2009
DOI: 10.1016/j.supflu.2009.04.012
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Fast supercritical fluid extraction of low- and high-density polyethylene additives: Comparison with conventional reflux and automatic Soxhlet extraction

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Cited by 56 publications
(23 citation statements)
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“…However, higher molecular weight contaminants cannot be efficiently or easily extracted by classical techniques, such as solvent or thermal based-extraction. These techniques present various disadvantages which limit their use in purification of polymers for the recycling in direct food contact and none of them can be considered as an optimal method for this purpose [9,10]. Consequently, the purification of post-consumer polyolefins requires an advanced technology for decontamination.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…However, higher molecular weight contaminants cannot be efficiently or easily extracted by classical techniques, such as solvent or thermal based-extraction. These techniques present various disadvantages which limit their use in purification of polymers for the recycling in direct food contact and none of them can be considered as an optimal method for this purpose [9,10]. Consequently, the purification of post-consumer polyolefins requires an advanced technology for decontamination.…”
Section: Introductionmentioning
confidence: 99%
“…SFE has been used successfully to extract citrate and benzoate plasticizers from poly(vinyl chloride) [22] and volatile organic components (VOCs) from polyethylene pellets [23]; quantitative extractions are obtained. Recent studies with polyethylene additives [9] and ungrafted monomers from polypropylene-graft-maleic anhydride [11] have shown that SFE is as efficient as conventional extraction but less time-consuming. More recent article describes the optimization of SFE parameters for the removal of residual glycidyl methacrylate monomers and benzoyl peroxide initiator from medium density polyethylene after grafting.…”
Section: Introductionmentioning
confidence: 99%
“…While Soxhlet extraction has a long history and is widely used, most studies utilizing this technique involve collection of final extracts for further processing [16][17][18][19][20], or comparison with other sample preparation techniques, for example, microwave-assisted extraction [21,22], super fluidic extraction [23][24][25][26], and accelerated extraction [27,28]. Although Soxhlet extraction is commonly used to investigate complex materials [29][30][31], it is a time-consuming step.…”
Section: Introductionmentioning
confidence: 99%
“…A extração por fluido supercrítico é descrita na literatura como uma técnica alternativa aos métodos clássicos de extração (Arias et al, 2009;Corso et al;Pederssetti et al, 2010;Nimet et al, 2011). No estado supercrítico, o fluido adquire uma densidade similar à de um líquido (portanto um poder de solvatação) e simultaneamente uma compressibilidade parecida com a de um gás.…”
Section: Introductionunclassified