Lg Chem, Ltd

Chong Kyu Shin

Young Jun Hong

Houng Sik Yoo

Jin Young Ryu

Eun Joo Choi

Hak Shin Kim

Youngju Lee

Byoungsoo Lee

Hyungjoon Jeon

Joong Jin Han

Youngjea Kim

Hyungsam Choi

Bong Keun Lee

Eunkyoung Byun

Byungho Jeon

Phill Lee

Seong Ho Choi

Jeong Min Kim

Ayoung Lee

Eun Ju Kim

Keun Won Song

Seungpyo Jeong

Bong Ju Kwak

Lakwon Choi

Esder Kang

Yong Su Park

Taehyeong Kim

Hyejin Kwon

Sora Bang

Jae Hyuk Chang

Hyuin Ryu

Hyungbae Gil

Hyelim Kang

Jong-Chan Lee

Tae Geun Noh

Kwon Nam Sohn

Young Ji Tae

Sikwon Moon

Dae Hun Kim

Kyunghoon Min

Dong Pyo Kim

Byungguk Kim

Sung Kyung Park

Youngsik Eom

Jung Hye Won

Yun Seok Choe

Sanggon Kim

Hyung Joon Jeon

Bumjoo Kim

Young Jun Shin

Joungeun Yoo

Min-Jong Lee

Sergey Ulyakhin

Lan Young Hong

Sungyeol Choi

Yeji Kim

Danbi Han

Ja Min Hong

Eun Woo Cho

Jinkuk Lee

Young Jun Shi

Provided is a composition for interfacially polymerizing polyamide including an amine compound and a chain-type-structured additive containing one or more amino groups and two or more hydroxyl groups, and a method for manufacturing a water treatment separation membrane, and a water treatment separation membrane using the same.

Composition for polyamide interfacial polymerization, and method for manufacturing water treatment separation membrane by using same

Provided is a method for detecting defects of a separation membrane element, and an apparatus for detecting defects of a separation membrane element.

Method of detecting defects in separation membrane element and apparatus for detecting defects in separation membrane element

Provided is a method for manufacturing a water-treatment membrane, the method including bringing an aqueous solution including free chlorine and a halogen ion into contact with a polyamide active layer, wherein the free chlorine is present in an amount from 150 ppm to 400 ppm and the halogen ion is present in an amount from 150 ppm to 400 ppm based on the aqueous solution, and a water-treatment membrane manufactured using the same.

Method for preparation of water-treatment separation membrane and water-treatment separation membrane prepared thereby

Provided is a reverse osmosis membrane comprising: a support layer comprising a support and a polysulfone layer; and an active layer, wherein a compression modulus is from 20 MPa to 40 MPa, to a method for manufacturing the same, and a water-treatment module.

Reverse osmosis membrane, manufacturing method therefor, and water treatment module

Provided is a composition for interfacial polymerizing polyamide including an amine compound; and one or more types of compounds selected from among a purine-based compound and a pyrimidine-based compound of Chemical Formula 1:

Composition for interfacial polymerization of polyamide and manufacturing method for water treatment separation membrane using same

The present specification provides a composition comprising a material of Chemical Formula 1: having a molecular weight of 500,000 to 700,000 where R1 and R2 are the same as or different from each other, and each independently is hydrogen, deuterium, or an alkyl group, and n is from 10,000 to 20,000, for forming a reverse osmosis membrane protective layer, a method for preparing a reverse osmosis membrane using the same, a reverse osmosis membrane and a water-treatment module.

Composition for forming reverse osmosis membrane protection layer, method for preparing reverse osmosis membrane using same, reverse osmosis membrane, and water treatment module

Provided is a water-treatment membrane including a porous support; and a polyamide active layer including chlorine on a surface thereof, wherein CIE L*a*b* color coordinate values after storing for 30 days or longer at 25&#xb0; C. to 80&#xb0; C. satisfy Equation 1 to Equation 3:91&#x3c;*&#x3c;97&#x2003;&#x2003;&#x3c;Equation 1&#x3e;&#x2212;1.5&#x3c;*&#x3c;1.5&#x2003;&#x2003;&#x3c;Equation 2&#x3e;&#x2212;1.5&#x3c;*&#x3c;8&#x2003;&#x2003;&#x3c;Equation 3&#x3e; of the present disclosure, a water-treatment module including the same, and a method for manufacturing the same.

Water treatment separation membrane, water treatment module comprising same, and manufacturing method therefor

Provided is a feed spacer having a three-layer structure, in which a set forming the feed spacer is formed in a three-layer structure, so that the set, which is in contact with a reverse osmosis membrane, convects raw water to a center of the structure of the feed spacer and a laminar flow velocity gradient is generated at the center to decrease a polarization phenomenon of a reverse osmosis filter module and minimize pressure loss, and a reverse osmosis membrane filter module including the feed spacer.

Feed spacer having three-layered structure, and reverse osmosis membrane filter module including same

Provided is a method for preparing a gas separation membrane, the method including forming a porous layer by coating a hydrophilic polymer solution on a porous substrate; and forming an active layer by coating a composition for forming an active layer including a polymer of Chemical Formula 1 on the porous layer, 

Method for manufacturing gas separation membrane and gas separation membrane manufactured thereby

Provided is a method for producing a composition for forming a gas separation membrane active layer, the method including: obtaining a first reactant by allowing a cellulose-based compound and an acid substituted with fluorine to react; and adding dropwise an acid anhydride substituted with fluorine to the first reactant at a temperature higher than room temperature. Also provided is a composition for forming a gas separation membrane active layer.

Method for producing composition for forming gas separation membrane active layer, composition for forming gas separation membrane active layer produced by same, method for manufacturing gas separation membrane, and gas separation membrane

Provided is a water treatment membrane including: a porous support; and a polyamide active layer provided on the porous support, in which the polyamide active layer includes one or more units selected from among a unit of Chemical Formula 1: a unit of Chemical Formula 2; a unit of Chemical Formula 3; and a unit of Chemical Formula 4; and a manufacturing method thereof.

Water treatment membrane and method for manufacturing same

The present application relates to a polymer, a method for manufacturing the same, and an electrolyte membrane including the same.

Polymer, method for manufacturing same, and electrolyte membrane comprising same

The present specification provides a method for manufacturing a water-treatment separation membrane, the method comprising: preparing a porous support; forming a polyamide active layer on the porous support by using an interfacial polymerization of an aqueous solution comprising an amine compound and an organic solution comprising an acyl halide compound; and coating a coating solution comprising a random copolymer comprising the monomers represented by Chemical Formulae 1 to 3 onto the polyamide active layer, in which a content of the random copolymer is 0.5 wt % to 2 wt % based on a total weight of the coating solution, a water-treatment separation membrane manufactured by using the same, and a water treatment module comprising the water-treatment separation membrane.

Method for manufacturing water treatment separator, water treatment separator manufactured using same, and water treatment module comprising water treatment separator

The present specification provides a composition for interfacial polymerization of polyamide including at least one of an amine compound and an acyl halide compound; a surfactant; and a compound represented by Chemical Formula 1, and a method for preparing a reverse osmosis membrane using the same.

Composition for interfacial polymerization of polyamide and method for manufacturing reverse osmosis membrane using same

The present specification relates to a method for manufacturing a water-treatment membrane, a water-treatment membrane manufactured using the same, and a water-treatment module including the water-treatment membrane.

Water treatment membrane production method, water treatment membrane produced using same, and water treatment module comprising water treatment membrane

Growing community of inventors

Daejeon, South Korea

Chong Kyu Shin