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Dodecafluoroheptanol: Tetrafluoroethylene Joined to Methanol (Joyce 1951)
Charlie

Nilikha ni

Charlie

28. Oktubre 2026DE
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Dodecafluoroheptanol: Tetrafluoroethylene Joined to Methanol (Joyce 1951)

Heated with methanol and a little peroxide, tetrafluoroethylene adds on to the methanol in short chains: H(CF2CF2)nCH2OH, with n from 1 to 12. Steam carries off the short ones; distilling the liquid part sorts them by boiling point. The cut at 169–170 °C, three units long, is the start of a fluorine soap used to make PTFE dispersions. Source: R. M. Joyce (du Pont), US 2,559,628 (1951), Example IV. The steam-distillation and fractionating apparatus is ours. Picture drawn by Youblob.
Abantado
2 days

Mga Tagubilin

1

Charge the reactor

Put 150 parts of methanol and 2 parts of tert-butyl octyl peroxide in a high-pressure reactor. Close it, cool it, and let in 110 parts of tetrafluoroethylene through a valve. Parts are by weight.

Mga materyales para sa hakbang na ito:

MethanolMethanol150 parts
TetrafluoroetilenaTetrafluoroetilena110 parts

Mga kailangang kasangkapan:

tert-Butyl octyl peroxidetert-Butyl octyl peroxide
Reactor na may presyonReactor na may presyon
Tangke ng gas na may presyonTangke ng gas na may presyon
Timbangang panimbangTimbangang panimbang
2

Heat at 170 °C for 10 hours

Agitate and heat at 170 °C for 10 hours. The pressure rises on its own to about 90 atmospheres.

Mga kailangang kasangkapan:

Reactor na may presyonReactor na may presyon
Panukat ng DiinPanukat ng Diin
TermometroTermometro
3

Steam-distil the product

Steam-distil the product. What comes over is part liquid and part solid; separate the two. Ours: steam from a boiler through the flask, a condenser, and a separatory funnel for the liquid.

Mga kailangang kasangkapan:

Boiler ng singawBoiler ng singaw
Prasko ng Salamin sa DistilasyonPrasko ng Salamin sa Distilasyon
Ikid ng kondensadorIkid ng kondensador
Embudong panghiwalayEmbudong panghiwalay
4

Fractionate; keep the 169–170 °C cut

Fractionally distil the liquid part. It separates into the series H(CF2CF2)nCH2OH; collect the fraction boiling at 169–170 °C, where n = 3 (dodecafluoroheptanol). The patent gives no yield for this cut.

Mga kailangang kasangkapan:

Alambike ng paghati-hatiAlambike ng paghati-hati
TermometroTermometro
Garapong Salamin na May TakipGarapong Salamin na May Takip

Mga Materyales

2

Mga Kinakailangang Kasangkapan

12

Ang blueprint na ito ay gumagawa ng

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Dodecafluoroheptanol

Free

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Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo

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