Patent ID: 11970430
Assignee: ZHEJIANG QUHUA FLUOR-CHEMISTRY CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
1. A method for the co-production of 1,1-difluoroethane and vinyl chloride, comprising the following steps:
(a) vaporizing dichloroethane and hydrogen fluoride by a vaporizer, 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 from the top of the second rectifying tower and a bottom product from the bottom of 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 from the top of the third rectifying tower and a bottom product from the bottom of 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.