US 12,404,366 B2
System and method for preparing polyether amine by catalytic amination of polyether diol
Yifan Xu, Shaoxing (CN); Majishi Wang, Shaoxing (CN); Jiang Yu, Shaoxing (CN); Minggui Song, Shaoxing (CN); and Jun Wang, Shaoxing (CN)
Assigned to Zhejiang Huangma Technology Co., Ltd., Shaoxing (CN); Zhejiang Lukean Chemical Co., Ltd., Shaoxing (CN); Shangyu Huangma Surface Activated Reagent Research Institute Co., Ltd., Shaoxing (CN); and Zhejiang Huangma Shangyi New Material Co., Ltd., Shaoxing (CN)
Filed by Zhejiang Huangma Technology Co., Ltd., Zhejiang (CN); Zhejiang Lukean Chemical Co., Ltd., Zhejiang (CN); Shangyu Huangma Surface Activated Reagent Research Institute Co., Ltd., Zhejiang (CN); and Zhejiang Huangma Shangyi New Material Co., Ltd., Zhejiang (CN)
Filed on Nov. 29, 2022, as Appl. No. 18/071,608.
Claims priority of application No. 202111459532.8 (CN), filed on Dec. 1, 2021.
Prior Publication US 2023/0167239 A1, Jun. 1, 2023
Int. Cl. C08G 65/00 (2006.01)
CPC C08G 65/00 (2013.01) 10 Claims
 
1. A method for preparing a polyether amine by catalytic amination of a polyether diol, wherein a system for preparing the polyether amine by the catalytic amination of the polyether diol is used, and the system comprises a fixed bed reactor, an air inlet of the fixed bed reactor is communicated with a hydrogen tank; the fixed bed reactor is provided with a heating furnace; a top portion of the fixed bed reactor is provided with a feed inlet, a bottom portion is provided with a discharge outlet, the feed inlet is communicated with a multi-stage preheater, and the multi-stage preheater is connected with a raw material tank; and
the method comprises: filling a catalyst into the fixed bed reactor; pressurizing the internal pressure of the fixed bed reactor to 10˜13 MPa by a hydrogen gas, and raising the temperature of the fixed bed reactor to 150˜185° C.; adjusting the temperature of the multi-stage preheater so that the feeding temperature of a raw material reaches 125˜135° C.; and simultaneously feeding a polyether diol, liquid ammonia and the hydrogen gas into the multi-stage preheater, and after mixing and preheating, introducing into the fixed bed reactor from the feed inlet of the fixed bed reactor for a continuous catalytic amination reaction, wherein a finished product after the reaction is discharged and received from the discharge outlet of the fixed bed reactor.