-
公开(公告)号：US10239984B2
公开(公告)日：2019-03-26
申请号：US15323999
申请日：2015-07-02
IPC分类号： C08G12/00 , C07C209/78 , C08G12/08 , C07C209/54 , B01J29/08 , B01J29/70 , B01J29/18 , B01J29/00
摘要： The invention relates to a production process for polyamines through condensation of aromatic amines with formaldehyde employing at least one solid zeolite catalyst partially or fully ion-exchanged to the protonic form which has been A) alkaline-treated, wherein the alkaline treatment is in case of BEA zeolites carried out in the presence of a pore-directing agent and in case of zeolites other than BEA zeolites in the presence or absence of a pore-directing agent, or B) acid-treated without any alkaline treatment preceding or following said acid treatment, wherein the acid treatment is effected with an organic acid with chelating function.
-
公开(公告)号：US10538480B2
公开(公告)日：2020-01-21
申请号：US15632501
申请日：2017-06-26
IPC分类号： C07C209/78 , C07C211/50 , B01J21/04 , B01J21/08 , C08G12/08 , C08G73/02 , C07C209/54
摘要： The invention relates to a production process for di- and polyamines of the diphenylmethane series by the rearrangement of a condensation product of aniline and a methylene group-supplying agent preferably selected from the group consisting of aqueous formaldehyde solution, gaseous formaldehyde, para-formaldehyde, trioxane and mixtures thereof, wherein said condensation product is reacted in the presence of at least one silica-alumina catalyst, said catalyst having a surface area as determined by the BET method carried out according to ASTM D3663-03 (2015) of from 200 m2/g to 520 m2/g, preferably of from 350 m2/g to 495 m2/g, particularly preferably of from 400 m2/g to 490 m2/g, a molar ratio of silica/alumina on the catalyst surface of A, an overall (bulk) molar ratio of silica/alumina of C, and a quotient B=A/C; said catalyst being characterised in that “low” A values (i.e. equal to or lower than 8.0) are combined with “high” B values (i.e. of from 1.50 to 3.00), and “high” A values (i.e. larger than 8.00, especially equal to or larger than 8.50) are combined with “low” B values (i.e. of from 0.15 to 1.40).
-
公开(公告)号：US20170158798A1
公开(公告)日：2017-06-08
申请号：US15323999
申请日：2015-07-02
IPC分类号： C08G12/08 , B01J29/18 , B01J29/08 , B01J29/70 , C07C209/54 , C07C209/78
CPC分类号： C08G12/08 , B01J29/08 , B01J29/18 , B01J29/70 , B01J29/7007 , C07C209/54 , C07C209/78 , Y02P20/582 , C07C211/50
摘要： The invention relates to a production process for polyamines through condensation of aromatic amines with formaldehyde employing at least one solid zeolite catalyst partially or fully ion-exchanged to the protonic form which has been A) alkaline-treated, wherein the alkaline treatment is in case of BEA zeolites carried out in the presence of a pore-directing agent and in case of zeolites other than BEA zeolites in the presence or absence of a pore-directing agent, or B) acid-treated without any alkaline treatment preceding or following said acid treatment, wherein the acid treatment is effected with an organic acid with chelating function.
-
-
搜索结果
3 条记录 (耗时 0.015 秒)
