Chemical Recycling of Waste PET Bottles

2002 ◽  
Vol 2002.12 (0) ◽  
pp. 239-241
Author(s):  
Kazuho TANAKA ◽  
Kenji SUZUKI
Keyword(s):  
Chemical Recycling ◽  
Pet Bottles

scholarly journals Removal of Contaminations from Waste PET Bottles in Chemical Recycling

2008 ◽  
Vol 74 (748) ◽  
pp. 2642-2647
Author(s):  
Hideshi KURIHARA ◽  
Kimihiko SATO ◽  
Kazuhiko MURAKAMI ◽  
Masahiro OTA
Keyword(s):  
Chemical Recycling ◽  
Pet Bottles

scholarly journals Removal of Contaminations from Waste PET Bottles in Chemical Recycling

2010 ◽  
Vol 5 (1) ◽  
pp. 114-121
Author(s):  
Hideshi KURIHARA ◽  
Kimihiko SATO ◽  
Kazuhiko MURAKAMI ◽  
Masahiro OTA
Keyword(s):  
Chemical Recycling ◽  
Pet Bottles

Crosslinking and Reinforcement of PET/TiO2/Clay Composites for Pavement Applications

2010 ◽  
Vol 168-170 ◽  
pp. 2340-2343
Author(s):  
Angelica Silvestre Lopez Rodriguez ◽  
Pio Sifuentes-Gallardo ◽  
Carolina Sorto Castañon ◽  
Laura Lorena Díaz Flores ◽  
Miguel Angel Hernández Rivera ◽  
...  
Keyword(s):  
Construction Industry ◽  
Soxhlet Extraction ◽  
Clay Content ◽  
Raw Material ◽  
Chemical Recycling ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Crosslinked Polymer ◽  
Concrete Materials ◽  
Thermal Stability Of

This project studies the alternative chemical recycling of disposable bottles as raw material for the manufacture of a product known as polymeric concrete, which has several applications in the construction industry. Crosslinked materials from polyethylene terephthalate (PET), glycerol and clay were obtained. First recycled PET bottles were washed, cut and dried; after bis-hydroxyethyl terephthalate monomer was obtained from depolimerization reaction of PET. The monomer, glycerol and titanium dioxide reacts to synthesize a polymeric concrete. Materials with concentrations of clay from 1, 10, 20, 30, 40 and 50%w/w were obtained. Differential scanning calorimeter (DSC), Soxhlet extraction, colorimetry and Shore D hardness were used to characterize the materials. The results indicated a degree of crosslinking in the synthesized material when the amount of clay was increased. A melting point around 265 °C was not observed by DSC analysis; this suggests that a crosslinked material was formed. By TGA analysis temperature degradation was observed at 394°C, which it was increasing from 408 to 416°C according to the addition of clay content. A bad dispersion of particles in the crosslinked polymer decreased the thermal stability of PET when the clay content was increased.

Instantaneous hydrolysis of PET bottles: an efficient pathway to the chemical recycling of condensation polymers

2021 ◽  
Author(s):  
Jose Jonathan Rubio Arias ◽  
Wim Thielemans
Keyword(s):  
Chemical Recycling ◽  
Pet Bottles ◽  
Condensation Polymers ◽  
Environmental Balance ◽  
Hydrolysis Of

Restoring the environmental balance that was disturbed by the rise of plastic commodities is a must for researchers and the wider community. It is imperative that the increasing amount of...

scholarly journals Preparation, characterization, and evaluation of polymeric resin (BHMET) from the reaction of malic anhydride with recycled PET as a corrosion inhibitor for Csteel in HCl

2019 ◽  
Vol 7 (1) ◽  
pp. 1-11
Author(s):  
Yasir A ◽  
Khalaf A ◽  
Khalaf M
Keyword(s):  
Corrosion Inhibitor ◽  
Soft Drink ◽  
Ester Group ◽  
Material Surface ◽  
Chemical Recycling ◽  
Distilled Water ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Catalyst Temperature ◽  
Corrosion Mechanisms

Introduction: The plastic soft drink bottle from polyethylene terephthalate (PET) was introduced to consumers in 1970s. Because PET have ester group its chemical recycling is preferred. To control and reducethe environmental pollution recycling and reusing of PET has turned into an imperative procedure from the ecological perspective and it has given business opportunity because of far reaching use and accessibilityof PET polymer. Also another source of pollution to the environment was the corrosion of materials. Corrosion is the deterioration and loss of a material and its critical properties due to chemical, electrochemical and other reactions of the exposed material surface with the surrounding environment. Understanding corrosion mechanisms allow to use corrosion-resistant materials and altering designs. Organic inhibitors are very efficient to protect the metals from corrosion in all chemicals (acidic, basic and salt) media. There were many types of corrosion inhibitors and the organic inhibitor are being applied widely to protect metals from corrosion in many aggressive media. The aim of this study is to utilize waste PET-bottles will be depolarized by 2,2-dithioethanol to produce (Bis(2-((2-hydroxyethyl) thio) ethyl) terephthalate (BHTE), then by reacting of (BHTE) with maleic anhydride to produce Bis (2-((6-Mono malic acid –hydroxyethyl ester) sulfanyl) ethyl terephthalate(BHMET). The prepared (BHMET) will be used as corrosion inhibitor andits efficiency to protect the carbon steel in acidic will be assessed. Materials and Methods: Depolymerization of PET waste done with 2,2-dithioethanol. The weight proportion of PET to 2,2-dithioethanol 1:8 (wt%) and zinc acetate (0.5 wt% based on PET) was added as catalyst. Temperature of the reaction mixture was between 160-180 oC for 12 h, then the reaction mixture was kept at 140 oC for 3 h, then allowed to cool to room temperature. With vigorous agitation distilled water in excess to the reaction mixture to allow the black liquid viscous compound oligomer of Bis(2-((2-hydroxyethyl) thio) ethyl terephthalate (BHET) to precipitate. In a three neck round bottom (250 ml) attached with mechanical stirrer and thermometer (5.7gm) of (BHET) compound was added and heated for (15 min.) at (60 OC). Then (2.5gm) of malic anhydride and (1%) sulfuric acid was added. By the mechanical stirrer the mixture was mixed for (50 min.) at temperature (80OC). After the reaction the mixture was washed with distilled water to avoid the acid residue. Scheme (1) shows the mechanism for the prepared (BHMET) corrosion inhibitor.

PENGGUNAAN AIR SUPER KRITIS PADA DEPOLIMERISASI NYLON-12 (BATCH PROCESS)

2018 ◽  
Vol 5 (3) ◽  
Author(s):  
Mohamad Yusman
Keyword(s):  
Supercritical Water ◽  
Scale Up ◽  
Experimental Studies ◽  
Reaction System ◽  
Batch Process ◽  
Chemical Recycling ◽  
Water Decomposition ◽  
Product Distributions ◽  
New Process ◽  
Nylon 12

Water at the supercritical state is a new process for the chemical recycling. At this thermodynamic state i.e. Pc = 218 atmospheres and Tc = 374oC , water behaves very differently from its everyday temperament and it is a very good solvent for organic components. Experimental studies show that supercritical water can decompose hydrocarbons/polymers and produce useful products like 2-Azacyclotridecanone /lactam-1 from Nylon-12 (batch process). The decomposition process itself was carried out in batch reaction system in order to get more information about product distributions, time dependence, and scale-up possibilities.Keywords: supercritical water, decomposition, batch, polymer, hydrocarbon

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