The present disclosure relates to the recovery of an alkoxide catalyst used in a process depolymerizing a polyester to form a diacid or diester and a diol. The present disclosure also relates to the recovery of an alkoxide catalyst used in a process depolymerizing polyethylene terephthalate to form dimethyl terephthalate and mono ethylene glycol.

The present disclosure relates to polymer compositions, articles formed from polymer compositions, methods of making polymer compositions, and methods of making articles including polymer compositions. In at least one embodiment, a composition includes: (1) an ethylene polymer, (2) a vinyl alcohol polymer or a polyamide, and (3) a polar polymer or a grafted polyolefin. A composition of the present disclosure may further include a polypropylene polymer. A polar polymer may be an ethylene-acrylic-acid-copolymer, ethylene acrylate copolymer, a polyvinyl acetate, or combination(s) thereof. In at least one embodiment, a film includes a composition having: (1) an ethylene polymer, (2) a vinyl alcohol polymer or a polyamide, and (3) a polar polymer or a grafted polyolefin.

In a pretreatment method, in a first step, a sample is dissolved in 1,1,1,3,3,3-hexafluoro-2-propanol to prepare a first solution. In a second step, an organic base that has a lower boiling point than that of HFIP is added to the first solution to prepare a second solution. In a third step, the second solution is heated to obtain a substance in which an anhydrous oxide structure in the sample has been decomposed. In a fourth step, chloroform is added to the second solution to prepare a third solution.

Disclosed herein is a process to convert PVC plastic into a dechlorinated polymer, such as high density polyethylene, while substantially avoiding carbonization. The process also facilitates Cl recovery and/or reintroducing the dechlorinated plastic into product streams. In some embodiments, the process comprises heating a mixture of PVC and a catalyst and/or a base in a solvent, optionally in the presence of hydrogen gas.

A multilayer thermoplastic article blended with hydrolytically unstable polymers and a material component for improved recyclability. The multilayer thermoplastic article having an inner layer being made of a thermoplastic material, an outer layer being made of a thermoplastic material, and an intermediate layer disposed between the inner layer and the outer layer. The intermediate layer is made of a blended material comprising 50 to 99 wt. % of a hydrolytically unstable polymer and 1 to 50 wt. % of the material component selected from the group consisting of an oxygen scavenger, an oxidizable organic polymer, a passive barrier material, Iron, Ascorbic Acid, and potassium sulfite.

Disclosed herein is a hermetically sealed flow-through reactor for non-oxidative thermal degradation of a rubber containing waste into a char product, the reactor having an internal cylindrical surface, and the reactor including: an inlet and an outlet; one or more thermal reaction zones arranged between the inlet and the outlet, wherein each thermal reaction zone is provided with: one or more heating elements controllable to heat the thermal reaction zone to an operating temperature for mediating the non-oxidative thermal degradation of rubber in the rubber containing waste, and one or more gas outlets for withdrawing gas or gases evolved during the non-oxidative thermal degradation of the rubber; and a screw auger located within the reactor, the screw augur configured to rotate in both the forward and reverse directions to agitate and transport the rubber containing waste through the one or more thermal reaction zones in both the forward and reverse directions and to the outlet, wherein flighting on the screw auger tracks the internal cylindrical surface of the reactor in close relationship to minimise or prevent the transport of material through a clearance space between outer edges of the flighting and the internal cylindrical surface of the reactor.

A process for the non-oxidative thermal degradation of a rubber containing waste including: transporting the rubber containing waste along a horizontal axis of a hermetically sealed cylindrical reactor including: an inlet and an outlet, one or more thermal reaction zones arranged between the inlet and the outlet, wherein each thermal reaction zone is provided with: one or more heating elements controllable to heat the thermal reaction zone to an operating temperature for mediating the non-oxidative thermal degradation of rubber in the rubber containing waste, and one or more gas outlets for withdrawing volatile gas or gases evolved during the non-oxidative thermal degradation of the rubber; and a screw auger located within the reactor, the screw augur configured to rotate in both the forward and reverse directions to agitate and transport the rubber containing waste through the one or more thermal reaction zones in both the forward and reverse directions and to the outlet; heating the rubber containing waste, in the one or more thermal treatment zones, to a temperature above the degradation temperature of rubber for a time sufficient to produce the volatile gas or gases and the char product; operating the screw auger in both the forward and reverse directions to agitate the rubber containing waste within the reactor; and advancing the rubber containing waste along the horizontal axis to the outlet.

The invention relates to a method for stabilizing halogen-free thermoplastic recyclates or pre-damaged plastics against oxidative, thermal, and/or actinic degradation. In the method according to the invention, at least one alditol or cyclitol is introduced into a halogen-free thermoplastic recyclate as a component, and optionally in addition thereto, at least one primary antioxidant and/or at least one secondary antioxidant is introduced into a halogen-free thermoplastic recyclate. By virtue of the method according to the invention, plastic recyclates can be stabilized against oxidative, thermal, and/or actinic degradation with a high degree of effectiveness and in a very environmentally friendly and inexpensive manner. The invention additionally relates to corresponding recyclate-based plastic compositions, to molding compound and molded parts produced therefrom, to stabilizer compositions, and to the use thereof for stabilizing halogen-free thermoplastic recyclates against oxidative, thermal, and/or actinic degradation.

The invention discloses a technology for recovery, regeneration and reuse of soluble textiles. The technology comprises the steps of: the dissolution-controlled soluble polyester fibres are processed into soluble apparel accessories through conventional weaving, dyeing, finishing and tailoring or injection molding; the apparels or the soluble apparel accessories are dissolved under a certain condition, on one hand, the dissolving solution is filtered and solutes are recovered to obtain a high purity of terephthalic acid and ethylene glycol, which are reused to the polymerization of the soluble polyester, and the slices of the soluble polyester are obtained to be re-spun into the soluble fibres for reuse; on the other hand, the incompact and undissolved textiles are treated into an incompact fibre aggregation with good qualities by processes including disinfection, decolourization or redyeing, which are processed into high-quality textile fibres for reuse after drying or softly carding.

The present invention relates to a composite material obtained by in situ polymerization of a thermoplastic resin with a fibrous material. More particularly the present invention relates to a polymeric composite material obtained by in-situ polymerization of a thermoplastic (meth)acrylic resin and a fibrous material containing long fibers and its use, a process for making such a composite material and manufactured mechanical or structured part or article comprising this polymeric composite material.