公开(公告)号：US20230098112A1

公开(公告)日：2023-03-30

申请号：US17789067

申请日：2020-12-23

申请人： DAICEL CORPORATION

发明人： Masahiko SHIMIZU ,  Yasuteru KAJIKAWA ,  Yuuichirou HIRAI ,  Keisuke ONO ,  Midori UMEHARA ,  Yuki TESHIMA ,  Tetsuro NAKANISHI

IPC分类号： C07C31/20 ,  A61Q19/00 ,  C07C29/80 ,  A61K8/34

摘要： A high-purity 1,3-butylene glycol product is provided, which is colorless and odorless (or almost colorless and odorless), unlikely to cause coloration and odor over time, and, besides, unlikely to cause an acid concentration increase over time also in a state containing water. A 1,3-butylene glycol product in which at least one of a content of methyl vinyl ketone, a content of acetone, a content of butylaldehyde, a content of acetaldol, a content of a compound represented by Formula (1) below, a content of a compound represented by Formula (2) below, a content of a compound represented by Formula (3) below, and a total content of a compound represented by Formula (4) below and a compound represented by Formula (5) below, is less than 8 ppm.

公开(公告)号：US20220362118A1

公开(公告)日：2022-11-17

申请号：US17640514

申请日：2020-09-03

申请人： DAICEL CORPORATION

发明人： Yasuteru KAJIKAWA ,  Yuki TESHIMA ,  Yuuichirou HIRAI ,  Keisuke ONO ,  Midori UMEHARA ,  Tetsuro NAKANISHI

IPC分类号： A61K8/34 ,  C07C31/20 ,  A61Q19/00

摘要： Provided is a high-purity 1,3-butylene glycol product that is odorless and is unlikely to cause acid concentration increase over time in a state containing water. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak area ratio of 100 ppm or lower appearing in a relative retention time ranging from 1.35 to 1.45, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.

公开(公告)号：US20220323322A1

公开(公告)日：2022-10-13

申请号：US17640701

申请日：2020-09-03

申请人： DAICEL CORPORATION

发明人： Yasuteru KAJIKAWA ,  Tetsuro NAKANISHI ,  Yuuichirou HIRAI ,  Keisuke ONO ,  Midori UMEHARA ,  Yuki TESHIMA

IPC分类号： A61K8/34 ,  C07C31/20 ,  A61Q19/00

摘要： Provided is a high-purity 1,3-butylene glycol product that is colorless and odorless, and furthermore, unlikely to be colored over time. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak area ratio of 1000 ppm or lower appearing in a relative retention time ranging from 2.3 to 2.4, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.

公开(公告)号：US20220296481A1

公开(公告)日：2022-09-22

申请号：US17640387

申请日：2020-09-03

申请人： DAICEL CORPORATION

发明人： Yasuteru KAJIKAWA ,  Tetsuro NAKANISHI ,  Yuki TESHIMA ,  Yuuichirou HIRAI ,  Keisuke ONO ,  Midori UMEHARA

IPC分类号： A61K8/34 ,  A61Q19/00

摘要： Provided is a high-purity 1,3-butylene glycol product that is colorless and odorless, unlikely to be colored over time, and furthermore, unlikely to cause acid concentration increase over time in a state containing water. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak ratio of 2000 ppm or lower appearing in a relative retention time ranging from 1.6 to 1.8, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.