Hydrolysis of polyurethane foam waste

Mahoney, L. R.; Weiner, Steven A.; Ferris, Fred C.

doi:10.1021/es60087a010

Cited by 56 publications

(28 citation statements)

References 2 publications

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“…Current methods for chemical degrading polyurethane into low molecular weight compounds include glycolysis [3][4][5][6][7][8][9][10][11][12], hydrolysis [13][14][15], aminolysis [16,17] and other chemical processes [18][19][20][21][22]. Among these chemical-recycling processes, glycolysis is much favored and has been paid more attention due to its mild reaction conditions and highly reproducible properties of the recycled products.…”

Section: Introductionmentioning

confidence: 99%

Chemical degradation of thermoplastic polyurethane for recycling polyether polyol

Wang

Chen

Chen³

et al. 2011

Fibers Polym

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Thermoplastic polyurethane, based on 4,4'-diphenylmethane diisocyanate and polyether polyol, was degraded by glycol and ethanolamine at 170 o C. Optimum conditions for the glycolysis of thermoplastic polyurethane were investigated by adjusting the ratio of polymer to degradation reagent, glycol to ethanolamine as well as the reaction temperature. The degradation reaction was conducted under nitrogen atmosphere and accelerated by catalysts such as lithium acetate, which was evidenced by lowering the degradation temperature as well as the amounts of degradation reagent. The decomposition products were completely separated into two layers. The upper liquid layer was a polyether polyol, which was characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The present glycolysis procedure allows a simple recycling of the hydroxyl terminated polyol in pure form.

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Section: Introductionmentioning

confidence: 99%

Chemical degradation of thermoplastic polyurethane for recycling polyether polyol

Wang

Chen

Chen³

et al. 2011

Fibers Polym

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“…Chemical recycling could be used to produce value-added products (such as monomers, light hydrocarbons, and/or liquid and gaseous fuels) from the hydrocarbon-based fraction of shredder residue (plastics, rubber, paper, and wood) (Sawyer 1974;PIA 1987;Curlee 1986;Braslaw and Gerlock 1984;Mahoney, Weiner, and Farris 1974;Dean, Chindgren, and Valdez 1972;Banks, Lusk, and Ottinger 1971;Huang and Dalton 1975;Tukker 1999). Plastics and rubber, however, will be the main source for such products.…”

Section: Chemical Recyclingmentioning

confidence: 99%

“…Its applicability to shredder residue has been investigated primarily for the treatment of the PUF (Braslaw and Gerlock 1984;Mahoney, Weiner, and Farris 1974;Valdez, Dean, and Bilbrey 1975). It is also applicable to the treatment of polyesters, polycarbonates, and polyamides.…”

Section: Hydrolysismentioning

confidence: 99%

“…Sendijarevic et al (2004Sendijarevic et al ( , 2005 have been developing a process for the hydrolysis of PUF that does not require different foam materials to be presorted. Mahoney, Weiner, and Farris (1974) of Ford Motor Company showed that the hydrolysis of flexible PUF produces two main products: polyols and amines. Braslaw and Gerlock (1984), also of Ford, developed a process to separate and purify the product mix to produce very high quality polyols.…”

Section: Hydrolysismentioning

confidence: 99%

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End-of-life vehicle recycling : state of the art of resource recovery from shredder residue.

Jody¹,

Daniels²,

Duranceau³

et al. 2011

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“…Hydrolysis is the reaction of PU with water, producing both polyols and amine-based products [12,49,50]. The recycled polyols can be used as a monomer in PU formation, and the amine intermediates can be re-used to produce other PU components, e.g., iso- cyanates [51][52][53]. The chemistry of a general hydrolysis process is:…”

Section: Hydrolysismentioning

confidence: 99%

Polyurethane Waste Reduction and Recycling: From Bench to Pilot Scales

Nikje

Garmarudi

Idris

2011

Designed Monomers and Polymers

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In this review, reports, patents and recently published papers and documents on polyurethane recycling, especially chemical recycling methods, are investigated in order to find an adequate method for waste reduction, protecting the environment and preventing waste land filling. The recycling of polyurethane has always posed unique challenges due to its wide variety of applications, from the industry to bio-based materials, namely, artificial organs. Mechanical regrinding is the oldest method in polyurethane waste recycling and the use of the regrind wastes as filler in the new formulations. Chemical recycling of polyurethanes by hydrolysis, aminolysis and glycolysis is for the most part considered economically uncompetitive compared to formulating with virgin raw materials. Also some thermochemical processes are utilized for PU recycling. Recycling has opened an effective and economic route for polyurethane waste treatment. Nonetheless, more research efforts are required in order to scale up the recycling methods.

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Hydrolysis of polyurethane foam waste

Cited by 56 publications

References 2 publications

Chemical degradation of thermoplastic polyurethane for recycling polyether polyol

Chemical degradation of thermoplastic polyurethane for recycling polyether polyol

End-of-life vehicle recycling : state of the art of resource recovery from shredder residue.

Polyurethane Waste Reduction and Recycling: From Bench to Pilot Scales

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