公开(公告)号：US11970430B2

公开(公告)日：2024-04-30

申请号：US17627122

申请日：2021-06-25

申请人： Zhejiang Quhua Fluor-Chemistry Co Ltd

发明人： Huimei Yu ,  Jiangyong Hong ,  Bo Yang ,  Yang Zhao ,  Yan Zhang ,  Linhui Li ,  Yawen Ren

IPC分类号： C07C17/20 ,  B01J23/26 ,  C07C17/383

CPC分类号： C07C17/20 ,  B01J23/26 ,  C07C17/383

摘要： The present invention provides a method for the co-production of 1,1-difluoroethane and vinyl chloride, including: (a) vaporizing dichloroethane and hydrogen fluoride, and delivering the vaporized dichloroethane and hydrogen fluoride into a reactor for a catalytic reaction under the action of a catalyst to obtain a reaction product; (b) delivering the reaction product into a first rectifying tower for separation to obtain an overhead product from the first rectifying tower and a bottom product from the first rectifying tower; (c) delivering the overhead product from the first rectifying tower into a second rectifying tower for separation to obtain hydrogen chloride and a bottom product from the second rectifying tower; (d) delivering the bottom product from the second rectifying tower into a purifying tower for purification to obtain an overhead product from the purifying tower; (e) simultaneously delivering the overhead product from the purifying tower and a saturated organic solvent into a third rectifying tower for separation to obtain a 1,1-difluoroethane product and a bottom product from the third rectifying tower; and (f) delivering the bottom product from the third rectifying tower into a fourth rectifying tower for separation to obtain a vinyl chloride product and a bottom stream from the fourth rectifying tower. The present invention has the advantages of simple process, high conversion rate, and good product quality.