A system and method for a first reactor to produce a transfer slurry having a first polyolefin polymerized in the first reactor, a heat-removal zone to remove heat from the transfer slurry, and a second reactor to receive the transfer slurry cooled by the heat-removal zone, the second reactor to produce a product slurry having a product polyolefin which includes the first polyolefin and a second polyolefin polymerized in the second reactor.

A system and method for a first reactor to produce a transfer slurry having a first polyolefin polymerized in the first reactor, a heat-removal zone to remove heat from the transfer slurry, and a second reactor to receive the transfer slurry cooled by the heat-removal zone, the second reactor to produce a product slurry having a product polyolefin which includes the first polyolefin and a second polyolefin polymerized in the second reactor.

Process for the removal of volatile compounds from a tackifier comprising a resin with repeating units of formula I wherein R.sup.1 is a linear or branched alkylen group with 1 to 10 carbon atoms and R.sup.2 is a linear or branched, saturated or unsaturated N aliphatic hydrocarbon group with up to 20 carbon atoms, and optionally a plasticizer, wherein the tackifier is passed through at least one evaporator as film and the volatile compounds are removed from the film.

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The present invention is in related to a method for recycling a waste polyester material, more particularly to a method for recycling the waste polyester material through a chemical way to produce DMT. It belongs to the technical field of recycling and utilization of waste polyester materials. The present invention adopts the technology of continuous feeding and continuous alcoholysis, so that the material undergoes homogeneous alcoholysis in a melting state, and the required alcoholysis time is short. Two or more alcoholysis tanks are used in series for continuous alcoholysis. The product quality is stable. At the same time, due to the optimization of the amount of EG in the alcoholysis process, distillation and concentration are not required after the alcoholysis step is completed. The alcoholysis product is directly entered into the transesterification tank for the transesterification reaction, and pure DMT products can then be generated.

The present invention is in related to a method for recycling a waste polyester material, more particularly to a method for recycling the waste polyester material through a chemical way to produce DMT. It belongs to the technical field of recycling and utilization of waste polyester materials. The present invention adopts the technology of continuous feeding and continuous alcoholysis, so that the material undergoes homogeneous alcoholysis in a melting state, and the required alcoholysis time is short. Two or more alcoholysis tanks are used in series for continuous alcoholysis. The product quality is stable. At the same time, due to the optimization of the amount of EG in the alcoholysis process, distillation and concentration are not required after the alcoholysis step is completed. The alcoholysis product is directly entered into the transesterification tank for the transesterification reaction, and pure DMT products can then be generated.

There is provided a method for efficiently recovering amide-based compounds such as N-methyl-2-pyrrolidone from a waste liquid containing amide-based compounds such as N-methyl-2-pyrrolidone generated, for example, in a production process of polyarylene sulfide.

There is provided a method for efficiently recovering amide-based compounds such as N-methyl-2-pyrrolidone from a waste liquid containing amide-based compounds such as N-methyl-2-pyrrolidone generated, for example, in a production process of polyarylene sulfide.

Polyester-free cotton is obtained from a fabric and/or fibers containing polyester and cotton by reacting the fabric and/or fibers with an amine organocatalyst and/or carboxylic acid salt of same and an alcohol solvent. The reaction, which may be run in batches or as a continuous flow process, recovers (i) polyester-free cotton as a solid inert by-product of the reaction, (ii) the amine organocatalyst and/or carboxylic acid salt of same for reuse, (iii) a polyester monomer product, and (iv) unreacted alcohol. The reaction works on any polyester-cotton fabric and/or fibers, including those that have at least one additional material, such as polyethers polyolefins, polyurethanes, nylon, rayon, acetate, viscose, modal, acrylic, wool, and combinations thereof.

Polyester-free cotton is obtained from a fabric and/or fibers containing polyester and cotton by reacting the fabric and/or fibers with an amine organocatalyst and/or carboxylic acid salt of same and an alcohol solvent. The reaction, which may be run in batches or as a continuous flow process, recovers (i) polyester-free cotton as a solid inert by-product of the reaction, (ii) the amine organocatalyst and/or carboxylic acid salt of same for reuse, (iii) a polyester monomer product, and (iv) unreacted alcohol. The reaction works on any polyester-cotton fabric and/or fibers, including those that have at least one additional material, such as polyethers polyolefins, polyurethanes, nylon, rayon, acetate, viscose, modal, acrylic, wool, and combinations thereof.

Modified thermoplastic hydrocarbon thermoplastic resins are provided, as well as methods of their manufacture and uses thereof in rubber compositions. The modified thermoplastic resins are modified by decreasing the relative quantity of the dimer, trimer, tetramer, and pentamer oligomers as compared to the corresponding unmodified thermoplastic resin polymers, resulting in a product that exhibits a greater shift in the glass transition temperature of the elastomer(s) used in tire formulations. This translates to better viscoelastic predictors of tire tread performance, such as wet grip and rolling resistance. The modified thermoplastic resins impart remarkable properties on various rubber compositions, such as tires, belts, hoses, brakes, and the like. Automobile tires incorporating the modified thermoplastic resins are shown to possess excellent results in balancing the properties of rolling resistance, tire wear, snow performance, and wet braking performance.