WO2002018307A1 - Process for producing fluoroalcohol compound - Google Patents

Process for producing fluoroalcohol compound Download PDF

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Publication number
WO2002018307A1
WO2002018307A1 PCT/JP2001/006073 JP0106073W WO0218307A1 WO 2002018307 A1 WO2002018307 A1 WO 2002018307A1 JP 0106073 W JP0106073 W JP 0106073W WO 0218307 A1 WO0218307 A1 WO 0218307A1
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Prior art keywords
methanol
fluorinated alcohol
base
formula
water
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PCT/JP2001/006073
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French (fr)
Japanese (ja)
Inventor
Toru Yoshizawa
Shouji Takaki
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Daikin Industries, Ltd.
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Publication of WO2002018307A1 publication Critical patent/WO2002018307A1/en

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/32Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring increasing the number of carbon atoms by reactions without formation of -OH groups

Definitions

  • the present invention relates to a method for producing a fluorine-containing alcohol compound.
  • the telomer mixture obtained by this method cannot remove evaporation residues of several hundred ppm even by purification by distillation.
  • the telomer mixture obtained by this method cannot remove evaporation residues of several hundred ppm even by purification by distillation.
  • it is not suitable for producing a high-quality information recording medium due to the influence of evaporation residue.
  • a fluorinated alcohol having a low impurity content can be obtained by a method of distilling the telomer mixture in the presence of a base or after bringing the telomer mixture into contact with the base (Japanese Patent No. 3029618).
  • Japanese Patent No. 3029618 Japanese Patent No. 30296178
  • a fluorinated alcohol having a lower impurity content is desired.
  • a main object of the present invention is to manufacture information recording media (optical discs such as CD-R and DVD-R) having a recording layer on which information can be written and / or read by a laser on a substrate. It is an object of the present invention to provide a method for producing a fluorine-containing alcohol which is substantially free from impurities.
  • the present inventor has conducted intensive studies in view of the above-described problems, and as a result, obtained a reaction crude product obtained by reacting tetrafluoroethylene with methanol in the presence of a base and water or in contact with a base and water. After that, the amount of impurities is further reduced as compared with the case where the crude reaction product is distilled in the presence of or in contact with a base. And found that it was possible to obtain a fluorinated alcohol substantially free of impurities, and completed the present invention.
  • the present invention provides the following method for producing a fluorinated alcohol.
  • n 1 or 2
  • the method comprises the following steps (i) to (iv): (i) reacting tetrafluoroethylene with methanol;
  • reaction crude product is distilled, methanol obtained from the top of the distillation column is returned to the reactor and reused, and the formula (1) obtained as the bottom component is obtained.
  • the method of recovering HCF 2 CF 2 CH 2 OH in the step (V) is as follows: after distilling components containing HCF 2 CF 2 CH 2 OH to remove low boiling components, The component containing HCF 2 CF 2 CH 2 OH obtained as the bottom component was A method for producing a fluorinated alcohol, which is a method of recovering HCF 2 CF 2 CH 2 OH by distillation.
  • a method for producing a fluorinated alcohol which is a method of recovering HCF 2 CF 2 CH 2 OH by distillation.
  • first, tetrafluoroethylene and methanol are reacted in the presence of a radical generation source to obtain the following formula (1)
  • n is 1 or 2.
  • the radical generating source at least one selected from the group consisting of a reaction initiator, UV and heat can be used.
  • the radical source is UV
  • UV for example, UV from a medium or high pressure mercury lamp can be used.
  • the radical generating source is heat, heating may be performed at a temperature of 250 to 300.
  • the reaction initiator a peroxide can be exemplified, and a reaction initiator having a half-life at the reaction temperature of about 10 hours is preferably exemplified.
  • Preferred reaction initiators are perbutyl D (di-tert-butyl peroxyside), perbutyl II (t-butyl peroxy-12-ethylhexanoate), and perbutyl I (t-butyl peroxyisopropyl carbonate). Etc. can be exemplified.
  • the amount of the reaction initiator used is usually about 0.005 to 0.1 mol per 1 mol of tetrafluoroethylene.
  • reaction temperature may be about 40 to 1401: about
  • reaction time may be about 3 to 12 hours
  • reaction pressure may be about 0.2 to 1.2 MPa.
  • the reaction can be performed, for example, in a high-pressure reactor. It is preferable to replace the inside of the reaction system with an inert gas such as nitrogen or argon.
  • the production reaction of the fluorinated alcohol is preferably performed in the presence of an acid acceptor.
  • the acid acceptor examples include carbonates and bicarbonates of alkali metals or alkaline earth metals such as calcium carbonate, magnesium carbonate, sodium carbonate, lithium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, calcium oxide, and calcium hydroxide. , Soda lime, barium carbonate and the like.
  • the acid acceptor is preferably one that can trap an acid such as HF generated during the reaction without making the reaction system strongly alkaline.
  • the amount of the acid acceptor used is not particularly limited, but 1 mole of tetrafluoroethylene The amount may be about 0.001 to 0.1 mol.
  • the obtained reaction crude product is treated in the presence of a base and water, or a base. And after contacting with water, distillation is carried out to obtain a fluorinated alcohol containing substantially no evaporation residue.
  • a base having a pKb of 2 or less is preferable.
  • bases include, for example, alkali metal alcoholates such as sodium methylate, sodium ethylate, sodium propylate, potassium t-butoxide, lithium ethylate, and alkali metals such as sodium hydroxide, potassium hydroxide, and lithium hydroxide.
  • alkali metal alcoholates such as sodium methylate, sodium ethylate, sodium propylate, potassium t-butoxide, lithium ethylate
  • alkali metals such as sodium hydroxide, potassium hydroxide, and lithium hydroxide.
  • Examples include hydroxide, calcium hydroxide, aluminum hydroxide, barium hydroxide, magnesium hydroxide, and soda lime. Of these, alkali metal alcoholates are particularly preferred.
  • the amount of the base to be used is preferably about 0.1 to 10 parts by weight, more preferably about 1 to 3 parts by weight, based on 100 parts by weight of the fluorinated alcohol.
  • the amount of water used is preferably about 0.1 to 10 parts by weight, more preferably about 1 to 3 parts by weight, based on 100 parts by weight of the fluorinated alcohol. No.
  • the base and water may be added to the middle stage of the distillation column or to the still.
  • a treatment tank base treatment tank
  • the operating conditions in the base treatment tank are not particularly limited, but usually, after the addition of the base, the reaction may be performed at about 20 to about 50 ° C. for about 0.5 to 3 hours. .
  • This distillation treatment may be performed after the reaction crude product is distilled to remove excess methanol.
  • methanol is distilled off from the top of the distillation column, and fluorine-containing alcohol is contained in the bottom liquid.
  • the obtained methanol can be used effectively by returning it to the reactor and reusing it.
  • the reaction product of the acid acceptor such as CaF 2 and NaF and the unreacted acid acceptor are removed from the crude reaction product.
  • the reaction product of the acid acceptor and the unreacted acid acceptor which are solid components, can be removed from the crude reaction product.For example, by using a centrifuge, It can be removed efficiently.
  • excess methanol is removed from the crude reaction product by a method such as distillation.
  • the tetrafluoropropanol separated and recovered is as follows. According to the conditions described above, tetrafluoropropanol may be recovered by distillation in the presence of a base and water, or after contact with a base and water.
  • Tetrafluoropropanol substantially free of impurities can be obtained by distilling tetrafluoropropanol in the presence of a base and water, or after bringing it into contact with a base and water, followed by distillation.
  • substantially free of impurities means that the evaporation residue of the fluoroalcohol is 50 ppm or less, preferably 25 ppm or less, more preferably 10 ppm or less.
  • the absorbance in methanol (205 nm), which is an indicator of the content of evaporation residue, is 0.1 abs or less, preferably -0.1 abs or less, more preferably -0.2 abs or less. More preferably, it is less than 0.4 abs.
  • the evaporation residue is obtained by measuring the weight of the residue obtained when the fluorinated alcohol is concentrated at 40 :, 5 mmHg (0.665 kPa), and the ss, p pm relative to HCF 2 CF 2 CH 2 OH is measured.
  • the absorbance in methanol is measured using a sample obtained by adding 3 ml of methanol to lm 1 of the fluorinated alcohol of the general formula (1), and using methanol as a reference.
  • the tetrafluoropropanol substantially free from impurities obtained by the method of the present invention can be used, for example, to produce an information recording medium in which a substrate is provided with a recording layer on which information can be written and Z or readable by a laser. It is suitable as a solvent at that time.
  • An information recording medium in which a recording layer capable of writing and Z or reading information by a laser is provided on a substrate is a solvent containing tetrafluoropropanol obtained by the method of the present invention, preferably tetrafluoropropanol.
  • a dye can be produced by dissolving a dye in a fluorinated solvent containing olopropanol and using the resulting solution to form a recording layer containing a dye by a method such as coating and drying on a substrate according to a conventional method.
  • the dye include cyanine dyes, phthalocyanine dyes, pyrylium dyes, thiopyrylium dyes, squarylium dyes, azurenium dyes, indophenol dyes, Indoor dyes, triphenylmethane dyes, quinone dyes, aluminum dyes, diimmonium dyes, metal complex dyes, and the like.
  • the substrate examples include plastics such as polycarbonate, polymethyl methacrylate, epoxy resin, amorphous polyolefin, polyester, and polyvinyl chloride, glass, and ceramics.
  • An undercoat layer may be provided between the recording layer and the substrate for the purpose of improving flatness, improving adhesive strength, preventing deterioration of the recording layer, and a protective layer may be provided on the recording layer. .
  • the tetrafluoropropanol separated and recovered by the method of the present invention does not substantially contain impurities, and has an information recording structure in which a recording layer on which information can be written and / or read by a laser is provided on a substrate. It is a suitable solvent for producing media (such as optical discs such as CD-R and DVD-R) and film photoreceptors.
  • FIG. 1 is a flowchart showing a continuous distillation step in Example 1.
  • 1 is a reaction vessel
  • 2 is a centrifuge
  • 3 is a first distillation column
  • 4 is a second distillation column
  • 5 is a base treatment tank
  • 6 is an alkali distillation column
  • 7 is an alkali distillation column.
  • a high-pressure reactor was charged with methanol (2 liters), perbutyl D (45 g) and calcium carbonate (30 g), and the reactor was replaced with nitrogen. Then, tetrafluoroethylene was charged at an initial rate of 600 gZhr, and the temperature was lowered. The reaction was controlled at 125 and a pressure of 0.8 MPa for 6 hours.
  • reaction crude product (HF: 130 Omass. Ppm, tetrafluoropropanol 27% (GC analysis value), t-butanol: 0.16% (GC analysis value))
  • HF 130 Omass. Ppm, tetrafluoropropanol 27% (GC analysis value), t-butanol: 0.16% (GC analysis value)
  • treatment was performed in the following manner. First, the crude reaction product was introduced into the centrifugal separator 2 from the reaction vessel 1, and the unreacted acid acceptor and the reactant of the acid acceptor were removed by centrifugation, and then sent to the first distillation column 3.
  • the separated tetrafluoropropanol is sent to the base treatment tank 5, and 45 g of sodium methylate (28% methanol solution) and 30 g of water are added to tetrafluoropropanol (1 liter). g was added, and the mixture was heated at 110 for 2 hours, and then introduced into the alkaline distillation column 6.
  • distillation was carried out in an alkali distillation column 6 to distill methanol and water from the top of the column, and the bottom component containing tetrafluoropropanol was sent to the alkali distillation column 7. Then, by distillation in an alkali distillation column 7, tetrafluoropropanol having a purity of 99.9% or more was obtained as a middle-stage fraction.
  • the minimum value of the absorbance was 10.4 (abs) in the absorption band of 200 to 220 nm. It was confirmed that the minimum value of absorbance was small and the amount of impurities (evaporation residue) was small.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A process for producing a fluoroalcohol represented by the general formula (1) H(CF2CF2)nCH2OH (1) (wherein n is 1 or 2) from tetrafluoroethylene and methanol as starting materials in the presence of a free-radical generator, characterized by comprising the steps of: (i) reacting tetrafluoroethylene with methanol; and (ii) distilling the resultant crude reaction product either in the presence of a base and water or after bringing it into contact with a base and water to thereby recover the fluoroalcohol represented by the general formula (1). Thus, a fluoroalcohol can be produced which contains substantially no impurities and is suitable for use in producing information recording media (e.g., optical disks such as CD-R and DVD-R), etc.

Description

明 細 書  Specification
フッ素含有アルコール化合物の製法  Method for producing fluorine-containing alcohol compounds
技 術 分 野  Technical field
本発明は、 フッ素含有アルコール化合物の製法に関する。  The present invention relates to a method for producing a fluorine-containing alcohol compound.
背 景 技 術  Background technology
H (CF2CF2) nCHzOH (n=l、 2) の製造法としては、 特開昭 54— 154707号公報、 米国特許 2559628号等において、 tーブチルォクチ ルパ一ォキサイドの存在下に、 過剰のメタノールとテトラフルォロエチレンを反 応させることにより、 H (CF2CF2) nCH2OH (nは最高 12) のテロマ一 混合物が得られることが記載されている。 As a method for producing H (CF2CF2) nCHzOH (n = l, 2), JP-A No. 54-154707, U.S. Pat. No. 2559628, etc. disclose an excess of methanol and It is described that by reacting ethylene, a telomer mixture of H (CF 2 CF 2 ) n CH 2 OH (n is up to 12) can be obtained.
しかしながら、 この方法により得られたテロマ一混合物は、 蒸留により精製し ても数百 p pm程度の蒸発残分の除去ができないため、 例えば CD_Rや DVD —R等の基板上にレーザ一による情報の書き込み及び Z又は読みとり可能な記録 層が設けられてなる情報記録媒体製造時の溶剤として使用する場合、 蒸発残分の 影響により高品質の情報記録媒体の製造には適さないという欠点がある。  However, the telomer mixture obtained by this method cannot remove evaporation residues of several hundred ppm even by purification by distillation. When used as a solvent in the production of an information recording medium provided with a writable and Z- or readable recording layer, there is a drawback that it is not suitable for producing a high-quality information recording medium due to the influence of evaporation residue.
また、 上記テロマー混合物を、 塩基の存在下又は塩基と接触させた後、 蒸留す る方法によって、 不純物の含有量が少ない含フッ素アルコールが られることが 知られている (特許第 3029618号公報) 。 しかしながら、 情報記録媒体製 造時の溶媒として用いる場合には、 より不純物量の少ない含フッ素アルコールが 望まれている。  Further, it is known that a fluorinated alcohol having a low impurity content can be obtained by a method of distilling the telomer mixture in the presence of a base or after bringing the telomer mixture into contact with the base (Japanese Patent No. 3029618). However, when used as a solvent in the production of an information recording medium, a fluorinated alcohol having a lower impurity content is desired.
発 明 の ·開 示  Disclosure of the invention
本発明の主な目的は、 基板上にレーザーによる情報の書き込み及び/又は読み とり可能な記録層が設けられてなる情報記録媒体 (CD— R、 DVD— R等の光 ディスクなど) 等の製造に好適な、 不純物を実質的に含まない含フッ素アルコ一 ルの製造方法を提供することである。  A main object of the present invention is to manufacture information recording media (optical discs such as CD-R and DVD-R) having a recording layer on which information can be written and / or read by a laser on a substrate. It is an object of the present invention to provide a method for producing a fluorine-containing alcohol which is substantially free from impurities.
本発明者は、 上記した如き課題に鑑みて鋭意研究を重ねた結果、 テトラフルォ 口エチレンとメタノールとを反応させて得られた反応粗製物を、 塩基と水の存在 下又は塩基と水に接触させた後、 蒸留することによって、 該反応粗製物を塩基の 存在下又は塩基と接触させて蒸留する場合と比べて、 不純物量をより減少させる ことができ、 不純物を実質的に含まない含フッ素アルコールを得ることが可能と なることを見出し、 ここに本発明を完成するに至った。 The present inventor has conducted intensive studies in view of the above-described problems, and as a result, obtained a reaction crude product obtained by reacting tetrafluoroethylene with methanol in the presence of a base and water or in contact with a base and water. After that, the amount of impurities is further reduced as compared with the case where the crude reaction product is distilled in the presence of or in contact with a base. And found that it was possible to obtain a fluorinated alcohol substantially free of impurities, and completed the present invention.
即ち、 本発明は、 下記の含フッ素アルコールの製造方法を提供するものである That is, the present invention provides the following method for producing a fluorinated alcohol.
1. ラジカル発生源の存在下に、 テトラフルォロエチレンとメタノールを出発 原料として、 下記式 (1) 1. Using tetrafluoroethylene and methanol as starting materials in the presence of a radical source, the following formula (1)
H (CF2CF2) nCH2OH (1) H (CF 2 CF 2 ) nCH 2 OH (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する方法 において、 下記 (i) 及び (ii) 工程を含むことを特徴とする方法:  (Wherein n is 1 or 2), wherein the method comprises the following steps (i) and (ii):
( i) テトラ'フルォロエチレンとメタノールとを反応させる工程、  (i) reacting tetra'fluoroethylene with methanol,
(ii) 得られた反応粗製物を塩基及び水の存在下に蒸留するか、 又は該反応粗製 物を塩基及び水と接触させた後蒸留して、 式 (1) の含フッ素アルコールを回収 する工程。  (ii) Distilling the obtained reaction crude product in the presence of a base and water, or contacting the reaction crude product with a base and water followed by distillation to recover the fluorinated alcohol of the formula (1) Process.
2. ラジカル発生源の存在下に、 テトラフルォロエチレンとメタノールを出発 原料として、 下記式 (1)  2. In the presence of a radical generating source, using tetrafluoroethylene and methanol as starting materials, the following formula (1)
H (CF2CF2) nCH2〇H (1) H (CF 2 CF 2 ) nCH 2 〇H (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する方法 において、 下記 ( i ) 〜 (iii) 工程を含むことを特徴とする方法:  (Wherein n is 1 or 2), wherein the method comprises the following steps (i) to (iii):
( i ) テトラフルォロエチレンとメタノールとを反応させる工程、  (i) reacting tetrafluoroethylene with methanol;
(ii) 得られた反応粗製物を蒸留し、 蒸留塔の塔頂より得られたメタノールを反 応器に戻して再利用し、 ボトム成分として得られた式 (1) の含フッ素アルコ一 ルを回収する工程、  (ii) The obtained reaction crude product is distilled, and methanol obtained from the top of the distillation column is returned to the reactor and reused, and the fluorine-containing alcohol of the formula (1) obtained as the bottom component is obtained. Collecting the
(iii) 得られた含フッ素アルコ一ルを塩基及び水の存在下に蒸留するか、 又は 該含フッ素アルコールを塩基及び水と接触させた後蒸留して、 式 (1) の含フッ 素アルコールを回収する工程。  (iii) distilling the obtained fluorinated alcohol in the presence of a base and water, or contacting the fluorinated alcohol with a base and water followed by distillation to obtain a fluorinated alcohol of the formula (1) Recovering.
3. ラジカル発生源及び受酸剤の存在下に、 テトラフルォロエチレンとメタノ ールを出発原料として、 下記式 (1) 3. Starting from tetrafluoroethylene and methanol in the presence of a radical generator and an acid acceptor, the following formula (1)
H (CF2CF2) nCH2〇H (1) H (CF2CF2) nCH 2 〇H (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する方法 において、 下記 (i ) 〜 (iv) 工程を含むことを特徴とする方法: ( i ) テトラフルォロエチレンとメタノールとを反応させる工程、 (Wherein n is 1 or 2), wherein the method comprises the following steps (i) to (iv): (i) reacting tetrafluoroethylene with methanol;
(ii) 得られた反応粗製物から受酸剤の反応生成物及び未反応の受酸剤を除去す る工程、  (ii) removing the reaction product of the acid acceptor and the unreacted acid acceptor from the obtained reaction crude product,
(iii) 得られた反応粗製物を蒸留し、 蒸留塔の塔頂より得られたメタノールを 反応器に戻して再利用し、 ボトム成分として得られた式 (1) の含フッ素アルコ ールを回収する工程、  (iii) Distill the obtained reaction crude product, return the methanol obtained from the top of the distillation column to the reactor and reuse it, and obtain the fluorine-containing alcohol of the formula (1) obtained as the bottom component. The process of collecting,
(iv) 得られた含フッ素アルコールを塩基及び水の存在下に蒸留する力、、 又は該 含フッ素アルコールを塩基及び水と接触させた後蒸留して、 式 (1) の含フッ素 アルコールを回収する工程。  (iv) the ability to distill the obtained fluorinated alcohol in the presence of a base and water, or the contact of the fluorinated alcohol with a base and water followed by distillation to recover the fluorinated alcohol of formula (1) Process.
4. ラジカル発生源及び受酸剤の存在下に、 テトラフルォロエチレンとメタノ ールを出発原料として、  4. Starting from tetrafluoroethylene and methanol in the presence of a radical generator and an acid acceptor,
式: HCF2CF2CH2〇H Formula: HCF 2 CF 2 CH 2 〇H
で表される含フッ素アルコールを製造する方法において、 下記 (i ) 〜 (V) ェ 程を含むことを特徴とする方法: A method for producing a fluorinated alcohol represented by the following formula, characterized by comprising the following steps (i) to (V):
( i ) テトラフルォロエチレンとメタノールとを反応させる工程、  (i) reacting tetrafluoroethylene with methanol;
(ii) 得られた反応粗製物から受酸剤の反応生成物及び未反応の受酸剤を除去す る工程、  (ii) removing the reaction product of the acid acceptor and the unreacted acid acceptor from the obtained reaction crude product,
(iii) 得られた反応粗製物を蒸留し、 蒸留塔の塔頂より得られたメタノールを 反応器に戻して再利用し、 ボトム成分として得られた式 (1) (iii) The obtained reaction crude product is distilled, methanol obtained from the top of the distillation column is returned to the reactor and reused, and the formula (1) obtained as the bottom component is obtained.
Figure imgf000005_0001
Figure imgf000005_0001
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを回収する工程、 (Where n is 1 or 2) a step of recovering the fluorinated alcohol represented by
(iv) 得られた含フッ素ァルコールを蒸留して11〇 22じ112〇11を分離す る工程、 (iv) Ji 11_Rei 2 Ji 2 fluorinated Arukoru distilled obtained 11 2 Rei_11 steps you separated,
(v) 分離された HCF2CF2CH2OHを塩基及び水の存在下に蒸留するか、 又は該含フッ素アルコールを塩基及び水と接触させた後蒸留して、 HCF2CF(v) Distilling the separated HCF 2 CF 2 CH 2 OH in the presence of a base and water, or contacting the fluorinated alcohol with a base and water followed by distillation to obtain HCF 2 CF
2CH2OHを回収する工程。 Step of recovering 2 CH 2 OH.
5. 上記項 4の方法において、 (V) 工程における HCF2CF2CH2OHを 回収する方法が、 HCF2CF2CH2OHを含む成分を蒸留して低沸点成分を除 去した後、 ボトム成分として得られた HCF2CF2CH2OHを含む成分を再度 蒸留して HCF2CF2CH2OHを回収する方法である含フッ素アルコールの製 造方法。 本発明方法では、 まず、 ラジカル発生源の存在下に、 テトラフルォロエチレン とメタノールとを反応させて下記式 (1) 5. In the method of the above item 4, the method of recovering HCF 2 CF 2 CH 2 OH in the step (V) is as follows: after distilling components containing HCF 2 CF 2 CH 2 OH to remove low boiling components, The component containing HCF 2 CF 2 CH 2 OH obtained as the bottom component was A method for producing a fluorinated alcohol, which is a method of recovering HCF 2 CF 2 CH 2 OH by distillation. In the method of the present invention, first, tetrafluoroethylene and methanol are reacted in the presence of a radical generation source to obtain the following formula (1)
H (CF2CF2) nCH2OH (1) H (CF 2 CF 2 ) nCH 2 OH (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する。 ラジカル発生源としては、 反応開始剤、 UVおよび熱からなる群から選ばれる 少なくとも 1種を使用できる。 ラジカル発生源が UVであるとき、 例えば、 中圧 又は高圧水銀灯からの UVを使用できるる。 ラジカル発生源が熱であるとき、 2 50〜 300 の温度で加熱すればよい。 反応開始剤としては、 過酸化物が例示 でき、 反応温度における半減期が約 10時間となる反応開始剤を好ましく例示で さる。  (Wherein, n is 1 or 2). As the radical generating source, at least one selected from the group consisting of a reaction initiator, UV and heat can be used. When the radical source is UV, for example, UV from a medium or high pressure mercury lamp can be used. When the radical generating source is heat, heating may be performed at a temperature of 250 to 300. As the reaction initiator, a peroxide can be exemplified, and a reaction initiator having a half-life at the reaction temperature of about 10 hours is preferably exemplified.
好ましい反応開始剤としては、 パーブチル D (ジー t一ブチルパーォキサイ ド) 、 パーブチル〇 (t一プチルパ一ォキシ一 2—ェチルへキサノエート) 、 パ 一ブチル I ( t—プチルパーォキシイソプロピルカーボネート) 等を例示できる。 反応開始剤の使用量は、 テトラフルォロエチレン 1モルあたり、 通常 0. 005 〜0. 1モル程度である。  Preferred reaction initiators are perbutyl D (di-tert-butyl peroxyside), perbutyl II (t-butyl peroxy-12-ethylhexanoate), and perbutyl I (t-butyl peroxyisopropyl carbonate). Etc. can be exemplified. The amount of the reaction initiator used is usually about 0.005 to 0.1 mol per 1 mol of tetrafluoroethylene.
上記反応では、 メタノールは、 テトラフルォロエチレンに対して過剰量使用す る。 反応温度は 40-1401:程度、 反応時間は 3〜 12時間程度、 反応圧力は、 0. 2〜1. 2MPa程度とすればよい。 反応は、 例えば高圧反応釜で行うこと ができる。 反応系内は窒素、 アルゴン等の不活性ガスで置換するのが好ましい。 含フッ素アルコールの製造反応は、 受酸剤の存在下に行うのが好ましい。 受酸 剤としては、 炭酸カルシウム、 炭酸マグネシウム、 炭酸ナトリウム、 炭酸力リウ ム、 炭酸水素ナトリウム、 炭酸水素カリウム等のアルカリ金属又はアルカリ土類 金属の炭酸塩及び炭酸水素塩、 酸化カルシウム、 水酸化カルシウム、 ソーダライ ム、 炭酸バリウムなどが挙げられる。 受酸剤は、 反応系を強アルカリ性にするこ となく、 反応時に発生する HFなどの酸をトラップできるものが好ましい。  In the above reaction, methanol is used in an excess amount based on tetrafluoroethylene. The reaction temperature may be about 40 to 1401: about, the reaction time may be about 3 to 12 hours, and the reaction pressure may be about 0.2 to 1.2 MPa. The reaction can be performed, for example, in a high-pressure reactor. It is preferable to replace the inside of the reaction system with an inert gas such as nitrogen or argon. The production reaction of the fluorinated alcohol is preferably performed in the presence of an acid acceptor. Examples of the acid acceptor include carbonates and bicarbonates of alkali metals or alkaline earth metals such as calcium carbonate, magnesium carbonate, sodium carbonate, lithium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, calcium oxide, and calcium hydroxide. , Soda lime, barium carbonate and the like. The acid acceptor is preferably one that can trap an acid such as HF generated during the reaction without making the reaction system strongly alkaline.
受酸剤の使用量は、 特に限定されないが、 テトラフルォロエチレン 1モル当た り、 0 . 0 0 1〜0 . 1モル程度とすればよい。 The amount of the acid acceptor used is not particularly limited, but 1 mole of tetrafluoroethylene The amount may be about 0.001 to 0.1 mol.
本発明の含フッ素アルコールの製造方法では、 上記した方法によって、 式 ( 1 ) で表される含フッ素アルコールを製造した後、 得られた反応粗製物を、 塩 基及び水の存在下、 又は塩基及び水に接触させた後、 蒸留することによって、 蒸 発残分を実質的に含まない含フッ素アルコールとすることができる。  In the method for producing a fluorinated alcohol of the present invention, after the fluorinated alcohol represented by the formula (1) is produced by the above-described method, the obtained reaction crude product is treated in the presence of a base and water, or a base. And after contacting with water, distillation is carried out to obtain a fluorinated alcohol containing substantially no evaporation residue.
塩基としては、 p K bが 2以下の塩基が好適である。 この様な塩基としては、 例えばナトリウムメチラート、 ナトリウムェチラ一ト、 ナトリウムプロピラート、 カリウム tーブトキシド、 リチウムェチラ一トなどのアルカリ金属アルコラート、 水酸化ナトリウム、 水酸化カリウム、 水酸化リチウムなどのアルカリ金属水酸化 物、 水酸化カルシウム、 水酸化アルミニウム、 水酸化バリウム、 水酸化マグネシ ゥム、 ソーダライム等を例示できる。 これらの内で、 特に、 アルカリ金属アルコ ラートが好ましい。  As the base, a base having a pKb of 2 or less is preferable. Such bases include, for example, alkali metal alcoholates such as sodium methylate, sodium ethylate, sodium propylate, potassium t-butoxide, lithium ethylate, and alkali metals such as sodium hydroxide, potassium hydroxide, and lithium hydroxide. Examples include hydroxide, calcium hydroxide, aluminum hydroxide, barium hydroxide, magnesium hydroxide, and soda lime. Of these, alkali metal alcoholates are particularly preferred.
塩基の使用量は、 含フッ素アルコール 1 0 0重量部に対して、 0 . 1〜1 0重 量部程度とすることが好ましく、 1〜 3重量部程度とすることがより好ましい。 また、 水の使用量は、 含フッ素アルコ一ル 1 0 0重量部に対して、 0 . 1〜1 0重量部程度とすることが好ましく、 1〜 3重量部程度とすることがより好まし い。  The amount of the base to be used is preferably about 0.1 to 10 parts by weight, more preferably about 1 to 3 parts by weight, based on 100 parts by weight of the fluorinated alcohol. The amount of water used is preferably about 0.1 to 10 parts by weight, more preferably about 1 to 3 parts by weight, based on 100 parts by weight of the fluorinated alcohol. No.
反応粗製物を塩基及び水の存在下に蒸留する場合には、 塩基及び水を蒸留塔の 塔中段又はスチルに添加すればよい。 また、 該反応粗製物を塩基及び水と接触さ せた後、 蒸留する場合には、 蒸留塔の前に、 処置槽 (塩基処理槽) を設置すれば よい。 この場合、 該塩基処理槽における操作条件については特に限定的ではない が、 通常、 塩基を添加した後、 2 0〜: L 5 0 °C程度で 0 . 5〜 3時間程度反応さ せればよい。  When the crude reaction product is distilled in the presence of a base and water, the base and water may be added to the middle stage of the distillation column or to the still. When the crude reaction product is brought into contact with a base and water and then distilled, a treatment tank (base treatment tank) may be provided in front of the distillation column. In this case, the operating conditions in the base treatment tank are not particularly limited, but usually, after the addition of the base, the reaction may be performed at about 20 to about 50 ° C. for about 0.5 to 3 hours. .
この様にして、 塩基及び水の存在下、 又は塩基及び水と接触させた後、 蒸留し て含フッ素アルコールを分離回収することによって、 蒸発残分を実質的に含まな レ 上記式 (1 ) で表される含フッ素アルコールを得ることができる。  In this way, by separating and recovering the fluorinated alcohol by distillation in the presence of a base and water or after contact with the base and water, the above-mentioned formula (1) Can be obtained.
また、 この蒸留処理は、 反応粗製物を蒸留して過剰のメタノールを除去した後 に行っても良い。 メタノールを除去するための蒸留操作では、 蒸留塔の塔頂より メタノールが留出し、 含フッ素アルコールはボトム液に含まれるので、 塔頂から 得られたメタノールは、 反応器に戻して再利用することによって有効に利用でき る。 This distillation treatment may be performed after the reaction crude product is distilled to remove excess methanol. In the distillation operation for removing methanol, methanol is distilled off from the top of the distillation column, and fluorine-containing alcohol is contained in the bottom liquid. The obtained methanol can be used effectively by returning it to the reactor and reusing it.
尚、 本発明方法では、 テトラフルォロエチレンとメタノールとの反応後、 反応 粗製物から、 C a F 2、 N a F等の受酸剤の反応生成物及び未反応の受酸剤を除 去することが好ましい。 この操作については特に限定的ではなく、 固形分である 受酸剤の反応生成物及び未反応の受酸剤を反応粗製物から除去できる方法であれ ばよく、 例えば、 遠心分離機を用いることによって効率よく除去できる。 In the method of the present invention, after the reaction of tetrafluoroethylene with methanol, the reaction product of the acid acceptor such as CaF 2 and NaF and the unreacted acid acceptor are removed from the crude reaction product. Preferably. The operation is not particularly limited, and any method may be used as long as the reaction product of the acid acceptor and the unreacted acid acceptor, which are solid components, can be removed from the crude reaction product.For example, by using a centrifuge, It can be removed efficiently.
また、 式 (1 ) において n = 1の含フッ素アルコールであるテトラフルォロプ ロパノールを最終製品として得る場合には、 反応粗製物から、 必要に応じて蒸留 等の方法で過剰のメタノールを除去し、 更に、 蒸留等の方法によって、 式 (1 ) における n = 1のテトラフルォロプロパノールと、 nが 2以上の含フッ素アルコ ールとに分離した後、 分離回収されたテトラフルォロプロパノールについて、 上 記した条件に従って、 塩基及び水の存在下、 又は塩基及び水と接触させた後、 蒸 留してテトラフルォロプロパノールを回収すればよい。  In addition, when tetrafluoropropanol, which is a fluorine-containing alcohol with n = 1 in the formula (1), is obtained as a final product, if necessary, excess methanol is removed from the crude reaction product by a method such as distillation. After separation into tetrafluoropropanol of n = 1 in formula (1) and a fluorinated alcohol having n of 2 or more by a method such as distillation, the tetrafluoropropanol separated and recovered is as follows. According to the conditions described above, tetrafluoropropanol may be recovered by distillation in the presence of a base and water, or after contact with a base and water.
この場合、 式 (1 ) における n = 1のテトラフルォロプロパノールと、 nが 2 以上の含フッ素アルコールとに分離するための蒸留操作では、 蒸留塔の塔頂より テトラフルォロプロパノールが留出し、 n≥ 2の含フッ素アルコールは、 ボトム 成分に含まれるので、 塔頂より得られたテトラフルォロプロパノ一ルについて、 前述した方法に従って蒸留操作を行えばよい。  In this case, in the distillation operation for separating tetrafluoropropanol where n = 1 in Formula (1) and a fluorinated alcohol where n is 2 or more, tetrafluoropropanol is distilled from the top of the distillation column. Since the fluorinated alcohol having n≥2 is contained in the bottom component, the distillation operation may be performed on the tetrafluoropropanol obtained from the top according to the method described above.
テトラフルォロプロパノールを、 塩基及び水の存在下、 又は塩基及び水と接触 させた後、 蒸留することによって、 実質的に不純物を含まないテトラフルォロプ ロパノールを得ることができる。  Tetrafluoropropanol substantially free of impurities can be obtained by distilling tetrafluoropropanol in the presence of a base and water, or after bringing it into contact with a base and water, followed by distillation.
塩基及び水で処理する際には、 使用した塩基の種類に応じてアルコールや水等 が反応生成物として生じ、 該反応生成物、 水、 塩基の溶媒として用いたアルコー ル等の低沸点成分がテトラフルォロプロパノールに混入する。 従って、 高純度の テトラフルォロプロパノールを得るためには、 まず、 第一段階の蒸留操作として、 低沸点成分であるアルコ一ル、 水等をテトラフルォロアルコールから分離除去す るための蒸留を行ない、 次いで、 第二段階として、 第一段階の蒸留操作によって ボトム成分として得られたテトラフルォロアルコールを含む成分を蒸留してテト ラフルォロアルコールを回収することが好ましい。 この様な蒸留方法によれば、 アルコールや水の混入が無く、 実質的に不純物を含まないテトラフルォロプロパ ノールを得ることができる。 When treating with a base and water, alcohol and water are produced as reaction products depending on the type of base used, and the reaction products, water, and low-boiling components such as alcohol used as a solvent for the base are removed. Mix in tetrafluoropropanol. Therefore, in order to obtain high-purity tetrafluoropropanol, first, as a first-stage distillation operation, alcohol, water, etc., which are low-boiling components, are separated and removed from tetrafluoro alcohol. Distillation is carried out, and then, as a second step, a component containing tetrafluoroalcohol obtained as a bottom component by the distillation operation of the first step is distilled to obtain a solution. It is preferred to recover the lafluoro alcohol. According to such a distillation method, it is possible to obtain tetrafluoropropanol which is substantially free from impurities and contains no alcohol or water.
また、 この様な二段階の蒸留操作に代えて、 アルコール、 水等の低沸点成分 を順次蒸留除去した後、 テトラフルォロアルコールを蒸留塔の塔頂部又は中段部 より回収することも可能であるが、 上記した二段階の蒸留方法のほうが簡単に高 純度のテトラフルォロプロパノールを回収できる。  Instead of such a two-stage distillation operation, it is also possible to sequentially remove low-boiling components such as alcohol and water by distillation, and then recover tetrafluoroalcohol from the top or middle stage of the distillation column. However, the two-stage distillation method described above can easily recover high-purity tetrafluoropropanol.
尚、 「実質的に不純物を含まない」 とは、 フッ素アルコールの蒸発残分が 50 p pm以下、 好ましくは 25 p pm以下、 より好ましくは 10 p pm以下である ことを意味し、 また、 この蒸発残分の含有量の指標となるメタノール中での吸光 度 (205 nm) が 0. 1 a b s以下、 好ましくは— 0. l ab s以下、 より好 ましくは— 0. 2 ab s以下、 更に好ましくは一 0. 4 ab s以下であることを 意味する。  Here, "substantially free of impurities" means that the evaporation residue of the fluoroalcohol is 50 ppm or less, preferably 25 ppm or less, more preferably 10 ppm or less. The absorbance in methanol (205 nm), which is an indicator of the content of evaporation residue, is 0.1 abs or less, preferably -0.1 abs or less, more preferably -0.2 abs or less. More preferably, it is less than 0.4 abs.
ここで、 蒸発残分は、 含フッ素アルコールを 40 :、 5mmHg (0. 665 kP a) で濃縮したときの残分の重量を測定し、 HCF2CF2CH2OHに対す ma s s, p pmで表わす。 Here, the evaporation residue is obtained by measuring the weight of the residue obtained when the fluorinated alcohol is concentrated at 40 :, 5 mmHg (0.665 kPa), and the ss, p pm relative to HCF 2 CF 2 CH 2 OH is measured. Expressed by
また、 メタノール中の吸光度は、 一般式 (1) の含フッ素アルコール lm 1に メタノール 3m 1を加えたものを測定試料とし、 リファレンスとしてメタノール を用いて測定される。  The absorbance in methanol is measured using a sample obtained by adding 3 ml of methanol to lm 1 of the fluorinated alcohol of the general formula (1), and using methanol as a reference.
本発明方法で得られる実質的に不純物を含まないテトラフルォロプロパノール は、 例えば、 基板上にレーザ一による情報の書き込み及び Z又は読みとり可能な 記録層が設けられてなる情報記録媒体を製造する際の溶剤として好適である。 基板上にレーザ一による情報の書き込み及び Z又は読みとり可能な記録層が設 けられてなる情報記録媒体は、 本発明方法で得られたテトラフルォロプロパノ一 ルを含む溶剤、 好ましくはテトラフルォロプロパノールを含むフッ素系溶剤に色 素を溶解し、 得られた溶液を用いて、 常法に従って基板上に塗布、 乾燥するなど の方法で色素を含む記録層を形成することによって製造できる。 該色素としては、 シァニン系色素、 フタロシアニン系色素、 ピリリウム系色素、 チォピリリウム系 色素、 スクヮリリウム系色素、 ァズレニウム系色素、 インドフエノール系色素、 インドア二リン系色素、 トリフエニルメタン系色素、 キノン系色素、 アルミニゥ ム系色素、 ジインモニゥム系色素、 金属錯塩系色素等が挙げられる。 基板として は、 ポリカーボネート、 ポリメチルメタクリレート、 エポキシ樹脂、 ァモルファ スポリオレフイン、 ポリエステル、 ポリ塩化ビニルなどのプラスチック、 ガラス、 セラミックス等が挙げられる。 尚、 記録層と基板の間に平面性の改善、 接着力の 向上、 記録層の変質防止等の目的で下塗層を設けてもよく、 記録層の上には保護 層を設けてもよい。 The tetrafluoropropanol substantially free from impurities obtained by the method of the present invention can be used, for example, to produce an information recording medium in which a substrate is provided with a recording layer on which information can be written and Z or readable by a laser. It is suitable as a solvent at that time. An information recording medium in which a recording layer capable of writing and Z or reading information by a laser is provided on a substrate is a solvent containing tetrafluoropropanol obtained by the method of the present invention, preferably tetrafluoropropanol. It can be produced by dissolving a dye in a fluorinated solvent containing olopropanol and using the resulting solution to form a recording layer containing a dye by a method such as coating and drying on a substrate according to a conventional method. Examples of the dye include cyanine dyes, phthalocyanine dyes, pyrylium dyes, thiopyrylium dyes, squarylium dyes, azurenium dyes, indophenol dyes, Indoor dyes, triphenylmethane dyes, quinone dyes, aluminum dyes, diimmonium dyes, metal complex dyes, and the like. Examples of the substrate include plastics such as polycarbonate, polymethyl methacrylate, epoxy resin, amorphous polyolefin, polyester, and polyvinyl chloride, glass, and ceramics. An undercoat layer may be provided between the recording layer and the substrate for the purpose of improving flatness, improving adhesive strength, preventing deterioration of the recording layer, and a protective layer may be provided on the recording layer. .
本発明方法によれば、 塩基の存在下に蒸留する場合と比べて、 より一層蒸発残 分が少ない、 実質的に不純物を含まない式 (1) の含フッ素アルコールを得るこ とができる。  According to the method of the present invention, it is possible to obtain a fluorinated alcohol of the formula (1) substantially free of impurities and having a smaller evaporation residue as compared with the case of distillation in the presence of a base.
本発明の方法によって分離回収されたテトラフルォロプロパノールは、 実質的 に不純物を含まないものであり、 基板上にレーザーによる情報の書き込み及び/ 又は読みとり可能な記録層が設けられてなる情報記録媒体 (CD— R、 DVD— R等の光ディスクなど) 、 フィルムの感光体等の製造に好適な溶剤となる。 図面の簡単な説明  The tetrafluoropropanol separated and recovered by the method of the present invention does not substantially contain impurities, and has an information recording structure in which a recording layer on which information can be written and / or read by a laser is provided on a substrate. It is a suitable solvent for producing media (such as optical discs such as CD-R and DVD-R) and film photoreceptors. BRIEF DESCRIPTION OF THE FIGURES
図 1は実施例 1における連続蒸留工程を示すフロー図である。 図中、 1は反応 釜、 2は遠心分離機、 3は第一蒸留塔、 4は第二蒸留塔、 5は塩基処理槽、 6は アルカリ蒸留塔、 7はアルカリ蒸留塔を示す。  FIG. 1 is a flowchart showing a continuous distillation step in Example 1. In the figure, 1 is a reaction vessel, 2 is a centrifuge, 3 is a first distillation column, 4 is a second distillation column, 5 is a base treatment tank, 6 is an alkali distillation column, and 7 is an alkali distillation column.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
以下、 実施例を挙げて本発明を更に詳細に説明する。  Hereinafter, the present invention will be described in more detail with reference to Examples.
実施例 1 Example 1
高圧反応釜にメタノール (2リットル) 、 パーブチル D (45 g) および炭酸 カルシウム (30 g) を仕込み、 該反応釜を窒素置換した後テトラフルォロェチ レンを初期速度 600 gZh rで仕込み、 温度 125 、 圧力 0. 8 MP aに制 御し、 6時間反応させた。  A high-pressure reactor was charged with methanol (2 liters), perbutyl D (45 g) and calcium carbonate (30 g), and the reactor was replaced with nitrogen. Then, tetrafluoroethylene was charged at an initial rate of 600 gZhr, and the temperature was lowered. The reaction was controlled at 125 and a pressure of 0.8 MPa for 6 hours.
得られた反応粗製物 (HF : 130 Oma s s . p pm、 テトラフルォロプロ パノール 27% (GC分析値) 、 tーブ夕ノール: 0. 16% (GC分析値) ) について、 図 1のフロー図に示す連続蒸留工程により、 以下の方法で処理した。 まず、 反応粗製物を反応釜 1から遠心分離機 2に導入し、 遠心分離法によって 未反応の受酸剤及び受酸剤の反応物を除去した後、 第 1蒸留塔 3に送つた。 The obtained reaction crude product (HF: 130 Omass. Ppm, tetrafluoropropanol 27% (GC analysis value), t-butanol: 0.16% (GC analysis value)) In the continuous distillation process shown in the flow chart, treatment was performed in the following manner. First, the crude reaction product was introduced into the centrifugal separator 2 from the reaction vessel 1, and the unreacted acid acceptor and the reactant of the acid acceptor were removed by centrifugation, and then sent to the first distillation column 3.
次いで、 第一蒸留塔 3において、 メタノ一ルを留出させて、 反応釜 1にリサイ クルした。 含フッ素アルコールを含むボトム成分については、 第二蒸留塔 4に送 り、 テトラフルォロプロパノール (n = l ) を含む留分と、 式 (1 ) において n ≥ 2以上の含フッ素アルコールを含むボトム成分とに分離した。  Next, in the first distillation column 3, methanol was distilled off and recycled to the reactor 1. The bottom component containing a fluorinated alcohol is sent to the second distillation column 4 and contains a fraction containing tetrafluoropropanol (n = l) and a fluorinated alcohol with n ≥ 2 or more in the formula (1) Separated from the bottom component.
次いで、 分離されたテトラフルォロプロパノールを塩基処理槽 5に送り、 テト ラフルォロプロパノール (1リットル) に対して、 ナトリウムメチラ一ト (2 8 %メタノール溶液) 4 5 gと水 3 0 gを添加して、 1 1 0 で 2時間加熱処理し た後、 アルカリ蒸留塔 6に導入した。  Next, the separated tetrafluoropropanol is sent to the base treatment tank 5, and 45 g of sodium methylate (28% methanol solution) and 30 g of water are added to tetrafluoropropanol (1 liter). g was added, and the mixture was heated at 110 for 2 hours, and then introduced into the alkaline distillation column 6.
次いで、 アルカリ蒸留塔 6で蒸留して、 メタノール及び水を塔頂から留出させ、 テトラフルォロプロパノールを含むボトム成分をアルカリ蒸留塔 7に送った。 次いで、 アルカリ蒸留塔 7で蒸留することによって、 中段部の留分として純度 9 9 . 9 %以上のテトラフルォロプロパノールを得た。  Then, distillation was carried out in an alkali distillation column 6 to distill methanol and water from the top of the column, and the bottom component containing tetrafluoropropanol was sent to the alkali distillation column 7. Then, by distillation in an alkali distillation column 7, tetrafluoropropanol having a purity of 99.9% or more was obtained as a middle-stage fraction.
比較実験例 1 Comparative example 1
実施例 1と同様の方法で得たテトラフルォロプロパノール 2 2 0 0 gに、 ナト リウムメチラート 6 6 g ( 2 8 %メタノール溶液) を添加し、 蒸留を行った。 得られたフッ素アルコール留分について吸光度分析を行ったところ、 2 0 0〜 2 2 0 n mの吸収帯で、 吸光度の最小値は一 0 . 2 ( a b s ) であった。  To 220 g of tetrafluoropropanol obtained in the same manner as in Example 1, 66 g of sodium methylate (28% methanol solution) was added, followed by distillation. Absorbance analysis of the obtained fluoroalcohol fraction showed that the minimum value of absorbance was 10.2 (abs) in the absorption band of 200 to 220 nm.
実験例 1 Experimental example 1
実施例 1で得たテトラフルォロプロパノ一ル 3 0 0 0 gに、 ナトリウムメチラ ート 9 0 g ( 2 8 %メタノール溶液) と水 6 2 gを添加し、 蒸留を行った。  To 300 g of tetrafluoropropanol obtained in Example 1, 90 g of sodium methylate (28% methanol solution) and 62 g of water were added, followed by distillation.
得られたフッ素アルコール留分について吸光度分析を行ったところ、 2 0 0〜 2 2 0 n mの吸収帯で、 吸光度の最小値が一 0 . 4 ( a b s ) であり、 比較実験 例 1と比べると吸光度の最小値が小さく、 不純物量 (蒸発残分) が少ないことが 確認できた。  When the absorbance analysis was performed on the obtained fluoroalcohol fraction, the minimum value of the absorbance was 10.4 (abs) in the absorption band of 200 to 220 nm. It was confirmed that the minimum value of absorbance was small and the amount of impurities (evaporation residue) was small.

Claims

請 求 の 範 囲 The scope of the claims
1. ラジカル発生源の存在下に、 テトラフルォロエチレンとメタノールを出発 原料として、 下記式 (1) 1. Using tetrafluoroethylene and methanol as starting materials in the presence of a radical source, the following formula (1)
Figure imgf000012_0001
Figure imgf000012_0001
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する方法 において、 下記 (i) 及び (ii) 工程を含むことを特徴とする方法:  (Wherein n is 1 or 2), wherein the method comprises the following steps (i) and (ii):
- (i) テトラフルォロエチレンとメタノールとを反応させる工程、 -(i) reacting tetrafluoroethylene with methanol,
(ii) 得られた反応粗製物を塩基及び水の存在下に蒸留するか、 又は該反応粗製 物を塩基及び水と接触させた後蒸留して、 式 (1) の含フッ素アルコールを回収 する工程。  (ii) Distilling the obtained reaction crude product in the presence of a base and water, or contacting the reaction crude product with a base and water followed by distillation to recover the fluorinated alcohol of the formula (1) Process.
2. ラジカル発生源の存在下に、 テトラフルォロエチレンとメタノールを出発 原料として、 下記式 (1) 2. In the presence of a radical generating source, using tetrafluoroethylene and methanol as starting materials, the following formula (1)
H (CF2CF2) nCH2〇H (1) H (CF2CF2) nCH 2 〇H (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する方法 において、 下記 (i) 〜 (iii) 工程を含むことを特徴とする方法:  (Wherein n is 1 or 2), wherein the method comprises the following steps (i) to (iii):
(i) テトラフルォロエチレンとメタノールとを反応させる工程、  (i) reacting tetrafluoroethylene with methanol,
(ii) 得られた反応粗製物を蒸留し、 蒸留塔の塔頂より得られたメタノールを反 応器に戻して再利用し、 ボトム成分として得られた式 (1) の含フッ素アルコー ルを回収する工程、  (ii) The obtained reaction crude product is distilled, and methanol obtained from the top of the distillation column is returned to the reactor and reused, and the fluorine-containing alcohol of the formula (1) obtained as the bottom component is obtained. The process of collecting,
(iii) 得られた含フッ素アルコールを塩基及び水の存在下に蒸留するか、 又は 該含フッ素アルコールを塩基及び水と接触させた後蒸留して、 式 (1) の含フッ 素アルコールを回収する工程。  (iii) The obtained fluorinated alcohol is distilled in the presence of a base and water, or the fluorinated alcohol is contacted with a base and water and then distilled to recover the fluorinated alcohol of the formula (1). Process.
3. ラジカル発生源及び受酸剤の存在下に、 テトラフルォロエチレンとメタノ ールを出発原料として、 下記式 (1) 3. Starting from tetrafluoroethylene and methanol in the presence of a radical generator and an acid acceptor, the following formula (1)
H (CF2CF2) nCH2〇H (1) H (CF 2 CF 2 ) nCH 2 〇H (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを製造する方法 において、 下記 (i) 〜 (iv) 工程を含むことを特徴とする方法: ( i ) テトラフルォロエチレンとメタノールとを反応させる工程、 (Wherein n is 1 or 2) A method for producing a fluorinated alcohol represented by the formula: wherein the method comprises the following steps (i) to (iv): (i) reacting tetrafluoroethylene with methanol;
(ii) 得られた反応粗製物から受酸剤の反応生成物及び未反応の受酸剤を除去す る工程、  (ii) removing the reaction product of the acid acceptor and the unreacted acid acceptor from the obtained reaction crude product,
(iii) 得られた反応粗製物を蒸留し、 蒸留塔の塔頂より得られたメタノールを 反応器に戻して再利用し、 ボトム成分として得られた式 (1) の含フッ素アルコ ールを回収する工程、  (iii) Distill the obtained reaction crude product, return the methanol obtained from the top of the distillation column to the reactor and reuse it, and obtain the fluorine-containing alcohol of the formula (1) obtained as the bottom component. The process of collecting,
(iv) 得られた含フッ素アルコールを塩基及び水の存在下に蒸留するか、 又は該 含フッ素アルコールを塩基及び水と接触させた後蒸留して、 式 (1) の含フッ素 アルコールを回収する工程。  (iv) Distilling the obtained fluorinated alcohol in the presence of a base and water, or contacting the fluorinated alcohol with a base and water followed by distillation to recover the fluorinated alcohol of the formula (1) Process.
4. ラジカル発生源及び受酸剤の存在下に、 テトラフルォロエチレンとメタノ —ルを出発原料として、 4. Starting from tetrafluoroethylene and methanol in the presence of a radical source and an acid acceptor,
式: HCF2CF2CH2OH Formula: HCF 2 CF 2 CH 2 OH
で表される含フッ素アルコールを製造する方法において、 下記 (i ) 〜 (V) ェ 程を含むことを特徴とする方法: A method for producing a fluorinated alcohol represented by the following formula, characterized by comprising the following steps (i) to (V):
( i ) テトラフルォロエチレンとメタノールとを反応させる工程、  (i) reacting tetrafluoroethylene with methanol;
(ii) 得られた反応粗製物から受酸剤の反応生成物及び未反応の受酸剤を除去す る工程、  (ii) removing the reaction product of the acid acceptor and the unreacted acid acceptor from the obtained reaction crude product,
(iii) 得られた反応粗製物を蒸留し、 蒸留塔の塔頂より得られたメタノールを 反応器に戻して再利用し、 ボトム成分として得られた式 (1)  (iii) The obtained reaction crude product is distilled, methanol obtained from the top of the distillation column is returned to the reactor and reused, and the formula (1) obtained as the bottom component is obtained.
H (CF2CF2) nCH2〇H (1) H (CF2CF2) nCH 2 〇H (1)
(式中、 nは、 1又は 2である) で表される含フッ素アルコールを回収する工程、 (Where n is 1 or 2) a step of recovering the fluorinated alcohol represented by
(iv) 得られた含フッ素ァルコールを蒸留してHCF2CF2CH2〇Hを分離す る工程、 (iv) a step of distilling the obtained fluorinated alcohol to separate HCF 2 CF 2 CH 2 〇H,
(v) 分離された HCF2CF2CH2OHを塩基及び水の存在下に蒸留するか、 又は該含フッ素アルコールを塩基及び水と接触させた後蒸留して、 H C F 2 C F 2CH2OHを回収する工程。 (v) Distilling the separated HCF 2 CF 2 CH 2 OH in the presence of a base and water, or contacting the fluorinated alcohol with a base and water followed by distillation to obtain HCF 2 CF 2 CH 2 OH Recovering.
5. 請求項 4の方法において、 (V) 工程における HCF2CF2CH2OHを 回収する方法が、 H C F 2 C F 2 C H 2 OHを含む成分を蒸留して低沸点成分を除 去した後、 ボトム成分として得られたHCF2CF2CH2〇Hを含む成分を再度 蒸留してHCF2CF2CH2OHを回収する方法でぁる含フッ素ァルコ一ルの製 造方法。 5. The method according to claim 4, wherein the HCF 2 CF 2 CH 2 OH in the step (V) is The method of recovery is to distill components containing HCF 2 CF 2 CH 2 OH to remove low boiling components, and then distill components containing HCF 2 CF 2 CH 2 〇H obtained as bottom components again. HCF 2 CF 2 A method for producing fluorinated alcohol by recovering CH 2 OH.
PCT/JP2001/006073 2000-08-28 2001-07-13 Process for producing fluoroalcohol compound WO2002018307A1 (en)

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JPH035434A (en) * 1989-05-13 1991-01-11 Hoechst Ag Production of telomer alcohol
EP0967193A2 (en) * 1998-12-28 1999-12-29 Daikin Industries, Limited Process for production of fluoroalcohol and its use for the manufacture of an information recording medium
EP0968990A2 (en) * 1999-03-15 2000-01-05 Daikin Industries, Limited Method for manufacturing fluoroalcohol

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JPH035434A (en) * 1989-05-13 1991-01-11 Hoechst Ag Production of telomer alcohol
EP0967193A2 (en) * 1998-12-28 1999-12-29 Daikin Industries, Limited Process for production of fluoroalcohol and its use for the manufacture of an information recording medium
EP0968990A2 (en) * 1999-03-15 2000-01-05 Daikin Industries, Limited Method for manufacturing fluoroalcohol

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