System and method for separating co-polypropylene and homo-polypropylene from waste plastics

Abstract

The invention relates to a system and a method for separating co-polypropylene and homo-polypropylene from waste plastics, and belongs to the technical field of solid waste recovery and separation. The system provided by the invention comprises a size reduction module, a pre-sorting module, an identification module and a separation module, the method provided by the invention comprises the following steps: reducing the size of the waste plastic through a size reducing module, then carrying out color and material sorting to obtain sheet-shaped polypropylene plastic, finally marking and distinguishing homopolymerized polypropylene and copolymerized polypropylene through a feature recognition module, and separating through a separation module to respectively obtain a copolymerized polypropylene material and a homopolymerized polypropylene material. According to the method, the molecular structure of polypropylene does not need to be damaged, chemical reagents do not need to be added or chemical reactions do not need to be conducted, secondary pollution is avoided, energy consumption is extremely low, the two materials obtained through separation can achieve high-value application in different fields, and the problem that in the conventional waste plastic recycling process, due to the fact that effective grading cannot be achieved, only degradation utilization can be achieved is solved.

Description

Technical Field

[0001] The invention relates to the technical field of solid waste recovery and sorting, and in particular to a system and method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics. Background Art

[0002] Due to the tense global economic and competitive trends, the export of clothing chemical fiber products downstream of the high-carbon petrochemical industry has been blocked, and the development of the industry has been greatly restricted. The recycling of post-consumer plastics can greatly reduce carbon emissions. On this basis, the development of recycled polyester fiber (PET, actual use rate 7.8%) has solved this problem to a certain extent; however, the recycled polypropylene fiber (PP, actual use rate 19%), which has a larger application volume and is more suitable for the clothing industry, has not formed a large-scale industrial chain. At present, the recycling and reuse technology of polypropylene is relatively single. The main way is to blend waste polypropylene with new materials or other materials to make woven bags, composite floors and low-end daily plastic products. However, the added value of these products is generally low and cannot form a scale effect. In addition, waste polypropylene materials can only be used for one-time reuse. After downgrading and recycling, they become shorter molecular chains, which are easy to form pollutants such as microplastics, increasing the pressure of subsequent environmental pollutant treatment.

[0003] The main reason for limiting the reuse of polypropylene is that polypropylene materials have two different monomers, copolymerization and homopolymerization, in the manufacturing process, and various modified materials are added to achieve the target performance effect. However, in the physical recycling process, due to the limitations of sorting technology, the polypropylene materials obtained by these manufacturing methods cannot be effectively distinguished, which leads to the limitation of its subsequent reuse. The chemical recycling process uses a large amount of reagents, resulting in the release of wastewater and waste gas, while generating a large amount of energy consumption and carbon emissions, which burdens the environment. Therefore, grading polypropylene materials, especially distinguishing between copolymer and homopolymer polypropylene materials, is a demand for secondary resource utilization and a trend of environmental protection.

[0004] Currently, the existing technology lacks methods and equipment that can efficiently identify and separate copolymerized polypropylene and homopolymerized polypropylene. Therefore, developing a system and method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics will fill this technical gap and solve the problem that waste plastics can only be downgraded due to the inability to effectively grade them during conventional recycling processes, which has great practical significance. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a system and method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics. The system and method provided by the present invention can achieve lossless separation and recovery of copolymerized polypropylene and homopolymerized polypropylene from waste plastics, and realize high-value applications in different fields.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention provides a method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics, comprising the following steps:

[0008] S1. Size reduction: The waste plastics are crushed in two stages to reduce the size, and a mixed plastic sheet is obtained; the waste plastics are daily miscellaneous plastics recycled within 30 days after being scrapped;

[0009] S2. Pre-sorting: The mixed plastic flakes are sorted by color and material to obtain polypropylene plastic flakes; the color sorting is to remove black and colored debris;

[0010] S3. Identification: The flaky polypropylene plastic is analyzed by infrared spectroscopy, wherein 1225-1275cm -1 The absorption peak intensity is u 1 , 1375-1400cm -1 The absorption peak intensity is u 2 , mark u 1 >0.3u 2 The flaky polypropylene plastics are copolymerized polypropylene; the other unmarked flaky polypropylene plastics are homopolymerized polypropylene;

[0011] S4. Separation: Through the marking sorting, the copolymerized polypropylene and homopolymerized polypropylene in the waste plastic are separated.

[0012] The method of the present invention is mainly aimed at waste plastics containing polypropylene recovered from daily groceries, including lunch boxes, milk tea cups, beverage bottles, buckets, etc., but does not include engineering plastics such as automobile plastics, electrical appliances and chemical barrels; the method of the present invention is used for separation, and the waste plastics need to be recycled and processed within 30 days after they are scrapped; after the waste plastics are scrapped for more than 30 days, polypropylene will decompose during the recycling process, which seriously affects the separation effect of the method.

[0013] The present invention first reduces the waste plastics to a size that is easy to identify and a uniform flake shape through a two-stage crushing process, and the two-stage crushing can reduce the generation of polypropylene powder and reduce loss and waste; then, through conventional color and material sorting means, the black and colored materials are first removed for subsequent sorting, and then the materials other than polypropylene materials are further removed to obtain flake polypropylene plastics.

[0014] For the processed flaky polypropylene plastics, the separation of copolymer polypropylene and homopolymer polypropylene is mainly achieved by infrared spectral recognition: using infrared recognition cameras and other equipment to collect spectral image analysis, identifying homopolymer polypropylene and copolymer polypropylene through their distinguishing features, and then marking the copolymer polypropylene with identification colors; finally, the unmarked homopolymer polypropylene material and the marked copolymer polypropylene material are separated through the final separation operation. In the recognition step, the wave number range of the collected infrared spectrum is 1225-1275cm -1 The absorption peak intensity is u 1 , at 1375-1400cm -1 The absorption peak intensity is u 2 , in accordance with u 1 >0.3u 2 The characteristic polypropylene plastic is marked as copolymer polypropylene, and the rest are homopolypropylene. This identification feature can accurately sort out copolymer polypropylene materials and homopolypropylene materials; if the characteristic standard is changed, some homopolymer and copolymer polypropylenes cannot be separated after sorting, and maximum recycling cannot be achieved.

[0015] The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics provided by the present invention has a simple operation process, does not need to destroy the molecular structure of the polypropylene itself, and does not need to add chemical reagents, thereby avoiding secondary pollution; and the whole process of the present invention is a physical process, and the energy consumption for separation is extremely low; the homopolymerized polypropylene material and the copolymerized polypropylene material separated by the present invention can be recycled and used respectively, realizing high-value applications in different fields, and solving the problem that waste plastics can only be downgraded and utilized in the conventional recycling process because they cannot be effectively classified.

[0016] Preferably, in S1, the waste plastics are pretreated and then crushed in two stages to obtain flaky mixed plastics; the pretreatment includes manual sorting, magnetic separation, and eddy current sorting.

[0017] For waste plastics containing glass glue, seriously dirty materials, chemical barrels, pipes, metal-containing materials, etc., they need to be pre-treated by the above means to remove impurities.

[0018] Preferably, in said S1, the two-stage crushing is shredding and crushing.

[0019] Further preferably, the shredding is performed by using a double-shaft shredder, and the crushing is performed by using a shearing crusher.

[0020] The amount of polypropylene powder obtained by crushing with other means (such as hammer crushing or single-stage crushing) is 5wt%. The above means can reduce the generation of powder and control the generation of polypropylene powder to 2wt%, which can increase the sorting efficiency and reduce material loss.

[0021] Preferably, in said S1, the particle size of the flaky mixed plastic is 8-20 mm.

[0022] Preferably, in S2, the mixed plastic flakes are rinsed with water, dehydrated, and then color sorted and material sorted. The mixed plastic flakes are rinsed with water to remove impurities such as floating powder, and plastic with a density less than 1 can be obtained.

[0023] Preferably, in S2, the material sorting method is to use near-infrared spectroscopy detection.

[0024] Preferably, in S2, the color of the sheet-like polypropylene plastic includes transparent, white, milky white, and grayish white.

[0025] Preferably, in S3, the scanning range of infrared spectroscopy analysis is 1000-1500cm -1 Further preferably, the infrared identification band in the wavelength range is realized by a beam splitter prism.

[0026] Preferably, in S4, copolymerized polypropylene and homopolymerized polypropylene are separated by striking the marked sheet-like polypropylene plastic or the unmarked sheet-like polypropylene plastic.

[0027] Further preferably, when the content of the marked polypropylene flake plastic (i.e. copolymerized polypropylene) is less than 40%, a pneumatic device is used to hit the marked polypropylene flake plastic to achieve separation; when the content of the marked polypropylene flake plastic is greater than 60%, a pneumatic device is used to hit the unmarked polypropylene flake plastic (i.e. homopolymerized polypropylene) to achieve separation. The content of the marked polypropylene flake plastic is: the ratio of the number of marked materials with identification color to the total number of materials identified by the machine.

[0028] If the content of the marked flaky polypropylene plastic is higher than 60%, but it is still separated by hitting the marked flaky polypropylene plastic, then the unmarked flaky polypropylene plastic obtained after separation may be homopolypropylene mixed with a large amount of copolymerized polypropylene. In this case, it is necessary to repeat the identification and separation steps in S3 and S4 for further sorting.

[0029] In a second aspect, the present invention provides copolymer polypropylene material and homopolypropylene material separated by the above method for separating copolymer polypropylene and homopolypropylene from waste plastics.

[0030] In a third aspect, the present invention provides a system for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics, characterized in that it comprises a size reduction module, a pre-sorting module, an identification module and a separation module; the system for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics is operated using the above-mentioned method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics.

[0031] The system for separating copolymer polypropylene and homopolypropylene from waste plastics provided by the present invention comprises the following steps: the waste plastics are crushed in two stages by a size reduction module to obtain flaky mixed plastics; miscellaneous plastics and other plastics are removed by a pre-sorting module to obtain flaky polypropylene plastics; the copolymer polypropylene material and the homopolypropylene material are distinguished and marked by an identification module; and the copolymer polypropylene material and the homopolypropylene material in the waste plastics are separated by a separation module.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The method for separating copolymer polypropylene and homopolypropylene from waste plastics provided by the present invention achieves rapid and accurate separation and recovery to obtain copolymer polypropylene materials and homopolypropylene materials mainly through size reduction, pre-sorting, infrared identification and separation steps. The method provided by the present invention is simple and does not need to destroy the molecular structure of polypropylene itself; at the same time, no chemical reagents need to be added, thus avoiding secondary pollution; and the whole process is a physical process, with extremely low energy consumption for sorting; the homopolypropylene materials and copolymer polypropylene materials separated by the present invention can be used in high-value applications in different fields. The present invention solves the problem of resource value loss caused by the downgrading of polypropylene waste plastics, reduces the increased environmental burden caused by chemical recycling, and maximizes the value of polypropylene materials, thus having extremely high application value in the field of solid waste recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a system module for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to the present invention;

[0035] Figure 2 The infrared spectrum comparison diagram of two kinds of polypropylene separated by the method of separating copolymer polypropylene and homopolymer polypropylene from waste plastics of the present invention. DETAILED DESCRIPTION

[0036] In order to better illustrate the purpose, technical scheme and advantages of the present invention, the present invention will be further described below in conjunction with specific examples. The test methods used in the following examples are conventional methods unless otherwise specified; the materials and reagents used are reagents and materials that can be obtained from commercial channels unless otherwise specified.

[0037] Example 1

[0038] An embodiment of the system for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics of the present invention is shown in the schematic diagram of its module composition. Figure 1 ;

[0039] The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics using the system described in this embodiment is as follows:

[0040] S1. Size reduction module: compress the daily miscellaneous waste plastics recovered within 30 days after scrapping (the source is the sorting center, garbage packaging station, etc., the amount of copolymerized polypropylene and homopolymerized polypropylene materials is basically the same), the weight is 1000kg, cut the binding wire on the unpacking machine, and break up the compressed package to obtain dispersed daily miscellaneous mixed waste plastics;

[0041] The sundries (such as glass glue, seriously dirty materials, chemical barrels, pipes, metal-containing materials, etc.) in the above-mentioned daily miscellaneous mixed plastics are removed by manual sorting to obtain mixed waste plastics 1, totaling 950 kg;

[0042] A magnetic separator is used to remove iron-containing components from the mixed plastic 1; an eddy current separator is further used to remove nonferrous metal components therefrom, thereby obtaining a mixed plastic 2, totaling 900 kg;

[0043] The mixed plastic 2 is crushed by a double-shaft shredder to obtain a mixed plastic 3 of a larger size (≤10 cm); the mixed plastic 3 is crushed into 8-20 mm pieces by a pulverizer through shearing to obtain a flake mixed plastic, totaling 891 kg;

[0044] Water was added to cool the mixed plastic 3 during processing in the pulverizer, and powder was taken out while washing the material, a total of 9 kg.

[0045] Belt conveyors are used to transport materials between the above-mentioned equipment.

[0046] S2. Pre-sorting module: The flaky mixed plastic obtained in step S1 is placed in a water tank for rinsing, and after dehydration in a dehydrator, a flaky floating mixed plastic with a density less than 1 is obtained, totaling 800 kg;

[0047] The above-mentioned flake floating mixed plastic is put into the color sorting machine through a vibrating feeder, and the black and colored impurities are removed, and the remaining white, milky white, grayish white, and transparent materials are the mixed plastics of the target color, totaling 600 kg;

[0048] The material is then fed into a material sorting machine through a vibrating feeder. The material sorting camera is a hyperspectral near-infrared camera, which identifies and removes non-polypropylene plastics to obtain 400 kg of flake polypropylene plastics.

[0049] S3. Identification module: The flake polypropylene waste plastic obtained in S2 is evenly distributed on a conveyor belt with a pure black background through a vibrating feeder to ensure that there is no material obstruction, and the material passes through a wave number of 1500-1000cm -1 The infrared recognition camera is used to obtain its spectral image and the algorithm is used to identify the wave number 1275-1225cm -1 The absorption peak intensity is u 1 , 1375-1400cm-1 The absorption peak intensity is u 2 , will identify u 1 >0.3u 2 The plastic is marked in yellow;

[0050] S4, separation module: using a pneumatic device, the material marked in yellow is sorted out by beating, so as to separate copolymer and homopolymer polypropylene plastics. The material marked in yellow is copolymer polypropylene material, and a total of 200 kg of copolymer polypropylene material is obtained, and the remaining 200 kg is homopolymer polypropylene material.

[0051] Among them, the infrared spectrum comparison diagram of homopolymer polypropylene material and copolymer polypropylene material is as follows Figure 2 shown.

[0052] Example 2

[0053] An embodiment of the system for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics of the present invention, the method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics using the system of this embodiment is as follows:

[0054] S1. Size reduction module: compress the daily miscellaneous waste plastics recovered within 30 days after scrapping (the source is the sorting center, garbage packaging station, etc., the amount of copolymerized polypropylene material is 2-4 times that of homopolymerized polypropylene material), the weight is 1000kg, cut off the binding wire on the unpacking machine, and break up the compressed package to obtain dispersed daily miscellaneous mixed waste plastics;

[0055] The sundries (such as glass glue, seriously dirty materials, chemical barrels, pipes, metal-containing materials, etc.) in the above-mentioned daily miscellaneous mixed plastics were removed by manual sorting to obtain mixed waste plastics 1, totaling 970 kg;

[0056] A magnetic separator is used to remove iron-containing components from the mixed plastic 1; an eddy current separator is further used to remove nonferrous metal components therefrom, thereby obtaining a mixed plastic 2, totaling 920 kg;

[0057] The mixed plastic 2 is crushed by a double-shaft shredder to obtain a mixed plastic 3 of a larger size (≤10 cm); the mixed plastic 3 is crushed into 8-20 mm by a pulverizer through shearing to obtain a flake mixed plastic, a total of 910 kg;

[0058] Water was added to cool the mixed plastic 3 during processing in the pulverizer, and powder was taken out while washing the material, a total of 10 kg.

[0059] Belt conveyors are used to transport materials between the above-mentioned equipment.

[0060] S2. Pre-sorting module: The flaky mixed plastic obtained in step S1 is placed in a water tank for rinsing, and after dehydration in a dehydrator, a flaky floating mixed plastic with a density less than 1 is obtained, totaling 820 kg;

[0061] The above-mentioned flake floating mixed plastic is fed into a color sorter through a vibrating feeder, and black and colored impurities are removed, and the remaining white, milky white, grayish white, and transparent materials are mixed plastics of the target color, totaling 650 kg;

[0062] The material is then fed into a material sorting machine through a vibrating feeder. The material sorting camera is a hyperspectral near-infrared camera, which identifies and removes non-polypropylene plastics to obtain 400 kg of flake polypropylene plastics.

[0063] S3. Identification module: The flake polypropylene waste plastic obtained in S2 is evenly distributed on a conveyor belt with a pure black background through a vibrating feeder to ensure that there is no material obstruction, and the material passes through a wave number of 1500-1000cm -1 The infrared recognition camera is used to obtain its spectral image and the algorithm is used to identify the wave number 1275-1225cm -1 The absorption peak intensity is u 1 , 1375-1400cm -1 The absorption peak intensity is u 2 , will identify u 1 >0.3u 2 The plastic is marked in yellow;

[0064] S4. Separation module: using a pneumatic device, the material marked in yellow is separated by beating, so as to separate the copolymer and homopolymer polypropylene plastics. The material marked in yellow is copolymer polypropylene material, totaling 250kg, and the remaining 150kg is a mixture of homopolymer polypropylene and copolymer polypropylene;

[0065] Repeat steps S3 and S4 once with the above 150 kg of the material mixed with homopolypropylene and copolymer polypropylene to obtain 50 kg of copolymer polypropylene material and 100 kg of homopolypropylene material;

[0066] A total of 300 kg of copolymerized polypropylene material and 100 kg of homopolymerized polypropylene material were obtained by separation.

[0067] Comparative Example 1

[0068] The processing object of Comparative Example 1 is waste plastics collected from compressed bags of daily miscellaneous waste plastics 50 days after being scrapped. It is processed using the same system and method as in Example 1. In steps S3 and S4, homopolypropylene and copolymer polypropylene materials cannot be effectively identified and sorted, and 400 kg of polypropylene mixture is obtained, and it is impossible to separate copolymer polypropylene and homopolypropylene from waste plastics.

[0069] Comparative Example 2

[0070] The separation method of Comparative Example 2 is different from that of Example 1 only in that, in step S2, no color sorting operation is performed, and S2 and S3 cannot be effectively identified and sorted subsequently, resulting in a mixed material plastic, and it is impossible to separate copolymer polypropylene and homopolypropylene from waste plastics.

[0071] Comparative Example 3

[0072] The separation method of Comparative Example 3 is different from that of Example 1 only in that, in step S2, no material sorting operation is performed, and a plastic of mixed material is obtained, and it is impossible to separate copolymer polypropylene and homopolypropylene from the waste plastic.

[0073] Comparative Example 4

[0074] The separation method of Comparative Example 4 is different from that of Example 1 only in that in step S3, u 1 >0.2u 2 The plastic is marked in yellow, and the marked 260 kg material is a polypropylene mixture, and the remaining 140 kg is a homopolymer polypropylene material. Repeating steps S3 and S4 on the polypropylene mixture cannot achieve the separation of copolymer polypropylene and homopolymer polypropylene from the waste plastics at the same time.

[0075] Comparative Example 5

[0076] The separation method of Comparative Example 5 is different from that of Example 1 only in that in step S3, u 1 >0.4u 2 The plastic is marked in yellow, and 150 kg of the marked copolymer polypropylene material is obtained, and the remaining 250 kg is a polypropylene mixture. Repeating steps S3 and S4 on the polypropylene mixture cannot achieve the simultaneous separation of copolymer polypropylene and homopolypropylene from the waste plastics.

[0077] Combining the results in the embodiments and comparative examples, it can be seen that:

[0078] In Examples 1 and 2, the system and method for separating copolymer polypropylene and homopolypropylene from waste plastics defined in the present invention are used to process waste plastics that meet the recycling period requirements, which can well achieve separation and separate recovery of copolymer polypropylene materials and homopolypropylene materials from waste plastics, and re-invest them in different production lines for reuse, thereby achieving high-value applications in different fields and solving the problem that waste plastics can only be downgraded due to the inability to effectively classify them in the conventional recycling process.

[0079] From the comparison between comparative examples 1-5 and embodiment 1, it can be seen that each of the treatment and sorting steps defined in the present invention is indispensable; at the same time, combined with Figure 2From the spectrum comparison, it can be seen that in the S3 identification step, the peak intensity u in the infrared spectra of copolymer polypropylene material and homopolymer polypropylene material within a specific wavenumber range is 1 、u 2 The quantitative relationship between them is particularly critical to the accurate separation of the two at the same time.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics, characterized in that: The steps include: S1. Size reduction: The waste plastics are crushed in two stages to reduce the size, and a mixed plastic sheet is obtained; the waste plastics are daily miscellaneous plastics recycled within 30 days after being scrapped; S2. Pre-sorting: The mixed plastic flakes are sorted by color and material to obtain polypropylene plastic flakes; the color sorting is to remove colored and black miscellaneous materials; S3. Identification: The flaky polypropylene plastic is analyzed by infrared spectroscopy, wherein 1225-1275cm -1 The absorption peak intensity is u1, 1375-1400cm -1 The absorption peak intensity is u2, and the flake polypropylene plastics marked with u1>0.3u2 are copolymer polypropylene materials; the other unmarked flake polypropylene plastics are homopolymer polypropylene materials; S4. Separation: Through the marking sorting, the copolymerized polypropylene and homopolymerized polypropylene in the waste plastic are separated.

2. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S1, the waste plastics are pretreated and then crushed in two stages to obtain flaky mixed plastics; the pretreatment includes manual sorting, magnetic separation, and eddy current separation.

3. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S1, the two-stage crushing is shredding and crushing.

4. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S1, the particle size of the flaky mixed plastic is 8-20 mm.

5. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S2, the material sorting method is to use near infrared spectroscopy detection.

6. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S2, the color of the sheet-like polypropylene plastic includes transparent, white, milky white, and grayish white.

7. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S3, the scanning range of infrared spectroscopy analysis is 1000-1500cm -1 .

8. The method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics according to claim 1, characterized in that: In S4, the copolymerized polypropylene and the homopolymerized polypropylene are separated by pneumatically striking the marked sheet-like polypropylene plastic or the unmarked sheet-like polypropylene plastic.

9. The copolymer polypropylene material and the homopolypropylene material separated by the method for separating copolymer polypropylene and homopolypropylene from waste plastics as claimed in any one of claims 1 to 8.

10. A system for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics, characterized in that: It comprises a size reduction module, a pre-sorting module, an identification module and a separation module; the system for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics is operated by the method for separating copolymerized polypropylene and homopolymerized polypropylene from waste plastics as claimed in any one of claims 1-8.

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