CN108264082A - A kind of efficient preparation process of stannous chloride - Google Patents
A kind of efficient preparation process of stannous chloride Download PDFInfo
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- CN108264082A CN108264082A CN201810168487.2A CN201810168487A CN108264082A CN 108264082 A CN108264082 A CN 108264082A CN 201810168487 A CN201810168487 A CN 201810168487A CN 108264082 A CN108264082 A CN 108264082A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
- C01G3/04—Halides
- C01G3/05—Chlorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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Abstract
The present invention relates to a kind of efficient preparation processes of stannous chloride, are as follows：It will pass through in pretreated useless copper oxide erosion plate and add in copper oxide, the pH value for adjusting solution filters after being 1.5 2；Dilute hydrochloric acid solution, copper oxychloride solution are added in into filtered fluid, and it is 62: 38 to control the mass ratio of copper ion and chlorion in solution；After solution is heated to 50 57 DEG C, reducing agent is added in, when solution becomes light brown from green, stops adding in reducing agent；Water is added in, is filtered after being precipitated after stirring rinsing；Filtrate is followed by stirring and washing with dilute hydrochloric acid, is filtered, is filtered being added in filtered solid mixt after ethyl alcohol is washed；It will be dried in filtrate to drying device, you can obtain stannous chloride；The invention discloses a kind of efficient preparation processes of stannous chloride, effectively increase reaction speed, reduce steam consumption, improve yield, and raw material is easy to get, and low energy consumption, and technological process is short, and process conditions are simple, and operation is easy.
Description
Technical field
The present invention relates to a kind of efficient preparation processes of stannous chloride, belong to the preparation method of stannous chloride.
Background technology
The basic principle of existing stannous chloride preparation method is, by dichloride copper CuCl2.2H2O or copper oxide CuO compared with
In the sodium chloride or hydrochloric acid solution of high concentration, with reducing agent (Cu powder, SO2 etc.), stannous chloride is reduced into, wherein stannous chloride is molten
In concentrated hydrochloric acid and concentrated sodium chloride solution；The concentration with a large amount of water dilution sodium chloride and hydrochloric acid is needed, stannous chloride hydrolysis is allowed to analyse
After going out, then centrifuge washing, drying, drying (60 DEG C -80 DEG C).In existing technology when preparing stannous chloride, it is primarily present
Following defect is primarily present following defect：(1) CuCl could be precipitated by being hydrolyzed with the dilution of a large amount of water, in production not only
It needs to consume a large amount of water, and the displacement of waste water is also bigger, to the pollution of environment also than more serious.(2) raw material into
During row reaction, need a large amount of sodium chloride and add in, environment can be produced containing a large amount of NaCl or Na2SO4 in waste water after reaction
Raw certain pollution.
Invention content
The present invention provides a kind of efficient preparation process of stannous chloride, to solve for the deficiencies in the prior art
Problems of the prior art.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of efficient preparation process of stannous chloride, is as follows：
(1) it will pass through in pretreated useless copper oxide erosion plate and add in copper oxide, the pH value for adjusting solution is 1.5-2；
(2) mixed liquor is filtered, and removes the insoluble matter in mixed liquor；
(3) dilute hydrochloric acid solution, copper oxychloride solution are added in into the filtered fluid after filtering, and control in solution copper ion with
The mass ratio of chlorion is 62: 38；
(4) after the solution after step (3) is reacted is heated to 50-57 DEG C, reducing agent is added in, when solution becomes light from green
During brown, stop adding in reducing agent；
(5) add in water into the mixture after step (4) reaction, precipitated after stirring rinsing, by mixture be passed through to
It is filtered in filter device, takes filtrate；
(6) filtrate is followed by stirring and washing with dilute hydrochloric acid, the mixture after washing is carried out by vacuum suction filter
It filters；
(7) ethyl alcohol will be added in filtered solid mixt to wash, the mixture after washing is put into filtering
It is filtered in device；
(8) filtrate after filtering is put into and is dried into drying device, you can obtain stannous chloride.
As a modification of the present invention, dilute hydrochloric acid is the dilute hydrochloric acid of concentration 3% in the step (6).
As a modification of the present invention, the agitator treating time is 30-45 minutes in the step (6).
As a modification of the present invention, the number that ethyl alcohol washs in the step (7) is 3-6 times.
As a modification of the present invention, the dry time is 60-80 DEG C in the step (8), the time of the drying
It is 1.5-2.5 hours.
As a modification of the present invention, reducing agent is the mixture of sulfur dioxide, sodium sulfite in the step (4).
The pre-treatment step of the copper oxide that gives up as a modification of the present invention, in the step (1) erosion plate is as follows：It 1) will be useless
Copper oxide erosion plate crushes, and the material after crushing, which is fed through in cleaning device, to be cleaned；
2) pure water will be added in, and solution is heated to 80-90 DEG C in the useless copper oxide erosion plate after cleaning；
3) by sodium phosphate, dibastic sodium phosphate, sodium bicarbonate, water using mass ratio as 3:3:1:After 8 are mixed, add in by step
Useless copper oxide erosion plate after rapid 2) immersion, and impregnate 30-40 minutes；A concentration of 0.2-0.4% of the sodium phosphate, it is described
A concentration of 0.1-0.2% of dibastic sodium phosphate, a concentration of 0.7-1.5% of the sodium bicarbonate；
4) the useless copper oxide erosion plate after immersion is put into and is cleaned multiple times into water, and clean to the pH value of water lotion and be
5-6；
5) cleaning particle is put into mixed solution, adds in water and be stirred, and mixture is subjected to energization 1-2 hours
Afterwards, the useless copper oxide added in into the mixture after energization after step (4) cleaning loses plate, and mixture is impregnated
After 20-50 minutes, useless copper oxide erosion plate is taken out, you can complete the pretreatment to the copper oxide erosion plate that gives up.
As a modification of the present invention, the water and the mass ratio of cleaning particle that are added in the step 5) are 3:7.
As a modification of the present invention, the production technology of cleaning particle is as follows in the step 5)：A) by activated carbon, silicon
Diatomaceous earth, water are using weight ratio as 3:2:10 are mixed, and mixture is fed through in vaporising device and is evaporated 14-17 minutes；
B) mixture after evaporation is put into screening plant and carries out sieving granulation, the particle after sieving is put into baking
It is dried in equipment for drying；
C) particle after step 2) drying is put into 65% hydrochloric acid solution, and particle is carried out immersion 30-50
Afterwards, it carries out standing 1-2 hours after mixture being warming up to 30-35 DEG C with the heating rate of 1 DEG C/min, particle is taken out, and will
Particle standing is dried；Particle is placed again into solution, mixture is warming up to 45-50 DEG C with the heating rate of 5 DEG C/min
After standing 2-4 hours afterwards, particle is taken out, and particle standing is dried；
D) particle after standing is put into drying unit and carries out drying 20-25 minutes, you can cleaning particle is made.
As a modification of the present invention, the processing step of the filtered fluid in the step (5) after filtering is as follows：
(a) zeolite molecular sieve is put into after carrying out impregnating 2-3 hours into 60% vulcanized sodium, zeolite molecular sieve is taken out,
And zeolite molecular sieve is drained at 20-25 DEG C；The mass ratio of zeolite molecular sieve and vulcanized sodium is 3:2；
(b) after the zeolite molecular sieve after draining is added in into filtered fluid and stand 50-60 minutes, by filtered fluid directly into
Row discharge；The mass ratio of the zeolite molecular sieve and filtered fluid is 1:7.
As a result of more than technology, the present invention compared with the prior art, has the advantage that as follows：
The invention discloses a kind of efficient preparation processes of stannous chloride, effectively increase reaction speed, reduce steam and disappear
Consumption, improves yield, and raw material is easy to get, and low energy consumption, and technological process is short, and process conditions are simple, and operation is easy, equipment investment expense
It is low, it is discharged after being adsorbed to the filtered fluid of generation, is effectively reduced environmental pollution；The waste water generated in production process of the present invention
It is few, and the rate of recovery is high.
The present invention is pre-processed by losing plate to useless copper oxide, effectively removes the impurity of useless copper oxide erosion plate surface, has
Effect improves the organic efficiency of useless copper oxide erosion plate, so as to effectively increase stannous chloride purity.
Specific embodiment
With reference to embodiment, the present invention is furture elucidated.
Embodiment 1：
A kind of efficient preparation process of stannous chloride, is as follows：
(1) it will pass through in pretreated useless copper oxide erosion plate and add in copper oxide, the pH value for adjusting solution is 1.5；
(2) mixed liquor is filtered, and removes the insoluble matter in mixed liquor；
(3) dilute hydrochloric acid solution, copper oxychloride solution are added in into the filtered fluid after filtering, and control in solution copper ion with
The mass ratio of chlorion is 62: 38；
(4) after the solution after step (3) is reacted is heated to 57 DEG C, reducing agent is added in, when solution becomes light brown from green
During color, stop adding in reducing agent；Reducing agent is the mixture of sulfur dioxide, sodium sulfite in the step (4)；
(5) add in water into the mixture after step (4) reaction, precipitated after stirring rinsing, by mixture be passed through to
It is filtered in filter device, takes filtrate；
(6) filtrate is followed by stirring and washing with dilute hydrochloric acid, the mixture after washing is carried out by vacuum suction filter
It filters；The dilute hydrochloric acid is the dilute hydrochloric acid of concentration 3%；The agitator treating time is 30 minutes；
(7) ethyl alcohol will be added in filtered solid mixt to wash, the mixture after washing is put into filtering
It is filtered in device；The number of ethyl alcohol washing is 6 times；
(8) filtrate after filtering is put into and is dried into drying device, you can obtain stannous chloride；The step
(8) the dry time is 60 DEG C in, and the time of the drying is 2.5 hours.
The pre-treatment step of the copper oxide that gives up in the step (1) erosion plate is as follows：1) useless copper oxide erosion plate is crushed, to
Material after crushing, which is fed through in cleaning device, to be cleaned；
2) pure water will be added in, and solution is heated to 80 DEG C in the useless copper oxide erosion plate after cleaning；
3) by sodium phosphate, dibastic sodium phosphate, sodium bicarbonate, water using mass ratio as 3:3:1:After 8 are mixed, add in by step
Useless copper oxide erosion plate after rapid 2) immersion, and impregnate 40 minutes；
4) the useless copper oxide erosion plate after immersion is put into and is cleaned multiple times into water, and clean to the pH value of water lotion and be
5；
5) cleaning particle is put into mixed solution, adds in water and be stirred, and mixture be powered 2 hours
Afterwards, the useless copper oxide added in into the mixture after energization after step (4) cleaning loses plate, and mixture is carried out immersion 20
After minute, useless copper oxide erosion plate is taken out, you can complete the pretreatment to the copper oxide erosion plate that gives up；The water added in the step 5)
Mass ratio with cleaning particle is 3:7.
The production technology of cleaning particle is as follows in the step 5)：A) by activated carbon, diatomite, water using weight ratio as 3:2:
10 are mixed, and mixture is fed through in vaporising device and is evaporated 17 minutes；
B) mixture after evaporation is put into screening plant and carries out sieving granulation, the particle after sieving is put into baking
It is dried in equipment for drying；
C) particle after step 2) drying is put into 65% hydrochloric acid solution, and particle is carried out after impregnating 30,
It carries out standing 1 hour after mixture is warming up to 35 DEG C with the heating rate of 1 DEG C/min, particle be taken out, and particle is stood
It dries；Particle is placed again into solution, 2 hours are stood after mixture is warming up to 50 DEG C with the heating rate of 5 DEG C/min
Afterwards, particle is taken out, and particle standing is dried；
D) particle after standing is put into drying unit and carries out drying 25 minutes, you can cleaning particle is made.
After measured according to this method produce stannous chloride product in, weight ratio >=99.3% of pure stannous chloride, high-copper
Weight ratio≤1% of salt, weight ratio≤0.1% of acid non-soluble substance, weight ratio≤0.005% of iron, the weight ratio of sulfate≤
0.3%.
Embodiment 2：
A kind of efficient preparation process of stannous chloride, is as follows：
(1) it will pass through in pretreated useless copper oxide erosion plate and add in copper oxide, the pH value for adjusting solution is 2；
(2) mixed liquor is filtered, and removes the insoluble matter in mixed liquor；
(3) dilute hydrochloric acid solution, copper oxychloride solution are added in into the filtered fluid after filtering, and control in solution copper ion with
The mass ratio of chlorion is 62: 38；
(4) after the solution after step (3) is reacted is heated to 50 DEG C, reducing agent is added in, when solution becomes light brown from green
During color, stop adding in reducing agent；Reducing agent is the mixture of sulfur dioxide, sodium sulfite in the step (4)；
(5) add in water into the mixture after step (4) reaction, precipitated after stirring rinsing, by mixture be passed through to
It is filtered in filter device, takes filtrate；
(6) filtrate is followed by stirring and washing with dilute hydrochloric acid, the mixture after washing is carried out by vacuum suction filter
It filters；The dilute hydrochloric acid is the dilute hydrochloric acid of concentration 3%；The agitator treating time is 45 minutes；
(7) ethyl alcohol will be added in filtered solid mixt to wash, the mixture after washing is put into filtering
It is filtered in device；The number of ethyl alcohol washing is 3 times；
(8) filtrate after filtering is put into and is dried into drying device, you can obtain stannous chloride；The step
(8) the dry time is 80 DEG C in, and the time of the drying is 1.5 hours.
The pre-treatment step of the copper oxide that gives up in the step (1) erosion plate is as follows：1) useless copper oxide erosion plate is crushed, to
Material after crushing, which is fed through in cleaning device, to be cleaned；
2) pure water will be added in, and solution is heated to 90 DEG C in the useless copper oxide erosion plate after cleaning；
3) by sodium phosphate, dibastic sodium phosphate, sodium bicarbonate, water using mass ratio as 3:3:1:After 8 are mixed, add in by step
Useless copper oxide erosion plate after rapid 2) immersion, and impregnate 30 minutes；
4) the useless copper oxide erosion plate after immersion is put into and is cleaned multiple times into water, and clean to the pH value of water lotion and be
6；
5) cleaning particle is put into mixed solution, adds in water and be stirred, and mixture be powered 1 hour
Afterwards, the useless copper oxide added in into the mixture after energization after step (4) cleaning loses plate, and mixture is carried out immersion 50
After minute, useless copper oxide erosion plate is taken out, you can complete the pretreatment to the copper oxide erosion plate that gives up；The water added in the step 5)
Mass ratio with cleaning particle is 3:7.
The production technology of cleaning particle is as follows in the step 5)：A) by activated carbon, diatomite, water using weight ratio as 3:2:
10 are mixed, and mixture is fed through in vaporising device and is evaporated 14 minutes；
B) mixture after evaporation is put into screening plant and carries out sieving granulation, the particle after sieving is put into baking
It is dried in equipment for drying；
C) particle after step 2) drying is put into 65% hydrochloric acid solution, and particle is carried out after impregnating 50,
It carries out standing 2 hours after mixture is warming up to 30 DEG C with the heating rate of 1 DEG C/min, particle be taken out, and particle is stood
It dries；Particle is placed again into solution, 4 hours are stood after mixture is warming up to 45 DEG C with the heating rate of 5 DEG C/min
Afterwards, particle is taken out, and particle standing is dried；
D) particle after standing is put into drying unit and carries out drying 20 minutes, you can cleaning particle is made.
After measured according to this method produce stannous chloride product in, weight ratio >=99.3% of pure stannous chloride, high-copper
Weight ratio≤1% of salt, weight ratio≤0.1% of acid non-soluble substance, weight ratio≤0.005% of iron, the weight ratio of sulfate≤
0.3%.
Embodiment 3：
A kind of efficient preparation process of stannous chloride, is as follows：
(1) it will pass through in pretreated useless copper oxide erosion plate and add in copper oxide, the pH value for adjusting solution is 2；
(2) mixed liquor is filtered, and removes the insoluble matter in mixed liquor；
(3) dilute hydrochloric acid solution, copper oxychloride solution are added in into the filtered fluid after filtering, and control in solution copper ion with
The mass ratio of chlorion is 62: 38；
(4) after the solution after step (3) is reacted is heated to 53 DEG C, reducing agent is added in, when solution becomes light brown from green
During color, stop adding in reducing agent；Reducing agent is the mixture of sulfur dioxide, sodium sulfite in the step (4)；
(5) add in water into the mixture after step (4) reaction, precipitated after stirring rinsing, by mixture be passed through to
It is filtered in filter device, takes filtrate；
(6) filtrate is followed by stirring and washing with dilute hydrochloric acid, the mixture after washing is carried out by vacuum suction filter
It filters；The dilute hydrochloric acid is the dilute hydrochloric acid of concentration 3%；The agitator treating time is 42 minutes；
(7) ethyl alcohol will be added in filtered solid mixt to wash, the mixture after washing is put into filtering
It is filtered in device；The number of ethyl alcohol washing is 5 times；
(8) filtrate after filtering is put into and is dried into drying device, you can obtain stannous chloride；The step
(8) the dry time is 78 DEG C in, and the time of the drying is 1.5 hours.
The pre-treatment step of the copper oxide that gives up in the step (1) erosion plate is as follows：1) useless copper oxide erosion plate is crushed, to
Material after crushing, which is fed through in cleaning device, to be cleaned；
2) pure water will be added in, and solution is heated to 85 DEG C in the useless copper oxide erosion plate after cleaning；
3) by sodium phosphate, dibastic sodium phosphate, sodium bicarbonate, water using mass ratio as 3:3:1:After 8 are mixed, add in by step
Useless copper oxide erosion plate after rapid 2) immersion, and impregnate 32 minutes；
4) the useless copper oxide erosion plate after immersion is put into and is cleaned multiple times into water, and clean to the pH value of water lotion and be
5；
5) cleaning particle is put into mixed solution, adds in water and be stirred, and mixture be powered 1 hour
Afterwards, the useless copper oxide added in into the mixture after energization after step (4) cleaning loses plate, and mixture is carried out immersion 33
After minute, useless copper oxide erosion plate is taken out, you can complete the pretreatment to the copper oxide erosion plate that gives up；The water added in the step 5)
Mass ratio with cleaning particle is 3:7.
The production technology of cleaning particle is as follows in the step 5)：A) by activated carbon, diatomite, water using weight ratio as 3:2:
10 are mixed, and mixture is fed through in vaporising device and is evaporated 15 minutes；
B) mixture after evaporation is put into screening plant and carries out sieving granulation, the particle after sieving is put into baking
It is dried in equipment for drying；
C) particle after step 2) drying is put into 65% hydrochloric acid solution, and particle is carried out after impregnating 30,
It carries out standing 1 hour after mixture is warming up to 34 DEG C with the heating rate of 1 DEG C/min, particle be taken out, and particle is stood
It dries；Particle is placed again into solution, 3 hours are stood after mixture is warming up to 47 DEG C with the heating rate of 5 DEG C/min
Afterwards, particle is taken out, and particle standing is dried；
D) particle after standing is put into drying unit and carries out drying 23 minutes, you can cleaning particle is made.
After measured according to this method produce stannous chloride product in, weight ratio >=99.3% of pure stannous chloride, high-copper
Weight ratio≤1% of salt, weight ratio≤0.1% of acid non-soluble substance, weight ratio≤0.005% of iron, the weight ratio of sulfate≤
0.3%.
Above-described embodiment is only the preferred technical solution of the present invention, and is not construed as the limitation for the present invention, the present invention
Protection domain should with claim record technical solution, including claim record technical solution in technical characteristic etc.
It is protection domain with alternative, i.e., equivalent replacement within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of efficient preparation process of stannous chloride, which is characterized in that be as follows：
(1) it will pass through in pretreated useless copper oxide erosion plate and add in copper oxide, the pH value for adjusting solution is 1.5-2；
(2) mixed liquor is filtered, and removes the insoluble matter in mixed liquor；
(3) dilute hydrochloric acid solution, copper oxychloride solution are added in into the filtered fluid after filtering, and control in solution copper ion and chlorine from
The mass ratio of son is 62: 38；
(4) after the solution after step (3) is reacted is heated to 50-57 DEG C, reducing agent is added in, when solution becomes light brown from green
When, stop adding in reducing agent；
(5) water is added in into the mixture after step (4) reaction, is precipitated after stirring rinsing, mixture is passed through to filtering
It is filtered in device, takes filtrate；
(6) filtrate is followed by stirring and washing with dilute hydrochloric acid, the mixture after washing is filtered by vacuum suction filter；
(7) ethyl alcohol will be added in filtered solid mixt to wash, the mixture after washing is put into filter device
In be filtered；
(8) filtrate after filtering is put into and is dried into drying device, you can obtain stannous chloride.
2. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：It is dilute in the step (6)
Hydrochloric acid is the dilute hydrochloric acid of concentration 3%.
3. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：It is stirred in the step (6)
It is 30-45 minutes to mix wash time.
4. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：Second in the step (7)
The number of alcohol washing is 3-6 times.
5. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：It is done in the step (8)
The dry time is 60-80 DEG C, and the time of the drying is 1.5-2.5 hours.
6. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：In the step (4) also
Former agent is sulfur dioxide, the mixture of sodium sulfite.
7. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：It gives up in the step (1)
The pre-treatment step of copper oxide erosion plate is as follows：1) useless copper oxide erosion plate is crushed, the material after crushing is fed through cleaning
It is cleaned in device；
2) pure water will be added in, and solution is heated to 80-90 DEG C in the useless copper oxide erosion plate after cleaning；
3) by sodium phosphate, dibastic sodium phosphate, sodium bicarbonate, water using mass ratio as 3:3:1:After 8 are mixed, add in by step 2)
Useless copper oxide erosion plate after immersion, and impregnate 30-40 minutes；
4) the useless copper oxide erosion plate after immersion is put into and is cleaned multiple times into water, and it is 5-6 to clean to the pH value of water lotion；
5) cleaning particle is put into mixed solution, adds in water and be stirred, and after mixture is carried out energization 1-2 hours,
The useless copper oxide added in into the mixture after energization after step (4) cleaning loses plate, and mixture is carried out immersion 20-50
After minute, useless copper oxide erosion plate is taken out, you can complete the pretreatment to the copper oxide erosion plate that gives up.
8. a kind of efficient preparation process of stannous chloride according to claim 7, it is characterised in that：It is added in the step 5)
Water and cleaning particle mass ratio be 3:7.
9. a kind of efficient preparation process of stannous chloride according to claim 7, it is characterised in that：It is cleaned in the step 5)
The production technology of particle is as follows：A) by activated carbon, diatomite, water using weight ratio as 3:2:10 are mixed, and mixture is sent into
It is evaporated into vaporising device 14-17 minutes；
B) mixture after evaporation is put into screening plant and carries out sieving granulation, the particle after sieving is put into drying and is filled
It is dried in putting；
C) particle after step 2) drying is put into 65% hydrochloric acid solution, and after particle is carried out immersion 30-50, it will
Mixture carries out standing 1-2 hours after being warming up to 30-35 DEG C with the heating rate of 1 DEG C/min, particle is taken out, and particle is quiet
It puts and dries；Particle is placed again into solution, is stood after mixture is warming up to 45-50 DEG C with the heating rate of 5 DEG C/min
After 2-4 hours, particle is taken out, and particle standing is dried；
D) particle after standing is put into drying unit and carries out drying 20-25 minutes, you can cleaning particle is made.
10. a kind of efficient preparation process of stannous chloride according to claim 1, it is characterised in that：Mistake in the step (5)
The processing step of filtered fluid after filter is as follows：
(a) zeolite molecular sieve is put into after carrying out impregnating 2-3 hours into 60% vulcanized sodium, zeolite molecular sieve is taken out, and will
Zeolite molecular sieve drains at 20-25 DEG C；The mass ratio of zeolite molecular sieve and vulcanized sodium is 3:2；
(b) after the zeolite molecular sieve after draining is added in into filtered fluid and stand 50-60 minutes, filtered fluid is directly arranged
It puts；The mass ratio of the zeolite molecular sieve and filtered fluid is 1:7.
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| CN201810168487.2A CN108264082A (en) | 2018-02-28 | 2018-02-28 | A kind of efficient preparation process of stannous chloride |
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| CN201810168487.2A CN108264082A (en) | 2018-02-28 | 2018-02-28 | A kind of efficient preparation process of stannous chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112062148A (en) * | 2020-09-09 | 2020-12-11 | 东华大学 | Method for preparing cuprous chloride by using copper-containing sludge in electroplating circuit board wastewater |
-
2018
- 2018-02-28 CN CN201810168487.2A patent/CN108264082A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112062148A (en) * | 2020-09-09 | 2020-12-11 | 东华大学 | Method for preparing cuprous chloride by using copper-containing sludge in electroplating circuit board wastewater |
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Application publication date: 20180710 |