CN105883896A - Method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst - Google Patents
Method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst Download PDFInfo
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- CN105883896A CN105883896A CN201410538284.XA CN201410538284A CN105883896A CN 105883896 A CN105883896 A CN 105883896A CN 201410538284 A CN201410538284 A CN 201410538284A CN 105883896 A CN105883896 A CN 105883896A
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Abstract
A method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst comprises the following steps: allowing waste silver catalysts and carrier waste residues thereof to react with a nitric acid solution with a pure mass ratio of 1:0.47-1.03 in a corrosion-resistant reactor to generate a mixed solution of silver nitrate and aluminum nitrate, filtering to obtain a clarified filtrate of silver nitrate and aluminum nitrate and a small amount of impurity filter cakes; feeding the clarified filtrate of silver nitrate and aluminum nitrate into a reduced-pressure distiller for reduced pressure distillation, concentrating the filtrate to obtain a saturated solution, discharging the solution, performing cooling and crystallization separation to firstly precipitating silver nitrate and subsequently aluminum nitrate nonahydrate crystals, then washing and drying to obtain products of aluminum nitrate nonahydrate crystals and silver nitrate; heating the obtained aluminum nitrate nonahydrate crystals in an oven to 68-72 DEG C for drying, cooling and packaging to obtain an aluminum nitrate hexahydrate product. According to the invention, silver nitrate and aluminum nitrate hexahydrate are prepared by using waste silver catalysts and carrier waste residues thereof as raw materials, waste is changed into valuables, and considerable economic benefit is created for enterprises.
Description
Technical field
The present invention relates to the comprehensive regulation and the technical field of utilization of oil organic chemical industry's deep processing dead catalyst, particularly relate to one
Plant and utilize waste silver catalyst to produce silver nitrate and the method for six water aluminum nitrates.
Background technology
Ethylene method be ethene and air or oxygen in the presence of silver catalyst, direct gaseous oxidation generates oxirane,
Forming condensed fluid being absorbed by absorption tower use water, the ethene of non-oxidation reaction is recirculated back to flow to continue in reactor reaction,
Cyclic absorption is until being completely formed oxirane liquid, and absorbing liquid obtains oxirane finished product through desorption rectifying.
In this oxidation reaction, most important link plays catalytic reaction with catalyst silver exactly, and silver any of the inside that get along well
Material reacts, so the effect of catalyst silver is irreplaceable.For above-mentioned reasons, the cost using catalyst silver is very
High, fall as waste discharge again after catalytic action completes, the most uneconomical but also not environmentally.Therefore catalysis is researched and developed
Agent silver or other catalyst, it is very important for being allowed to turn waste into wealth, timely, requisite.
Ethylene its discharge capacity of method silver catalyst to discharge 0.0002 ton for producing product per ton, namely produces product per ton row
Putting 0.2 kilogram, the inside also has alumina carrier to mix, and is called for short alum clay.Wherein the content of catalyst silver is 15%, remaining
Be entirely alundum (Al2O3).
The present invention is exactly to utilize silver catalyst and carrier waste residue thereof to prepare silver nitrate and the method for six water aluminum nitrates, solves useless silver catalysis
The environmental issue of agent, produces silver nitrate and six water aluminum nitrates, creates economic benefit for enterprise.
Summary of the invention
The technical problem to be solved is, processes silver catalyst and carrier waste residue thereof, comprehensive utilization, prepares nitre
Acid silver and six water aluminum nitrates, it is provided that a kind of utilize waste silver catalyst to produce silver nitrate and the method for six water aluminum nitrates, the method is effective
Make use of waste silver catalyst to prepare the value product such as silver nitrate and aluminum nitrate, both created economic worth, eliminated again
Pollute.
The technical solution adopted for the present invention to solve the technical problems is: one utilizes waste silver catalyst to produce silver nitrate and six water nitre
The method of acid aluminium, comprises the steps:
1) waste silver catalyst and carrier waste residue (in terms of silver oxide) thereof are reacted with pure mass ratio 1: 0.47～1.03 with salpeter solution
In corrosion resistant reactor, starting agitator, carry out chemical reaction, reaction generates silver nitrate and the mixed solution of aluminum nitrate,
Filter the filtrate of the clarification obtaining silver nitrate and aluminum nitrate and a small amount of impurity filter cake, impurity filter cake is sent to burning or buries；
2) filtrate of the silver nitrate of above-mentioned acquisition and the clarification of aluminum nitrate is sent in decompression distiller carries out decompression distillation, be condensed into
Ejecting cooling, Crystallization Separation during saturated solution, according to silver nitrate and the difference of aluminum nitrate freezing point, first separate out is nitric acid
Silver, reaches nine of the aluminum nitrate crystallization water yields according to conversion evaporation afterwards and just separates out nine water aluminum nitrate crystal, if through converting the water yield
Deficiency can fill the amount to nine crystallizations water, more scrubbed, dry, it is thus achieved that nine water aluminum nitrate crystal and silver nitrate products；
3) nine water aluminum nitrate crystal of above-mentioned acquisition being sent into drying baker and be heated to 68～72 DEG C of drying, nine water aluminum nitrates lose three
The crystallization water becomes six water aluminum nitrates, and cooled packaging obtains six water aluminum nitrate products.
The main chemical reactions equation of the present invention is:
3Ag+4HNO3=3AgNO3+2H2O+NO
Al2O3+6HNO3+9H2O=2Al (NO3)3·6H2O
The invention has the beneficial effects as follows: one, the invention provides one and utilize waste silver catalyst to produce silver nitrate and six water nitric acid
The method of aluminium, the method effectively make use of the material of silver catalyst and carrier waste residue thereof to form, and gives up silver catalyst and carrier thereof
Slag processes, comprehensive utilization, prepares silver nitrate and six water aluminum nitrates.Its two, silver nitrate and six water aluminum nitrate purposes are wide,
It is the product that two kinds of economic worths are bigger, improves Processing Ag catalyst and the economic benefit of carrier waste residue thereof, create the biggest
Profit return, is the model of the chemical industry comprehensive regulation and utilization.Its three, small investment, Processing Ag catalyst and carrier thereof are given up
Slag prepares silver nitrate and six water aluminum nitrates are especially suitable, it may be said that open a Tiao Xin road.Its four, the purity of preparation is high, matter
Measure guaranteed.Its five, the method effectively avoids the secondary pollution of oil organic chemical industry deep processing enterprise, in primary emission
Find potentiality to eat that dry deep-frying is clean, turn waste into wealth, eventually become valuable silver nitrate and six water aluminum nitrate products, create considerable
Economic benefit.
Detailed description of the invention
Embodiment one, a kind of described in the present embodiment utilizes waste silver catalyst to produce silver nitrate and the method for six water aluminum nitrates, including
Following steps:
1) take catalyst silver content be 15%, alundum (Al2O3) content be 85% waste silver catalyst and 500 kilograms of carrier waste residue thereof
Prepare silver nitrate and six water aluminum nitrates, by waste silver catalyst and carrier waste residue (in terms of silver oxide) thereof with salpeter solution with pure mass ratio
React on corrosion resistant reactor at 1: 0.78, starts agitator, carries out chemical reaction, and reaction generates silver nitrate and aluminum nitrate
Mixed solution, filter the filtrate of the clarification obtaining silver nitrate and aluminum nitrate and a small amount of impurity filter cake, impurity filter cake sent to and burns
Burn or bury；
2) filtrate of the silver nitrate of above-mentioned acquisition and the clarification of aluminum nitrate is sent in decompression distiller carries out decompression distillation, be condensed into
Ejecting cooling, Crystallization Separation during saturated solution, according to silver nitrate and the difference of aluminum nitrate freezing point, first separate out is nitric acid
Silver, reaches nine of the aluminum nitrate crystallization water yields according to conversion evaporation afterwards and just separates out nine water aluminum nitrate crystal, if through converting the water yield
Deficiency can fill the amount to nine crystallizations water, more scrubbed, dry, it is thus achieved that nine water aluminum nitrate crystal and 118.4 kilograms of nitric acid
Silver products；
3) nine water aluminum nitrate crystal of above-mentioned acquisition being sent into drying baker and be heated to 68～72 DEG C of drying, nine water aluminum nitrates lose three
The crystallization water becomes six water aluminum nitrates, and cooled packaging obtains 563 kilogram of six water aluminum nitrate product.
Embodiment two, a kind of described in the present embodiment utilizes waste silver catalyst to produce silver nitrate and the method for six water aluminum nitrates, including
Following steps:
1) take catalyst silver content be 15%, alundum (Al2O3) content be 85% waste silver catalyst and 500 kilograms of carrier waste residue thereof
Prepare silver nitrate and six water aluminum nitrates, by waste silver catalyst and carrier waste residue (in terms of silver oxide) thereof with salpeter solution with pure mass ratio
React on corrosion resistant reactor at 1: 0.98, starts agitator, carries out chemical reaction, and reaction generates silver nitrate and aluminum nitrate
Mixed solution, filter the filtrate of the clarification obtaining silver nitrate and aluminum nitrate and a small amount of impurity filter cake, impurity filter cake sent to and burns
Burn or bury；
2) filtrate of the silver nitrate of above-mentioned acquisition and the clarification of aluminum nitrate is sent in decompression distiller carries out decompression distillation, be condensed into
Ejecting cooling, Crystallization Separation during saturated solution, according to silver nitrate and the difference of aluminum nitrate freezing point, first separate out is nitric acid
Silver, reaches nine of the aluminum nitrate crystallization water yields according to conversion evaporation afterwards and just separates out nine water aluminum nitrate crystal, if through converting the water yield
Deficiency can fill the amount to nine crystallizations water, more scrubbed, dry, it is thus achieved that nine water aluminum nitrate crystal and 148.8 kilograms of nitric acid
Silver products；
3) nine water aluminum nitrate crystal of above-mentioned acquisition being sent into drying baker and be heated to 68～72 DEG C of drying, nine water aluminum nitrates lose three
The crystallization water becomes six water aluminum nitrates, and cooled packaging obtains 707.4 kilogram of six water aluminum nitrate product.
Embodiment three, a kind of described in the present embodiment utilizes waste silver catalyst to produce silver nitrate and the method for six water aluminum nitrates, including
Following steps:
1) take catalyst silver content be 15%, alundum (Al2O3) content be 85% waste silver catalyst and 500 kilograms of carrier waste residue thereof
Prepare silver nitrate and six water aluminum nitrates, by waste silver catalyst and carrier waste residue (in terms of silver oxide) thereof with salpeter solution with pure mass ratio
React on corrosion resistant reactor at 1: 0.58, starts agitator, carries out chemical reaction, and reaction generates silver nitrate and aluminum nitrate
Mixed solution, filter the filtrate of the clarification obtaining silver nitrate and aluminum nitrate and a small amount of impurity filter cake, impurity filter cake sent to and burns
Burn or bury；
2) filtrate of the silver nitrate of above-mentioned acquisition and the clarification of aluminum nitrate is sent in decompression distiller carries out decompression distillation, be condensed into
Ejecting cooling, Crystallization Separation during saturated solution, according to silver nitrate and the difference of aluminum nitrate freezing point, first separate out is nitric acid
Silver, reaches nine of the aluminum nitrate crystallization water yields according to conversion evaporation afterwards and just separates out nine water aluminum nitrate crystal, if through converting the water yield
Deficiency can fill the amount to nine crystallizations water, more scrubbed, dry, it is thus achieved that nine water aluminum nitrate crystal and 88 kilograms of silver nitrates produce
Product；
3) nine water aluminum nitrate crystal of above-mentioned acquisition being sent into drying baker and be heated to 68～72 DEG C of drying, nine water aluminum nitrates lose three
The crystallization water becomes six water aluminum nitrates, and cooled packaging obtains 418.6 kilogram of six water aluminum nitrate product.
The above is only three preferred embodiments of the present invention, not for limiting the present invention, and its similar embodiments all, all
The protection domain of patent of the present invention should be covered by.
Claims (1)
1. utilize waste silver catalyst to produce silver nitrate and a method for six water aluminum nitrates, it is characterized in that comprising the steps:
1) by waste silver catalyst and carrier waste residue thereof and salpeter solution with pure mass ratio 1: 0.47～1.03 react on corrosion resistant instead
Answering in device, start agitator, carry out chemical reaction, reaction generates silver nitrate and the mixed solution of aluminum nitrate, filters and obtains nitric acid
The filtrate of the clarification of silver and aluminum nitrate and a small amount of impurity filter cake；
2) filtrate of the silver nitrate of above-mentioned acquisition and the clarification of aluminum nitrate is sent in decompression distiller carries out decompression distillation, be condensed into
Ejecting cooling, Crystallization Separation during saturated solution, according to silver nitrate and the difference of aluminum nitrate freezing point, first separate out is nitric acid
Silver, reaches nine of the aluminum nitrate crystallization water yields according to conversion evaporation afterwards and just separates out nine water aluminum nitrate crystal, if through converting the water yield
Deficiency can fill the amount to nine crystallizations water, more scrubbed, dry, it is thus achieved that nine water aluminum nitrate crystal and silver nitrate products；
3) nine water aluminum nitrate crystal of above-mentioned acquisition being sent into drying baker and be heated to 68～72 DEG C of drying, nine water aluminum nitrates lose three
The crystallization water becomes six water aluminum nitrates, and cooled packaging obtains six water aluminum nitrate products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410538284.XA CN105883896A (en) | 2014-09-24 | 2014-09-24 | Method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst |
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| CN201410538284.XA CN105883896A (en) | 2014-09-24 | 2014-09-24 | Method for preparing silver nitrate and aluminum nitrate hexahydrate by waste silver catalyst |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108585025A (en) * | 2018-07-11 | 2018-09-28 | 郴州市金贵银业股份有限公司 | A kind of recovery method of silver oxide slag |
-
2014
- 2014-09-24 CN CN201410538284.XA patent/CN105883896A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108585025A (en) * | 2018-07-11 | 2018-09-28 | 郴州市金贵银业股份有限公司 | A kind of recovery method of silver oxide slag |
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Application publication date: 20160824 |
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| WD01 | Invention patent application deemed withdrawn after publication |