公开(公告)号：US20050165254A1

公开(公告)日：2005-07-28

申请号：US11088370

申请日：2005-03-24

申请人： Ta-Wei Fu ,  Steven Swearingen ,  Takuya Ichida ,  Shigeyuki Yoshii

发明人： Ta-Wei Fu ,  Steven Swearingen ,  Takuya Ichida ,  Shigeyuki Yoshii

IPC分类号： C07C51/04 ,  C07C51/48 ,  C07C59/135

CPC分类号： C07C51/04 ,  C07C51/48 ,  C07C59/135 ,  C07C53/21

摘要： A fluorocarboxylic acid preparation process which includes hydrolyzing fluorocarboxylic acid fluoride in the presence of an aqueous sulfuric acid solution to form a reaction product containing a fluorocarboxylic acid and hydrogen fluoride (present as hydrofluoric acid); and removing at least some of the hydrogen fluoride from the reaction product by washing the reaction production with aqueous sulfuric acid solution. The hydrolyzing and washing are carried out at a temperature at which the fluorocarboxylic acid is a liquid.

摘要翻译： 一种氟代羧酸制备方法，其包括在硫酸水溶液存在下水解氟代羧酸，形成含有氟代羧酸和氟化氢（以氢氟酸形式存在）的反应产物; 并通过用硫酸水溶液洗涤反应生成，从反应产物中除去至少一些氟化氢。 水解和洗涤在氟代羧酸是液体的温度下进行。

公开(公告)号：US07253315B2

公开(公告)日：2007-08-07

申请号：US11088370

申请日：2005-03-24

申请人： Ta-Wei Fu ,  Steven H. Swearingen ,  Takuya Ichida ,  Shigeyuki Yoshii

发明人： Ta-Wei Fu ,  Steven H. Swearingen ,  Takuya Ichida ,  Shigeyuki Yoshii

IPC分类号： C07C53/15 ,  C07C51/58

CPC分类号： C07C51/04 ,  C07C51/48 ,  C07C59/135 ,  C07C53/21

摘要： A fluorocarboxylic acid preparation process which includes hydrolyzing fluorocarboxylic acid fluoride in the presence of an aqueous sulfuric acid solution to form a reaction product containing a fluorocarboxylic acid and hydrogen fluoride (present as hydrofluoric acid); and removing at least some of the hydrogen fluoride from the reaction product by washing the reaction production with aqueous sulfuric acid solution. The hydrolyzing and washing are carried out at a temperature at which the fluorocarboxylic acid is a liquid.

摘要翻译： 一种氟代羧酸制备方法，其包括在硫酸水溶液存在下水解氟代羧酸，形成含有氟代羧酸和氟化氢（以氢氟酸形式存在）的反应产物; 并通过用硫酸水溶液洗涤反应生成，从反应产物中除去至少一些氟化氢。 水解和洗涤在氟代羧酸是液体的温度下进行。

公开(公告)号：US06849163B2

公开(公告)日：2005-02-01

申请号：US10220316

申请日：2001-02-27

申请人： Shigeyuki Yoshii ,  Yukio Homoto

发明人： Shigeyuki Yoshii ,  Yukio Homoto

IPC分类号： C07C17/269 ,  C07C17/38 ,  C07C17/383 ,  B01D3/14 ,  B01D3/36 ,  C07C21/18

CPC分类号： C07C17/269 ,  C07C17/38 ,  C07C17/383 ,  C07C21/18 ,  C07C21/185

摘要： There is provided a process for recovering tetrafluoroethylene wherein an amount of energy required to obtain TFE is reduced.In the process for producing a TFE mixture as an intended mixture which contains TFE at a higher concentration from a raw material mixture (10) which contains TFE, a component of which boiling point is lower than that of TFE and a component of which boiling point is higher than that of TFE,(1) the raw material is subjected to a preliminary distillation treatment (12) so as to obtain (a) a first fraction (15) which contains at least a portion of the component of which boiling point is higher than that of TFE and (b) a second fraction (14) as the balance which contains TFE and the component of which boiling point is lower than that of TFE, and then(2) the second fraction is subjected to a main distillation treatment (16) so as to obtain (c) a third faction (20) formed by distilling off the component of which boiling point is lower than that of TFE, and (d) a fourth fraction (18) as the intended mixture being the balance which contains TFE.

摘要翻译： 提供了一种回收四氟乙烯的方法，其中获得TFE所需的能量减少。在从含有TFE的原料混合物（10）中制备含有较高浓度的TFE的预期混合物的TFE混合物的方法中， 沸点低于TFE的成分，沸点高于TFE的成分的成分，（1）对原料进行预蒸馏处理（12），得到（a） 含有至少一部分沸点高于TFE的部分的第一馏分（15）和（b）作为余量的第二馏分（14），其含有TFE和沸点较低的成分 （2）第二馏分进行主蒸馏处理（16），得到（c）通过蒸馏除沸点低于沸点的组分形成的第三馏分（20） 的TFE，（d）第四 作为预期混合物的级分（18）是包含TFE的天平。