Process for separating hydrogen fluoride from organic feedstocks
    2.
    发明授权
    Process for separating hydrogen fluoride from organic feedstocks 有权
    从有机原料中分离氟化氢的方法

    公开(公告)号:US08519201B2

    公开(公告)日:2013-08-27

    申请号:US13423726

    申请日:2012-03-19

    IPC分类号: C07C17/38 C07C17/00

    摘要: Provided is a process for purifying an organic feedstock comprising (a) distilling a raw organic feedstock comprising hydrogen fluoride, 2-chloro-1,1,1,2-tetrafluoropropane, and 2-chloro-3,3,3-trifluoropropene to produce a first distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a first bottoms stream rich in hydrogen fluoride; (b) cooling said first distillate stream to produce an intermediate composition comprising an organic layer rich in 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, and an acid layer rich in hydrogen fluoride; and, optionally but preferably, (c) distilling said organic layer to produce a second distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a second bottoms stream comprising a purified organic feedstock substantially free of hydrogen fluoride.

    摘要翻译: 提供了一种纯化有机原料的方法,其包括(a)蒸馏包含氟化氢,2-氯-1,1,1,2-四氟丙烷和2-氯-3,3,3-三氟丙烯的原始有机原料以产生 包含2-氯-1,1,1,2-四氟丙烷,2-氯-3,3,3-三氟丙烯和氟化氢的类共沸组合物的第一蒸馏物流和富含氟化氢的第一塔底物流 ; (b)冷却所述第一馏出物流以产生包含富含2-氯-1,1,1,2-四氟丙烷和2-氯-3,3,3-三氟丙烯的有机层和富含酸层的中间组合物 在氟化氢中; 和(c)蒸馏所述有机层以产生包含2-氯-1,1,1,2-四氟丙烷的共沸混合物组合物,2-氯-3,3,3-四氯丙烷的第二馏出物流, 三氟丙烯和氟化氢,以及包含基本上不含氟化氢的纯化有机原料的第二塔底物流。

    Method for separating halocarbons
    8.
    发明授权
    Method for separating halocarbons 有权
    卤代烃分离方法

    公开(公告)号:US08481793B2

    公开(公告)日:2013-07-09

    申请号:US13558476

    申请日:2012-07-26

    IPC分类号: C07C21/00

    摘要: The invention provides a method for separating halocarbons. In particular, a method for separating 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) from 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) based on differences in melting points of these compounds. More particularly the invention pertains to a method for separating HCFC-244bb from HCFO-1233xf which are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).

    摘要翻译: 本发明提供一种分离卤代烃的方法。 特别地,基于这些的熔点的差异,从2-氯-3,3,3-三氟丙烯(HCFO-1233xf)中分离出2-氯-1,1,1,2-四氟丙烷(HCFC-244bb)的方法 化合物。 更具体地说,本发明涉及从HCFO-1233xf中分离HCFC-244bb的方法,其可用作生产2,3,3,3-四氟丙烯(HFO-1234yf)中的中间体。