Yuseong gu, South Korea
Yuseong gu, South Korea

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Patent
Lotte Chemical Corporation | Date: 2016-09-14

The present disclosure relate to a method for operating a redox flow battery, which includes the steps of discharging the redox flow battery having an anode electrolyte and a cathode electrolyte when a volume difference between the anode electrolyte and the cathode electrolyte is within 20 % of a total volume of the anode electrolyte and the cathode electrolyte, while maintaining an open circuit voltage of lower than 1.3 V/cell, and moving the anode electrolyte and/or the cathode electrolyte so that the volume difference is 2 % or less between the anode electrolyte and the cathode electrolyte in the redox flow battery after the discharging.


Patent
Lotte Chemical Corporation | Date: 2016-06-15

The present invention relates to an air diffuser including an air diffusing pipe in which at least two pore groups including two or more pores are formed, and a membrane bioreactor including the same.


Provided is an aliphatic polycarbonate-co-aromatic polyester with long-chain branches. The copolymer includes repeating units represented by -OAO- and Z(O-)_(a), which are linked via carbonyl (-C(O)-) and -C(O)YC(O)- as linkers. Also provided is an aliphatic copolycarbonate including repeating units represented by -OAO- and Z(O-)_(a), which are linked via carbonyl (-C(O)-) linkers. The aliphatic copolycarbonate has a weight average molecular weight of 30,000 or more.


Provided is an aliphatic polycarbonate macropolyol including -OAO- and Z(O-)_(a) as repeating units. In the aliphatic polycarbonate macropolyol, the repeating units - OAO- and Z(O-)_(a) are linked to each other via carbonyl (-C(O)-) linkers or are bonded to hydrogen to form terminal -OH groups. The number of moles of the terminal -OH groups is from aZ to aZ+0.2Z (where Z represents the number of moles of the repeating unit Z(O-)_(a)). Further provided is an aliphatic polycarbonate-co-aromatic polyester macropolyol including -OAO- and Z(O-)_(a) as repeating units. In the aliphatic polycarbonate-co-aromatic polyester macropolyol, the repeating units -OAO- and Z(O-)_(a) are linked via carbonyl (-C(O)-) and -C(O)YC(O)- as linkers or are bonded to hydrogen to form terminal -OH groups.


Disclosed are a polycarbonate resin composition as a polycarbonate material for medical use having yellowing resistant property with respect to the irradiation of gamma-radiation, which exhibits extremely little yellowing during sterilizing using the gamma-radiation, maintains transparency and has no mechanical change, and a molded article using the same. The present invention provides a polycarbonate resin composition including a polycarbonate resin, a thioether-based stabilizer and an amide-based stabilizer, and a molded article using the same.


Patent
Lotte Chemical Corporation | Date: 2016-04-28

The present invention relates to a preparing method of a polyolefin resin mono chip including: forming a thermoplastic resin composite by impregnating a fiber reinforcing agent having a length of 5 mm to 20 mm into a molten mixture including a propylene homopolymer of which a molecular weight distribution is 3 to 6, and a colorant, wherein a cooling speed at room temperature of the thermoplastic resin composite is 19 C./min or more. In addition, the present invention relates to a polyolefin resin mono chip including: a thermoplastic resin composite including a polymer substrate including a propylene homopolymer of which a molecular weight distribution is 3 to 6, and a colorant; and a fiber reinforcing agent having a length of 5 mm to 20 mm and impregnated into the polymer substrate, wherein an impact strength measured according to ASTM D256 is 200 J/m or more.


Provided are a polyurethane resin composition for a hollow fiber membrane potting agent, and a hollow fiber membrane module, and more particularly, a polyurethane resin composition for a hollow fiber membrane potting agent, which includes a polyurethane resin and a hydrophilic additive to have excellent resistance to internal/external pressure, and also to have excellent sealing performance, antifouling property, etc., and a hollow fiber membrane module including a cured product thereof.


Patent
Lotte Chemical Corporation | Date: 2016-03-30

The present invention relates to a method for separating aromatic compounds contained in naphtha which includes an extraction step of contacting specific ionic liquids and naphtha and a step of separating the aromatic compounds from naphtha contacted with the ionic liquids.


Patent
Lotte Chemical Corporation | Date: 2016-11-16

The present invention relates to a preparing method of a polyolefin resin mono chip including: forming a thermoplastic resin composite by impregnating a fiber reinforcing agent having a length of 5 mm to 20 mm into a molten mixture including a propylene homopolymer of which a molecular weight distribution is 3 to 6, and a colorant, wherein a cooling speed at room temperature of the thermoplastic resin composite is 19C /min or more. In addition, the present invention relates to a polyolefin resin mono chip including: a thermoplastic resin composite including a polymer substrate including a propylene homopolymer of which a molecular weight distribution is 3 to 6, and a colorant; and a fiber reinforcing agent having a length of 5 mm to 20 mm and impregnated into the polymer substrate, wherein an impact strength measured according to ASTM D256 is 200 J/m or more.


Provided are an ethanol dehydration catalyst having a high ethylene yield even at a low temperature region, as an ethanol dehydration catalyst for converting a feedstock including anhydrous ethanol or hydrous ethanol to ethylene, and a method of preparing ethylene by using the same. In the ethanol dehydration catalyst for converting a feedstock including anhydrous ethanol or hydrous ethanol to ethylene of the present invention, the catalyst includes 0.1 wt% to 0.5 wt% of lanthanum (La) or 0.05 wt% to 1 wt% of gallium (Ga) in ZSM-5.

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