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Process for producing a fluorinated alcohol

A technology for fluorinated alcohols and methanol, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of hydroxyl compounds, etc. It can solve the problems of low refining yield of fluorinated alcohols, low yield of fluorinated alcohols, heavy loads, etc.

Inactive Publication Date: 2003-10-15
ASAHI GLASS CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In the telomerization mixture of method (1), usually containing the decomposition product of dialkyl peroxide-alcohol, there will be the following problem: when this alcohol is present, the refining yield of fluorinated alcohol will be very low
Furthermore, in the method (2), the alcohol as a decomposition product remains in the bottom liquid together with the fluorinated alcohol, and there is a problem in the subsequent process that the load on the distillation process for producing a high-purity fluorinated alcohol becomes heavy. Heavy, and the yield of fluorinated alcohol will be very low

Method used

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  • Process for producing a fluorinated alcohol
  • Process for producing a fluorinated alcohol
  • Process for producing a fluorinated alcohol

Examples

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Embodiment

[0050] Hereinafter, the present invention will be explained in further detail with reference to examples. Hereinafter, the amount of water can be obtained by the Karl Fischer method; the amount of HF can be obtained by the fluoride ion electrode analysis method; the amount of organic compounds such as methanol, tert-butanol, and fluorinated alcohol can be analyzed by gas chromatography, and the Area % to calculate the respective proportions.

[0051] Example

[0052] Add methanol (3 cubic meters) and Perbutyl D (20 kilograms) alkyl peroxide to the autoclave with internal volume of 5 cubic meters, and flush the reaction kettle with nitrogen, then heat up to 125 ° C, and continuously add four Vinyl fluoride, making the internal pressure 0.8 MPa and reacting for 16 hours.

[0053] The reaction crude liquid after the reaction contained 100 ppm of unreacted Perbutyl D, 8000 ppm of t-butanol, 1500 ppm of HF, 3000 ppm of water and methanol as other components. Water was added to t...

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Abstract

A process for producing a high-purity fluorinated alcohol in a satisfactory purification yield. The process comprises reacting methanol with tetrafluoroethylene or hexafluoropropylene in the presence of an alkyl peroxide to produce a fluorinated alcohol, wherein the liquid reaction mixture obtained after completion of the reaction is distilled in the presence of both water and HF to separate the mixture into a fraction containing an alcohol derived from the peroxide and a bottom containing the fluorinated alcohol and the bottom is purified to recover the fluorinated alcohol.

Description

technical field [0001] The present invention relates to a process for the preparation of fluorinated alcohols. The fluorinated alcohol of the present invention can be used as a solvent for preparing on a substrate such as a film photoreceptor or an information recording medium (such as a CD-R or DVD-R, etc.) with a recording layer capable of writing and / or reading information by a laser. Optical disc) recording layer process. Background technique [0002] As the preparation of general formula H(CF 2 CF 2 ) m CH 2 OH (wherein, m is 1 or 2) shown in the method of fluorination alcohol, (1) known in the presence of dialkyl peroxide such as tert-butyl octyl peroxide as free radical initiator, will Excess methanol and tetrafluoroethylene react to produce H(CF 2 CF 2 ) k CH 2 A method of OH telomerized mixture (wherein k is an integer between 1 and 12) (JP-A-54-154707 and US Patent No. 2,559,628). [0003] In addition, (2) as a method for refining the telomer mixture, a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/44C07C29/80C07C31/38
CPCC07C29/80C07C29/44C07C31/38
Inventor 岡本秀一
Owner ASAHI GLASS CO LTD
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