Tetrahydrofuran → CID 3084433

HRID 1589292

Reaktionsgleichung

Reaktionsgleichung von HRID 1589292
[CH2:1]1[CH2:5][O:4][CH2:3][CH2:2]1>O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.P.[W].[W].[W].[W].[W].[W].[W].[W].[W].[W].[W].[W].O>[CH3:1][CH2:5][CH2:1][CH2:5][O:4][C@H:3]([CH2:2][OH:4])[CH2:3][CH3:2]

Komponenten

4

Edukt 1

HCID 8028Tetrahydrofuran2×

Produkt 1

HCID 3084433CID 3084433

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 45231312-Wolframophosphoric acidKatalysatorHCID 962WaterLösungsmittel3×

Versuchsvorschrift

Polymerization was carried out by means of the continuous polymerization device as shown in FIGURE. First, into a polymerization tank 1 of 350 ml volume equipped with a stirrer and a reflux condenser, 135 g of phosphotungstic acid with a coordinated water molecules number of 3.3 (H3PW12O40.3.3H2O) was charged and 270 g of THF with a water content of 200 ppm was added, followed by stirring. The polymerization tank was set at a temperature of 60° C. and THF containing water of 0.4 wt. % was fed at a rate of 60 g/hour. The polymerization tank mixture was circulated between the tank and the phase separation tank 2, and the upper layer separated was withdrawn at a rate of 60 g/hour. From the upper layer, THF was removed by distillation, resulting to provide PTMG. After continuous running for 260 hours, 2.0 Kg of a PTMG with a number-average molecular weight of 1750 was obtained.

Aufarbeitung

  1. customPolymerization
  2. customFirst, into a polymerization tank 1 of 350 ml volume equipped with a stirrer and a reflux condenser
  3. customthe phase separation tank 2
  4. customthe upper layer separated
  5. customwas withdrawn at a rate of 60 g/hour
  6. customFrom the upper layer, THF was removed by distillation
  7. customresulting

Quellen und Nachweise

ORD-Eintrag
ord-7b39fb76d99f4216a1c7ec010fe6c087
Quelldatensatz
uspto-grants-1986_02
Patentnummer
US04568775

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