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公开(公告)号：US10918968B2
公开(公告)日：2021-02-16
申请号：US16068041
申请日：2017-09-06
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , Sung Kyu Lee , Sung Kyun Kim , Joon Ho Shin , Yeon Uk Choo
摘要： The present application relates to a selective distillation apparatus and a distillation method, which provides a distillation apparatus capable of switching between a serial connection mode and a parallel connection mode on the situation, thereby enabling selective operation of high-efficiency operation and high-capacity operation.
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公开(公告)号：US11485692B2
公开(公告)日：2022-11-01
申请号：US16647828
申请日：2019-07-04
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , Sung Kyu Lee , In Seop Kim , Joon Ho Shin , Yeon Uk Choo
摘要： A method for preparing ethylene including: feeding a thermally cracked compressed stream to a first distillation apparatus selectively operating as a first deethanizer or a depropanizer; and feeding an overhead discharge stream of the first distillation apparatus to a second distillation apparatus. When the first distillation apparatus is operated as the first deethanizer, a bottom discharge stream of the second distillation apparatus is fed to a C2 separator. When the first distillation apparatus is operated as the depropanizer, the bottom discharge stream of the second distillation apparatus is passed through a third distillation apparatus and fed to the C2 separator.
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公开(公告)号：US20220314186A1
公开(公告)日：2022-10-06
申请号：US17608082
申请日：2020-09-18
申请人： LG CHEM, LTD.
发明人： Yeon Uk Choo , Sung Kyu Lee , Hyoung Jun , Hyun Kyu Kim , Chan Hyu Jin , Jin Sung Park
摘要： An esterification reaction apparatus and an esterification reaction method, the esterification reaction apparatus comprising a reaction tank having an accommodation part, in which a raw material containing carboxylic acid and alcohol is accommodated, a heating unit configured to individually heat partition regions that are partitioned into N regions in a vertical direction of the accommodation part, and a controller configured to control the heating unit so that only the partition regions in which a liquid is accommodated among the N partition regions are heated, thereby performing an esterification reaction of the raw material.
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4.发明申请公开(公告)号：US20220402853A1
公开(公告)日：2022-12-22
申请号：US17639031
申请日：2021-06-03
申请人： LG CHEM, LTD.
发明人： Yeon Uk Choo , Jae Hun Jeong , Sung Kyu Lee
摘要： The present invention relates to a reaction control method in which a conversion rate of a reaction may be predicted from a flow rate of a feed introduced into a reactor and a flow rate of product water generated in the reactor, and through which the conversion rate of the reactor may be easily controlled.
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公开(公告)号：US11286216B2
公开(公告)日：2022-03-29
申请号：US16648541
申请日：2019-07-15
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , In Seop Kim , Sung Kyu Lee , Joon Ho Shin , Yeon Uk Choo
摘要： A method for preparing ethylene, including: passing a feed stream containing C1 and C2 hydrocarbon compounds through a first heat exchanger and feeding the feed stream passed through the first heat exchanger to a second gas-liquid separator; feeding a part of a bottom discharge stream of the second gas-liquid separator to a demethanizer, passing an overhead discharge stream of the second gas-liquid separator through a second heat exchanger, feeding the overhead discharge stream of the second gas-liquid separator passed through the second heat exchanger to a third gas-liquid separator; feeding a bottom discharge stream of the third gas-liquid separator to the demethanizer; feeding a bottom discharge stream of the demethanizer to a C2 separator; feeding an overhead discharge stream of the C2 separator to a second compressor; passing a part of a compressed discharge stream of the second compressor through the first heat exchanger and feeding the part of the compressed discharge stream of the second compressor passed through the first heat exchanger to the second compressor as a first circulation flow; passing a part of the compressed discharge stream of the second compressor through the second heat exchanger and feeding the part of the compressed discharge stream of the second compressor passed through the second heat exchanger to a first compressor as a second circulation flow; and feeding a compressed discharge stream of the first compressor to the second compressor, and an apparatus for preparing ethylene for implementing the same.
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公开(公告)号：US20210363074A1
公开(公告)日：2021-11-25
申请号：US16648541
申请日：2019-07-15
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , In Seop Kim , Sung Kyu Lee , Joon Ho Shin , Yeon Uk Choo
摘要： A method for preparing ethylene, including: passing a feed stream containing C1 and C2 hydrocarbon compounds through a first heat exchanger and feeding the feed stream passed through the first heat exchanger to a second gas-liquid separator; feeding a part of a bottom discharge stream of the second gas-liquid separator to a demethanizer, passing an overhead discharge stream of the second gas-liquid separator through a second heat exchanger, feeding the overhead discharge stream of the second gas-liquid separator passed through the second heat exchanger to a third gas-liquid separator; feeding a bottom discharge stream of the third gas-liquid separator to the demethanizer; feeding a bottom discharge stream of the demethanizer to a C2 separator; feeding an overhead discharge stream of the C2 separator to a second compressor; passing a part of a compressed discharge stream of the second compressor through the first heat exchanger and feeding the part of the compressed discharge stream of the second compressor passed through the first heat exchanger to the second compressor as a first circulation flow; passing a part of the compressed discharge stream of the second compressor through the second heat exchanger and feeding the part of the compressed discharge stream of the second compressor passed through the second heat exchanger to a first compressor as a second circulation flow; and feeding a compressed discharge stream of the first compressor to the second compressor, and an apparatus for preparing ethylene for implementing the same.
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公开(公告)号：US11103803B2
公开(公告)日：2021-08-31
申请号：US16619391
申请日：2018-06-08
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , Sung Kyu Lee , Joon Ho Shin , Yeon Uk Choo
摘要： A distillation device including: a first distillation column having first top, bottom and upper outlets and first upper and lower inlets; a second distillation column equipped with a top condenser and a bottom reboiler, and having second top, bottom and upper outlets and second upper and lower inlets; a vapor recompressor; a heat exchanger; a first supply line supplying a feedstock to the first lower inlet; a first connection line transferring a first bottom flow to the second lower inlet via the heat exchanger; and a second connection line transferring a second top flow to the top condenser via the heat exchanger after passing through the vapor recompressor. The first bottom flow flowing through the first connection line and the second top flow flowing through the second connection line are heat-exchanged in the heat exchanger. A distillation method of a feedstock using the distillation device.
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公开(公告)号：US20200179820A1
公开(公告)日：2020-06-11
申请号：US16619391
申请日：2018-06-08
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , Sung Kyu Lee , Joon Ho Shin , Yeon Uk Choo
摘要： A distillation device including: a first distillation column having first top, bottom and upper outlets and first upper and lower inlets; a second distillation column equipped with a top condenser and a bottom reboiler, and having second top, bottom and upper outlets and second upper and lower inlets; a vapor recompressor; a heat exchanger; a first supply line supplying a feedstock to the first lower inlet; a first connection line transferring a first bottom flow to the second lower inlet via the heat exchanger; and a second connection line transferring a second top flow to the top condenser via the heat exchanger after passing through the vapor recompressor. The first bottom flow flowing through the first connection line and the second top flow flowing through the second connection line are heat-exchanged in the heat exchanger. A distillation method of a feedstock using the distillation device.
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