JP2004244401A - Method for producing fluorine-containing fluorosulfonylalykyl vinyl ether - Google Patents

Method for producing fluorine-containing fluorosulfonylalykyl vinyl ether Download PDF

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JP2004244401A
JP2004244401A JP2003063065A JP2003063065A JP2004244401A JP 2004244401 A JP2004244401 A JP 2004244401A JP 2003063065 A JP2003063065 A JP 2003063065A JP 2003063065 A JP2003063065 A JP 2003063065A JP 2004244401 A JP2004244401 A JP 2004244401A
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vinyl ether
fluorine
represented
cfcfo
formula
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JP4257498B2 (en
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Kazuyoshi Ichihara
一義 市原
Tatsuya Otsuka
達也 大塚
Akihira Sugiyama
明平 杉山
Akiya Mantani
聡哉 萬谷
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Daikin Industries Ltd
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Daikin Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a fluorine-containing fluorosulfonylalkyl vinyl ether in an industrially advantageous way at a low cost, simply and in a good yield. <P>SOLUTION: This method for producing the fluorine-containing fluorosulfonylalkyl vinyl ether expressed by the formula: CF<SB>2</SB>=CFO(CF<SB>2</SB>CF(CF<SB>3</SB>)O)<SB>n</SB>CF<SB>2</SB>CF<SB>2</SB>SO<SB>2</SB>F [wherein, (n) is 0 or 1] is characterized by using water as a solvent, performing the reaction of a fluorine-containing chlorosulfonylalkyl vinyl ether expressed by the formula: CF<SB>2</SB>=CFO(CF<SB>2</SB>CF(CF<SB>3</SB>)O)<SB>n</SB>CF<SB>2</SB>CF<SB>2</SB>SO<SB>2</SB>Cl [wherein, (n) is the same as above] with a fluorinating agent expressed by the formula: MF(HF)<SB>m</SB>[wherein, M is an alkali metal: and (m) is 0-5]. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、含フッ素フルオロスルホニルアルキルビニルエーテルの製造方法に関する。
【0002】
【従来の技術】
化学式:CF=CFO(CFCF(CF)O)CFCFSOF(式中、nは0又は1である)で表される含フッ素フルオロスルホニルアルキルビニルエーテルは、イオン交換膜材料などの工業原料として有用な化合物である。
【0003】
該含フッ素フルオロスルホニルアルキルビニルエーテル等のスルホニルビニルエーテルの製造方法としては、例えば、ヘキサフルオロプロピレンオキシドをFCOCFSOFに付加させた後、得られた酸フロリド誘導体を熱分解する方法が知られている(下記特許文献1参照)。しかしながら、この方法では、ヘキサフルオロプロピレンオキシドを2分子以上付加したものからは、CF=CFO(CFCF(CF)O)CFCFSOFで表されるスルホビニルエーテルを得ることは可能であるが、ヘキサフルオロプロピレンオキシドを1分子付加したものからは、下記式
【0004】
【化1】

Figure 2004244401
【0005】
で表される環化体が主生成物として生じ、化学式CF=CFOCFCFSOFで表される含フッ素フルオロスルホニルアルキルビニルエーテルをほとんど得ることができない。
【0006】
また、FCOCF(CF)OCFCFSOFを原料として用い、その環化体
【0007】
【化2】
Figure 2004244401
【0008】
を形成した後、CHONaを用いて開環させてCF=CFOCFCFSONaとし、その後、末端のSONa基を塩素化してCF=CFOCFCFSOClとし、更に、フッ素化してSOF基に変換する方法も知られている(下記特許文献2参照)。ここに記載されているフッ素化工程は、溶媒としてスルホランを用い、フッ素化剤としてNaFを用いる方法であるが、溶媒として高融点、高沸点を有するスルホランを用いるため、反応中に分解して生じたCF=CFOCFCFSONaなどの有効成分や、未反応原料のNaF、副生成物であるNaClとの分離が困難であり、スルホランと固体の有効成分を回収する工程が非常に複雑となる。このため、この方法は、工業的実施は困難であり、産業廃棄物が多量に生じるという問題もある。
【0009】
その他に、含フッ素スルホン酸クロリドのフッ素化方法としては、パーフルオロアルキル基を有する化合物であるC17SOClを原料とする場合には、KFを用いてフッ素化することによりC17SOFが得られることが報告されている(下記非特許文献1参照)。この方法では、高収率でフッ素化物を得るためには、スルホラン、ホルムアミドなどを溶媒として用いることが必要であり、単純な反応系が期待できる水を溶媒とした場合には、100℃でフッ素化しても、C17SOFの収率は25%程度に過ぎず、工業的実施化には不適切である。
【0010】
【特許文献1】
英国特許1,034,197号
【0011】
【特許文献2】
米国特許第3,560,568号
【0012】
【非特許文献1】
S.Benefice−Malouet, H. Blancou, R. Teissedre and A. Commeyras, J. Fluorine Chem. 31 (1986) 319−332
【0013】
【発明が解決しようとする課題】
本発明は、上記した現状に鑑みてなされたものであり、その主な目的は、含フッ素フルオロスルホニルアルキルビニルエーテルを、工業的に有利な方法で安価に、しかも簡便に収率良く製造できる方法を提供することである。
【0014】
【課題を解決するための手段】
本発明者は、上記した問題点に鑑みて鋭意研究を重ねてきた。その結果、興味深いことに、CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは0又は1である)で表される含フッ素クロロスルホニルアルキルビニルエーテルを出発原料とする場合には、水を溶媒としてフッ素化剤と反応させることにより、含フッ素フルオロスルホニルアルキルビニルエーテルを高収率で得ることができ、簡便な製造方法によって、低コストでしかも収率良く含フッ素フルオロスルホニルアルキルビニルエーテルを製造することが可能となることを見出し、ここに本発明を完成するに至った。
【0015】
即ち、本発明は、下記の含フッ素フルオロスルホニルアルキルビニルエーテルの製造方法を提供するものである。
1. 水を溶媒として用い、化学式:CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは0又は1である)で表される含フッ素クロロスルホニルアルキルビニルエーテルを、化学式:MF・(HF)(式中、Mは、アルカリ金属であり、mは0〜5である。)で表されるフッ素化剤と反応させることを特徴とする、化学式:CF=CFO(CFCF(CF)O)CFCFSOF(式中、nは上記に同じ)で表される含フッ素フルオロスルホニルアルキルビニルエーテルの製造方法。
2. フッ素化剤が、上記化学式:MF・(HF)において、MがKの化合物及びMがNaの化合物からなる群から選ばれた少なくとも一種である上記項1に記載の製造方法。
3. 上記項1又は2の方法によって含フッ素フルオロスルホニルアルキルビニルエーテルを製造した後、得られた水溶液層から化学式:CF=CFO(CFCF(CF)O)CFCFSOM(式中、nは0又は1であり、Mはアルカリ金属である)で表されるスルホン酸塩を回収し、これを塩素化して化学式:CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは上記に同じ)で表される含フッ素クロロスルホニルアルキルビニルエーテルに変換し、原料として再利用する工程を含む、上記項1又は2に記載の製造方法。
【0016】
【発明の実施の形態】
本発明の含フッ素フルオロスルホニルアルキルビニルエーテルの製造方法は、公知物質であるCF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは0又は1である)で表される含フッ素クロロスルホニルアルキルビニルエーテルを原料として用い、これを水溶媒中でフッ素化剤と反応させて、CF=CFO(CFCF(CF)O)CFCFSOF(式中、nは上記に同じ)で表される含フッ素フルオロスルホニルアルキルビニルエーテルとする方法である。
【0017】
原料として用いる化学式:CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは上記に同じ)で表される含フッ素クロロスルホニルアルキルビニルエーテルの内でn=0の化合物は、例えば米国特許第3,560,568号公報に記載の方法により、公知物質のFCOCF(CF)OCFCFSOFを原料として用い、その環化体を形成した後、CHONaを用いて開環させてCF=CFOCFCFSONaとし、その後、末端のSONa基を塩素化することによって得ることができる。この方法で得られる含フッ素クロロスルホニルアルキルビニルエーテルは、単離、精製したものを使用してもよく、或いは、上記反応で発生させた粗反応混合物をそのまま使用してもよい。
【0018】
本発明方法では、溶媒として水を用いることが必要である。水を溶媒として用いて、上記した含フッ素クロロスルホニルアルキルビニルエーテルをフッ素化剤と反応させることによって、高い転化率で、選択性良く目的とする含フッ素フルオロスルホニルアルキルビニルエーテルを得ることができる。
【0019】
水の使用量については、特に限定的ではなく、フッ素化剤を均一に溶解乃至分散できる量であればよい。通常、含フッ素クロロスルホニルアルキルビニルエーテル100重量部に対して、10〜500重量部程度とすればよい。
【0020】
フッ素化剤としては、化学式:MF・(HF)(式中、Mは、アルカリ金属であり、mは0〜5である。)で表される化合物を用いることができる。フッ素化剤としては、上記化学式において、MがKの化合物又はMがNaの化合物であるアルカリ金属フッ化物、酸性フッ化アルカリ金属等が好ましい。フッ素化剤は一種単独又は二種以上混合して用いることができる。
【0021】
フッ素化剤の使用量は、通常、含フッ素クロロスルホニルアルキルビニルエーテル1モルに対して0.5〜10モル程度とすれば良く、1〜5モル程度とすることが好ましい。
【0022】
本発明の製造方法では、更に、必要に応じて、その他の添加剤を加えることができる。この様な添加剤としては、反応に関与しない水溶性の有機溶媒、例えば、スルホラン、ジメチルスルホキシド、ジメチルホルムアミド等や相関移動触媒、例えば、CCHN(CH・Clのような四級アンモニウム塩、四級ホスホニウム塩等、包接分子、例えば、18−クラウン−6のような環状エーテル等、を用いることができる。これらの添加剤を加えることによって、反応速度を向上させることが可能である。
【0023】
添加剤の使用量は、水性有機溶媒については、原料とする含フッ素クロロスルホニルアルキルビニルエーテル100重量部に対して、1〜50重量部程度とすることが好ましい。
【0024】
また、相間移動触媒については、原料とする含フッ素クロロスルホニルアルキルビニルエーテル100重量部に対して、0.1〜10重量部程度とすることが好ましい。
【0025】
本発明の製造方法では、水溶媒中で上記した原料とフッ素化剤を反応させれば良い。反応条件の一例としては、反応温度10〜200℃程度、好ましくは15〜100℃程度とすればよい。反応圧力については、減圧、大気圧、加圧のいずれでもよいが、大気圧とすることが好ましい。反応時間は、通常、0.5〜24時間程度である。
【0026】
以上の方法によって、化学式:CF=CFO(CFCF(CF)O)CFCFSOF(式中、nは上記に同じ)で表される含フッ素フルオロスルホニルアルキルビニルエーテルを得ることができる。
【0027】
得られた粗化合物は、二層に分液する。下層は、上記化学式で表される含フッ素フルオロスルホニルアルキルビニルエーテルとなり、蒸留、カラムクロマトグラフィーなどの公知の方法で精製できる。
【0028】
この様にして得られる含フッ素フルオロスルホニルアルキルビニルエーテルは、燃料電池電解質ポリマー用のモノマー成分等として有用な物質である。
【0029】
また、本発明方法によって得られる二層に分液した溶液の内で、上層は、上記化学式で表される含フッ素フルオロスルホニルアルキルビニルエーテルが加水分解されて得られるスルホン酸塩(CF=CFO(CFCF(CF)O)CFCFSOM(式中、nは0又は1であり、Mはアルカリ金属である))やMF、MClなどを含む水溶液となる。この様な上層溶液から該スルホン酸塩と、HO、MF及びMClとを分離し、得られたスルホン酸塩を公知の方法で塩素化することによって、本発明方法の原料である化学式:CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは上記に同じ)で表される含フッ素クロロスルホニルアルキルビニルエーテルとして再利用することができる。
【0030】
上層からスルホン酸塩(CF=CFO(CFCF(CF)O)CFCFSOM)を分離する方法としては、公知の方法を適宜適用すれば良く、例えば、上層溶液中に存在する固体をろ過する方法、上層溶液を限外ろ過する方法や、上層溶液を乾固後、有機溶媒に溶解させ該スルホン酸塩を抽出する方法などを採用できる。
【0031】
該スルホン酸塩(CF=CFO(CFCF(CF)O)CFCFSOM)を塩素化する方法としては、例えば、塩素化剤としてPClを用いる方法などを挙げることができる。
【0032】
この方法の一例を記載すると、塩素化剤であるPClの仕込量は、原料であるスルホン酸塩(CF=CFO(CFCF(CF)O)CFCFSOM)に対して、1〜10倍モル程度とすることができる。反応圧力は大気圧、減圧、加圧のいずれでもよい。反応温度は0〜200℃程度が好ましく、反応を加速させるために、反応の進行とともに徐々に加熱していってもよい。生成したCF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは上記に同じ)で表される含フッ素クロロスルホニルアルキルビニルエーテルの分離方法は、反応をさせながら該含フッ素クロロスルホニルアルキルビニルエーテルを含む溜出物を蒸留しながら抜出す方法が好ましいが、反応終了後に生成した含フッ素クロロスルホニルアルキルビニルエーテルを公知の方法、例えば蒸留、抽出、ろ過などで分離する方法でもよい。
【0033】
また、前述した米国特許第3,560,568号公報に記載の方法によって得られる含フッ素クロロスルホニルアルキルビニルエーテル(CF=CFOCFCFSOCl)を本発明方法の原料とする場合には、該米国特許に記載された製造方法の途中工程において、開環体から得られるCF=CFOCFCFSONa、NaFなどを含む混合物中に、上記したスルホン酸塩(CF=CFOCFCFSOM)を含む上層溶液を精製することなくそのまま添加し、その後、該米国特許の方法に従って、塩素化反応を行っても良い。この様な再利用方法は、本発明方法によって得られる上層溶液を精製することなく、そのまま再利用することが可能となる点で有利である。
【0034】
【発明の効果】
本発明方法によれば、取り扱いの容易な水を溶媒として用いて、煩雑な操作を要することなく工業的に有利な方法により、目的とする含フッ素フルオロスルホニルエーテルを高収率で製造することができる。
【0035】
また、本発明方法は、得られる生成物の内で、有用な副反応生成物を容易に再利用できる点においても、非常に工業的に有利な方法である。
【0036】
【実施例】
以下、実施例を挙げて本発明を更に詳細に説明する。
【0037】
実施例1
25mlの3つ口フラスコに撹拌子、温度計差込管、蛇管式冷却管を取り付け、水5.0g、KF 4.2g、及びCF=CFOCFCFSOCl 10.5gを仕込んだ。撹拌しながら反応器を加熱し、95℃で還流させた。反応中に白色固体が発生した。2時間反応させると還流温度は81℃へ変化した。反応後、水を加え白色固体を溶解させ、二層からなる反応溶液を得た。生成物を二層に液液分離し、得られた有機層をガスクロマトグラフィー内部標準法で定量したところ、CF=CFOCFCFSOCl転化率79%、選択率92%でCF=CFOCFCFSOFが生成していることがわかった。
【0038】
また、得られた水層を19F NMR内部標準法で定量したところ、KF、KClの他にCF=CFOCFCFSOKが選択率3%で、CFCHFOCFCFSOKが選択率2%で得られたことが確認できた。CF=CFOCFCFSOFの分析結果を以下に示す。
19F NMR (CCl4, CFCl) δ 45.36 (−SO ), −84.04 (−OC −), −112.38 (−C SOF−), −120.61 (C =CF−), −135.49 (CF =CF−), −135.49 (CF=C−)
参考例1
5リットルの4つ口フラスコに撹拌機、温度計差込み管、5段オールダショーを介して接続された蒸留装置を取りつけ、スルホラン1.86kg、NaF 1.33kg、及びCF=CFOCFCFSOCl 3.26kgを仕込んだ。撹拌しながら反応器を加熱し、内温87℃,蒸留装置頭頂部温度76℃から溜出物を取り始め、頭頂部温度85℃までの溜出物を集めた。得られた無色透明液体の溜出物は純度96.2%のCF=CFOCFCFSOFで収量は2.8kg(収率88%)であった。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a fluorinated fluorosulfonylalkyl vinyl ether.
[0002]
[Prior art]
Chemical formula: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 F (where n is 0 or 1), the fluorine-containing fluorosulfonylalkyl vinyl ether is ion-exchanged. It is a compound useful as an industrial raw material such as a film material.
[0003]
As a method for producing a sulfonyl vinyl ether such as the fluorine-containing fluorosulfonylalkyl vinyl ether, for example, a method of adding hexafluoropropylene oxide to FCOCF 2 SO 2 F and then thermally decomposing the obtained acid fluoride derivative is known. (See Patent Document 1 below). However, in this method, from those obtained by adding hexafluoropropylene oxide 2 or more molecules, obtain CF 2 = CFO (CF 2 CF (CF 3) O) sulfonyl vinyl ether represented by n CF 2 CF 2 SO 2 F Although it is possible to do so, from the addition of one molecule of hexafluoropropylene oxide, the following formula:
Embedded image
Figure 2004244401
[0005]
A cyclized product represented by the following formula is generated as a main product, and almost no fluorinated fluorosulfonylalkyl vinyl ether represented by the chemical formula CF 2 CFCFOCF 2 CF 2 SO 2 F can be obtained.
[0006]
Further, FCOCF (CF 3 ) OCF 2 CF 2 SO 2 F is used as a raw material, and a cyclized product thereof is used.
Embedded image
Figure 2004244401
[0008]
Is formed, the ring is opened using CH 3 ONa to obtain CF 2 CFCFOCF 2 CF 2 SO 3 Na, and then the terminal SO 3 Na group is chlorinated to obtain CF 2 CFCFOCF 2 CF 2 SO 2 Cl. Further, a method of fluorination to convert to an SO 2 F group is also known (see Patent Document 2 below). The fluorination step described here is a method using sulfolane as a solvent and using NaF as a fluorinating agent.However, since sulfolane having a high melting point and a high boiling point is used as a solvent, it is generated by decomposition during the reaction. It is difficult to separate active components such as CF 2 = CFOCF 2 CF 2 SO 3 Na, unreacted raw material NaF, and NaCl as a by-product, and the process of recovering sulfolane and solid active components is very difficult. It gets complicated. For this reason, this method is difficult to implement industrially, and has a problem that a large amount of industrial waste is generated.
[0009]
In addition, as a method for fluorinating fluorinated sulfonic acid chloride, when C 8 F 17 SO 2 Cl, which is a compound having a perfluoroalkyl group, is used as a raw material, C 8 is fluorinated using KF to obtain C 8. It has been reported that F 17 SO 2 F can be obtained (see Non-Patent Document 1 below). In this method, in order to obtain a fluorinated product in high yield, it is necessary to use sulfolane, formamide, or the like as a solvent. However, the yield of C 8 F 17 SO 2 F is only about 25%, which is not suitable for industrial implementation.
[0010]
[Patent Document 1]
British Patent 1,034,197
[Patent Document 2]
US Patent No. 3,560,568
[Non-patent document 1]
S. Benefice-Maloet, H .; Blancou, R .; Teissedre and A. Commeyras, J .; Fluorine Chem. 31 (1986) 319-332
[0013]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned situation, and a main object of the present invention is to provide a method capable of producing a fluorine-containing fluorosulfonylalkyl vinyl ether at a low cost by an industrially advantageous method and easily and with good yield. To provide.
[0014]
[Means for Solving the Problems]
The present inventor has made intensive studies in view of the above problems. As a result, interestingly, a fluorine-containing chlorosulfonylalkyl represented by CF 2 CFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (where n is 0 or 1) When vinyl ether is used as a starting material, fluorinated fluorosulfonylalkyl vinyl ether can be obtained in a high yield by reacting with a fluorinating agent using water as a solvent. They have found that it is possible to produce fluorine-containing fluorosulfonylalkyl vinyl ethers with good efficiency, and have completed the present invention.
[0015]
That is, the present invention provides the following method for producing a fluorine-containing fluorosulfonylalkyl vinyl ether.
1. Using water as a solvent, a fluorine-containing chlorosulfonyl represented by the chemical formula: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (where n is 0 or 1) Reacting an alkyl vinyl ether with a fluorinating agent represented by the chemical formula: MF · (HF) m (wherein M is an alkali metal and m is 0 to 5) : CF 2 CFCFO (CF 2 CF (CF 3 ) O) n A method for producing a fluorine-containing fluorosulfonylalkyl vinyl ether represented by CF 2 CF 2 SO 2 F (where n is the same as above).
2. 2. The production method according to the above item 1, wherein the fluorinating agent is at least one selected from the group consisting of a compound in which M is K and a compound in which M is Na in the chemical formula: MF · (HF) m .
3. After producing a fluorinated fluorosulfonylalkyl vinyl ether by the method of the above item 1 or 2, from the resulting aqueous solution layer, the chemical formula: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 3 M ( In the formula, n is 0 or 1, and M is an alkali metal, and a sulfonic acid salt represented by the formula: CF 2 CFO (CF 2 CF (CF 3 ) O) (wherein, n as defined above) n CF 2 CF 2 SO 2 Cl is converted to the fluorine-containing chlorosulfonyl alkyl vinyl ether represented by, comprising the step of recycling as a raw material, production according to 1 or 2 Method.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
The method for producing a fluorinated fluorosulfonylalkyl vinyl ether of the present invention comprises a known substance, CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (where n is 0 or 1). Fluorinated chlorosulfonylalkyl vinyl ether represented by the formula ( 1 ), which is reacted with a fluorinating agent in an aqueous solvent to give CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 This is a method of producing a fluorine-containing fluorosulfonylalkyl vinyl ether represented by SO 2 F (where n is the same as described above).
[0017]
Chemical formula used as a raw material: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (in the formula, n is the same as above) Among the fluorine-containing chlorosulfonylalkyl vinyl ethers The compound having n = 0 can be formed into a cyclized form thereof by using a known substance, FCOCF (CF 3 ) OCF 2 CF 2 SO 2 F, as a raw material, for example, by the method described in US Pat. No. 3,560,568. After that, the ring can be opened using CH 3 ONa to obtain CF 2 CFCFOCF 2 CF 2 SO 3 Na, and then the terminal SO 3 Na group can be obtained by chlorination. As the fluorinated chlorosulfonylalkyl vinyl ether obtained by this method, an isolated and purified product may be used, or a crude reaction mixture generated by the above reaction may be used as it is.
[0018]
In the method of the present invention, it is necessary to use water as a solvent. By reacting the above-mentioned fluorinated chlorosulfonylalkyl vinyl ether with a fluorinating agent using water as a solvent, the desired fluorinated fluorosulfonylalkyl vinyl ether can be obtained with high conversion and high selectivity.
[0019]
The amount of water used is not particularly limited as long as the amount of the fluorinating agent can be uniformly dissolved or dispersed. Usually, the amount may be about 10 to 500 parts by weight based on 100 parts by weight of the fluorinated chlorosulfonylalkyl vinyl ether.
[0020]
As the fluorinating agent, a compound represented by the chemical formula: MF · (HF) m (where M is an alkali metal and m is 0 to 5) can be used. As the fluorinating agent, an alkali metal fluoride, an alkali metal acid fluoride, or the like in which M is a compound of K or M is a compound of Na in the above chemical formula is preferable. The fluorinating agent can be used alone or in combination of two or more.
[0021]
The amount of the fluorinating agent is usually about 0.5 to 10 mol, preferably about 1 to 5 mol, per mol of the fluorinated chlorosulfonylalkyl vinyl ether.
[0022]
In the production method of the present invention, other additives can be further added as necessary. Examples of such additives include water-soluble organic solvents that do not participate in the reaction, such as sulfolane, dimethylsulfoxide, and dimethylformamide, and phase transfer catalysts such as C 6 H 5 CH 2 N (CH 3 ) 3 .Cl. Inclusion molecules such as quaternary ammonium salts and quaternary phosphonium salts such as cyclic ethers such as 18-crown-6 can be used. By adding these additives, it is possible to increase the reaction rate.
[0023]
The amount of the additive to be used is preferably about 1 to 50 parts by weight with respect to 100 parts by weight of the fluorinated chlorosulfonylalkyl vinyl ether used as the raw material for the aqueous organic solvent.
[0024]
The phase transfer catalyst is preferably used in an amount of about 0.1 to 10 parts by weight based on 100 parts by weight of the fluorinated chlorosulfonylalkyl vinyl ether used as the raw material.
[0025]
In the production method of the present invention, the above-described raw material and the fluorinating agent may be reacted in an aqueous solvent. As an example of the reaction conditions, the reaction temperature may be about 10 to 200 ° C, preferably about 15 to 100 ° C. The reaction pressure may be any of reduced pressure, atmospheric pressure, and pressurized pressure, but is preferably atmospheric pressure. The reaction time is usually about 0.5 to 24 hours.
[0026]
By the above method, a fluorine-containing fluorosulfonylalkyl vinyl ether represented by a chemical formula: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 F (where n is the same as above) is obtained. Obtainable.
[0027]
The resulting crude compound is separated into two layers. The lower layer becomes a fluorine-containing fluorosulfonylalkyl vinyl ether represented by the above chemical formula, and can be purified by a known method such as distillation or column chromatography.
[0028]
The fluorinated fluorosulfonylalkyl vinyl ether thus obtained is a useful substance as a monomer component for a fuel cell electrolyte polymer.
[0029]
In the solution separated into two layers obtained by the method of the present invention, the upper layer is a sulfonic acid salt (CF 2 CFCFO (CF 2 CFCFO) obtained by hydrolyzing the fluorinated fluorosulfonylalkyl vinyl ether represented by the above chemical formula. An aqueous solution containing CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 3 M (where n is 0 or 1, and M is an alkali metal), MF, and MCl is obtained. The sulfonate and H 2 O, MF and MCl are separated from such an upper layer solution, and the obtained sulfonate is chlorinated by a known method to obtain a chemical formula which is a raw material of the method of the present invention: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (where n is the same as above) can be reused as a fluorinated chlorosulfonylalkyl vinyl ether.
[0030]
As a method for separating the sulfonate (CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 3 M) from the upper layer, a known method may be appropriately applied. A method of filtering solids present therein, a method of ultrafiltration of the upper layer solution, a method of drying the upper layer solution, dissolving it in an organic solvent, and extracting the sulfonate can be employed.
[0031]
Examples of the method for chlorinating the sulfonate (CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 3 M) include, for example, a method using PCl 5 as a chlorinating agent. be able to.
[0032]
To describe an example of this method, the charged amount of the chlorinating agent PCl 5 depends on the raw material sulfonate (CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 3 M) To about 1 to 10 times the molar amount. The reaction pressure may be any of atmospheric pressure, reduced pressure, and increased pressure. The reaction temperature is preferably about 0 to 200 ° C., and may be gradually heated as the reaction proceeds in order to accelerate the reaction. The separation method of the produced fluorinated chlorosulfonylalkyl vinyl ether represented by CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (where n is the same as described above) is based on the reaction A method is preferred in which the distillate containing the fluorinated chlorosulfonylalkyl vinyl ether is withdrawn while distilling the fluorinated chlorosulfonylalkyl vinyl ether while the reaction is completed. A method of separating may be used.
[0033]
Further, when the fluorinated chlorosulfonylalkyl vinyl ether (CF 2 CFOCF 2 CF 2 SO 2 Cl) obtained by the method described in the above-mentioned US Pat. No. 3,560,568 is used as a raw material for the method of the present invention, , in the middle step of the production method described in said US patent are obtained from the open body CF 2 = CFOCF 2 CF 2 SO 3 Na, etc. in a mixture containing NaF, the sulphonic acid salt (CF 2 = CFOCF The upper layer solution containing 2 CF 2 SO 3 M) may be added as is without purification, and then a chlorination reaction may be performed according to the method of the US patent. Such a recycling method is advantageous in that the upper layer solution obtained by the method of the present invention can be reused without purification.
[0034]
【The invention's effect】
According to the method of the present invention, the desired fluorine-containing fluorosulfonyl ether can be produced in a high yield by using an easily handleable water as a solvent and an industrially advantageous method without requiring a complicated operation. it can.
[0035]
Further, the method of the present invention is very industrially advantageous in that useful side reaction products among the obtained products can be easily reused.
[0036]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
[0037]
Example 1
A 25 ml three-necked flask was equipped with a stirrer, a thermometer insertion tube, and a coiled condenser, and charged with 5.0 g of water, 4.2 g of KF, and 10.5 g of CF 2 = CFOCF 2 CF 2 SO 2 Cl. . The reactor was heated to reflux at 95 ° C. with stirring. A white solid evolved during the reaction. After reacting for 2 hours, the reflux temperature changed to 81 ° C. After the reaction, water was added to dissolve the white solid to obtain a reaction solution having two layers. The product was liquid-liquid separated into two layers and the obtained organic layer was quantified by gas chromatography internal standard method, CF 2 = CFOCF 2 CF 2 SO 2 Cl conversion 79%, CF 2 in 92% selectivity = CFOCF 2 CF 2 SO 2 F was found to be formed.
[0038]
Also, were quantified resulting aqueous layer 19 F NMR internal standard method, KF, in addition to CF 2 = CFOCF 2 CF 2 SO 3 K selectivity of 3% KCl, CF 3 CHFOCF 2 CF 2 SO 3 It was confirmed that K was obtained at a selectivity of 2%. The analysis results of CF 2 = CFOCF 2 CF 2 SO 2 F are shown below.
19 F NMR (CCl4, CFCl 3 ) δ 45.36 (-SO 2 F), -84.04 (-OC F 2 -), -112.38 (-C F 2 SO 2 F-), -120. 61 (C F 1 F 2 = CF-), -135.49 (CF 1 F 2 = CF-), -135.49 (CF 1 F 2 = C F -)
Reference Example 1
A 5-liter four-necked flask was equipped with a stirrer, a thermometer insertion tube, and a distillation apparatus connected via a five-stage Older Show, with 1.86 kg of sulfolane, 1.33 kg of NaF, and CF 2 OCFOCF 2 CF 2 SO. 3.26 kg of 2 Cl was charged. The reactor was heated with stirring, and distillate was collected at an internal temperature of 87 ° C. and a distillation apparatus head temperature of 76 ° C., and a distillate having a head temperature of 85 ° C. was collected. The distillate of the obtained colorless and transparent liquid was CF 2 = CFOCF 2 CF 2 SO 2 F with a purity of 96.2%, and the yield was 2.8 kg (88% yield).

Claims (3)

水を溶媒として用い、化学式:CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは0又は1である)で表される含フッ素クロロスルホニルアルキルビニルエーテルを、化学式:MF・(HF)(式中、Mは、アルカリ金属であり、mは0〜5である。)で表されるフッ素化剤と反応させることを特徴とする、化学式:CF=CFO(CFCF(CF)O)CFCFSOF(式中、nは上記に同じ)で表される含フッ素フルオロスルホニルアルキルビニルエーテルの製造方法。Using water as a solvent, a fluorine-containing chlorosulfonyl represented by the chemical formula: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 2 Cl (where n is 0 or 1) Reacting an alkyl vinyl ether with a fluorinating agent represented by the chemical formula: MF · (HF) m (wherein, M is an alkali metal and m is 0 to 5) : CF 2 CFCFO (CF 2 CF (CF 3 ) O) n A method for producing a fluorine-containing fluorosulfonylalkyl vinyl ether represented by CF 2 CF 2 SO 2 F (where n is the same as above). フッ素化剤が、上記化学式:MF・(HF)において、MがKの化合物及びMがNaの化合物からなる群から選ばれた少なくとも一種である請求項1に記載の製造方法。The method according to claim 1, wherein the fluorinating agent is at least one selected from the group consisting of a compound of M and K in the chemical formula: MF · (HF) m . 請求項1又は2の方法によって含フッ素フルオロスルホニルアルキルビニルエーテルを製造した後、得られた水溶液層から化学式:CF=CFO(CFCF(CF)O)CFCFSOM(式中、nは0又は1であり、Mはアルカリ金属である)で表されるスルホン酸塩を回収し、これを塩素化して化学式:CF=CFO(CFCF(CF)O)CFCFSOCl(式中、nは上記に同じ)で表される含フッ素クロロスルホニルアルキルビニルエーテルに変換し、原料として再利用する工程を含む、請求項1又は2に記載の製造方法。After producing a fluorinated fluorosulfonylalkyl vinyl ether by the method of claim 1 or 2, a chemical formula: CF 2 CFCFO (CF 2 CF (CF 3 ) O) n CF 2 CF 2 SO 3 M ( In the formula, n is 0 or 1, and M is an alkali metal, and a sulfonic acid salt represented by the formula: CF 2 CFO (CF 2 CF (CF 3 ) O) (wherein, n as defined above) n CF 2 CF 2 SO 2 Cl is converted to the fluorine-containing chlorosulfonyl alkyl vinyl ether represented by, comprising the step of recycling as a raw material, production according to claim 1 or 2 Method.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005090270A1 (en) * 2004-03-23 2005-09-29 Daikin Industries, Ltd. Method for producing fluorine-containing halide
WO2006051697A1 (en) * 2004-11-15 2006-05-18 Daikin Industries, Ltd. Method for producing fluorine-containing fluorosulfonyl alkylvinyl ether
WO2007142266A1 (en) * 2006-06-07 2007-12-13 Daikin Industries, Ltd. Method for producing fluorinated fluorosulfonylalkyl vinyl ether

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005090270A1 (en) * 2004-03-23 2005-09-29 Daikin Industries, Ltd. Method for producing fluorine-containing halide
JPWO2005090270A1 (en) * 2004-03-23 2008-01-31 ダイキン工業株式会社 Method for producing fluorine-containing halide
US7692048B2 (en) * 2004-03-23 2010-04-06 Daikin Industries, Ltd. Method for producing fluorine-containing halide
JP4876913B2 (en) * 2004-03-23 2012-02-15 ダイキン工業株式会社 Method for producing fluorine-containing halide
WO2006051697A1 (en) * 2004-11-15 2006-05-18 Daikin Industries, Ltd. Method for producing fluorine-containing fluorosulfonyl alkylvinyl ether
WO2007142266A1 (en) * 2006-06-07 2007-12-13 Daikin Industries, Ltd. Method for producing fluorinated fluorosulfonylalkyl vinyl ether

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