Glycolysis of polyurethane wastes

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August undefined, 2024

WebMar 15, 2007 · Microwave assisted glycolysis of polyurethane (PU) flexible foam wastes at atmospheric pressure in “split-phase” condition is reported. Glycerin, sodium and potassium hydroxides were used as glycolysing agent and catalysts, respectively. Decomposition and dissolution of the foam was studied in different reaction condition. … WebJul 13, 2024 · Hydrolysis was the first chemical method developed to recycle polyurethane waste, especially flexible foams. It is a reaction between polyurethane waste and water, that can be liquid or in the form of steam ( Figure 4 ). The resulting compounds include polyols, amine intermediates and carbon dioxide [ 29 ]. Figure 4.

Meckel Walter Bayer 1 Publications 11 Citations Related Authors

WebJan 1, 2024 · Glycolysis is the most widely used chemical recycling method. 64 In it, polyurethane waste is reacted with diols at an elevated temperature to cleave the covalent bonds, breaking the polyurethane ... WebApr 1, 2010 · The course of waste polyurethane foam glycolysis with 1,4-butylene glycol (BDO) or polyoxyethylene glycol (PEG 300), dependently on PUR foam:glycol weight ratio and the kind of glycolysis agent ... respark foundation

Microwave Assisted “Split-phase” Glycolysis of Polyurethane …

WebJan 27, 2024 · Abstract. In this work, we explored a microwave-assisted glycolysis process to chemically recycle rigid polyurethane (PU) foam waste to obtain a single-phase product with suitable physio-chemical properties as a secondary raw material for the preparation of new rigid PU products. Such an approach was compared to a conventionally heated … WebJan 5, 2024 · The increased applications of Polyurethane (PU) materials give rise to a higher amount of wastes, which have a devastating effect on the earth in turn; therefore, … WebMar 24, 2024 · The main goal of polyurethane glycolysis is to recover the polyols used, but only limited attempts were made toward recovering the aromatic dicarbamate residues and derivates from the used ... respa prove it is a secured note

Polyurethane waste recycling; glycolysis and hydroglycolysis of …

Chemical Recycling of Polyurethane Waste via a Microwave-Assisted Gly…

WebIn this paper, glycolysis of toluenediisocyanate based water-blown polyurethane foam has been examined by high performance liquid chromatography and gel permeation … WebJul 3, 2012 · In this study, the influence of glycols on chemical structure and thermal stability of glycolysates as polyurethane intermediates were investigated. The intermediates were obtained by the glycolysis process of waste polyurethane foams in the reaction with different glycols ranging from ethylene glycol to hexane-1,6-diol. The used glycols were … respa section 8 webinarsWebThis paper reviews the main advances in the polyurethane (PU) recycling field, from laboratory and academia processes to pilot plant and industrial scale ones, including the … proud bar wsm

"WebThe complexity of the product mixture suggests problems in applying simple glycolysis to the recovery of mixed and/or contaminated polyurethane wastes. A simpler product mixture results when water and a base catalyst are added to the glycolysis reaction (hydroglycolysis). Hydroglycolysis yields TDA and polyolmore » " - Glycolysis of polyurethane wastes

Glycolysis of polyurethane wastes

Chemical Depolymerization of Polyurethane Foams via …

WebMar 14, 2024 · The preparation and characteristics of rigid polyurethane foams (RPUFs) synthesized from polyols obtained by glycolysis of post-industrial waste RPUFs have been studied. More precisely, waste rigid foams that have been chemically recycled by glycolysis in this work are industrially produced pieces for housing and bracket … WebFeb 27, 2024 · The use of polyurethanes and, therefore, the quantity of its scrap are increasing. Considering the thermoset characteristic of most polyurethanes, the most …

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Web@article{osti_5090958, title = {Polyurethane waste recycling; glycolysis and hydroglycolysis of water-blown foams}, author = {Gerlock, J and Braslaw, J and Zinbo, … WebSep 1, 2007 · The glycolysates were produced via glycolysis of waste polyurethane foam in the reaction with one of the following glycols: 1,3-propanediol, 1,5-pentanediol, and 1,6 …

WebMay 11, 2000 · Glycolysis of flexible polyurethane wastes using stannous octoate as the catalyst. C. Molero, A. Lucas, F. Romero, J. Rodríguez. Chemistry. 2009. Flexible polyurethane foam wastes can be advantageously treated by two-phase glycolysis to recover the polyols with an improved quality compared to single-phase processes. WebRapid growth of rigid waste polyurethane (WPUR) foam from refrigerators attracts the attention all over the world. In this study, glycolysis was chosen to treat WPUR from …

WebNov 1, 2014 · Request PDF On Nov 1, 2014, D. Simón and others published Glycolysis of flexible polyurethane wastes containing polymeric polyols Find, read and cite all the research you need on ResearchGate WebIn this review, glycolysis of waste polyurethane foam (PUF) materials with different glycols and catalysts, esp. metallic ones were considered, and the effect of some addnl. parameters such as the nature of glycol, catalyst, …

WebJul 20, 2024 · Rigid polyurethane foam wastes were milled by means of a blade mill to different particle sizes (5 mm, 2 mm, and 0.5 mm in diameter) prior to the glycolysis reaction. The selected glycol was fed into a 500 mL three-necked glass reactor, equipped with a stirrer that was set at 100 rpm, a thermometer, and a reflux condenser.

WebMeckel Walter is an academic researcher from Bayer. The author has contributed to research in topic(s): Polyurethane & Polyurea. The author has an hindex of 1, co-authored 1 publication(s) receiving 11 citation(s). proud awards 2022 perthWeb@article{osti_5090958, title = {Polyurethane waste recycling; glycolysis and hydroglycolysis of water-blown foams}, author = {Gerlock, J and Braslaw, J and Zinbo, M}, abstractNote = {In this paper, glycolysis of toluenediisocyanate based water-blown polyurethane foam has been examined by high performance liquid chromatography and … respark the romanceWebNov 20, 2024 · Glycolysis of polyurethane is a process of chemical depolymerization based on the reaction of transesterification of polyols and glycols in a molecule of urethane. This process makes it possible to destroy the polyurethane matrix and either to release polyol or to generate new recycled polyol. ... “Polyurethane waste reduction and … proud baseball mom flower svgWebNov 1, 2014 · In Fig. 1 the Peak I of the upper phase of the 25HD foam glycolysis corresponds with a molecular weight of 27,050 g/mol and it is assignable to styrene – … respa small servicer exemptionWebDec 30, 2009 · The polyurethane (PU) intermediates were obtained by glycolysis of waste PU foam in the reaction with 1,6-hexamethylene glycol (HDO). The effects of different weight ratios of HDO to PUR foam on selected physicochemical properties were also determined. proud basehor boy celebrates 100th birthdayWebApr 2, 2012 · The practical application of the glycolysis mixture of polyurethane wastes is reported. It was found that in the presence of 4,4′-diphenylmethane diisocyanate (MDI) both the separated upper phase of the glycolysis mixture and the complete two-phase reaction mixture could be used as components of the urethane adhesive mixtures for bonding … proud battlin miners facebookWebNov 20, 2024 · Glycolysis of polyurethane is a process of chemical depolymerization based on the reaction of transesterification of polyols and glycols in a molecule of … proud bar weston super mare