TH12552B - Process for production 1,1,1,2-tetrafluoroethane - Google Patents

Abstract

Process for production 1,1,1,2-tetrafluoroethylene from trichlorethylene and HF, which consists of the transmission of the products of the reaction of trichloro-ethylene with HF and the products of Reaction of 1,1,1-Trifluoro-2-Chloroethane with HF enters the first distillation tower, either separately or together as a mixture of it, stores HCL as distilled. Leave the top of the first distillery and send the rest. Into the second distillery

Claims (4)

1. Process for production 1,1,1,2-tetrafluoroethane from The reaction of trichlorethylene with HF includes: Trichlorethylene reacts with HF in the reaction section. The first to get 1,1,1-Trifluoro-2-Chloroethane, 1,1,1-trifluoro-2-Chloroethane reacts with HF in the second reaction part. To get 1,1,1,2-tetrafluoroethane Send the products of the first and second reaction sections into the tower. Distillation at One, either separately or as a combination of its mixtures, collects the HCL into the distillate from the top of the first distillation tower and sends the remainder into the second distillate to obtain 1,1, 1,2-tetrafluoroethane 2. The process referred to in claim 1, which includes: delivery of produce from the first and second reactive parts. Either separately or As a mixture of them into the first distillation chamber to separate the produce into distillate parts from Top of the first distillation tower containing HCL and liquid from the bottom of the first distillation containing 1,1, 1,2-tetrafluoroethane, 1,1,1-trifluoro-2. - Chloroethane and HF are the main components. The liquid is delivered from the bottom of the first distillation tower into the second distillation tower. To separate the liquid from the bottom of the first distillation tower into (i) the distillate from the top of the tower. The second that contains 1,1,1,2-tetrafluoroethane And a small amount of 1,1,1-trifluoro-2-chloroethane and HF (ii) separated on the side of Second distillation tower available 1,1,1-trifluoro-2-chloroethane and HF are the main components, and (iii) the second distillate with HF as the main component. Send the distillation from the top of the second distillate into the process. Purification provided separately for storage 1,1,1,2-tetrafluoroethane Feed the separate side of the second distillation tower into the The second reactor reacts, and the liquid is fed from the bottom of the second distillation tower into the reaction section. The first to react 3. The process as claimed in claim 1, which includes: delivering products from the first and second reactive parts either by Separated or combined as their mixtures into one distillation chamber to separate the produce into The distillation at the top of the first distillation tower contains HCL and bottom liquid. One distillation tower with 1,1,1,2-tetrafluoroethane, 1,1,1-trifluoro-2-chloroethane and HF are the main components. The liquid is delivered from the bottom of the first distillation tower into the second distillation tower. To separate the liquid from the bottom of the first distillation tower into (i) the distillation part through the top of the tower. Second distillation that contains 1,1,1,2-tetrafluoroethane And a small amount of 1,1,1-trifluoro-2-chloroethane and HF, and (ii) fluid from the bottom of the tower. Second distillation available 1,1,1-trifluoro-2-chloroethane and HF are the main components. Send the distillation at the top of the second distillation tower into the process. Purification provided separately for storage 1,1,1,2-tetrafluoroethane The liquid is delivered from the bottom of the second distillate into the third distillation, feeds the distillation at the top of the third distillation into the chamber. The second reaction, and the liquid is fed from the bottom of the third distillation tower into the first reaction section. 4. The process referred to in claim 1, which includes: delivery of products from the first and second reactive parts, whether separately, together as their mixtures. Go into the first distillation tower to separate the produce. Into the distillation from the top of the first distillation tower containing HCL and liquid from The bottom of the distillation tower which one has 1,1,1,2-tetrafluoroethane, 1,1,1-trifluoro 2-chloroethane and HF are the main components. The liquid from the bottom of the first distillation tower into the second Separate the liquid from the bottom of the first distillation tower into (i) the distillate from the top of the second distillation with 1,1,1,2-tetrafluoroethane. 1,1,1-trifluoro-2-chloroethane, and HF are the main components and (ii) the second distillate bottom liquid with HF as the main component. Send the distillate from the top of the second distillation tower into the Third, to separate the distillate from the top of the second distillate into (i) the distillate. From the top of the third distillation tower and (ii) the liquid from the bottom of the third distillation tower contains 1,1,1-tri-fluoro-2-chloroethane. As the main ingredient Send the distillation at the top of the third distillation tower into the process of Purification provided separately for storage 1,1,1,2-tetrafluoroethane The liquid from the bottom of the third distillation chamber is fed into the second reactor, and the liquid from the bottom of the second distillation is fed into the first reaction.