Liquefaction of PVC Mixed Plastics

Bhaskar, Thallada; Sakata, Yusaku

doi:10.1002/0470021543.ch18

Cited by 6 publications

(3 citation statements)

References 46 publications

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“…[1][2][3][4][5] The processes employed in these studies are based on the fact that PVC dehydrochlorination occurs as a result of a radical zipper reaction at 200°-250°C. 6 The thermal degradation of PVC results in almost complete dehydrochlorination above 260°C; 2 however, the process leads to the production of polyenes that form aromatic compounds to some extent.…”

Section: Introductionmentioning

confidence: 99%

Upgrading of poly(vinyl chloride) by chemical modifications using sodium sulfide

Yoshihara

Grause

Kameda

et al. 2010

J Mater Cycles Waste Manag

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The recycling of poly(vinyl chloride) (PVC) is one of the most important issues in the treatment of waste plastics. To improve PVC recycling, it is necessary to develop new recycling techniques, including new techniques for the dechlorination of chlorine-containing polymers. It has been established that wet dechlorination of PVC in NaOH/ethylene glycol solution is more effective than dry dechlorination. In this study, the wet process was used, and the chemical modifi cation of PVC by nucleophilic substitution was considered for upgrading waste PVC. Chlorine was substituted in solution by several nucleophilic reagents, thus changing the properties of PVC. The reaction of PVC in Na 2 S/ethylene glycol solution at 170°C resulted in the formation of a mixture comprising 32% elimination and 26% substitution products. The scanning electron microscopy/ energy dispersive X-ray spectroscopy mappings and elementary analysis of PVC indicated that this chlorinesubstitution process led to cross-linking by sulfur.

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Section: Introductionmentioning

confidence: 99%

Upgrading of poly(vinyl chloride) by chemical modifications using sodium sulfide

Yoshihara

Grause

Kameda

et al. 2010

J Mater Cycles Waste Manag

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“…Dry processes for the dechlorination of PVC have been reviewed by Bhaskar et al 2 and Montaudo et al 3 Recently, PVC was ground in air together with CaO and quartz powder (a grinding medium) with a small-scale planetary ball mill, resulting in mechanochemical dechlorination. 4 Several reports also described wet processes for the dechlorination of PVC.…”

Section: Introductionmentioning

confidence: 99%

Ball Mill-Assisted Dechlorination of Flexible and Rigid Poly(vinyl chloride) in NaOH/EG Solution

Kameda

Ono

Grause

et al. 2008

Ind. Eng. Chem. Res.

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Both flexible and rigid forms of poly(vinyl chloride) (PVC) were effectively dechlorinated in NaOH/ethylene glycol (EG) solution during ball mill pulverization. The high degree of dechlorination obtained was attributed to the increased surface area of the crushed PVC particles and the resulting enhancement of contact between the PVC and dissolved hydroxide ions. The common additives diisononyl phthalate and CaCO3 were easily separated from the PVC bulk during the dechlorination reaction. The reaction proceeded under chemical control, with degrees of dechlorination for both flexible and rigid PVC increasing with temperature with apparent activation energies of 110 and 80 kJ/mol, respectively. This reaction was accurately represented by a modified shrinking-core model.

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“…In the single-step process, the plastic samples were decomposed at a temperature of 430 • C and, simultaneously, the bromine and chlorine was removed completely. It was further reported that iron-oxide acts as a catalyst and as chlorine sorbent at the same time [115,116]. To avoid catalyst deactivation, a calcium sorbent can be added in a separate bed before the actual catalyst bed (see Fig.…”

Section: Creasolv® Process Contaminants Additivesmentioning

confidence: 99%

Towards high-quality petrochemical feedstocks from mixed plastic packaging waste via advanced recycling: The past, present and future

Kusenberg

Eschenbacher

Delva

et al. 2022

Fuel Processing Technology

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Liquefaction of PVC Mixed Plastics

Cited by 6 publications

References 46 publications

Upgrading of poly(vinyl chloride) by chemical modifications using sodium sulfide

Upgrading of poly(vinyl chloride) by chemical modifications using sodium sulfide

Ball Mill-Assisted Dechlorination of Flexible and Rigid Poly(vinyl chloride) in NaOH/EG Solution

Towards high-quality petrochemical feedstocks from mixed plastic packaging waste via advanced recycling: The past, present and future

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