CN104910671B - The classified reclaiming method of various kinds of resin in the discarded paint of mixing - Google Patents
The classified reclaiming method of various kinds of resin in the discarded paint of mixing Download PDFInfo
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- CN104910671B CN104910671B CN201510308638.6A CN201510308638A CN104910671B CN 104910671 B CN104910671 B CN 104910671B CN 201510308638 A CN201510308638 A CN 201510308638A CN 104910671 B CN104910671 B CN 104910671B
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- resin
- paint
- mixed solvent
- dimethylbenzene
- slag
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- 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
Abstract
The invention discloses a kind of classified reclaiming method for mixing various kinds of resin in discarded paint, extract castaway slag using the mixed solvent of industrial naptha and dimethylbenzene, recovery obtain in, long oil alkyd；Castaway slag is extracted with xylene solvent, the recovery resin obtained based on epoxy resin, polyester resin is reclaimed；Castaway slag is extracted with the mixed solvent of dimethylbenzene and ketone, the recovery resin obtained based on acrylic resin is reclaimed；Castaway slag is extracted with the mixed solvent of dimethylbenzene and phenmethylol, the recovery resin obtained based on amino resins is reclaimed.The paint slag recovery method of the present invention, is extracted with the mixed paint slag for being suitable for multiclass paint, and the high resin rate of recovery, high waste recovery economy, environmental protection, the advantages of realizing real twice laid.
Description
Technical field
The present invention relates to the recovery and treatment method of discarded paint, and in particular to various kinds of resin in a kind of discarded paint of mixing
Classified reclaiming method.
Background technology
Generally applied in the coating process of hardware products using pressure-air spraying, high pressure airless spray, electrostatic spraying etc.
Work method.Generally, least a portion of coating is sprayed on workpiece in spraying operation, remaining largely all splashes
Arrive in paint spray booth or otherwise lost.At present, most domestic antitheft door, motorcycle, automobile fitting, hardware ＆ tools etc.
Producer is handled using installing cascade curtain in paint spray booth to collect the method for useless coating cloud, generally can all be produced substantial amounts of useless
Paint slag.For a medium-and-large-sized antitheft door enterprise, the paint slag produced for 1 year is no less than 5 tons, more than 10 ten thousand yuan of lost value.Estimate roughly
Meter is being described as the Zhejiang Yongkang of " the middle gateway of a country is all ", and the only antitheft door industry paint slag lost value of 1 year just reaches more than 5,000 ten thousand
Member.
And on the other hand handle these overboard contaminated waste painting slags of landing with wanting greenization then extremely difficult.Locate at present
Putting the method for paint slag mainly has landfill and burns.Although landfill disposal is simple, direct, a large amount of land resources are taken, and
Easily cause the environmental pollutions such as serious soil, water body；And during by burning disposal, due to the limitation of combustion technology be relatively also easy to produce it is useless
The secondary pollutions such as gas, waste residue.It is increasingly serious with China's problem of environmental pollution, and a series of related new legislations of environmental protection go out
Platform and constantly improve, the paint slag handling problems that existing hardware products and application relevant industries generally coexist carry out research and development
Just seem extremely important.
Since last decade, the country also begins to study the recovery and reusing and recycling method of paint slag.For example, Authorization Notice No. is
CN 102277027B Chinese invention patent document discloses a kind of preparing paint by recovering waste paint, mainly by following parts by weight
Raw material be made：Waste oil paint 4~6, gloss oil 2~3, glue 0.8~1.2, rouge and powder 0.4~0.6, toluene 0.8~1.2, first will
The waste oil paint and gloss oil of recovery are put into mixer, are sufficiently stirred for 120~150 minutes, are then added rouge and powder and are stirred 30 points
Clock, adds toluene, stirs 50 minutes, is eventually adding glue, and stirring contains stand-by in container for 60 minutes.
But the method for current disclosed report be all mostly by a variety of dewaterings to paint slag at
After reason, directly solid residue is ground, the raw material as low side paint after solid powder is prepared into, in the preparation technology of paint
Link adds to realize recovery.But it is due to that component is more complicated in the paint slag of recovery, different brands paint may be contained
The different pigment of different resins and different color, or even also have crosslinking curing, destroyed paint solid, and very
The impurity of many machineries, it is clear that so extensive, simple recovery method obtains paint slag regenerant and is not used to high-end paint
In, its organic efficiency and economic benefit are all very low.
The content of the invention
For the technical problem underlying significantly of two in solution Oil Paint Slag recycling：(1) because application producer may make simultaneously
With a variety of different paint kinds, the effective recycling of these complicated mixing paint slags how is realized, is particularly realized
Wherein the resin components with higher economic value are separately recovered, and this is an important technical problem；(2) how by oil
Painting the regenerant of slag is used in high-end painting, the product of at least former paint quality standard level, preferably improves and reclaims
The economic benefit of paint slag.The present invention provides a kind of classified reclaiming method for mixing various kinds of resin in discarded paint, according to mixed
The dissolving sex differernce of resin contained in discarded paint slag is closed, alkane, aromatic hydrocarbons, ester, ketone, alcohol equal solvent is respectively adopted and carries out successively
Extract, to realize being separately recovered for various types of resins in mixed paint slag, the resin of recovery, which can be used for preparing, has corresponding former paint
The painting of quality level, with larger economic benefit and environmental value.
A kind of classified reclaiming method for mixing various kinds of resin in discarded paint, comprises the following steps：
(1) paint slag must be dehydrated by being dehydrated after mixed paint slag is screened；The mixing of gasoline and dimethylbenzene is added into dehydration paint slag
Then solvent, stirring and dissolving stands, filters to obtain the first solid phase and the first liquid phase, the first liquid phase is handled through absorption, vacuum distillation
First reclaims resin；
(2) xylene solvent is added into the first solid phase, then stirring and dissolving stands, filters to obtain second solid phase and second
Liquid phase, second liquid phase handles to obtain the second recovery resin through absorption, vacuum distillation；
(3) add the mixed solvent of dimethylbenzene and ketone into second solid phase, stirring and dissolving, then stand, filter the 3rd
Solid phase and the 3rd liquid phase, the 3rd liquid phase handle to obtain the 3rd recovery resin through absorption, vacuum distillation；
(4) mixed solvent of dimethylbenzene and phenmethylol is added into the 3rd solid phase, then stirring and dissolving stands, filters
4th solid phase and the 4th liquid phase, the 4th liquid phase handle to obtain the 4th recovery resin through absorption, vacuum distillation.
4th solid phase is residual residue, and it is each that remaining residue is mainly that the resin of crosslinking and being difficult to dissolves in a solvent
Color pigment etc..
Preferably, the stirring and dissolving process in step (1)~(4) is carried out under 25-50 DEG C of constant temperature, and mixing time is 5-
12 hours.
Preferably, the addition of the mixed solvent of gasoline and dimethylbenzene and the volume mass ratio of dehydration paint slag in step (1)
For 1.5-4mL：1g；The mass volume ratio that the addition of xylene solvent paints slag with dehydration in step (2) is 1.5-4mL：1g；Step
Suddenly the mass volume ratio that the addition of the mixed solvent of dimethylbenzene and ketone paints slag with dehydration in (3) is 1.5-2mL：1g；Step (4)
The mass volume ratio that the addition of the mixed solvent of middle dimethylbenzene and phenmethylol paints slag with dehydration is 1.5-2mL：1g.I.e. each step
The quantity of solvent added in rapid is all on the basis of initial dehydration paint slag.
Mixing paint paint slag is handled according to the inventive method, it is in, long oil that step (1), which reclaims the first obtained resin,
Recovery resin based on alkyd resin；It is returning based on epoxy resin, polyester resin that step (2), which reclaims the second obtained resin,
Receive resin；It is the recovery resin based on acrylic resin that step (3), which reclaims the 3rd obtained resin,；Step (4) is reclaimed and obtained
The 4th resin be recovery resin based on amino resins.
Preferably, the liquid phase of step (1)~(4) obtains corresponding resin, corresponding solvent after absorption, vacuum distillation processing
Reclaimed.
The method of the present invention is extracted respectively by using different solvents reclaims the discarded mixture of the different paint of multiclass
Middle various types of resins.By mixed paint slag progress simple screening, after vacuum dehydration processing, discarded according to mixing contained by painting in slag
The dissolving sex differernce of resin, is respectively adopted alkane, aromatic hydrocarbons, ester, ketone, alcohol equal solvent and is extracted successively, to realize mixed paint slag
Middle various types of resins is separately recovered, paint slag recovery method of the invention, is carried with the mixed paint slag for being suitable for multiclass paint
Take, and the high resin rate of recovery, high waste recovery economy, environmental protection, the advantages of realizing real twice laid.
Preferably, the volume composition of in the mixed solvent dimethylbenzene is 0~40% in step (1)；Most preferably, dimethylbenzene
Volume composition is 40%.Gasoline used is common commercial goods, for example, No. 120 industrial napthas, No. 200 industrial napthas.
Preferably, the ketone of in the mixed solvent used in step (3) is at least one of butanone, acetone and cyclohexanone.
Preferably, the volume composition of in the mixed solvent ketone used in step (3) is 10-90%；Most preferably, the volume group of ketone
As 10%.
Preferably, the volume composition of in the mixed solvent phenmethylol used is 10-90% in step (4)；Most preferably, benzene first
The volume composition of alcohol is 10%.
Preferably, the absorption of filtrate uses charcoal absorption in step (1)~(4).
Preferably, dehydration is in step (1)：Mixed paint slag is subjected to mechanical presses, then the vacuum at 20-50 DEG C
Dry 30min-6h.
A kind of most preferred technical scheme：
(1) mechanical presses are carried out after mixed paint slag is screened, then vacuum drying 6h is dehydrated and must be dehydrated paint slag at 25 DEG C；
(2) (gasoline and dimethylbenzene volume ratio are 60 to the mixed solvent that gasoline and dimethylbenzene are added in paint slag to being dehydrated:40),
The volume mass ratio of mixed solvent and dehydration paint slag is 1.5mL：1g, 25 DEG C of constant temperature are stirred 12 hours, will be undissolved after standing
Paint slag is separated by filtration with mixed solvent, and filtrate is able to the recovery resin based on alkyd resin after being handled through absorption, vacuum distillation, mix
Bonding solvent is reclaimed；
(3) xylene solvent, the body of xylene solvent and dehydration paint slag are added into undissolved paint slag obtained by step (2)
Product mass ratio is 1.5mL：1g, 25 DEG C of constant temperature are stirred 12 hours, and undissolved paint slag is separated by filtration with dimethylbenzene after standing, is filtered
Liquid is able to epoxy resin, the recovery resin based on polyester resin after absorption, vacuum distillation processing, and dimethylbenzene is reclaimed；
(4) mixed solvent (dimethylbenzene and the butanone of dimethylbenzene and ketone are added in the undissolved paint slag of gained into step (3)
Volume ratio be 90:10), the volume mass ratio of mixed solvent and dehydration paint slag is 1.5mL：1g, 25 DEG C of constant temperature are stirred 12 hours,
Undissolved paint slag is separated by filtration with dimethylbenzene after standing, filtrate is able to acrylic resin after being handled through absorption, vacuum distillation
Based on recovery resin, mixed solvent reclaim；
(5) added into the undissolved paint slag of gained in step (4) dimethylbenzene and phenmethylol mixed solvent (dimethylbenzene and
Phenmethylol volume ratio is 90:10), the volume mass ratio of mixed solvent and dehydration paint slag is 1.5mL：1g, 50 DEG C of constant temperature stirrings 12
Hour, undissolved paint slag is separated by filtration with mixed solvent after standing, filtrate is able to amino after being handled through absorption, vacuum distillation
Recovery resin based on resin, mixed solvent is reclaimed.
Compared with prior art, beneficial effects of the present invention are shown：
(1) the hybrid resin classified reclaiming method of discarded paint disclosed by the invention, with Publication No. CN100540614C,
The patent documents such as CN102558938B are compared for the prior art of representative, the economic benefit with more preferable practicality and Geng Gao.
Because in actual production process, many application enterprises can all use various with different resins composition, different formulations or composition
Paint, therefore be all usually the mixture of various paint in the discarded Oil Paint Slag produced by these application enterprises, and
It is that the prior art of representative is usual all just for a class using patent documents such as Publication No. CN100540614C, CN102558938B
The recycling of paint slag, or simply directly crushed the paint slag solid after being handled with solvent distillation dehydration, as
Powder filler reuse, these recoverying and utilizing methods are not suitable for handling the mixture of a variety of discarded paint in fact, and reclaim
Economic benefit is very low, reclaims product and can be only applied in the painting of low side.
(2) mixed paint slag is dried in vacuo to the crosslinking that can avoid painting resin in slag in the present invention under 20-50 DEG C of low temperature
And solidification, so that it is guaranteed that the higher rate of recovery of each resin.
(3) the laboratory early stage knot of the invention according to various typical resins solubility studies in different solvents system
Really, the solvent with different solubility properties is respectively adopted to extract mixed paint slag specimen product successively, so as to effectively realization
Various types of resins is separately recovered in mixed paint slag.
(4) present invention carries out adsorption treatment in the extract solution of different solvents system with activated carbon, can be effectively to paint
Slag specimen product are decolourized, and obtain substantially colorless recovery resin, and these resins can apply to phase of the production with a variety of colors
Should high-grade paint.
Brief description of the drawings
Fig. 1 is the recovery resin infrared spectrum spectrogram in being able to, based on long oil alkyd；
Fig. 2 is the recovery resin infrared spectrum spectrogram based on be able to epoxy resin；
Fig. 3 is the recovery resin infrared spectrum spectrogram based on be able to acrylic resin；
Fig. 4 is the recovery resin infrared spectrum spectrogram based on be able to amino resins；
Each resin extraction process schematic diagram in the discarded Oil Paint Slag of Fig. 5 mixing.
Embodiment
Following examples are carried out according to the technological process shown in Fig. 5, and raw materials used is regular industrial raw material or commercially available
Commodity.
Embodiment 1
(1) the dark mixing number sample of paint slag obtained from certain enterprise, artificial to reject foreign matter and mechanical admixture, goes forward side by side
Row simple mechanical presses dehydration, is then placed in vacuum drying chamber 25 DEG C and dries 6 hours at room temperature.
(2) the clip 100g samples from dried paint slag, are placed in the reactor of belt stirrer, add No. 150mL200
Mixed solvent (solvent 1) (volume ratio 60 of industrial naptha and dimethylbenzene：40), stirred 12 hours at 25 DEG C of constant temperature, will after standing
Undissolved paint slag is separated by filtration with mixed solvent, and obtained filtrate 1, which is used, to be obtained after charcoal absorption, vacuum distillation with alkyd tree
Recovery naval stores 61g based on fat, its infrared spectrum spectrogram is as shown in Figure 1.Visible stronger middle long chain fatty acids in figure
Saturation VC-H(2955-2850cm-1)、δC-H(700-740cm-1), the unsaturated V on adjacent benzene dicarboxylic acidC-H(3062cm-1) and benzene
Ring skeleton vibrates (1580-1600cm-1), and ester bond VC=O(1731cm-1), and VCOO(1269,1121cm-1) etc. feature letter
Number.Illustrate that gained resin is mainly alkyd resin, its content is more than 85%.
(3) toward addition 150mL dimethylbenzene (solvent 2) in filter residue, stirred 12 hours at 25 DEG C of constant temperature, will be insoluble after standing
Paint slag separated with solvent filter, obtained filtrate 2 use is obtained after charcoal absorption, vacuum distillation based on epoxy resin return
Naval stores 15g is received, its infrared spectrum spectrogram is as shown in Figure 2.Unsaturation V on visible stronger bisphenol-A phenyl ring in figureC-H
(3054cm-1) and phenyl ring skeletal vibration (1456-1507,1580-1600cm-1), phenyl ring aligns disubstituted (829cm-1), and
The V of ehter bondC-O(1034,1183,1244cm-1) etc. characteristic signal.Illustrate that gained resin is mainly epoxy resin, its content exists
More than 95%.
(4) mixed solvent (solvent 3) (volume ratio 90 of addition 150mL dimethylbenzene and butanone into filter residue is continued：10), room
Stir 12 hours, separate undissolved paint slag with solvent filter after standing, obtained filtrate 3 is inhaled with activated carbon at 25 DEG C of temperature
It is attached, the recovery naval stores 18g based on acrylic resin is obtained after vacuum distillation, its infrared spectrum spectrogram is as shown in Figure 3.Figure
In saturation V in visible stronger polyacrylic acid backboneC-H(2960-2850cm-1), the V of ester bondC=O(1735cm-1), and VCOO
(1261,1166cm-1) etc. characteristic signal.Illustrate that gained resin is mainly acrylic resin, its content is more than 95%.
(5) mixed solvent (solvent 4) (volume ratio 90 of addition 150mL dimethylbenzene and phenmethylol into filter residue is continued：10),
Stir 12 hours, separate undissolved paint slag with solvent filter after standing, obtained filtrate 4 is inhaled with activated carbon at 50 DEG C of constant temperature
It is attached, the recovery naval stores 1g based on amino resins is obtained after vacuum distillation, and the solid residue 3g of slightly solubility is reclaimed, with
The infrared spectrum spectrogram of recovery naval stores based on amino resins is as shown in Figure 4.Visible stronger amino V in figureN-H
(3357cm-1), VC-N(1375cm-1), the V in ether and alcoholCOO(1086,1014cm-1) etc. characteristic signal.Illustrate gained resin master
If the amino resins of butyl ether, its content is more than 85%.
(6) reclaim the recycling of resin (by taking the preparation of alkyd resin iron oxide red anticorrosive paint as an example)：Based on mass parts 100, take
42 parts of the alkyd resin solution (solid content 50%) of recovery, 20 parts of iron oxide red, 5 parts of zinc yellow, 5 parts of zinc oxide, talcum powder 5
Part, 8 parts of barium sulfate, 10 parts of dimethylbenzene, dispersed with stirring is uniform, sand mill abrasive material 1.5 hours, when mixed material granularity is less than 30um
When discharge, add containing manganese naphthenate (0.2%), lead naphthenate (10%), zinc naphthenate (3%) 1.5 parts of drier solution,
Packed after adjusting suitable viscosity with surplus dimethylbenzene again.
It is control with commercialized alkyd resin solution (solid content 50%), alkyd resin iron is prepared using identical technique
Red antirust paint, is used as control sample.
Reclaim alkyd resin iron oxide red anticorrosive paint and alkyd resin iron oxide red antirust original paint (control sample) performance comparison is as follows：
Embodiment 2
(1) No. two samples of colourless mixing paint slag obtained from certain enterprise, it is artificial to reject foreign matter and mechanical admixture, go forward side by side
The simple extrusion dehydration of row, is then placed in vacuum drying chamber 50 DEG C and dries 0.5 hour at room temperature.
(2) the clip 100g samples from dried paint slag, are placed in the reactor of belt stirrer, add No. 400mL200
Mixed solvent (solvent 1) (volume ratio 100 of industrial naptha and dimethylbenzene：0), stirred 5 hours at 50 DEG C of constant temperature, will not after standing
Paint slag and the mixed solvent of dissolving are separated by filtration, the obtained water white transparency of filtrate 1, therefore need not use charcoal absorption, and decompression is steamed
The recovery naval stores 38g. based on alkyd resin is obtained after evaporating
(3) toward addition 400mL dimethylbenzene (solvent 2) in filter residue, stirred 5 hours at 50 DEG C of constant temperature, will be insoluble after standing
Paint slag separated with solvent filter, the obtained water white transparency of filtrate 2, thus need not use charcoal absorption, obtained after vacuum distillation
Recovery naval stores 20g based on epoxy resin.
(4) mixed solvent (solvent 3) (volume ratio 10 of addition 200mL dimethylbenzene and butanone into filter residue is continued：90), room
Stir 5 hours, separate undissolved paint slag with solvent filter after standing, obtained filtrate 3 at 25 DEG C of temperature, after vacuum distillation
To the recovery naval stores 36g based on acrylic resin.
(5) mixed solvent (solvent 4) (volume ratio 10 of addition 200mL dimethylbenzene and phenmethylol into filter residue is continued：90),
Stir 12 hours, separate undissolved paint slag with solvent filter after standing, obtained filtrate 4, vacuum distillation at 50 DEG C of constant temperature
The recovery naval stores 1g based on amino resins is obtained afterwards, and reclaims the solid residue 2g of slightly solubility.
Embodiment 3
(1) the dark mixing number sample of paint slag obtained from certain enterprise, artificial to reject foreign matter and mechanical admixture, goes forward side by side
The simple extrusion dehydration of row, is then placed in vacuum drying chamber 37 DEG C and dries 3 hours at room temperature.
(2) the clip 100g samples from dried paint slag, are placed in the reactor of belt stirrer, add 250mL solvents
Mixed solvent (solvent 1) (volume ratio 70 of gasoline and dimethylbenzene：30), stirred 8 hours at 37 DEG C of constant temperature, will be insoluble after standing
Paint slag be separated by filtration with mixed solvent, obtained filtrate 1 is obtained based on alkyd resin after using charcoal absorption, vacuum distillation
Recovery naval stores 52g.
(3) toward addition 250mL dimethylbenzene (solvent 2) in filter residue, stirred 8 hours at 37 DEG C of constant temperature, will be insoluble after standing
Paint slag separated with solvent filter, obtained filtrate 2 use is obtained after charcoal absorption, vacuum distillation based on epoxy resin return
Receive naval stores 17g.
(4) mixed solvent (solvent 3) (volume ratio 50 of addition 150mL dimethylbenzene and butanone into filter residue is continued：50), room
Stir 8 hours, separate undissolved paint slag with solvent filter after standing, obtained filtrate 3 uses charcoal absorption at 25 DEG C of temperature,
The recovery naval stores 23g. based on acrylic resin is obtained after vacuum distillation
(5) mixed solvent (solvent 4) (volume ratio 50 of addition 150mL dimethylbenzene and phenmethylol into filter residue is continued：50),
Stir 12 hours, separate undissolved paint slag with solvent filter after standing, obtained filtrate 4 is inhaled with activated carbon at 50 DEG C of constant temperature
It is attached, the recovery naval stores 3g based on amino resins is obtained after vacuum distillation, and reclaim the solid residue 2g of slightly solubility.
Specific embodiment listed above is the explanation carried out to the present invention, it should be pointed out that above-described embodiment can only
For the invention will be further described, protection scope of the present invention is not represented, other people make according to the prompting of the present invention
Nonessential modification and adjustment, still fall within protection scope of the present invention.
Claims (1)
1. a kind of classified reclaiming method for mixing various kinds of resin in discarded paint, it is characterised in that comprise the following steps：
(1) paint slag must be dehydrated by being dehydrated after mixed paint slag is screened；The mixed solvent of gasoline and dimethylbenzene is added into dehydration paint slag,
Stirring and dissolving, then stands, filters to obtain the first solid phase and the first liquid phase, the first liquid phase through absorption, vacuum distillation handle first
Reclaim resin；The volume composition of the step in the mixed solvent dimethylbenzene is 40%；
(2) xylene solvent is added into the first solid phase, then stirring and dissolving stands, filters to obtain second solid phase and second liquid phase,
Second liquid phase handles to obtain the second recovery resin through absorption, vacuum distillation；
(3) mixed solvent of dimethylbenzene and ketone is added into second solid phase, then stirring and dissolving stands, filters to obtain the 3rd solid phase
With the 3rd liquid phase, the 3rd liquid phase handles to obtain the 3rd recovery resin through absorption, vacuum distillation；The ketone of the step in the mixed solvent is fourth
At least one of ketone, acetone and cyclohexanone, the volume composition of in the mixed solvent ketone is 10-90%；
(4) add the mixed solvent of dimethylbenzene and phenmethylol into the 3rd solid phase, stirring and dissolving, then stand, filter the 4th
Solid phase and the 4th liquid phase, the 4th liquid phase handle to obtain the 4th recovery resin through absorption, vacuum distillation；The step in the mixed solvent benzene first
The volume composition of alcohol is 10-90%；
Stirring and dissolving process in step (1)~(4) is carried out under 25-50 DEG C of constant temperature, and mixing time is 5-12 hours；
The volume mass ratio that the addition of the mixed solvent of gasoline and dimethylbenzene paints slag with dehydration in step (1) is 1.5-4mL：
1g；
The mass volume ratio that the addition of xylene solvent paints slag with dehydration in step (2) is 1.5-4mL：1g；
The mass volume ratio that the addition of the mixed solvent of dimethylbenzene and ketone paints slag with dehydration in step (3) is 1.5-2mL：1g；
The mass volume ratio that the addition of the mixed solvent of dimethylbenzene and phenmethylol paints slag with dehydration in step (4) is 1.5-2mL：
1g。
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| CN201510308638.6A CN104910671B (en) | 2015-06-05 | 2015-06-05 | The classified reclaiming method of various kinds of resin in the discarded paint of mixing |
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| CN104910671B true CN104910671B (en) | 2017-09-01 |
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| CN106216351B (en) * | 2016-07-22 | 2018-10-19 | 金华市海日家居用品有限公司 | A kind of integrated conduct method of danger solid waste |
| CN110041559A (en) * | 2018-01-17 | 2019-07-23 | 昆山瑞正金属制品有限公司 | A kind of resin efficient recycling method |
| CN112169462A (en) * | 2020-10-14 | 2021-01-05 | 大连海事大学 | Dry paint mist collecting and utilizing device |
| CN113500084A (en) * | 2021-07-22 | 2021-10-15 | 天津市瑞德赛恩水业有限公司 | Paint slag reduction process |
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| CN103254702A (en) * | 2013-04-22 | 2013-08-21 | 佛山市伊思曼化工有限公司 | Technology for recycling waste residues of PVDF (Polyvinylidene Fluoride) perfluorocarbon paint |
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| US5223141A (en) * | 1992-07-27 | 1993-06-29 | Chemfil Corporation | Method for removing and recovering paint overspray in a water wash spray booth |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103254702A (en) * | 2013-04-22 | 2013-08-21 | 佛山市伊思曼化工有限公司 | Technology for recycling waste residues of PVDF (Polyvinylidene Fluoride) perfluorocarbon paint |
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