CN108659260A - A kind of recovery process of polyvinyl chloride wastes - Google Patents
A kind of recovery process of polyvinyl chloride wastes Download PDFInfo
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- CN108659260A CN108659260A CN201810369265.7A CN201810369265A CN108659260A CN 108659260 A CN108659260 A CN 108659260A CN 201810369265 A CN201810369265 A CN 201810369265A CN 108659260 A CN108659260 A CN 108659260A
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- polyvinyl chloride
- recovery process
- wastes
- waste
- organic solvent
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- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 100
- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 100
- 239000002699 waste material Substances 0.000 title claims abstract description 77
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 230000001954 sterilising effect Effects 0.000 claims abstract 2
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract 2
- 239000003960 organic solvent Substances 0.000 claims description 42
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 29
- 239000000706 filtrate Substances 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 239000013049 sediment Substances 0.000 claims description 14
- 239000003463 adsorbent Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 6
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims 1
- 229920001596 poly (chlorostyrenes) Polymers 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 8
- 238000005119 centrifugation Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- OXHNLMTVIGZXSG-UHFFFAOYSA-N 1-Methylpyrrole Chemical class CN1C=CC=C1 OXHNLMTVIGZXSG-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention relates to a kind of recovery process of polyvinyl chloride wastes, include the following steps：(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet sterilization；(2) the broken of polyvinyl chloride wastes, dissolving, precipitation.The beneficial effects of the invention are as follows：Solve the problems, such as that recovery process complexity, high energy consumption, added value of product are low in the prior art, by the way that a kind of technological process of rational parameter setting offer is simple, low energy consumption, solvent-oil ratio is small, the recovery process of the high polyvinyl chloride wastes of properties of product.
Description
Technical field
The present invention relates to resource recycling fields, are specifically related to a kind of recovery process of polyvinyl chloride wastes.
Background technology
Currently, China recycles polyvinyl chloride wastes the method and physics side that main method is chemical degradation
Method, chemical method refer to that degradation reaction occurs for macromolecule under the action of thermally and chemically reagent, form the product of low molecular weight, produce
Object can be utilized further, and if monomer can polymerize again, oil product can carry out deep processing, but chemical method needs high temperature and pressure, causes to consume
Energy is high, condition is harsh, and height is required to equipment material, can be to realize large-scale operation.Physical method is by cut-out, crushing, adds
The recycle utilization that the processes such as heat fusing reprocess waste plastic, but the performance ratio new material of various regenerated plastics is big
To reduce, and contain a large amount of impurities.
Invention content
The technical problem to be solved by the present invention is to the complexity of plastics recycling process in the prior art, high energy consumption, product is additional
It is worth low problem.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of recovery process of polyvinyl chloride wastes, packet
Include following steps：
(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet light kills
Bacterium；
(2) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the useless of 0.1-5mm to crush and obtain grain size
Old polyvinyl chloride particles；
(3) at 50-80 DEG C, the waste polyvinyl chloride particle is put into the closed container equipped with the first organic solvent
In and stir 5-15min, so that the waste polyvinyl chloride particle is quickly dissolved, formed homogeneous phase solution；
(4) adsorbent is added in above-mentioned solution, stands a moment formation and stands liquid, is by standing liquid addition hole
It is filtered in the first filter of 400-500 mesh, obtains a filter residue and first-time filtrate；
(5) under 45-60 DEG C, normal pressure, by the first-time filtrate obtained in step (4) under stirring, it is added the
Polyvinyl chloride powdery object is precipitated in two organic solvents, and initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent
Solution；
(6) by the dirty solution of step (5) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge obtains centrifugation filter
Liquid and sediment；Sediment washing it is dry polyvinyl chloride powder.
The beneficial effects of the invention are as follows：Solve that recovery process complexity, high energy consumption, added value of product are low in the prior art asks
Topic, by the way that a kind of technological process of rational parameter setting offer is simple, low energy consumption, solvent-oil ratio is small, properties of product are high to gather
The recovery process of vinyl chloride waste.
Based on the above technical solution, the present invention can also be improved as follows：
Further, the step (5) further includes the solvent solution for obtaining the step (5), at 75-85 DEG C
At a temperature of, carry out the step of air-distillation is separated and recovered from the second organic solvent and the first organic solvent.
Further, the recovery process of the waste polyvinyl chloride material further includes step (7), the step (7) be to
First organic solvent, and repeating said steps (2) the extremely step are added in the centrifugal filtrate that the step (6) obtains
(6), the step of secondary crystallization recycling is carried out.
Further, first organic solvent is N-Methyl pyrrolidone, the waste polyvinyl chloride particle and the N-
The weight ratio of methyl pyrrolidone is 1：6-1：9.
Further, the weight ratio of the waste polyvinyl chloride particle and the N-Methyl pyrrolidone is 1：8.
Further, the hole of the first filter is 450 mesh.
Further, second organic solvent is methanol, the body of the addition of the methanol and first organic solvent
Product is than being 1：1-1：4.
Further, the adsorbent is one kind in activated carbon, activated alumina, absorption resin.
Specific implementation mode
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
Embodiment 1
A kind of recovery process of polyvinyl chloride wastes of the present invention, includes the following steps：
(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet light kills
Bacterium；
(2) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the waste and old of 0.1mm to crush and obtain grain size
Polyvinyl chloride particles；
(3) at 50 DEG C, the waste polyvinyl chloride particle is put into the closed container equipped with the first organic solvent
And 5min is stirred, so that the waste polyvinyl chloride particle is quickly dissolved, forms homogeneous phase solution；
(4) adsorbent is added in above-mentioned solution, stands a moment formation and stands liquid, is by standing liquid addition hole
It is filtered in the first filter of 400 mesh, obtains a filter residue and first-time filtrate；
(5) under 45 DEG C, normal pressure, by the first-time filtrate obtained in step (4) under stirring, being added second has
Polyvinyl chloride powdery object is precipitated in solvent, and initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent solution；
(6) by the dirty solution of step (5) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge obtains centrifugation filter
Liquid and sediment；Sediment washing it is dry polyvinyl chloride powder.
Further, the step (5) further includes the solvent solution for obtaining the step (5), in 75 DEG C of temperature
Under, carry out the step of air-distillation is separated and recovered from the second organic solvent and the first organic solvent.
The recovery process of the waste polyvinyl chloride material further includes step (7), and the step (7) is to the step
(6) first organic solvent is added in the centrifugal filtrate obtained, and repeating said steps (2) carry out two to the step (6)
The step of secondary crystallization recycling.
First organic solvent is N-Methyl pyrrolidone, the waste polyvinyl chloride particle and the N- methylpyrroles
The weight ratio of alkanone is 1：6.
Second organic solvent is methanol, and the volume ratio of the addition of the methanol and first organic solvent is 1：
1。
The adsorbent is activated carbon.
Embodiment 2
A kind of recovery process of polyvinyl chloride wastes of the present invention, includes the following steps：
(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet light kills
Bacterium；
(2) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the waste and old poly- of 5mm to crush and obtain grain size
Vinyl chloride particle；
(3) at 80 DEG C, the waste polyvinyl chloride particle is put into the closed container equipped with the first organic solvent
And 15min is stirred, so that the waste polyvinyl chloride particle is quickly dissolved, forms homogeneous phase solution；
(4) adsorbent is added in above-mentioned solution, stands a moment formation and stands liquid, is by standing liquid addition hole
It is filtered in the first filter of 500 mesh, obtains a filter residue and first-time filtrate；
(5) under 60 DEG C, normal pressure, by the first-time filtrate obtained in step (4) under stirring, being added second has
Polyvinyl chloride powdery object is precipitated in solvent, and initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent solution；
(6) by the dirty solution of step (5) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge obtains centrifugation filter
Liquid and sediment；Sediment washing it is dry polyvinyl chloride powder.
The step (5) further includes the solvent solution for obtaining the step (5), at a temperature of 85 DEG C, is carried out
Air-distillation is separated and recovered from the step of the second organic solvent and the first organic solvent.
The recovery process of the waste polyvinyl chloride material further includes step (7), and the step (7) is to the step
(6) first organic solvent is added in the centrifugal filtrate obtained, and repeating said steps (2) carry out two to the step (6)
The step of secondary crystallization recycling.
First organic solvent is N-Methyl pyrrolidone, the waste polyvinyl chloride particle and the N- methylpyrroles
The weight ratio of alkanone is 1：9.
Second organic solvent is methanol, and the volume ratio of the addition of the methanol and first organic solvent is 1：
4。
The adsorbent is activated alumina.
Embodiment 3
A kind of recovery process of polyvinyl chloride wastes of the present invention, includes the following steps：
(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet light kills
Bacterium；
(2) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the waste and old poly- of 1mm to crush and obtain grain size
Vinyl chloride particle；
(3) at 70 DEG C, the waste polyvinyl chloride particle is put into the closed container equipped with the first organic solvent
And 8min is stirred, so that the waste polyvinyl chloride particle is quickly dissolved, forms homogeneous phase solution；
(4) adsorbent is added in above-mentioned solution, stands a moment formation and stands liquid, is by standing liquid addition hole
It is filtered in the first filter of 450 mesh, obtains a filter residue and first-time filtrate；
(5) under 50 DEG C, normal pressure, by the first-time filtrate obtained in step (4) under stirring, being added second has
Polyvinyl chloride powdery object is precipitated in solvent, and initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent solution；
(6) by the dirty solution of step (5) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge obtains centrifugation filter
Liquid and sediment；Sediment washing it is dry polyvinyl chloride powder.
The step (5) further includes the solvent solution for obtaining the step (5), at a temperature of 78 DEG C, is carried out
Air-distillation is separated and recovered from the step of the second organic solvent and the first organic solvent.
The recovery process of the waste polyvinyl chloride material further includes step (7), and the step (7) is to the step
(6) first organic solvent is added in the centrifugal filtrate obtained, and repeating said steps (2) carry out two to the step (6)
The step of secondary crystallization recycling.
First organic solvent is N-Methyl pyrrolidone, the waste polyvinyl chloride particle and the N- methylpyrroles
The weight ratio of alkanone is 1：8.
Second organic solvent is methanol, and the volume ratio of the addition of the methanol and first organic solvent is 1：
2。
The adsorbent is in absorption resin.
Embodiment 4
A kind of recovery process of polyvinyl chloride wastes of the present invention, includes the following steps：
(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet light kills
Bacterium；
(2) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the waste and old poly- of 2mm to crush and obtain grain size
Vinyl chloride particle；
(3) at 60 DEG C, the waste polyvinyl chloride particle is put into the closed container equipped with the first organic solvent
And 12min is stirred, so that the waste polyvinyl chloride particle is quickly dissolved, forms homogeneous phase solution；
(4) adsorbent is added in above-mentioned solution, stands a moment formation and stands liquid, is by standing liquid addition hole
It is filtered in the first filter of 450 mesh, obtains a filter residue and first-time filtrate；
(5) under 55 DEG C, normal pressure, by the first-time filtrate obtained in step (4) under stirring, being added second has
Polyvinyl chloride powdery object is precipitated in solvent, and initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent solution；
(6) by the dirty solution of step (5) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge obtains centrifugation filter
Liquid and sediment；Sediment washing it is dry polyvinyl chloride powder.
The step (5) further includes the solvent solution for obtaining the step (5), at a temperature of 82 DEG C, is carried out
Air-distillation is separated and recovered from the step of the second organic solvent and the first organic solvent.
The recovery process of the waste polyvinyl chloride material further includes step (7), and the step (7) is to the step
(6) first organic solvent is added in the centrifugal filtrate obtained, and repeating said steps (2) carry out two to the step (6)
The step of secondary crystallization recycling.
First organic solvent is N-Methyl pyrrolidone, the waste polyvinyl chloride particle and the N- methylpyrroles
The weight ratio of alkanone is 1：7.
Second organic solvent is methanol, and the addition of the methanol and the volume ratio of first organic solvent are 1:
3。
The adsorbent is activated carbon.
Comparative example 1
A kind of recovery process of polyvinyl chloride wastes, includes the following steps：
(1) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the useless of 10-20mm to crush and obtain grain size
Old polyvinyl chloride particles；
(2) the waste polyvinyl chloride particle is put into the closed container equipped with N-Methyl pyrrolidone and stirs 5-
15min makes the waste polyvinyl chloride particle quickly dissolve, and forms homogeneous phase solution；
(3) by after above-mentioned homogeneous filtrate filtering, methanol is added while stirring in filtrate, Polyvinyl chloride powdery object is precipitated,
And initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent solution；
(4) by the dirty solution of step (3) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge obtains centrifugation filter
Liquid and sediment；Sediment washing it is dry polyvinyl chloride powder.
The character of product and yield are as shown in Table 1 in above-described embodiment 1-4 and comparative example 1：
Table one：The character and yield of product in above-described embodiment 1-4 and comparative example 1
| Character | Yield % | |
| Embodiment 1 | White powder | 83 |
| Embodiment 2 | White powder | 82 |
| Embodiment 3 | White powder | 85 |
| Embodiment 4 | White powder | 79 |
| Comparative example 1 | Grey powder | 46 |
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of recovery process of polyvinyl chloride wastes, which is characterized in that include the following steps：
(1) pretreatment of polyvinyl chloride wastes：Polyvinyl chloride wastes are subjected to surface spraying cleaning and ultraviolet sterilization；
(2) the waste polyvinyl chloride material being collected into is added in pulverizer, it is the waste and old poly- of 0.1-5mm to crush and obtain grain size
Vinyl chloride particle；
(3) at 50-80 DEG C, the waste polyvinyl chloride particle is put into the closed container equipped with the first organic solvent simultaneously
5-15min is stirred, the waste polyvinyl chloride particle is made quickly to dissolve, forms homogeneous phase solution；
(4) adsorbent is added in above-mentioned solution, stands a moment formation and stands liquid, it is 400- that hole, which is added, in the standing liquid
It is filtered in the first filter of 500 mesh, obtains a filter residue and first-time filtrate；
(5) under 45-60 DEG C, normal pressure, by the first-time filtrate obtained in step (4) under stirring, being added second has
Polyvinyl chloride powdery object is precipitated in solvent, and initial gross separation obtains the dirty solution containing Polyvinyl chloride powdery object and solvent solution；
(6) by the dirty solution of step (5) containing Polyvinyl chloride powdery object, the centrifugal dewatering in centrifuge, obtain centrifugal filtrate and
Sediment；Sediment washing it is dry polyvinyl chloride powder.
2. the recovery process of polyvinyl chloride wastes according to claim 1, which is characterized in that the step (5) is also wrapped
It includes, the solvent solution that the step (5) is obtained, at a temperature of 75-85 DEG C, carries out air-distillation and be separated and recovered from the
The step of two organic solvents and the first organic solvent.
3. the recovery process of polyvinyl chloride wastes according to claim 2, which is characterized in that the waste and old polychlorostyrene second
The recovery process of alkene material further includes step (7), and the step (7) is to be added in the centrifugal filtrate obtained to the step (6)
The step of first organic solvent, and repeating said steps (2) the extremely step (6), progress secondary crystallization recycling.
4. according to the recovery process of any polyvinyl chloride wastes of claim 1-3, which is characterized in that described first has
Solvent is N-Methyl pyrrolidone, and the weight ratio of the waste polyvinyl chloride particle and the N-Methyl pyrrolidone is 1：6-
1：9.
5. the recovery process of polyvinyl chloride wastes according to claim 4, which is characterized in that the waste polyvinyl chloride
The weight ratio of particle and the N-Methyl pyrrolidone is 1：8.
6. according to the recovery process of any polyvinyl chloride wastes of claim 1-3 or 5, which is characterized in that described the
The hole of one filter is 450 mesh.
7. according to the recovery process of any polyvinyl chloride wastes of claim 1-3 or 5, which is characterized in that described the
Two organic solvents are methanol, and the volume ratio of the addition of the methanol and first organic solvent is 1：1-1：4.
8. according to the recovery process of any polyvinyl chloride wastes of claim 1-7, which is characterized in that the adsorbent
For one kind in activated carbon, activated alumina, absorption resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369265.7A CN108659260A (en) | 2018-04-23 | 2018-04-23 | A kind of recovery process of polyvinyl chloride wastes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369265.7A CN108659260A (en) | 2018-04-23 | 2018-04-23 | A kind of recovery process of polyvinyl chloride wastes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108659260A true CN108659260A (en) | 2018-10-16 |
Family
ID=63780868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810369265.7A Withdrawn CN108659260A (en) | 2018-04-23 | 2018-04-23 | A kind of recovery process of polyvinyl chloride wastes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108659260A (en) |
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2018
- 2018-04-23 CN CN201810369265.7A patent/CN108659260A/en not_active Withdrawn
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