 500ml solution that contains 0.5mol potassium cyanide at last again, under 50～95 ℃ of temperature, react, just make silver potassium cyanide.
Claims (3)
1, a kind of production silver potassium cyanide novel method is characterized in that:
(1) nitric acid of silver being put into 1: 1 dissolves and becomes silver nitrate solution;
(2) silver nitrate solution is stirred on the limit, and the limit adds alkaline matter gradually or releases alkaloid substance, makes its certain pH value that neutralizes;
(3) above-mentioned Silver Nitrate neutralizer is slowly joined in the potassium cyanide solution of equimolar amount, stir simultaneously, be settled out silver cyanide;
(4) again the potassium cyanide solution of above-mentioned silver cyanide that obtains and equimolar amount is reacted under 50～95 ℃ of temperature, promptly make silver potassium cyanide.
2,, it is characterized in that described alkaline matter or release alkaloid substance preferably ammoniacal liquor or urea or bicarbonate of ammonia according to the novel method of the described production silver potassium cyanide of claim 1.
3, according to the novel method of the described production silver potassium cyanide of claim 1, its feature is controlled between the 5-8 at the pH value of the described neutralizer of fourth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96103774 CN1161935A (en) | 1996-04-11 | 1996-04-11 | Method for production of silver potassium cyanide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96103774 CN1161935A (en) | 1996-04-11 | 1996-04-11 | Method for production of silver potassium cyanide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1161935A true CN1161935A (en) | 1997-10-15 |
Family
ID=5118196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96103774 Pending CN1161935A (en) | 1996-04-11 | 1996-04-11 | Method for production of silver potassium cyanide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1161935A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874844A (en) * | 2012-10-25 | 2013-01-16 | 河南银城科技股份有限公司 | Method for producing silver potassium cyanide |
| CN104250012A (en) * | 2014-09-27 | 2014-12-31 | 深圳市鑫鸿发环保设备有限公司 | Silver cyanide manufacturing technology and equipment thereof |
| CN113247919A (en) * | 2021-05-21 | 2021-08-13 | 漯河瀚普环创环保科技有限公司 | Preparation method of silver potassium cyanide |
-
1996
- 1996-04-11 CN CN 96103774 patent/CN1161935A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874844A (en) * | 2012-10-25 | 2013-01-16 | 河南银城科技股份有限公司 | Method for producing silver potassium cyanide |
| CN104250012A (en) * | 2014-09-27 | 2014-12-31 | 深圳市鑫鸿发环保设备有限公司 | Silver cyanide manufacturing technology and equipment thereof |
| CN113247919A (en) * | 2021-05-21 | 2021-08-13 | 漯河瀚普环创环保科技有限公司 | Preparation method of silver potassium cyanide |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |