申请人:Zhejiang Quzhou Juxin Fluorine Chemical Co., Ltd.
公开号:US20170144950A1
公开(公告)日:2017-05-25
A method for preparing 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene, including: providing a first reactor including a first section, a second section, and a third section, with each section being filled with different catalysts, preheating hexafluoropropylene and hydrogen, and introducing the hexafluoropropylene and the hydrogen to the first reactor to yield a first mixture including: 1,1,1,2,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane, and hydrogen fluoride; introducing the first mixture to a first distillation column to yield 1,1,1,2,3,3-hexafluoropropane at a top of the first distillation column and 1,1,1,2,3-pentafluoropropane and hydrogen fluoride at a bottom of the first distillation column, recycling the 1,1,1,2,3,3-hexafluoropropane to a lower part of the first section of the first reactor, and introducing the 1,1,1,2,3-pentafluoropropane and the hydrogen fluoride to a second reactor to yield a second mixture including: 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, hydrogen fluoride, and 1,1,1,2,3-pentafluoropropane; and performing water washing, alkaline washing, drying, and distillation on the second mixture to yield 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene.
制备2,3,3,3-四氟丙烯和1,3,3,3-四氟丙烯的方法,包括:提供一个包括第一部分、第二部分和第三部分的第一反应器,每个部分填充有不同的催化剂,预热六氟丙烯和氢气,并将六氟丙烯和氢气引入第一反应器,产生包括:1,1,1,2,3-五氟丙烷、1,1,1,2,3,3-六氟丙烷和氟化氢的第一混合物;将第一混合物引入第一蒸馏塔,产生1,1,1,2,3,3-六氟丙烷在第一蒸馏塔顶部,1,1,1,2,3-五氟丙烷和氟化氢在第一蒸馏塔底部,将1,1,1,2,3,3-六氟丙烷循环至第一反应器的第一部分的下部,并将1,1,1,2,3-五氟丙烷和氟化氢引入第二反应器,产生包括:2,3,3,3-四氟丙烯、1,3,3,3-四氟丙烯、氟化氢和1,1,1,2,3-五氟丙烷的第二混合物;对第二混合物进行水洗、碱洗、干燥和蒸馏,产生2,3,3,3-四氟丙烯和1,3,3,3-四氟丙烯。