The present invention relates to a process for the reuse in polymerization of a biodegradable polymeric composition re) comprising a mixture of polyesters. The process comprises the steps of: 1) reacting said polymeric composition with water at a temperature higher than the melting temperature of at least one of said polyesters, obtaining a depolymerization product comprising monomers of said polyesters and/or their oligomers in a mixture, 2) separating from said depolymerization product a fraction comprising impurities and/or fillers, 3) subjecting said monomers and/or oligomers to polymerization, in quantities from 1% to 100% by weight, with respect to the mixture subjected to polymerization, obtaining a polymeric composition biodegradable. Further objects of the invention are the polymers obtained by means of said reuse process, the biodegradable polymeric compositions that comprise said polymers and the biodegradable articles obtained from said composition

The present invention relates to a process for the reuse in polymerization of a biodegradable polymeric composition re) comprising a mixture of polyesters. The process comprises the steps of: 1) reacting said polymeric composition with water at a temperature higher than the melting temperature of at least one of said polyesters, obtaining a depolymerization product comprising monomers of said polyesters and/or their oligomers in a mixture, 2) separating from said depolymerization product a fraction comprising impurities and/or fillers, 3) subjecting said monomers and/or oligomers to polymerization, in quantities from 1% to 100% by weight, with respect to the mixture subjected to polymerization, obtaining a polymeric composition biodegradable. Further objects of the invention are the polymers obtained by means of said reuse process, the biodegradable polymeric compositions that comprise said polymers and the biodegradable articles obtained from said composition

An embodiment provides a method for recycling tires, including: injecting, using a pump, a rubber material into a dissociating system, wherein the pump exerts a mechanical force upon the rubber material to reduce a size of the rubber material; within the dissociating system, creating a rubber material mixture, by: injecting a supercritical fluid to be mixed with the rubber material; heating, using a heat source, the rubber material mixture; and atomizing the rubber material mixture; and sending the resulting atomized rubber material mixture to a separating system to separate the rubber material mixture into different components. Other aspects are described and claimed.

An embodiment provides a method for recycling tires, including: injecting, using a pump, a rubber material into a dissociating system, wherein the pump exerts a mechanical force upon the rubber material to reduce a size of the rubber material; within the dissociating system, creating a rubber material mixture, by: injecting a supercritical fluid to be mixed with the rubber material; heating, using a heat source, the rubber material mixture; and atomizing the rubber material mixture; and sending the resulting atomized rubber material mixture to a separating system to separate the rubber material mixture into different components. Other aspects are described and claimed.

The present invention relates to a process for the production of ethylene-based polymers from waste plastics feedstocks comprising the steps in this order of: (a) providing a hydrocarbon stream A obtained by hydrotreatment of a pyrolysis oil produced from a waste plastics feedstock; (b) optionally providing a hydrocarbon stream B; (c) supplying a feed C comprising a fraction of the hydrocarbon stream A and optionally a fraction of the hydrocarbon stream B to a thermal cracker furnace comprising cracking coil(s); (d) performing a thermal cracking operation in the presence of steam to obtain a cracked hydrocarbon stream D; (e) supplying the cracked hydrocarbon stream D to a separation unit; (f) performing a separation operation in the separation unit to obtain a product stream E comprising ethylene; (g) supplying the product stream E to a polymerisation reactor; and (h) performing a polymerisation reaction in the polymerisation reactor to obtain an ethylene-based polymer; wherein in step (d): • ⋅ the coil outlet temperature is 2: 800 and; 870° C., preferably 2: 820 and; 870° C.; and • ⋅ the weight ratio of steam to feed C is >0.3 and <0.8.

The present invention relates to a process for the production of ethylene-based polymers from waste plastics feedstocks comprising the steps in this order of: (a) providing a hydrocarbon stream A obtained by hydrotreatment of a pyrolysis oil produced from a waste plastics feedstock; (b) optionally providing a hydrocarbon stream B; (c) supplying a feed C comprising a fraction of the hydrocarbon stream A and optionally a fraction of the hydrocarbon stream B to a thermal cracker furnace comprising cracking coil(s); (d) performing a thermal cracking operation in the presence of steam to obtain a cracked hydrocarbon stream D; (e) supplying the cracked hydrocarbon stream D to a separation unit; (f) performing a separation operation in the separation unit to obtain a product stream E comprising ethylene; (g) supplying the product stream E to a polymerisation reactor; and (h) performing a polymerisation reaction in the polymerisation reactor to obtain an ethylene-based polymer; wherein in step (d): • ⋅ the coil outlet temperature is 2: 800 and; 870° C., preferably 2: 820 and; 870° C.; and • ⋅ the weight ratio of steam to feed C is >0.3 and <0.8.

A method for recycling textiles comprising cellulose with the following steps of: optionally disintegrating the textile, swelling the cellulose, under reducing conditions, wherein at least one reducing agent is present at least during a part of the swelling, and then performing at least one of the following two bleaching steps in any order: i) bleaching the material with oxygen at alkaline conditions with a pH in the range 9-13.5, and ii) bleaching the material with ozone at acid conditions below pH 6. An advantage is that the yield is improved at the same time as excellent decolourization is achieved. If the recycled material is used in viscose manufacture, the risk of clogging nozzles and so on is reduced.

This invention relates to the field of contaminated plastic waste decomposition. More specifically, the invention comprises methods and systems to decompose contaminated plastic waste and transform it into value-added products.

Poly(acrylic acid)-based superabsorbent polymer (SAP) in a feed stream is converted into poly(acrylic acid) (PAA) in a hydrothermal treatment (HTT) reactor. The total energy used to degrade the SAP into PAA is less than about 50 MJ/kg SAP.

Poly(acrylic acid)-based superabsorbent polymer (SAP) in a feed stream is converted into poly(acrylic acid) (PAA) in a hydrothermal treatment (HTT) reactor. The total energy used to degrade the SAP into PAA is less than about 50 MJ/kg SAP.