Lg Chem, Ltd

Sk Innovation Co., Ltd.

Sk Geo Centric Co., Ltd.

Sanghwan Jo

Joong Jin Han

Hansol Kim

Sookil Kang

Jaeheum Jung

Eunju Park

Sangick Lee

Jeongbin Lee

Howon Lee

Provided is a method for removing chlorine from a waste plastic. The method includes a) reacting a waste plastic with a neutralizing agent; and b) reacting the product of step a) with a copper compound. 95% by weight or more of chlorine is removed based on the total weight of the waste plastic.

Method for removing chlorine from pyrolysis process of waste plastic

Provided is a pyrolysis method of waste plastics including the steps of inputting waste plastics to a batch reactor and performing heating to produce a waste plastic melt at a first temperature; heating the waste plastic melt to remove chlorine from the melt at a second temperature; and heating the waste plastic melt from which chlorine has been removed to produce a pyrolysate at a third temperature. The batch reactor is sequentially heated in a direction from a raw material inlet to a reaction product outlet so that the temperature is raised from the first temperature to the third temperature.

Pyrolysis method of waste plastics using batch reactor

There is provided a method and an apparatus for efficiently recovering an amide-based compound such as N-methyl-2-pyrrolidone from an aqueous solution containing an amide-based compound such as N-methyl-2-pyrrolidone.

Method and apparatus for recovering amide-based compound

The present disclosure relates to a method of more efficiently separating and purifying a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.

Separation and purification method of polyarylene sulfide

The present disclosure relates to a method of more efficiently separating and recovering a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.

Separation and recovery method of polyarlene sulfide

A preparation method of a polyarylene sulfide that may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.

Preparation method 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.

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Daejeon, South Korea

Sanghwan Jo