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公开(公告)号：US11370730B2
公开(公告)日：2022-06-28
申请号：US16771141
申请日：2019-02-01
申请人： LG CHEM, LTD.
发明人： Hyunseok Nam , Jun Han Kang , Kyong Yong Cha , Jaewon Jeong , Dong Hyun Ko , Jun Kyu Han , Sang Jin Han , Kyung Moo Lee , Joohyuck Lee , Daeheung Choi , Myungji Suh , Ye Seul Hwang , Sunhwan Hwang , Seongmin Kim
摘要： The present specification provides a method for preparing 1,3-butadiene, the method comprising: (A) obtaining a first product comprising a light component, 1,3-butadiene, and a heavy component from a reactant comprising butene; (B) separating the heavy component from a second product comprising the 1,3-butadiene and the light component by condensing the heavy component after heat exchanging the first product; and (C) separating concentrated heavy component by reboiling the condensed heavy component.
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公开(公告)号：US10927223B2
公开(公告)日：2021-02-23
申请号：US16811449
申请日：2020-03-06
申请人： LG Chem, Ltd.
发明人： Dae Woo Nam , Kyung Moo Lee , Jae Hong Lee , Chang Sun Han
摘要： The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 μm or less, and a base resin having a particle size of 150 μm or more and 850 μm or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 μm or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
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公开(公告)号：US20180237593A1
公开(公告)日：2018-08-23
申请号：US15751049
申请日：2016-09-27
申请人： LG Chem, Ltd.
发明人： Dae Woo Nam , Kyung Moo Lee , Jae Hong Lee , Chang Sun Han
CPC分类号： C08J3/075 , A61L15/60 , C08J3/12 , C08J3/24 , C08J2357/10 , C08K3/36 , C08K2201/005
摘要： The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 μm or less, and a base resin having a particle size of 150 μm or more and 850 μm or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 μm or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
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公开(公告)号：US20200207929A1
公开(公告)日：2020-07-02
申请号：US16811449
申请日：2020-03-06
申请人： LG Chem, Ltd.
发明人： Dae Woo Nam , Kyung Moo Lee , Jae Hong Lee , Chang Sun Han
摘要： The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 μm or less, and a base resin having a particle size of 150 μm or more and 850 μm or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 μm or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
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公开(公告)号：US11420924B2
公开(公告)日：2022-08-23
申请号：US16976049
申请日：2019-10-04
申请人： LG CHEM, LTD.
发明人： Hyun Nam , Kyung Moo Lee , Yukyung Lim
摘要： Provided is a method for purifying organic acids, including: a first extraction which includes separating an aqueous solution of organic acids into a first organic layer and a first aqueous solution layer by adding a solvent containing an amine and an alcohol; removing the alcohol from the separated first organic layer; and a second extraction which includes separating the first organic layer from which the alcohol has been removed into a second organic layer and a second aqueous solution layer by adding water.
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公开(公告)号：US11084771B2
公开(公告)日：2021-08-10
申请号：US15778584
申请日：2018-01-11
申请人： LG CHEM, LTD.
发明人： Hyun Nam , Young Ho Lee , Ki Yong Yoon , Jun Hyuk Lim , Kyung Moo Lee
摘要： The present invention relates to a method for purifying phenol, which comprises: contacting a phenol stream comprising hydroxyacetone, 2-methylbenzofuran, 3-methylbenzofuran and phenol with an acyl chloride in the presence of an organic sulfonic acid to convert one or more selected from the group consisting of hydroxyacetone, 2-methylbenzofuran and 3-methylbenzofuran into a high boiling point compound having a boiling point higher than that of the phenol; and recovering the high boiling point compound from the phenol stream.
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公开(公告)号：US10662296B2
公开(公告)日：2020-05-26
申请号：US15751049
申请日：2016-09-27
申请人： LG Chem, Ltd.
发明人： Dae Woo Nam , Kyung Moo Lee , Jae Hong Lee , Chang Sun Han
摘要： The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 μm or less, and a base resin having a particle size of 150 μm or more and 850 μm or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 μm or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
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