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公开(公告)号:US20210146336A1
公开(公告)日:2021-05-20
申请号:US17045025
申请日:2019-11-08
申请人: LG Chem, Ltd.
发明人: Jaeyul Kim , Jong Hun Song , Gicheul Kim , Yoon Jae Min , Ki Hyun Kim , Seul Ah Lee , In Yong Jeong , Heechang Woo
IPC分类号: B01J20/26 , C08F120/06 , C08F222/10 , C08F2/48 , C08J9/14 , C08J9/16 , C08K9/10
摘要: The method for preparing a super absorbent polymer according to the present disclosure has a feature that it is possible to reduce the generation of a fine powder during production of the super absorbent polymer while maintaining excellent physical properties of the super absorbent polymer, including centrifuge retention capacity (CRC) and vortex removal time.
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2.
公开(公告)号:US10457620B2
公开(公告)日:2019-10-29
申请号:US16329087
申请日:2017-11-28
申请人: LG CHEM, LTD.
发明人: Sang Beom Lee , Sung Kyu Lee , Joon Ho Shin , Sung Ho Lee , Sa Eun Park , In Yong Jeong
IPC分类号: C07C37/20 , C07C37/74 , C07C37/88 , C07C39/04 , C07C39/16 , B01D3/32 , C07C37/08 , C07C37/68 , C07C37/70 , C07C37/86
摘要: A system for producing phenol and bisphenol A comprising: a first production unit for producing phenol comprising a decomposition reaction unit and a purification unit; a second production unit for producing bisphenol A comprising a reaction unit and a concentration unit; and a removal unit for removing methanol and acetone during the production of phenol and bisphenol A. The removal unit includes a removal column comprising an overhead purge part, a bottom recirculation part and a supply part. The supply part comprises a purification unit discharge part to supply methanol, acetone, and water discharged from the purification unit to the removal column and a concentration unit discharge part to supply phenol, acetone, and water discharged from the concentration unit to the removal column, and is provided to the midsection of the removal column.
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