WO2012046967A2 - Method of recycling a waste acrylic resin - Google Patents

Method of recycling a waste acrylic resin Download PDF

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Publication number
WO2012046967A2
WO2012046967A2 PCT/KR2011/007041 KR2011007041W WO2012046967A2 WO 2012046967 A2 WO2012046967 A2 WO 2012046967A2 KR 2011007041 W KR2011007041 W KR 2011007041W WO 2012046967 A2 WO2012046967 A2 WO 2012046967A2
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waste
acrylic
acrylic resin
recycling
water
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PCT/KR2011/007041
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French (fr)
Korean (ko)
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WO2012046967A3 (en
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최상근
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주식회사 에이치알테크놀로지
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Publication of WO2012046967A2 publication Critical patent/WO2012046967A2/en
Publication of WO2012046967A3 publication Critical patent/WO2012046967A3/en

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    • 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
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • 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
    • C08J2333/00—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate
    • 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

Definitions

  • the present invention relates to a method for recycling waste acrylic resin.
  • Methyl methacrylate a new material acrylic material, is widely used in household goods (adhesives, paints, inks, textile yarns, accessories, electronic office supplies, boards, etc.) and throughout the industry.
  • household goods adheresives, paints, inks, textile yarns, accessories, electronic office supplies, boards, etc.
  • the domestic market is not smooth due to the lack of domestic production, and some of them depend on imports.
  • the conventional technique of recycling the waste acrylic resin was collected, collected and crushed waste acrylate dissolved in methyl methacrylate and recycled.
  • the above technique has a disadvantage in that the molecular weight of the waste acrylate dissolved in methyl methacrylate is limited within a certain range so that the waste acrylate having a large molecular weight cannot be dissolved.
  • the conventional technique of pyrolyzing and recycling waste acrylic resin was a method of distilling and separating water having a low boiling point first in a reactor, and separating waste acrylic having a relatively high boiling point.
  • the conventional pyrolysis method has a disadvantage in that the purity of acryl is reduced because water and acryl are mixed with each other during the distillation process.
  • the existing waste acrylic recycling technology has various problems such as additional environmental problems due to harmful gases generated in the recycling process.
  • the present invention has been made to solve the above problems, and an object thereof is to provide a technology for effectively recycling waste acrylic resins.
  • a method for recycling waste acrylic resin comprises: a step of thermally decomposing the waste acrylic resin by heating at least 450 ° C. to extract water and an acrylic monomer mixture; And cooling the water and acrylic monomer mixture extracted from step A to 200 to 250 ° C. to separate acrylic monomers, thereby obtaining acrylic monomers. Characterized in that it comprises a.
  • the recycling method of the waste acrylic resin may include a step C to improve the purity of the acrylic monomer by multi-distilling the acrylic monomer obtained from the step B again; It characterized in that it further comprises.
  • the waste acrylic resin is characterized in that the methyl methacrylate, polymethyl methacrylate, aluminum oxide or a mixture thereof.
  • Recycling of the waste acrylic resin may include a step D of recovering aluminum oxide by heat-treating the residue not extracted in step A at 800 to 1200 ° C. for at least 1 hour; It characterized in that it further comprises.
  • the recycling method of the waste acrylic resin may include a step E of re-supplying the necessary heat between the steps of the distillation of step C by supplying the residue remaining after distillation in step C to a firing furnace; It characterized in that it further comprises.
  • the waste acrylic resin recycling method is characterized in that the exhaust gas generated in each step is discharged to the outside through the outlet having a filter means.
  • the waste acrylic resin is separated through a pyrolysis process, it is possible to separate the acrylic monomer regardless of the molecular weight of the waste acrylate.
  • FIG. 1 illustrates an apparatus for recovering acrylic monomers and aluminum oxide from waste acrylic resins according to a preferred embodiment of the present invention.
  • Figure 2 is a block diagram showing a recovery process of the acrylic monomer and aluminum oxide from the waste acrylic resin according to the present invention.
  • FIG. 1 illustrates an apparatus for recovering acrylic monomers and aluminum oxide from waste acrylic resins according to a preferred embodiment of the present invention.
  • the reactor 100 decomposes the waste acrylic resin into a mixture of water and an acrylic monomer.
  • the reactor 100 for pyrolyzing the waste acrylic resin generally uses a closed stirred reactor, but those skilled in the art may change and use the type of the reactor 100 according to the purpose of the present invention. .
  • the reactor 100 is rapidly heated to 450 ° C. to separate the waste acrylic resin into a mixture of water and acrylic monomers.
  • the mixture generated by the temperature increase in the reactor 100 is moved to the cooler 200 by the pressure difference.
  • the cooler 200 may cool the water and acrylic monomer mixture to 200 to 250 ° C. to liquefy the acrylic monomer to separate from the water.
  • the inlet and the outlet of the coolant may be provided at one side of the cooler 200 to continuously supply the coolant.
  • the water vapor in the cooler 200 may be moved to the steam collecting unit 800 to be discharged to the outside or recycled as cooling water.
  • the heating means 300 heats the acrylic monomer introduced into the distillation column 400 so that the acrylic monomer can be distilled in multiple stages according to the temperature in the distillation column.
  • the purity of the acrylic monomers extracted primarily from the cooler 200 may be improved.
  • the circulation pump 500 forms a predetermined pressure inside the moving pipe so that the residue remaining after distillation in the distillation tower 400 may be moved to the firing furnace 600.
  • the kiln 600 heats the residue remaining after distillation in the distillation column 400 and completely burns the heat.
  • the heat generated in the combustion process may be transferred to the heating means 300 and reused as heat necessary for the distillation process.
  • the firing furnace 600 may extract aluminum oxide by heat-treating the residue of the waste acrylic resin remaining in the reactor 100 at a high temperature of 800 to 1200 ° C.
  • the extracted aluminum oxide may be collected in the extraction unit 700 and recycled as a material of acrylic artificial marble.
  • the waste acrylic resin is separated into a mixture of water and an acrylic monomer through pyrolysis in the reactor 100.
  • the waste acrylic resin is preferably a mixture containing methyl methacrylate, polymethyl methacrylate, aluminum oxide and the like.
  • a mixture of water and an acrylic monomer may be separated from the waste acrylic resin (S101). That is, while the boiling point of the acrylic monomer is 450 °C, the temperature at which the water is separated from 200 to 250 °C because the water is separated in a mixed form with the acrylic monomer.
  • the mixture generated by the temperature increase in the reactor 100 is moved to the cooler 200 by the pressure difference.
  • the acrylic monomer may be liquefied and separated from water (S102).
  • S102 water
  • pure distillation was difficult because different materials having different boiling points may be extracted by being mixed with each other in a gaseous state.
  • the water and the acrylic monomer can be separated at once by rapidly raising the temperature to 450 ° C., which is a temperature at which the acrylic monomer can be separated from the waste acrylic resin.
  • 450 ° C. which is a temperature at which the acrylic monomer can be separated from the waste acrylic resin.
  • cooling the extracted mixture to 200 to 250 °C, it is possible to separate the acrylic monomer having a higher boiling point than water.
  • the separation method of the waste acrylic resin according to the present invention can contribute to improving the recycling efficiency of the waste acrylic resin.
  • the amount of waste generated is reduced, thereby preventing further environmental pollution due to landfilling.
  • the acrylic monomer separated from the water can be used by itself, but it is preferable to go through a subsequent step of improving the purity such as multi-stage distillation.
  • Acrylic monomer is separated from the water is moved to the distillation column 400 for the multi-stage distillation (S103). It is possible to obtain a high purity acrylic monomer through the distillation and condensation process in the distillation column 400 having a 250 to 450 °C, preferably 350 to 450 °C.
  • Each equipment involved in the recycling process of the waste acrylic resin may be provided with a separate filter means. Therefore, by filtering the exhaust gas generated during the recycling process including the pyrolysis step, the multi-stage distillation step, aluminum oxide recovery step and the combustion step in the kiln 600, it is possible to prevent additional environmental pollution.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The present invention relates to a method of recycling a waste acrylic resin, which provides an effective technology for recycling waste acrylic resin by comprising: step A of performing thermal decomposition by raising the temperature of a waste acrylic resin to 450 ℃ or higher to thereby extract water and acrylic monomer mixture; and step B of obtaining acrylic monomers by cooling the water and acrylic monomer mixture extracted from the step A to 200 to 250 ℃ and separating the acrylic monomers. According to the present invention, the waste acrylic resin is separated through thermal decomposition, and thus acrylic monomers can be separated regardless of the molecular weight of waste acrylate. Additionally, a high-purity acryl can be obtained because the acrylic monomer which has a high boiling point is separated first, prior to water. Also, it is possible to prevent additional environmental contamination by filtering toxic gas which may be produced during a recycling process.

Description

폐아크릴계 수지의 재활용 방법Recycling method of waste acrylic resin
본 발명은 폐아크릴계 수지를 재활용할 수 있는 방법에 관한 것이다.The present invention relates to a method for recycling waste acrylic resin.
신소재 아크릴 원료인 메틸메타아크릴레이트는 생활용품(접착제, 페인트, 잉크, 섬유용 실, 악세사리 제품, 전자 사무용품, 판재 등) 및 산업전반에 걸쳐 다양하게 활용되고 있다. 그러나 그 수요에 비해 국내 생산량이 부족하여 내수시장이 원활하지 못하며, 일부는 수입에 의존하고 있는 실정이다. Methyl methacrylate, a new material acrylic material, is widely used in household goods (adhesives, paints, inks, textile yarns, accessories, electronic office supplies, boards, etc.) and throughout the industry. However, the domestic market is not smooth due to the lack of domestic production, and some of them depend on imports.
또한 최근 원유가격의 폭등으로 인해 에너지 생산 및 석유관련 제품의 원가가 상승되어 국내 산업전반에 악영향을 미치고 있다. 이러한 석유관련 제품 중의 하나인 아크릴 또한 그 영향을 받고 있다. In addition, the recent surge in oil prices has raised the cost of energy production and petroleum products, adversely affecting the domestic industry. Acrylic, one of these petroleum products, is also affected.
따라서 폐아크릴의 재활용 문제는 자원이 부족한 우리나라의 경우, 에너지 비용 절감과 자원 재활용 및 환경적 측면에서 그 필요성이 증대되고 있다.Therefore, the recycling problem of waste acrylic is increasing in the case of Korea where resources are scarce in terms of energy cost reduction, resource recycling and environmental aspects.
한편, 폐아크릴 수지를 재활용하는 종래의 기술은 폐아크릴레이트를 수거, 소집 및 파쇄하여 메틸메타아크릴레이트에 용해하여 재활용하였다. 하지만, 상기 기술은 메틸메타아크릴레이트에 용해되는 폐아크릴레이트의 분자량이 일정 범위 안으로 제한되어 있어 분자량이 큰 폐아크릴레이트는 용해할 수 없다는 단점이 있다. On the other hand, the conventional technique of recycling the waste acrylic resin was collected, collected and crushed waste acrylate dissolved in methyl methacrylate and recycled. However, the above technique has a disadvantage in that the molecular weight of the waste acrylate dissolved in methyl methacrylate is limited within a certain range so that the waste acrylate having a large molecular weight cannot be dissolved.
또한, 폐아크릴 수지를 열분해하여 재활용하는 종래의 기술은 반응기 내에서 비점이 낮은 물을 먼저 증류하여 분리하고, 상대적으로 비점이 높은 폐아크릴을 분리하는 방식이었다. 하지만, 기존의 열분해 방법은 증류 과정간 물과 아크릴이 서로 혼합되어 아크릴의 순도가 저하된다는 단점이 있다. In addition, the conventional technique of pyrolyzing and recycling waste acrylic resin was a method of distilling and separating water having a low boiling point first in a reactor, and separating waste acrylic having a relatively high boiling point. However, the conventional pyrolysis method has a disadvantage in that the purity of acryl is reduced because water and acryl are mixed with each other during the distillation process.
더욱이, 기존의 폐아크릴 재활용 기술은 재활용 공정에서 발생하는 유해가스 등으로 인해 추가적인 환경문제가 발생하는 등 여러가지 문제점을 가지고 있다.Moreover, the existing waste acrylic recycling technology has various problems such as additional environmental problems due to harmful gases generated in the recycling process.
본 발명은 상술한 문제점을 해결하기 위한 것으로, 폐아크릴계 수지를 효과적으로 재활용하는 기술을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, and an object thereof is to provide a technology for effectively recycling waste acrylic resins.
이러한 목적을 달성하기 위하여 본 발명의 일 태양으로 폐아크릴계 수지의 재활용 방법은 폐아크릴계 수지를 450℃ 이상 승온함으로써 열분해하여 물 및 아크릴계 모노머 혼합물을 추출하는 A단계; 및 상기 A단계로부터 추출된 상기 물 및 아크릴계 모노머 혼합물을 200 내지 250℃로 냉각시켜 아크릴계 모노머를 분리함으로써, 아크릴계 모노머를 획득하는 B단계; 를 포함하는 것을 특징으로 한다.In order to achieve the above object, in one aspect of the present invention, a method for recycling waste acrylic resin comprises: a step of thermally decomposing the waste acrylic resin by heating at least 450 ° C. to extract water and an acrylic monomer mixture; And cooling the water and acrylic monomer mixture extracted from step A to 200 to 250 ° C. to separate acrylic monomers, thereby obtaining acrylic monomers. Characterized in that it comprises a.
또한, 폐아크릴계 수지의 재활용 방법은 상기 B단계로부터 획득된 아크릴계 모노머를 다시 다단 증류하여 상기 아크릴계 모노머의 순도를 향상시키는 C단계; 를 더 포함하는 것을 특징으로 한다.In addition, the recycling method of the waste acrylic resin may include a step C to improve the purity of the acrylic monomer by multi-distilling the acrylic monomer obtained from the step B again; It characterized in that it further comprises.
한편, 상기 폐아크릴계 수지는 메틸메타아크릴레이트, 폴리메틸메타아크릴레이트, 산화알루미늄 또는 이들의 혼합물인 것을 특징으로 한다.On the other hand, the waste acrylic resin is characterized in that the methyl methacrylate, polymethyl methacrylate, aluminum oxide or a mixture thereof.
폐아크릴계 수지의 재활용 방법은 상기 A단계에서 추출되지 못한 잔여물을 800 내지 1200℃에서 1시간 이상 열처리하여 산화알루미늄을 회수하는 D단계; 를 더 포함하는 것을 특징으로 한다.Recycling of the waste acrylic resin may include a step D of recovering aluminum oxide by heat-treating the residue not extracted in step A at 800 to 1200 ° C. for at least 1 hour; It characterized in that it further comprises.
더욱이, 폐아크릴계 수지의 재활용 방법은 상기 C단계에서 증류되고 남은 잔여물을 소성로로 공급하여 상기 C단계의 증류 과정 간에 필요한 열을 재공급하는 E단계; 를 더 포함하는 것을 특징으로 한다. Furthermore, the recycling method of the waste acrylic resin may include a step E of re-supplying the necessary heat between the steps of the distillation of step C by supplying the residue remaining after distillation in step C to a firing furnace; It characterized in that it further comprises.
아울러, 폐아크릴계 수지의 재활용 방법은 상기 각 단계에서 발생하는 배출가스가 필터수단을 구비한 배출구를 통해서 외부로 배출되는 것을 특징으로 한다.In addition, the waste acrylic resin recycling method is characterized in that the exhaust gas generated in each step is discharged to the outside through the outlet having a filter means.
이상에서 설명한 바와 같이 본 발명에 의하면, 열분해 과정을 통해 폐아크릴계 수지가 분리되므로 폐아크릴레이트의 분자량과 관계없이 아크릴계 모노머의 분리가 가능하다. As described above, according to the present invention, since the waste acrylic resin is separated through a pyrolysis process, it is possible to separate the acrylic monomer regardless of the molecular weight of the waste acrylate.
또한, 비점이 높은 아크릴계 모노머를 물보다 먼저 분리하므로 높은 순도의 아크릴을 얻을 수 있다. In addition, since the acrylic monomer having a high boiling point is separated before water, high purity acrylic can be obtained.
그리고, 재활용 공정간 발생할 수 있는 유해가스를 필터링하여 추가적인 환경오염을 방지할 수 있다.In addition, it is possible to prevent additional environmental pollution by filtering harmful gases that may occur between recycling processes.
도1은 본 발명의 바람직한 실시예에 따른 폐아크릴계 수지로부터 아크릴계 모노머 및 산화알루미늄의 회수를 위한 장치를 도시한 것이다.1 illustrates an apparatus for recovering acrylic monomers and aluminum oxide from waste acrylic resins according to a preferred embodiment of the present invention.
도2는 본 발명에 따른 폐아크릴계 수지로부터 아크릴계 모노머 및 산화알루미늄의 회수 과정을 도시한 블록도이다.Figure 2 is a block diagram showing a recovery process of the acrylic monomer and aluminum oxide from the waste acrylic resin according to the present invention.
◎부호의 설명◎◎ Description of the sign ◎
100 : 반응기100: reactor
200 : 냉각기200: cooler
300 : 가열수단300: heating means
400 : 증류탑400: distillation column
500 : 순환펌프500: circulation pump
600 : 소성로600: firing furnace
700 : 증기 수집부700: steam collector
800 : 추출부 800: extraction unit
본 발명의 바람직한 실시예에 대하여 첨부된 도면을 참조하여 더 구체적으로 설명하되, 이미 주지되어진 기술적 부분에 대해서는 설명의 간결함을 위해 생략하거나 압축하기로 한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, and the well-known technical parts will be omitted or compressed for brevity of description.
◎장치에 대한 설명 ◎ Description of the device
도1은 본 발명의 바람직한 실시예에 따른 폐아크릴계 수지로부터 아크릴계 모노머 및 산화알루미늄의 회수를 위한 장치를 도시한 것이다.1 illustrates an apparatus for recovering acrylic monomers and aluminum oxide from waste acrylic resins according to a preferred embodiment of the present invention.
반응기(100)는 폐아크릴계 수지를 열분해하여 물 및 아크릴계 모노머의 혼합물로 분리한다. 폐아크릴계 수지를 열분해하는 반응기(100)는 통상 밀폐형 교반 반응기를 사용하나, 본 발명에 해당하는 기술 분야의 통상의 지식을 가진 자는 발명의 목적에 따라 반응기(100)의 종류를 변경하여 사용할 수 있다. The reactor 100 decomposes the waste acrylic resin into a mixture of water and an acrylic monomer. The reactor 100 for pyrolyzing the waste acrylic resin generally uses a closed stirred reactor, but those skilled in the art may change and use the type of the reactor 100 according to the purpose of the present invention. .
반응기(100)는 450℃까지 급속 승온하여 폐아크릴계 수지를 물 및 아크릴계 모노머의 혼합물로 분리시킨다. 한편, 반응기(100) 내에서 승온으로 인해 생성된 혼합물은 압력차에 의해 냉각기(200)로 이동하게 된다. The reactor 100 is rapidly heated to 450 ° C. to separate the waste acrylic resin into a mixture of water and acrylic monomers. On the other hand, the mixture generated by the temperature increase in the reactor 100 is moved to the cooler 200 by the pressure difference.
냉각기(200)는 물 및 아크릴계 모노머 혼합물을 200 내지 250℃로 냉각하여 아크릴계 모노머를 액화시켜 물로부터 분리할 수 있다. 또한, 냉각기(200)의 일 측면에 냉각수의 입구 및 출구를 구비하여 냉각수의 공급이 지속적으로 이루어질 수 있다. 한편, 냉각기(200) 내에 있던 수증기는 증기 수집부(800)로 이동되어 외부로 방출되거나 냉각수로 재활용될 수 있다.The cooler 200 may cool the water and acrylic monomer mixture to 200 to 250 ° C. to liquefy the acrylic monomer to separate from the water. In addition, the inlet and the outlet of the coolant may be provided at one side of the cooler 200 to continuously supply the coolant. On the other hand, the water vapor in the cooler 200 may be moved to the steam collecting unit 800 to be discharged to the outside or recycled as cooling water.
가열수단(300)은 증류탑(400)으로 유입되는 아크릴계 모노머를 가열함으로써, 아크릴계 모노머가 증류탑 내에서 온도에 따라 다단 증류될 수 있도록 한다. The heating means 300 heats the acrylic monomer introduced into the distillation column 400 so that the acrylic monomer can be distilled in multiple stages according to the temperature in the distillation column.
증류탑(400)에서는 아크릴계 모노머를 온도에 따라 재증류함으로써, 냉각기(200)로부터 1차 추출된 아크릴계 모노머의 순도를 향상시킬 수 있다. In the distillation column 400, by distilling the acrylic monomers according to the temperature, the purity of the acrylic monomers extracted primarily from the cooler 200 may be improved.
순환펌프(500)는 이동용 관로 내부에 일정 압력을 조성하여 증류탑(400) 내부에서 증류되고 남은 잔여물이 소성로(600)로 이동될 수 있도록 한다.The circulation pump 500 forms a predetermined pressure inside the moving pipe so that the residue remaining after distillation in the distillation tower 400 may be moved to the firing furnace 600.
소성로(600)는 증류탑(400) 내부에서 증류되고 남은 잔여물을 가열하여 완전 연소시키며, 연소 과정에서 발생된 열은 가열수단(300)으로 이동되어 증류 과정에 필요한 열로 재사용될 수 있다. 또한, 소성로(600)는 반응기(100) 내에 남아있던 폐아크릴계 수지의 잔여물을 800 내지 1200℃의 고온에서 열처리함으로써, 산화알루미늄을 추출할 수 있다. 추출된 산화알루미늄은 추출부(700) 내에 수집되어 아크릴계 인조대리석의 재료로 재활용될 수 있다.The kiln 600 heats the residue remaining after distillation in the distillation column 400 and completely burns the heat. The heat generated in the combustion process may be transferred to the heating means 300 and reused as heat necessary for the distillation process. In addition, the firing furnace 600 may extract aluminum oxide by heat-treating the residue of the waste acrylic resin remaining in the reactor 100 at a high temperature of 800 to 1200 ° C. The extracted aluminum oxide may be collected in the extraction unit 700 and recycled as a material of acrylic artificial marble.
◎방법에 대한 설명 ◎ Description of the method
먼저, 폐아크릴계 수지는 반응기(100) 내에서 열분해 과정을 거쳐 물 및 아크릴계 모노머의 혼합물로 분리된다. 이 때, 폐아크릴계 수지는 메틸메타아크릴레이트, 폴리메틸메타아크릴레이트, 산화알루미늄 등을 포함하는 혼합물인 것이 바람직하다. First, the waste acrylic resin is separated into a mixture of water and an acrylic monomer through pyrolysis in the reactor 100. At this time, the waste acrylic resin is preferably a mixture containing methyl methacrylate, polymethyl methacrylate, aluminum oxide and the like.
반응기(100) 내에서 450℃까지 급속하게 승온이 이루어짐에 따라, 폐아크릴계 수지로부터 물 및 아크릴계 모노머의 혼합물이 분리될 수 있다(S101). 즉, 아크릴계 모노머의 비점이 450℃인 반면, 물이 분리되는 온도는 200 내지 250℃이므로 물이 아크릴계 모노머와 혼합된 형태로 분리된다. 한편, 반응기(100) 내에서 승온으로 인해 생성된 혼합물은 압력차에 의해 냉각기(200)로 이동하게 된다. As the temperature is rapidly increased to 450 ° C. in the reactor 100, a mixture of water and an acrylic monomer may be separated from the waste acrylic resin (S101). That is, while the boiling point of the acrylic monomer is 450 ℃, the temperature at which the water is separated from 200 to 250 ℃ because the water is separated in a mixed form with the acrylic monomer. On the other hand, the mixture generated by the temperature increase in the reactor 100 is moved to the cooler 200 by the pressure difference.
물 및 아크릴계 모노머 혼합물은 냉각기(200) 내에서 200 내지 250℃로 냉각이 이루어짐에 따라, 아크릴계 모노머가 액화되어 물과 분리될 수 있다(S102). 단계적으로 승온하여 순차적으로 물질의 증류가 이루어지던 기존의 열분해 방식은 비점이 서로 다른 물질이 기체 상태에서 서로 혼합되어 추출될 가능성이 있으므로 순수한 증류가 어려웠다. As the water and acrylic monomer mixture is cooled to 200 to 250 ° C. in the cooler 200, the acrylic monomer may be liquefied and separated from water (S102). In the conventional pyrolysis method in which the temperature was gradually raised to sequentially distill materials, pure distillation was difficult because different materials having different boiling points may be extracted by being mixed with each other in a gaseous state.
하지만, 본 발명의 바람직한 실시예에 따른 증류 방법은 아크릴계 모노머가 폐아크릴계 수지로부터 분리될 수 있는 온도인 450℃까지 급속 승온함으로써, 물과 아크릴계 모노머를 단번에 분리할 수 있다. 또한, 추출된 혼합물을 200 내지 250℃로 냉각시킴으로써, 물보다 비점이 높은 아크릴계 모노머를 분리할 수 있다. However, in the distillation method according to a preferred embodiment of the present invention, the water and the acrylic monomer can be separated at once by rapidly raising the temperature to 450 ° C., which is a temperature at which the acrylic monomer can be separated from the waste acrylic resin. In addition, by cooling the extracted mixture to 200 to 250 ℃, it is possible to separate the acrylic monomer having a higher boiling point than water.
따라서, 기존의 열분해 방식보다 더 높은 순도의 아크릴계 모노머를 얻을 수 있다. 아울러, 본 발명에 따른 폐아크릴계 수지의 분리 방법은 폐아크릴계 수지의 재활용 효율을 향상시키는데 기여할 수 있다. 또한, 그로인해 폐기물 발생량이 감소하므로 폐기물 매립으로 인한 추가적인 환경오염을 방지할 수 있다. Therefore, higher purity acrylic monomers can be obtained than conventional pyrolysis methods. In addition, the separation method of the waste acrylic resin according to the present invention can contribute to improving the recycling efficiency of the waste acrylic resin. In addition, the amount of waste generated is reduced, thereby preventing further environmental pollution due to landfilling.
물과 분리된 아크릴계 모노머는 그 자체로도 사용 가능하지만, 다단 증류 등의 순도를 향상시키는 후속 공정을 거치는 것이 바람직하다. 아크릴계 모노머는 물과 분리되어 다단 증류를 위한 증류탑(400)으로 이동하게 된다(S103). 250 내지 450℃, 바람직하게는 350 내지 450℃를 갖는 증류탑(400) 내에서 증류 및 응축 과정을 통해 고순도의 아크릴계 모노머를 얻을 수 있다. The acrylic monomer separated from the water can be used by itself, but it is preferable to go through a subsequent step of improving the purity such as multi-stage distillation. Acrylic monomer is separated from the water is moved to the distillation column 400 for the multi-stage distillation (S103). It is possible to obtain a high purity acrylic monomer through the distillation and condensation process in the distillation column 400 having a 250 to 450 ℃, preferably 350 to 450 ℃.
한편, 반응기(100) 내에서 물 및 아크릴계 모노머 혼합물이 분리된 이후에 남아 있는 잔여물이 소성로(600)로 이동되어 800 내지 1200℃에서 1시간 이상 열처리됨에 따라, 잔여물로부터 산화알루미늄을 회수할 수 있다(S104). On the other hand, as the residue remaining after the water and acrylic monomer mixture in the reactor 100 is separated is moved to the kiln 600 and heat-treated at 800 to 1200 ℃ for more than 1 hour, to recover the aluminum oxide from the residue It may be (S104).
상기 폐아크릴계 수지의 재활용 공정 과정에 관여하는 각 장비는 별도의 필터수단을 구비할 수 있다. 따라서, 상술한 열분해 단계, 다단 증류 단계, 산화알루미늄 회수 단계 및 소성로(600) 내에서의 연소 단계를 포함하는 재활용 공정 과정에서 발생하는 배출가스를 필터링하여 추가적인 환경오염을 방지할 수 있다.Each equipment involved in the recycling process of the waste acrylic resin may be provided with a separate filter means. Therefore, by filtering the exhaust gas generated during the recycling process including the pyrolysis step, the multi-stage distillation step, aluminum oxide recovery step and the combustion step in the kiln 600, it is possible to prevent additional environmental pollution.
위에서 설명한 바와 같이 본 발명에 대한 구체적인 설명은 첨부된 도면을 참조한 실시예에 의해서 이루어졌지만, 상술한 실시예는 본 발명의 바람직한 예를 들어 설명하였을 뿐이기 때문에, 본 발명이 상기의 실시예에만 국한되는 것으로 이해되어져서는 아니 되며, 본 발명의 권리범위는 후술하는 청구범위 및 그 등가개념으로 이해되어져야 할 것이다.As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings. However, since the above-described embodiments have only been described with reference to preferred examples of the present invention, the present invention is limited to the above embodiments. It should not be understood that the scope of the present invention is to be understood by the claims and equivalent concepts described below.

Claims (4)

  1. 폐아크릴계 수지를 450℃까지 승온함으로써 열분해하여 물 및 아크릴계 모노머 혼합물을 추출하는 A단계; A step of pyrolyzing the waste acrylic resin by heating to 450 ℃ to extract water and acrylic monomer mixture;
    상기 A단계로부터 추출된 상기 물 및 아크릴계 모노머 혼합물을 200 내지 250℃로 냉각시켜 아크릴계 모노머를 분리함으로써, 아크릴계 모노머를 획득하는 B단계; Cooling the water and acrylic monomer mixture extracted from step A to 200 to 250 ° C. to separate acrylic monomers, thereby obtaining acrylic monomers;
    상기 B단계로부터 획득된 아크릴계 모노머를 다시 다단 증류하여 상기 아크릴계 모노머의 순도를 향상시키는 C단계;C step of improving the purity of the acrylic monomer by multi-distillation of the acrylic monomer obtained from the step B again;
    상기 C단계에서 증류되고 남은 잔여물을 소성로로 공급하여 상기 C단계의 증류 과정 간에 필요한 열을 가열수단으로 재공급하는 E단계; 를 포함하는 것을 특징으로 하는E step of supplying the remaining residue distilled in the step C to the firing furnace to supply the necessary heat between the distillation process of the step C to the heating means; Characterized in that it comprises
    폐아크릴계 수지의 재활용 방법.Recycling method of waste acrylic resin.
  2. 제1항에 있어서,The method of claim 1,
    상기 폐아크릴계 수지는 메틸메타아크릴레이트, 폴리메틸메타아크릴레이트, 산화알루미늄 또는 이들의 혼합물을 포함하는 것을 특징으로 하는The waste acrylic resin is characterized in that it comprises methyl methacrylate, polymethyl methacrylate, aluminum oxide or a mixture thereof.
    폐아크릴계 수지의 재활용 방법.Recycling method of waste acrylic resin.
  3. 제1항에 있어서,The method of claim 1,
    상기 A단계에서 추출되지 못한 잔여물을 800 내지 1200℃에서 1시간 이상 열처리하여 산화알루미늄을 회수하는 D단계; 를 더 포함하는 것을 특징으로 하는 A step D of recovering aluminum oxide by heat-treating the residue not extracted in the step A at 800 to 1200 ° C. for 1 hour or more; Characterized in that it further comprises
    폐아크릴계 수지의 재활용 방법.Recycling method of waste acrylic resin.
  4. 제1항, 제2항, 및 제3항 중 어느 한 항에 있어서,The method according to any one of claims 1, 2, and 3,
    상기 각 단계에서 발생하는 배출가스는 필터수단을 구비한 배출구를 통해서 외부로 배출되는 것을 특징으로 하는폐아크릴계 수지의 재활용 방법.The waste gas generated in each step is discharged to the outside through the discharge port provided with a filter means.
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