JP4290093B2 - Method for producing fluorine-containing ether compound - Google Patents

Method for producing fluorine-containing ether compound Download PDF

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JP4290093B2
JP4290093B2 JP2004228176A JP2004228176A JP4290093B2 JP 4290093 B2 JP4290093 B2 JP 4290093B2 JP 2004228176 A JP2004228176 A JP 2004228176A JP 2004228176 A JP2004228176 A JP 2004228176A JP 4290093 B2 JP4290093 B2 JP 4290093B2
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JP2005068142A (en
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覚 岡本
良一 玉井
泰雄 日比野
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Central Glass Co Ltd
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Description

本発明は、ハイドロフルオロエーテルの製造法に関する。本発明により製造されたハイドロフルオロエーテル(HFE)はハイドロフルオロカーボン(HFC)にかわる硬質ポリウレタンの発泡剤等として有用である。   The present invention relates to a method for producing a hydrofluoroether. The hydrofluoroether (HFE) produced according to the present invention is useful as a foaming agent for rigid polyurethane that replaces hydrofluorocarbon (HFC).

含フッ素エーテルの製造法として、塩基性触媒の存在下、含フッ素オレフィン化合物とアルコールを反応させることが知られている。例えば、非特許文献1には、テトラフルオロエチレンとアルコール化合物をナトリウムアルコキサイドの存在下に反応させ1−アルコキシ−1,1,2,2−テトラフルオロエタンを製造する方法が開示されている。この方法では、反応を進行させるために高圧を要しているが、高圧という厳しい条件下にもかかわらず、反応速度は小さく生産性に問題がある。また、高圧条件下では、テトラフルオロエチレンは爆発性を有するため安全性にも問題があるばかりでなく、高圧反応用の設備が必要となりコスト的にも問題がある。
J.Am.Chem.Soc.,Vol.73,1329(1951)
As a method for producing a fluorinated ether, it is known to react a fluorinated olefin compound with an alcohol in the presence of a basic catalyst. For example, Non-Patent Document 1 discloses a method for producing 1-alkoxy-1,1,2,2-tetrafluoroethane by reacting tetrafluoroethylene with an alcohol compound in the presence of sodium alkoxide. . In this method, a high pressure is required to advance the reaction, but the reaction rate is small and there is a problem in productivity despite the severe condition of high pressure. In addition, under high pressure conditions, tetrafluoroethylene has an explosive property, so that there is a problem in safety as well as a problem in terms of cost because equipment for high pressure reaction is required.
J. et al. Am. Chem. Soc. , Vol. 73, 1329 (1951)

本発明は、安全性が高く製造コストが安価なハイドロフルオロエーテルの製造方法を提供することにある。   An object of the present invention is to provide a method for producing a hydrofluoroether having high safety and low production cost.

本発明者らは上記問題を解決すべく各種フルオロエーテルの工業的に有用な製造方法を鋭意検討した結果、非プロトン性極性溶媒を用いることによりフルオロエーテルを塩基性触媒存在下、常圧から微加圧の温和な条件で製造する方法を見いだし本発明に至った。   As a result of intensive investigations on industrially useful production methods for various fluoroethers in order to solve the above problems, the present inventors have used aprotic polar solvents to remove fluoroethers from normal pressure in the presence of a basic catalyst. The inventors have found a method for producing under mild conditions of pressurization and have reached the present invention.

すなわち本発明は、一般式(2)
ROH(2)
(ただし、Rは炭素数1〜6のアルキル基を示す。)で表されるアルコールと一般式(1)
CFCF (1)
(ただし、Rはフッ素原子またはトリフルオロメチル基を示す。)で表されるフルオロアルケンを非プロトン性極性溶媒および、塩基性触媒として、アルカリ金属水酸化物またはアルカリ金属アルコキサイド存在下で反応させることを特徴とする一般式(3)
CHFCFOR (3)
(ただし、Rはフッ素原子またはトリフルオロメチル基を示し、Rは炭素数1〜6の鎖状アルキル基を示す。)で表されるフルオロエーテルの製造方法である。
That is, the present invention relates to the general formula (2)
ROH (2)
(Wherein R represents an alkyl group having 1 to 6 carbon atoms) and the alcohol represented by the general formula (1)
R f CFCF 2 (1)
(Wherein R f represents a fluorine atom or a trifluoromethyl group), and is reacted in the presence of an alkali metal hydroxide or an alkali metal alkoxide as an aprotic polar solvent and a basic catalyst . General formula (3) characterized by
R f CHFCF 2 OR (3)
(Wherein R f represents a fluorine atom or a trifluoromethyl group, and R represents a chain alkyl group having 1 to 6 carbon atoms).

また、本発明は、非プロトン性極性溶媒はジメチルスルホキシド(DMSO)、ジメチルアセトアミド(DMAc)、ジメチルホルムアミド(DMF)、ニトロメタン、アセトニトリル、ヘキサメチルホスホリックトリアミド(HMPA)、グライム、ジグライム、ジエチルエーテル、テトラヒドロフラン(THF)、1,4−ジオキサンからなる群より選ばれる少なくとも1種であることを特徴とする上記の製造方法である。   In the present invention, the aprotic polar solvent is dimethyl sulfoxide (DMSO), dimethylacetamide (DMAc), dimethylformamide (DMF), nitromethane, acetonitrile, hexamethylphosphoric triamide (HMPA), glyme, diglyme, diethyl ether. , Tetrahydrofuran (THF), 1,4-dioxane. The production method described above, wherein the production method is at least one selected from the group consisting of 1,4-dioxane.

本発明の製造方法により、フルオロエーテルを安全且つ低コストで製造することができる。   By the production method of the present invention, the fluoroether can be produced safely and at low cost.

本発明のハイドロフルオロエーテルの製造は、下記の反応式に従う。   The production of the hydrofluoroether of the present invention follows the following reaction formula.

CF=CF + ROH → RCHFCFOR
(式中、Rはフッ素原子またはトリフルオロメチル基を示し、Rは炭素数1〜6の鎖状アルキル基を示す。)
たとえば
CF=CF + ROH → CHFCFOR
CFCF=CF + ROH → CFCHFCF2OR
(式中、Rは炭素数1〜6の鎖状アルキル基を示す。)
本発明の原料の一つは、一般式(1)
CF=CF (1)
(ただし、Rはフッ素原子またはトリフルオロメチル基を示す。)で表されるフルオロオレフィンであり、具体的にはCF=CF、CFCF=CFである。
R f CF = CF 2 + ROH → R f CHFCF 2 OR
(In the formula, R f represents a fluorine atom or a trifluoromethyl group, and R represents a chain alkyl group having 1 to 6 carbon atoms.)
For example, CF 2 = CF 2 + ROH → CHF 2 CF 2 OR
CF 3 CF = CF 2 + ROH → CF 3 CHFCF 2 OR
(In the formula, R represents a chain alkyl group having 1 to 6 carbon atoms.)
One of the raw materials of the present invention is represented by the general formula (1)
R f CF = CF 2 (1)
(Wherein R f represents a fluorine atom or a trifluoromethyl group), specifically CF 2 = CF 2 and CF 3 CF = CF 2 .

原料であるフルオロオレフィンの製造に関しては特に限定されないが、クロロジフルオロメタンの熱分解反応によりテトラフルオロエチレンあるいはヘキサフルオロプロペンを製造する方法が知られている。それぞれ蒸留分離することにより、精製したテトラフルオロエチレン、ヘキサフルオロプロペンを得ることも可能であるが、クロロジフルオロメタンの熱分解反応粗生成物をそのまま反応原料として用いることもできる。   The production of the fluoroolefin as a raw material is not particularly limited, but a method for producing tetrafluoroethylene or hexafluoropropene by a thermal decomposition reaction of chlorodifluoromethane is known. It is possible to obtain purified tetrafluoroethylene and hexafluoropropene by distillation separation, respectively, but the thermal decomposition reaction crude product of chlorodifluoromethane can be used as a reaction raw material as it is.

本発明のもう一つの原料であるアルコールは、一般式
ROH (2)
(式中、Rは炭素数1〜6の鎖状アルキル基を示す。)で表されるアルコールで、具体的には、メタノール、エタノール、プロパノール、イソプロパノール、n−ブタノール、s−ブタノール、t−ブタノール等が挙げられる。用いるアルコールの量は、フルオロオレフィンに対して1.2モル当量〜1.5モル当量必要である。
The alcohol which is another raw material of the present invention has the general formula ROH (2)
(Wherein R represents a linear alkyl group having 1 to 6 carbon atoms), specifically, methanol, ethanol, propanol, isopropanol, n-butanol, s-butanol, t- Examples include butanol. The amount of alcohol used should be 1.2 to 1.5 molar equivalents relative to the fluoroolefin.

本発明の特徴は、上記反応を非プロトン性極性溶媒中で行うことにある。係る溶媒を用いることにより、反応活性種であるアルコキサイドアニオンを活性化することができると考えられる。それにより、反応性が著しく向上し、短時間でしかも高収率で目的とするハイドロフルオロエーテルを得ることができる。   A feature of the present invention is that the above reaction is carried out in an aprotic polar solvent. By using such a solvent, it is considered that the alkoxide anion which is a reactive species can be activated. Thereby, the reactivity is remarkably improved, and the desired hydrofluoroether can be obtained in a short time and in a high yield.

本発明の製造方法で用いる非プロトン性極性溶媒としては、特に限定されないが、ジメチルスルホキシド(DMSO)、ジメチルアセトアミド(DMAc)、ジメチルホルムアミド(DMF)、ニトロメタン、アセトニトリル、ヘキサメチルホスホリックトリアミド(HMPA)、グライム、ジグライム、ジエチルエーテル、テトラヒドロフラン(THF)、1,4−ジオキサン等の溶媒が挙げられ、ジメチルスルホキシド(DMSO)、ジメチルアセトアミド(DMAc)、ジメチルホルムアミド(DMF)等を好適に用いることができる。   The aprotic polar solvent used in the production method of the present invention is not particularly limited, but dimethyl sulfoxide (DMSO), dimethylacetamide (DMAc), dimethylformamide (DMF), nitromethane, acetonitrile, hexamethylphosphoric triamide (HMPA) ), Glyme, diglyme, diethyl ether, tetrahydrofuran (THF), 1,4-dioxane and the like, and dimethyl sulfoxide (DMSO), dimethylacetamide (DMAc), dimethylformamide (DMF) and the like are preferably used. it can.

用いる溶媒の量は、アルコールに対して10mol%〜50mol%、好ましくは20mol%〜40mol%がよい。溶媒の量が少なすぎると、反応速度が低下し充分なフルオロオレフィンが供給できなくなるので好ましくなく、逆に多すぎると反応容器に導入できる反応資材の量が少なくなるので好ましくない。なお、反応系内の水の存在は反応の進行を妨げるので好ましくない。溶媒はあらかじめ、乾燥、脱水しておくことが好ましい。   The amount of the solvent used is 10 mol% to 50 mol%, preferably 20 mol% to 40 mol%, based on the alcohol. If the amount of the solvent is too small, it is not preferable because the reaction rate decreases and sufficient fluoroolefin cannot be supplied. On the other hand, if the amount is too large, the amount of the reaction material that can be introduced into the reaction vessel decreases. The presence of water in the reaction system is not preferable because it hinders the progress of the reaction. The solvent is preferably dried and dehydrated in advance.

本反応は界面活性剤を添加することにより原料のフルオロオレフィンを反応混合液に溶解させやすくすることができる。界面活性剤の種類としては、ハイドロカーボンアクリレートペルフルオロカーボンアクリレートコポリマー系ではEF−351、EF−352、EF−801、EF−802(株式会社ジェムコ製)、ジクリセリンEO付加物ベルフルオロノネニルエーテル系ではFTX−218(株式会社ネオス製)、α−ベルフルオロノネニルオキシ−ω−メチルポリエチレンオキシド系ではFT−250、FT−251(株式会社ネオス製)等のフッ素系界面活性剤等が使用できる。界面活性剤の添加量は、溶媒に対して0.1から10重量パーセント添加するのがよく、好ましくは1から5重量パーセント添加するのがよい。界面活性剤の量が少なすぎるとフルオロオレフィンの反応混合液への溶け込みが充分でなく、多すぎると溶解せずに沈殿してしまうので好ましくない。   In this reaction, the raw material fluoroolefin can be easily dissolved in the reaction mixture by adding a surfactant. Surfactant types include EF-351, EF-352, EF-801, EF-802 (manufactured by Gemco Co., Ltd.) for the hydrocarbon acrylate perfluorocarbon acrylate copolymer system, and difluoroserine EO adduct berfluorononenyl ether system. Fluorosurfactants such as FT-250 and FT-251 (manufactured by Neos) can be used for FTX-218 (manufactured by Neos) and α-berfluorononenyloxy-ω-methylpolyethylene oxide. The surfactant is added in an amount of 0.1 to 10 percent by weight, preferably 1 to 5 percent by weight, based on the solvent. If the amount of the surfactant is too small, the fluoroolefin is not sufficiently dissolved in the reaction mixture, and if the amount is too large, it is not preferable because it precipitates without dissolving.

本反応における塩基性触媒としては、上記の反応を効率的に進ませる塩基であれば、特に限定されないが、アルカリ金属水酸化物、アルカリ金属アルコキサイド等が挙げられる。   The basic catalyst in this reaction is not particularly limited as long as it is a base that efficiently promotes the above reaction, and examples thereof include alkali metal hydroxides and alkali metal alkoxides.

アルカリ金属水酸化物としては、水酸化ナトリウム、水酸化カリウム等が好ましく、アルカリ金属アルコキサイドとしては、ナトリウムメトキサイド、ナトリウムエトキサイド等が好ましい。用いる塩基性触媒の量は、フルオロオレフィンに対して0.1mol%〜15mol%の範囲で反応を行うことができ、好ましくは5mol%〜10mol%がよい。塩基性触媒の量が少なすぎると反応速度が遅く、多すぎると副反応が進行し好ましくない。   As the alkali metal hydroxide, sodium hydroxide, potassium hydroxide and the like are preferable, and as the alkali metal alkoxide, sodium methoxide, sodium ethoxide and the like are preferable. The amount of the basic catalyst used can be reacted in the range of 0.1 mol% to 15 mol% with respect to the fluoroolefin, and preferably 5 mol% to 10 mol%. If the amount of the basic catalyst is too small, the reaction rate is slow, and if it is too large, the side reaction proceeds, which is not preferable.

本発明における反応圧力は特に限定されないが、あまり高圧の場合、装置的にも安全性にも問題が生じる。反応圧力としては、0MPa〜1MPa(ゲージ圧)が一般的であり、好ましくは、0MPa〜0.5MPa(ゲージ圧)である。本発明においては、常圧から微加圧の温和な圧力条件で目的とするHFEを製造することができる。   The reaction pressure in the present invention is not particularly limited. However, when the pressure is too high, there are problems in terms of apparatus and safety. The reaction pressure is generally 0 MPa to 1 MPa (gauge pressure), preferably 0 MPa to 0.5 MPa (gauge pressure). In the present invention, the target HFE can be produced under mild pressure conditions from normal pressure to slight pressure.

反応温度は、特に制限されるものではないが比較的マイルドな温度条件で行うことができ、0℃〜50℃の範囲であり、好ましくは10℃〜40℃、更に好ましくは20℃〜30℃がよい。反応温度が低すぎると反応が進行せず、高すぎると副反応が進行し、好ましくない。   The reaction temperature is not particularly limited, but can be performed under relatively mild temperature conditions, and is in the range of 0 ° C. to 50 ° C., preferably 10 ° C. to 40 ° C., more preferably 20 ° C. to 30 ° C. Is good. If the reaction temperature is too low, the reaction does not proceed. If it is too high, the side reaction proceeds, which is not preferable.

ここで、本発明において、溶媒の導入方法に関しては特に限定されないが、反応容器中に原料の塩基性触媒およびアルコールと一緒に溶媒を導入しておき、充分に窒素置換した後にフルオロオレフィンを導入する方法が一般的に用いられる。反応速度を高めるためには、フルオロオレフィンは反応液中に導入し、グラスフィルター等を用いて微細な気泡を形成し、フルオロオレフィンと反応液の接触効率を高めることが重要である。また強撹拌を行うことによりフルオロオレフィンの滞留時間を稼ぐのも有効である。フルオロオレフィンの導入量は、反応器の形状、大きさ、溶媒の種類、反応液の組成等で変わってくるがフルオロオレフィンが反応液に全て吸収される量が適当である。反応によって得られるハイドロフルオロエーテルは比較的沸点が低く反応温度に近いため、凝縮器を用いて反応を行う。   Here, in the present invention, the method for introducing the solvent is not particularly limited, but the solvent is introduced into the reaction vessel together with the basic catalyst and alcohol as raw materials, and after sufficiently purging with nitrogen, the fluoroolefin is introduced. The method is commonly used. In order to increase the reaction rate, it is important to introduce the fluoroolefin into the reaction solution, form fine bubbles using a glass filter or the like, and increase the contact efficiency between the fluoroolefin and the reaction solution. It is also effective to increase the residence time of the fluoroolefin by vigorous stirring. The amount of fluoroolefin to be introduced varies depending on the shape and size of the reactor, the type of solvent, the composition of the reaction solution, and the like, but an amount in which all of the fluoroolefin is absorbed by the reaction solution is appropriate. Since the hydrofluoroether obtained by the reaction has a relatively low boiling point and is close to the reaction temperature, the reaction is performed using a condenser.

以下に本発明の実施例を挙げて具体的に説明するが、これらの実施例によって本発明が限定されるものではない。
[実施例1] 1−メトキシ−1,1,2,2−テトラフルオロエタンの合成例
100ミリリットルの硝子製の反応器に−20℃の冷媒を循環させた凝縮器を取り付けた。反応器の略図を[図1]に示した。反応器に水酸化カリウム5.54g(0.099mol)、メタノール19.20g(0.6mol)、溶媒としてDMSO20.08g(0.257mol)を仕込み、十分に窒素置換した。反応器をウォーターバスに浸し、水温を25℃に保持した。マグネチックスターラーで強撹拌し、常圧でテトラフルオロエチレンを液中にフィードした。反応は、発熱的に進行した。反応器をすり抜けた未反応の原料を回収するため深冷トラップを用いたが液は回収されなかった。反応時間6時間、原料を17.49g(0.175mol)フィードしたところで反応を終了した。反応粗液をガスクロマトクラフィーで分析し、内部標準法で生成物の収率を算出した。テトラフルオロエチレン基準の1−メトキシ−1,1,2,2−テトラフルオロエタンの収率は98.2%であった。
[実施例2] 1−メトキシ−1,1,2,2−テトラフルオロエタンの合成例
100ミリリットルの硝子製の反応器に−20℃の冷媒を循環させた凝縮器を取り付けた。反応器の略図を[図1]に示した。反応器に水酸化カリウム5.54g(0.099mol)、メタノール19.20g(0.6mol)、溶媒としてDMAc22.36g(0.257mol)を仕込み、十分に窒素置換した。反応器をウォーターバスに浸し、水温を25℃に保持した。マグネチックスターラーで強撹拌し、常圧でテトラフルオロエチレンを液中にフィードした。反応は、発熱的に進行した。反応器をすり抜けた未反応の原料を回収するため深冷トラップを用いたが液は回収されなかった。反応時間3時間、原料を8.96g(0.0896mol)フィードしたところで反応を終了した。反応粗液をガスクロマトクラフィーで分析し、内部標準法で生成物の収率を算出した。テトラフルオロエチレン基準の1−メトキシ−1,1,2,2−テトラフルオロエタンの収率は85.8%であった。
[実施例3] 1−メトキシ−1,1,2,2−テトラフルオロエタンの合成例
100ミリリットルの硝子製の反応器に−20℃の冷媒を循環させた凝縮器を取り付けた。反応器の略図を[図1]に示した。反応器に水酸化カリウム5.54g(0.099mol)、メタノール19.20g(0.6mol)、溶媒としてジクライム34.48g(0.257mol)を仕込み、十分に窒素置換した。反応器をウォーターバスに浸し、水温を25℃に保持した。マグネチックスターラーで強撹拌し、常圧でテトラフルオロエチレンを液中にフィードした。反応は、発熱的に進行した。反応器をすり抜けた未反応の原料を回収するため深冷トラップを用いたが液は回収されなかった。反応時間3時間、原料を9.05g(0.0905mol)フィードしたところで反応を終了した。反応粗液をガスクロマトクラフィーで分析し、内部標準法で生成物の収率を算出した。テトラフルオロエチレン基準の1−メトキシ−1,1,2,2−テトラフルオロエタンの収率は94.4%であった。
Examples of the present invention will be specifically described below, but the present invention is not limited to these examples.
[Example 1] Synthesis example of 1-methoxy-1,1,2,2-tetrafluoroethane A condenser in which a refrigerant at -20 ° C was circulated was attached to a 100 ml glass reactor. A schematic diagram of the reactor is shown in FIG. A reactor was charged with 5.54 g (0.099 mol) of potassium hydroxide, 19.20 g (0.6 mol) of methanol, and 20.08 g (0.257 mol) of DMSO as a solvent, and sufficiently purged with nitrogen. The reactor was immersed in a water bath and the water temperature was maintained at 25 ° C. The mixture was vigorously stirred with a magnetic stirrer, and tetrafluoroethylene was fed into the liquid at normal pressure. The reaction proceeded exothermically. A cryogenic trap was used to recover the unreacted raw material that had passed through the reactor, but no liquid was recovered. The reaction was terminated when 17.49 g (0.175 mol) of raw material was fed for a reaction time of 6 hours. The reaction crude liquid was analyzed by gas chromatography, and the yield of the product was calculated by an internal standard method. The yield of 1-methoxy-1,1,2,2-tetrafluoroethane based on tetrafluoroethylene was 98.2%.
[Example 2] Synthesis example of 1-methoxy-1,1,2,2-tetrafluoroethane A condenser in which a -20 ° C refrigerant was circulated was attached to a 100 ml glass reactor. A schematic diagram of the reactor is shown in FIG. A reactor was charged with 5.54 g (0.099 mol) of potassium hydroxide, 19.20 g (0.6 mol) of methanol, and 22.36 g (0.257 mol) of DMAc as a solvent, and sufficiently purged with nitrogen. The reactor was immersed in a water bath and the water temperature was maintained at 25 ° C. The mixture was vigorously stirred with a magnetic stirrer, and tetrafluoroethylene was fed into the liquid at normal pressure. The reaction proceeded exothermically. A cryogenic trap was used to recover the unreacted raw material that had passed through the reactor, but no liquid was recovered. The reaction was completed when 8.96 g (0.0896 mol) of raw material was fed for a reaction time of 3 hours. The reaction crude liquid was analyzed by gas chromatography, and the yield of the product was calculated by an internal standard method. The yield of 1-methoxy-1,1,2,2-tetrafluoroethane based on tetrafluoroethylene was 85.8%.
[Example 3] Synthesis example of 1-methoxy-1,1,2,2-tetrafluoroethane A condenser in which a -20 ° C refrigerant was circulated was attached to a 100 ml glass reactor. A schematic diagram of the reactor is shown in FIG. A reactor was charged with 5.54 g (0.099 mol) of potassium hydroxide, 19.20 g (0.6 mol) of methanol, and 34.48 g (0.257 mol) of diclime as a solvent, and sufficiently purged with nitrogen. The reactor was immersed in a water bath and the water temperature was maintained at 25 ° C. The mixture was vigorously stirred with a magnetic stirrer, and tetrafluoroethylene was fed into the liquid at normal pressure. The reaction proceeded exothermically. A cryogenic trap was used to recover the unreacted raw material that had passed through the reactor, but no liquid was recovered. The reaction was terminated when 9.05 g (0.0905 mol) of raw material was fed for 3 hours. The reaction crude liquid was analyzed by gas chromatography, and the yield of the product was calculated by an internal standard method. The yield of 1-methoxy-1,1,2,2-tetrafluoroethane based on tetrafluoroethylene was 94.4%.

本発明の方法を実施するのに好適な反応装置の模式図である。It is a schematic diagram of a reactor suitable for carrying out the method of the present invention.

符号の説明Explanation of symbols

1.クロロジフルオロメタンボンベ
2.テトラフルオロエチレンボンベ
3.磁気攪拌機
4.ガラス製反応器
5.グラスフィルター
6.凝縮器
7.深冷トラップ
1. Chlorodifluoromethane cylinder
2. Tetrafluoroethylene cylinder
3. Magnetic stirrer
4). Glass reactor
5. Glass filter
6). Condenser
7). Deep cold trap

Claims (2)

一般式(2)
ROH (2)
(ただし、Rは炭素数1〜6のアルキル基を示す。)で表されるアルコールと一般式(1)
CF=CF(1)
(ただし、Rはフッ素原子またはトリフルオロメチル基を示す。)で表されるフルオロオレフィンを非プロトン性極性溶媒および、塩基性触媒として、アルカリ金属水酸化物またはアルカリ金属アルコキサイド存在下で反応させることを特徴とする一般式(3)
CHFCFOR (3)
(ただし、Rはフッ素原子またはトリフルオロメチル基を示し、Rは炭素数1〜6の鎖状アルキル基を示す。)で表されるフルオロエーテルの製造方法。
General formula (2)
ROH (2)
(Wherein R represents an alkyl group having 1 to 6 carbon atoms) and the alcohol represented by the general formula (1)
R f CF = CF 2 (1)
(Wherein R f represents a fluorine atom or a trifluoromethyl group), and the reaction is carried out in the presence of an alkali metal hydroxide or an alkali metal alkoxide as an aprotic polar solvent and a basic catalyst . General formula (3) characterized by
R f CHFCF 2 OR (3)
(Wherein Rf represents a fluorine atom or a trifluoromethyl group, and R represents a chain alkyl group having 1 to 6 carbon atoms).
非プロトン性極性溶媒がジメチルスルホキシド(DMSO)、ジメチルアセトアミド(DMAc)、ジメチルホルムアミド(DMF)、ニトロメタン、アセトニトリル、ヘキサメチルホスホリックトリアミド(HMPA)、グライム、ジグライム、ジエチルエーテル、テトラヒドロフラン(THF)、1,4−ジオキサンからなる群より選ばれる少なくとも1種であることを特徴とする請求項1に記載の製造方法。 Aprotic polar solvents are dimethyl sulfoxide (DMSO), dimethylacetamide (DMAc), dimethylformamide (DMF), nitromethane, acetonitrile, hexamethylphosphoric triamide (HMPA), glyme, diglyme, diethyl ether, tetrahydrofuran (THF), The production method according to claim 1, wherein the production method is at least one selected from the group consisting of 1,4-dioxane.
JP2004228176A 2003-08-05 2004-08-04 Method for producing fluorine-containing ether compound Expired - Fee Related JP4290093B2 (en)

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