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公开(公告)号：US06245923B1
公开(公告)日：2001-06-12
申请号：US09214456
申请日：1999-01-05
IPC分类号： C11B1300
CPC分类号： C07C51/412 , C07C51/42 , Y02C20/30 , C07C53/21
摘要： The process for the recovery of highly fluorinated carboxylic acids from off-gas streams, in which the off-gas is brought into contact with an alkaline washing solution of density >1.15 g/cm3 so that the salt of the highly fluorinated carboxylic acid settles out as a separate phase, proceeds particularly advantageously when the alkaline washing solution is a potassium carbonate solution.
摘要翻译： 从废气流中回收高度氟化的羧酸的方法，其中废气与密度> 1.15g / cm 3的碱性洗涤溶液接触，使得高度氟化的羧酸的盐沉降 作为单独的相，当碱性洗涤溶液是碳酸钾溶液时，特别有利地进行。
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公开(公告)号：US06833403B1
公开(公告)日：2004-12-21
申请号：US09857081
申请日：2001-08-03
IPC分类号： C08F216
CPC分类号： C08J3/03 , C08F6/16 , C08F14/18 , C08J2327/12 , C09D127/12 , C09D127/18 , C08L2666/28
摘要： Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a nonionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.
摘要翻译： 通过向分散体中加入非离子乳化剂，通过与阴离子交换剂接触除去含氟乳化剂并从阴离子交换剂中分离分散体，可以从含氟聚合物分散体中除去含氟乳化剂。 所得分散体可以被浓缩并用于涂布应用。
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公开(公告)号：US06489419B1
公开(公告)日：2002-12-03
申请号：US08771785
申请日：1996-12-20
IPC分类号： C08F11612
CPC分类号： C08J3/12 , B29C43/00 , B29K2027/18 , B29K2105/251 , C08J3/16 , C08J2327/18 , C08L27/18 , Y10T428/2982
摘要： Non-free flowable, non-dusting molding powders with a bulk density of more than 450 g/l are obtained when a suspension polymer of tetrafluoroethylene with a content of 0.01 to 1% by weight of units of at least one perfluoro(alkyl-vinyl) ether is ground to a particle diameter of 10 to 50 &mgr;m and agglomerated in water.
摘要翻译： 当四氟乙烯的悬浮聚合物的含量为0.01至1重量％至少一个全氟（烷基 - 乙烯基）的单体时，可获得堆积密度大于450g / l的非自由流动的非粉尘成型粉末 ）醚研磨至10-50微米的粒径并在水中凝聚。
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公开(公告)号：US07358296B2
公开(公告)日：2008-04-15
申请号：US10970973
申请日：2004-10-21
IPC分类号： C08K3/00
CPC分类号： C08J3/03 , C08F6/16 , C08F14/18 , C08J2327/12 , C09D127/12 , C09D127/18 , C08L2666/28
摘要： Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a non ionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.
摘要翻译： 通过向分散体中加入非离子乳化剂，通过与阴离子交换剂接触除去含氟乳化剂，并从阴离子交换剂中分离分散体，可以从含氟聚合物分散体中除去含氟乳化剂。 所得分散体可以被浓缩并用于涂布应用。
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5.发明授权Process for non-free flowable molding powders of modified polytetrafluoroethylenes 失效改性聚四氟乙烯非自由流动成型粉末的方法
公开(公告)号：US6099774A
公开(公告)日：2000-08-08
申请号：US54086
申请日：1998-04-02
IPC分类号： C08F214/26 , B29C43/00 , C08F2/18 , C08F6/06 , C08F6/18 , C08F16/14 , C08F216/14 , C08J3/12 , C08L27/18 , B29C67/02 , B29C67/04
CPC分类号： C08J3/12 , C08J3/16 , C08L27/18 , B29C43/00 , B29K2027/18 , B29K2105/251 , C08J2327/18 , Y10T428/2982
摘要： Non-free flowable, non-dusting molding powders with a bulk density of more than 450 g/l are obtained when a suspension polymer of tetrafluoroethylene with a content of 0.01 to 1% by weight of units of at least one perfluoro(alkyl-vinyl) ether is ground to a particle diameter of 10 to 50 .mu.m and agglomerated in water.
摘要翻译： 当四氟乙烯的悬浮聚合物的含量为0.01至1重量％至少一个全氟（烷基 - 乙烯基）的单体时，可获得堆积密度大于450g / l的非自由流动的非粉尘成型粉末 ）醚研磨至10〜50μm的粒径，并在水中结块。
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公开(公告)号：US5990330A
公开(公告)日：1999-11-23
申请号：US612388
申请日：1996-03-07
CPC分类号： C07C51/412 , C07C51/42
摘要： Highly fluorinated carboxylic acids can be removed from exhaust gas streams by scrubbing with concentrated alkali solutions if these alkali solutions have a density high enough for the salt of the highly fluorinated carboxylic acid to separate out as an independent phase. An apparatus suitable therefor contains a scrubber and a separation vessel which is advantageously equipped with a conveying element, a collection vessel connected via an overflow and a circulation line for the scrubbing liquor.
摘要翻译： 如果这些碱溶液的密度足够高以使高度氟化的羧酸的盐作为独立相分离出，则可以通过用浓碱溶液洗涤从排气流中除去高度氟化的羧酸。 适合于此的装置包括洗涤器和分离容器，其有利地配备有输送元件，经由溢流器连接的收集容器和用于洗涤液体的循环管线。
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