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公开(公告)号：US11434319B2
公开(公告)日：2022-09-06
申请号：US16291618
申请日：2019-03-04
发明人： Gi Jung Kim , Seul Gi Kim , Seung Moo Huh , Jin Woo Park
IPC分类号： C08G18/08 , C08F212/10 , C08G18/48 , C08G18/63 , C08L25/12 , C08L71/00 , C08F283/06
摘要： Provided is a method of preparing a polymer polyol, including steps of: (a) polymerizing a polyol and a monomer in presence of a diluent to prepare a primary particle dispersed liquid; and (b) feeding an additional polyol and monomer into the primary particle dispersed liquid and polymerizing to prepare a secondary particle dispersed liquid.
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2.发明授权公开(公告)号：US11078135B2
公开(公告)日：2021-08-03
申请号：US16707384
申请日：2019-12-09
发明人： Kyoung Ho Row , Yong Hee Yun , Jin Woo Park , Jae Woo Kim
IPC分类号： B01J8/02 , C07C5/48 , C07C5/32 , C07C11/167
摘要： One aspect of the present disclosure provides a system for producing 1,3-butadiene, which includes: a first supply unit, by which a first feed including a butene raw material, oxygen and steam is supplied; a second supply unit, by which a second feed including a butene raw material and oxygen is supplied; and a reaction unit, which includes a catalyst fixed bed and in which an oxidative dehydrogenation reaction takes place, wherein the first supply unit is connected to a front end of the reaction unit, and the second supply unit is connected to an intermediate end of the reaction unit.
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