CN110466090A - A method of recycling silver and PET film from HW16 waste photographic film - Google Patents
A method of recycling silver and PET film from HW16 waste photographic film Download PDFInfo
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- CN110466090A CN110466090A CN201910854043.9A CN201910854043A CN110466090A CN 110466090 A CN110466090 A CN 110466090A CN 201910854043 A CN201910854043 A CN 201910854043A CN 110466090 A CN110466090 A CN 110466090A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/06—Chloridising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B2017/001—Pretreating the materials before recovery
- B29B2017/0015—Washing, rinsing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The method that the invention discloses a kind of to recycle silver and PET film from HW16 waste photographic film, belongs to waste photographic film processing technology field, comprising the following steps: (a) film is torn up；(b) reaction is impregnated；(c) material is taken out in drain；(d) friction cleaning；(e) it rinses；(f) spray washing；(g) it is dehydrated；(h) PET plastic made from step (g) is stored in packaging bag；(i) heavy silver；(j) it filters；(k) stirring and dissolving；(l) silver is mentioned.The present invention is impregnated using 75~85 DEG C of solution, makes the organo-functional group in gelatin molecule by OH‑It destroys, and then changes its adhesiveness and be detached from, so that PET base material be made to separate with silver halide.Utilize FeCl3Ag is recovered in solution to the maximum extent, then AgCl is dissolved with dodium thiosulfate.In addition, using backwash technique, when solving traditional handicraft and recycling silver from waste photographic film, leads to the problem of a large amount of waste water, increases cost for wastewater treatment, waste water resource.
Description
Technical field
The invention belongs to waste photographic film processing technology fields, and in particular to one kind recycles silver from HW16 waste photographic film
With the method for PET film.
Background technique
Electronic components fabrication and the photographic film of printing are the substrates that PET film gelatin bonding silver halide is formed, bright
Glue is well known natural polymer, at present the technique of recycling silver, usually using acid soak demoulding, although having to recycling silver
Benefit is still not enough the elution of gelatin, it is difficult to be recovered to clean PET plastic fragment.
Summary of the invention
The method that the purpose of the present invention is to provide a kind of to recycle silver and PET film from HW16 waste photographic film, uses
This kind of method handles waste photographic film, can recycle silver and obtain clean PET plastic fragment.
Based on object above, the present invention takes following technical scheme: one kind recycling silver and PET from HW16 waste photographic film
The method of film, comprising the following steps: a method of silver and PET film are recycled from HW16 waste photographic film, including following
Step:
(a) film is torn up: the obtained waste photographic film of recycling is put into shredder, it be length is 2~3cm that PET film, which is torn,
Width is the strip of 1~2cm；
(b) it impregnates reaction: above-mentioned oddments investment being equipped in the pyroreaction pot of 10%NaOH soak, in pyroreaction pot
Have blade stirring soak, 75 ~ 85 DEG C is heated to the soak in pyroreaction pot using water vapour, and maintain 2 ~ 2.5h
On, so that the gelatin layer adhered on waste photographic film is completely disengaged film, the soak after reaction is a waste liquid；
(c) material is taken out in drain: after the completion of immersion, waste liquid being evacuated to precipitation reaction kettle from the leakage fluid dram of pyroreaction pot with pump；
Under stiring, oddments is delivered to from the pyroreaction the bottom of a pan by spiral pumping material machine the friction for being contained with acid friction cleaning agent
In cleaning machine；
(d) friction cleaning: film of the broken PET film in friction cleaning machine by acidity friction cleaning agent friction washing, after washing
It is rinsed into potcher；Water after washing is secondary liquid waste；
(e) it rinses: being contained with rinsing clear water in potcher, the film into potcher is crossed rinse water and tentatively rinsed, preliminary to rinse
Film afterwards is sent to shower water washing machine by screw conveyor and carries out secondary cleaning；Water after preliminary rinsing is waste liquid three times；
(f) spray washing: the oddments after preliminary rinsing is transported in the spray pond low side water in shower water washing machine, and in spiral shell
It revolves and moves forward under the push of pusher toward slant height end, the clear water sprayed during Forward by the top shower nozzle in shower water washing machine
It washes away, dewaterer is finally sent by spiral pusher machine；The ejected wash water overflowed from the spray pond low side of shower water washing machine is useless four times
Liquid；
(g) be dehydrated: the oddments for being sent to dewaterer is dehydrated in dewaterer, after the process, obtains clean regeneration
PET base material oddments；
(h) PET plastic made from step (g) is stored in packaging bag；
(i) heavy silver: after the waste liquid that step (b) generates is pumped into precipitation reaction kettle, be added dilute HCl adjust the PH of solution be 3.7 ~
4.2, then it is gradually added into saturation FeCl3Solution, stirring at normal temperature react 25 ~ 35min, are then allowed to stand 15 ~ 25min of ageing, until
Until not generating precipitating；
(j) it filters: the resulting mixture of step (i) being drained into suction filtration tank from the discharge port of precipitation reaction kettle and is separated by solid-liquid separation,
Sediment AgCl and filtrate are obtained, filtrate is delivered to electric Fenton treatment process；
(k) stirring and dissolving: the resulting sediment AgCl of step (j) is put into added with 10%Na2S2O3It is stirred in the dissolving tank of lysate
Dissolution is mixed, until precipitating is completely dissolved；
(l) it mentions silver: the solution after reaction in step (k) being pumped into silver recovery unit, solution handles to obtain elemental silver through silver recovery unit, mentions silver
Waste liquid afterwards is five waste liquids.
The present invention is easy to the principle being denaturalized under basic conditions using natural polymer gelatin, heats when impregnating, and tie up
75 ~ 85 DEG C are held, 2h or more is reacted, makes the organo-functional group in gelatin molecule by OH-It destroys, and then changes its adhesiveness and take off
From so that PET plastic film be made to separate with silver halide.
Reaction principle: gelatin+10%NaOH → destruction organo-functional group.
Utilize FeCl3The principle that Ag can be aoxidized, is recovered in Ag in solution to the maximum extent, at the same using dodium thiosulfate with
The strong feature of silver ion complexation ability, dissolves AgCl, is electrolysed into silver recovery unit, recycles elemental silver.
The chemical principle are as follows: 2FeCl3+ 4Ag = 4AgCl+ 2FeCl2；
Ag++ Cl-= AgCl↓；
AgCl+ 2Na2S2O3=Na3[Ag(S2O3)2]+ NaCl；Na3[Ag(S2O3)2] electrolysis.
Further, the secondary liquid waste is for the 10%NaOH soak in preparation steps (a)；The waste drains pump three times
After out, for the acid friction cleaning agent in preparation steps (d)；Four waste liquids are for the rinse water in step (e)；It is described
Five waste liquids are for the acid-base neutralization treatment process in step (i).
The present invention uses backwash technique, which does not generate other extra waste water, saved water resource, reduces
Environmental pollution, save the cost is practical, when solving traditional handicraft and recycling silver from waste photographic film, generates a large amount of useless
Water increases the problem of cost for wastewater treatment, waste water resource.
The present invention is torn up waste photographic film by shredder, and the waste photographic film torn up uses dipping by lye, more favorably
In the recycling of silver.
Further, it in step (b), is heated when impregnating, 80 DEG C is heated to the solution in pyroreaction pot, and maintain
2h。
Further, in step (i), dilute HCl is added and adjusts solution, until the PH of a waste liquid is 4, be then gradually added into
It is saturated FeCl3Solution, stirring at normal temperature react 30min, ageing 20min are then allowed to stand, until not generating precipitating.
Using clear water plus 1%H2S04The faintly acid backwash of solution, be not only able to make PET film washing more completely and not
A large amount of waste water can be generated.
The present invention uses 10%Na2S2O3Lysate is reacted with AgCl, which can directly meet silver recovery unit
Operating condition, with the treatment process of silver recovery unit recycling elemental silver, practicability is high.
Acid friction cleaning agent is 1%H in the present invention2S04Solution, washes clean of being subject to are qualified.
Compared with prior art, the invention has the benefit that
1, the principle that the present invention is easy to be denaturalized under basic conditions using natural polymer gelatin is made bright using heating infusion method
Organo-functional group in xanthan molecule is by OH-It destroys, and then changes its adhesiveness and be detached from, to make PET film and silver halide point
From.Utilize FeCl3The principle that Ag can be aoxidized, is recovered in Ag in solution to the maximum extent, at the same using dodium thiosulfate and silver from
The strong feature of sub- complexing power, using 10%Na2S2O3Solution is reacted with AgCl, which can directly meet and mention
Silver-colored machine operating condition, with the treatment process of silver recovery unit recycling elemental silver, practicability is high.
2, the present invention uses backwash technique, which does not generate other extra waste water, saved water resource, subtracted
Environmental pollution is lacked, save the cost is practical, when solving traditional handicraft and recycling silver from waste photographic film, generates a large amount of useless
Water increases the problem of cost for wastewater treatment, waste water resource.
3, the heavy silver-colored treatment process of the present invention can directly meet silver recovery unit operation using the silver chlorate that dodium thiosulfate dissolution generates
Condition recycles silver with silver recovery unit.
4, the present invention is torn up waste photographic film by shredder, and the waste photographic film torn up uses dipping by lye, is more had
Conducive to the recycling of silver.
Detailed description of the invention
Fig. 1 is the process flow chart of the embodiment of the present invention one.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings of the specification, it is clear that described embodiment is this
The most preferred embodiment of invention.
As shown in Figure 1, a kind of method for recycling silver and PET film from HW16 waste photographic film, comprising the following steps: one
The method that kind recycles silver and PET film from HW16 waste photographic film, comprising the following steps:
(a) film is torn up: the obtained waste photographic film of recycling is put into shredder, it be length is 2~3cm that PET film, which is torn,
Width is the strip of 1~2cm；
(b) it impregnates reaction: above-mentioned oddments investment being equipped in the pyroreaction pot of 10%NaOH soak, in pyroreaction pot
Have blade stirring soak, 75 ~ 85 DEG C is heated to the soak in pyroreaction pot using water vapour, and maintain 2 ~ 2.5h
On, so that the gelatin layer adhered on waste photographic film is completely disengaged film, the soak after reaction is a waste liquid；
(c) material is taken out in drain: after the completion of immersion, waste liquid being evacuated to precipitation reaction kettle from the leakage fluid dram of pyroreaction pot with pump；
Under stiring, oddments is delivered to from the pyroreaction the bottom of a pan by spiral pumping material machine the friction for being contained with acid friction cleaning agent
In cleaning machine；
(d) friction cleaning: film of the broken PET film in friction cleaning machine by acidity friction cleaning agent friction washing, after washing
It is rinsed into potcher；Water after washing is secondary liquid waste；Acidity friction cleaning agent is 1%H2S04Solution；
(e) it rinses: being contained with rinsing clear water in potcher, the film into potcher is crossed rinse water and tentatively rinsed, preliminary to rinse
Film afterwards is sent to shower water washing machine by screw conveyor and carries out secondary cleaning；Water after preliminary rinsing is waste liquid three times；
(f) spray washing: the oddments after preliminary rinsing is transported in the spray pond low side water in shower water washing machine, and in spiral shell
It revolves and moves forward under the push of pusher toward slant height end, the clear water sprayed during Forward by the top shower nozzle in shower water washing machine
It washes away, dewaterer is finally sent by spiral pusher machine；The ejected wash water overflowed from the spray pond low side of shower water washing machine is useless four times
Liquid；
(g) be dehydrated: the oddments for being sent to dewaterer is dehydrated in dewaterer, after the process, obtains clean regeneration
PET base material oddments；
(h) PET plastic made from step (g) is stored in packaging bag；
(i) heavy silver: after the waste liquid that step (b) generates is pumped into precipitation reaction kettle, be added dilute HCl adjust the PH of solution be 3.7 ~
4.2, then it is gradually added into saturation FeCl3Solution, stirring at normal temperature react 25 ~ 35min, are then allowed to stand 15 ~ 25min of ageing, until
Until not generating precipitating；
(j) it filters: the resulting mixture of step (i) being drained into suction filtration tank from the discharge port of precipitation reaction kettle and is separated by solid-liquid separation,
Sediment AgCl and filtrate are obtained, filtrate is delivered to electric Fenton treatment process；
(k) stirring and dissolving: the resulting sediment AgCl of step (j) is put into added with 10%Na2S2O3It is stirred in the dissolving tank of lysate
Dissolution is mixed, until precipitating is completely dissolved；
(l) it mentions silver: the solution after reaction in step (k) being pumped into silver recovery unit, solution handles to obtain elemental silver through silver recovery unit, mentions silver
Waste liquid afterwards is five waste liquids.
The present invention is easy to the principle being denaturalized under basic conditions using natural polymer gelatin, heats when impregnating, and tie up
75 ~ 85 DEG C are held, 2h or more is reacted, makes the organo-functional group in gelatin molecule by OH-It destroys, and then changes its adhesiveness and take off
From so that PET film be made to separate with silver halide.
Reaction principle: gelatin+10%NaOH → destruction organo-functional group.
Utilize FeCl3The principle that Ag can be aoxidized, is recovered in Ag in solution to the maximum extent, at the same using dodium thiosulfate with
The strong feature of silver ion complexation ability, dissolves AgCl, into silver recovery unit electrolytic recovery elemental silver.
The chemical principle are as follows: 2FeCl3+4Ag=4AgCl+ 2FeCl2；
Ag++Cl-= AgCl↓；
AgCl+2 Na2S2O3=Na3[Ag(S2O3)2]+ NaCl；Na3[Ag(S2O3)2] electrolysis.
Further, the secondary liquid waste is for the 10%NaOH soak in preparation steps (a)；The waste drains pump three times
After out, for the acid friction cleaning agent in preparation steps (d)；Four waste liquids are for the rinse water in step (e)；It is described
Five waste liquids are for the acid-base neutralization treatment process in step (i).
The present invention uses backwash technique, which does not generate other extra waste water, saves water resource and reduces ring
Border pollution, save the cost are practical, when solving traditional handicraft and recycling silver from waste photographic film, generate a large amount of waste water, increasing
The problem of adding cost for wastewater treatment, waste water resource.
Embodiment two
Embodiment two and the technical solution of embodiment one are essentially identical, the difference is that: in the step (b) in embodiment two
Pyroreaction pot in solution be heated to 80 DEG C, and maintain temperature 2h.
Embodiment three
Embodiment three and the technical solution of embodiment two are essentially identical, the difference is that: the step in embodiment three is (i)
In, dilute HCl is added and adjusts solution, until the PH of a waste liquid is 4, is then gradually added into saturation FeCl3Solution, stirring at normal temperature are anti-
30min is answered, ageing 20min is then allowed to stand, until not generating precipitating.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method for recycling silver and PET film from HW16 waste photographic film, it is characterised in that: the following steps are included:
(a) film is torn up: the obtained waste photographic film of recycling is put into shredder, it be length is 2~3cm that PET film, which is torn,
Width is the strip of 1~2cm；
(b) it impregnates reaction: above-mentioned oddments investment being equipped in the pyroreaction pot of 10%NaOH soak, in pyroreaction pot
Have blade stirring soak, 75 ~ 85 DEG C is heated to the soak in pyroreaction pot using water vapour, and maintain 2 ~ 2.5h
On, so that the gelatin layer adhered on waste photographic film is completely disengaged film, the soak after reaction is a waste liquid；
(c) material is taken out in drain: after the completion of immersion, waste liquid being evacuated to precipitation reaction kettle from the leakage fluid dram of pyroreaction pot with pump；
Under stiring, oddments is delivered to from the pyroreaction the bottom of a pan by spiral pumping material machine the friction for being contained with acid friction cleaning agent
In cleaning machine；
(d) friction cleaning: film of the broken PET film in friction cleaning machine by acidity friction cleaning agent friction washing, after washing
It is rinsed into potcher；Water after washing is secondary liquid waste；
(e) it rinses: being contained with rinsing clear water in potcher, the film into potcher is crossed rinse water and tentatively rinsed, preliminary to rinse
Film afterwards is sent to shower water washing machine by screw conveyor and carries out secondary cleaning；Water after preliminary rinsing is waste liquid three times；
(f) spray washing: the oddments after preliminary rinsing is transported in the spray pond low side water in shower water washing machine, and in spiral shell
It revolves and moves forward under the push of pusher toward slant height end, the clear water sprayed during Forward by the top shower nozzle in shower water washing machine
It washes away, dewaterer is finally sent by spiral pusher machine；The ejected wash water overflowed from the spray pond low side of shower water washing machine is useless four times
Liquid；
(g) be dehydrated: the oddments for being sent to dewaterer is dehydrated in dewaterer, after the process, obtains clean regeneration
PET base material oddments；
(h) PET plastic made from step (g) is stored in packaging bag；
(i) heavy silver: after the waste liquid that step (b) generates is pumped into precipitation reaction kettle, be added dilute HCl adjust the PH of solution be 3.7 ~
4.2, then it is gradually added into saturation FeCl3Solution, stirring at normal temperature react 25 ~ 35min, are then allowed to stand 15 ~ 25min of ageing, until
Until not generating precipitating；
(j) it filters: the resulting mixture of step (i) being drained into suction filtration tank from the discharge port of precipitation reaction kettle and is separated by solid-liquid separation,
Sediment AgCl and filtrate are obtained, filtrate is delivered to electric Fenton treatment process；
(k) stirring and dissolving: the resulting sediment AgCl of step (j) is put into added with 10%Na2S2O3It is stirred in the dissolving tank of lysate
Dissolution is mixed, until precipitating is completely dissolved；
(l) it mentions silver: the solution after reaction in step (k) being pumped into silver recovery unit, solution handles to obtain elemental silver through silver recovery unit, mentions silver
Waste liquid afterwards is five waste liquids.
2. the method for silver and PET glue is recycled from HW16 waste photographic film as claimed in claim 2, it is characterised in that: described
Secondary liquid waste is for the 10%NaOH soak in preparation steps (a)；It is described after waste liquid pumps out three times, in preparation steps (d)
Acid friction cleaning agent；Four waste liquids are for the rinse water in step (e)；Five waste liquids are in step (i)
Acid-base neutralization treatment process.
3. the method for silver and PET glue is recycled from HW16 waste photographic film as claimed in claim 3, it is characterised in that: step
(b) in, 80 DEG C are heated to the solution in pyroreaction pot, and maintains temperature 2h.
4. the method a method according to any one of claims 1-3 for recycling silver and PET film from HW16 waste photographic film, feature exist
In: acid friction cleaning agent is 1%H in step (d)2S04Solution.
5. the method for silver and PET glue is recycled from HW16 waste photographic film as claimed in claim 4, it is characterised in that: step
In (i), it is 4 that dilute HCl, which is added, and adjusts the PH of a waste liquid, is then gradually added into FeCl3Solution, stirring at normal temperature react 30min, so
Still aging 20min afterwards, until no longer generating precipitating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910854043.9A CN110466090B (en) | 2019-09-10 | 2019-09-10 | Method for recovering silver and PET (polyethylene terephthalate) film from HW16 waste photosensitive film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910854043.9A CN110466090B (en) | 2019-09-10 | 2019-09-10 | Method for recovering silver and PET (polyethylene terephthalate) film from HW16 waste photosensitive film |
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| CN110466090A true CN110466090A (en) | 2019-11-19 |
| CN110466090B CN110466090B (en) | 2021-03-30 |
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| CN201910854043.9A Active CN110466090B (en) | 2019-09-10 | 2019-09-10 | Method for recovering silver and PET (polyethylene terephthalate) film from HW16 waste photosensitive film |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111330950A (en) * | 2020-03-16 | 2020-06-26 | 赵艳琴 | X-ray film centralized recovery device |
| CN114107665A (en) * | 2021-11-03 | 2022-03-01 | 韶关鹏瑞环保科技有限公司 | Film desilvering recovery process |
| CN115747503A (en) * | 2022-12-27 | 2023-03-07 | 江苏电科环保有限公司 | Improved recovery method of waste film |
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| CN111330950B (en) * | 2020-03-16 | 2022-08-23 | 湖南省肿瘤医院 | X-ray film centralized recovery device |
| CN114107665A (en) * | 2021-11-03 | 2022-03-01 | 韶关鹏瑞环保科技有限公司 | Film desilvering recovery process |
| CN115747503A (en) * | 2022-12-27 | 2023-03-07 | 江苏电科环保有限公司 | Improved recovery method of waste film |
| CN115747503B (en) * | 2022-12-27 | 2023-12-15 | 江苏电科环保有限公司 | Improved recovery method of waste film |
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