公开(公告)号：US11560346B2

公开(公告)日：2023-01-24

申请号：US17281823

申请日：2019-10-03

申请人： TOKUYAMA CORPORATION

发明人： Akira Sera ,  Masashi Shinagawa ,  Masanari Ishizuki

IPC分类号： C07C29/04 ,  C07C29/76 ,  C07C29/80

摘要： A method for producing isopropyl alcohol is provided in which propylene is hydrated directly with water to produce isopropyl alcohol, the method including: a distillation step in which crude isopropyl alcohol is distilled; and a filtration step in which the isopropyl alcohol obtained in the distillation step is filtered through a filter having an ion-exchange group.

公开(公告)号：US11905499B2

公开(公告)日：2024-02-20

申请号：US17281712

申请日：2019-09-30

申请人： TOKUYAMA CORPORATION

发明人： Shunsuke Hosaka ,  Masanari Ishizuki

IPC分类号： C11D7/50 ,  C11D7/26 ,  C07C29/80 ,  C11D11/00

CPC分类号： C11D7/261 ,  C07C29/80 ,  C11D7/5022 ,  C11D11/0047

摘要： Provided is a high-purity isopropyl alcohol in which the concentration of a C7-12 acetal compound is 100 ppb or less on a mass basis, the concentration of the acetal compound in an accelerated test involving heating for 4 hours at 80° C. in a nitrogen atmosphere is increased by a factor of 30 or less with respect to the value thereof prior to heating, and the concentration of the acetal compound is maintained at a value of 100 ppb or less on a mass basis. Also provided is a method for manufacturing said high-purity isopropyl alcohol.

公开(公告)号：US20220002641A1

公开(公告)日：2022-01-06

申请号：US17281712

申请日：2019-09-30

申请人： TOKUYAMA CORPORATION

发明人： Shunsuke Hosaka ,  Masanari Ishizuki

IPC分类号： C11D7/26 ,  C07C29/80 ,  C11D7/50 ,  C11D11/00

摘要： Provided is a high-purity isopropyl alcohol in which the concentration of a C7-12 acetal compound is 100 ppb or less on a mass basis, the concentration of the acetal compound in an accelerated test involving heating for 4 hours at 80° C. in a nitrogen atmosphere is increased by a factor of 30 or less with respect to the value thereof prior to heating, and the concentration of the acetal compound is maintained at a value of 100 ppb or less on a mass basis. Also provided is a method for manufacturing said high-purity isopropyl alcohol.

公开(公告)号：US11807836B2

公开(公告)日：2023-11-07

申请号：US17281712

申请日：2019-09-30

申请人： TOKUYAMA CORPORATION

发明人： Shunsuke Hosaka ,  Masanari Ishizuki

IPC分类号： C11D7/50 ,  C11D7/26 ,  C07C29/80 ,  C11D11/00

CPC分类号： C11D7/261 ,  C07C29/80 ,  C11D7/5022 ,  C11D11/0047

摘要： Provided is a high-purity isopropyl alcohol in which the concentration of a C7-12 acetal compound is 100 ppb or less on a mass basis, the concentration of the acetal compound in an accelerated test involving heating for 4 hours at 80° C. in a nitrogen atmosphere is increased by a factor of 30 or less with respect to the value thereof prior to heating, and the concentration of the acetal compound is maintained at a value of 100 ppb or less on a mass basis. Also provided is a method for manufacturing said high-purity isopropyl alcohol.

公开(公告)号：US20220017440A1

公开(公告)日：2022-01-20

申请号：US17281823

申请日：2019-10-03

申请人： TOKUYAMA CORPORATION

发明人： Akira Sera ,  Masashi Shinagawa ,  Masanari Ishizuki

IPC分类号： C07C29/04 ,  C07C29/80 ,  C07C29/76

摘要： A method for producing isopropyl alcohol is provided in which propylene is hydrated directly with water to produce isopropyl alcohol, the method including: a distillation step in which crude isopropyl alcohol is distilled; and a filtration step in which the isopropyl alcohol obtained in the distillation step is filtered through a filter having an ion-exchange group.