Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hansol Kim

Joong Jin Han

Hyun Woog Ryu

Eunju Park

Kwonsu Jung

Sanghwan Jo

Yong Jin Jang

Jong Hyun Chae

Daeil Kim

Lyang Wook Jo

An apparatus for diagnosing a main relay that controls connection between a battery pack and a load may comprise a resistor dividing circuit including a plurality of resistors, wherein the resistor dividing circuit is connected between a first main relay connected to a positive terminal of the battery pack and the load and between a first end of a second main relay connected to a negative terminal of the battery pack and a second end of the second main relay, and a diagnosing module connected to the resistor dividing circuit and a voltage source and outputting a relay diagnosis voltage to be used for diagnosing the first main relay and the second main relay.

Relay diagnosis device and relay diagnosis method

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

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by using a dihalogenated aromatic compound in a predetermined equivalent ratio with respect to a sulfur compound and performing both dehydration and polymerization under optimum conditions.

Preparation method of polyarylene sulfide

The present invention provides a polyarylene sulfide resin composition comprising a mixture of polyarylene sulfide and a binder resin having excellent electrical conductivity and high temperature stability.

Conductive polyarylene sulfide resin composition

According to the present invention, an alkali metal salt such as NaCl which is a major by-product of polyarylene sulfide polymerization may be recycled in the dehydration reaction for the preparation of a sulfur source, thereby providing a method of preparing a polyarylene sulfide with a high yield in an economical manner.

Method of preparing 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.

Process for recovering amide compounds

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by adding an aliphatic amino acid hydrochloride in addition to existing materials for dehydration.

The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by adding an acidic compound in addition to existing materials for dehydration.

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Daejeon, South Korea

Hansol Kim