Phosgene → bisphenol A 4,4'-dihydroxydiphenyl ether

HRID 30946

Reaktionsgleichung

Reaktionsgleichung von HRID 30946
[CH:1]1[C:6]([OH:7])=[CH:5][CH:4]=[C:3]([O:8][C:9]2[CH:14]=[CH:13][C:12]([OH:15])=[CH:11][CH:10]=2)[CH:2]=1.[OH:16][C:17]1[CH:22]=[CH:21][C:20]([C:23]([C:26]2[CH:31]=[CH:30][C:29]([OH:32])=[CH:28][CH:27]=2)([CH3:25])[CH3:24])=[CH:19][CH:18]=1.[OH-].[Na+].C(C1C=CC(O)=CC=1)(C)(C)C.C(Cl)(Cl)=O.C(N1CCCCC1)C>O.C(Cl)Cl>[OH:16][C:17]1[CH:18]=[CH:19][C:20]([C:23]([C:26]2[CH:27]=[CH:28][C:29]([OH:32])=[CH:30][CH:31]=2)([CH3:25])[CH3:24])=[CH:21][CH:22]=1.[CH:13]1[C:12]([OH:15])=[CH:11][CH:10]=[C:9]([O:8][C:3]2[CH:4]=[CH:5][C:6]([OH:7])=[CH:1][CH:2]=2)[CH:14]=1

Komponenten

9

Edukt 6

HCID 6371PhosgeneHCID 6623Bisphenol AHCID 73934-tert-ButylphenolHCID 13007N-EthylpiperidineHCID 14798Sodium Hydroxide2×HCID 160694,4'-Dihydroxydiphenyl ether

Produkt 1

HCID 131727054bisphenol A 4,4'-dihydroxydiphenyl ether

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

131 ml of methylene chloride are added to a solution, rendered inert with nitrogen, of 0.809 g (0.004 mol.) of 4,4′-dihydroxydiphenyl ether and 17.35 g (0.076 mol.) of bisphenol A as well as 7.04 g (0.176 mol.) of sodium hydroxide in 131 ml of water. In a one-step procedure, 0.36 g (0.0024 mol. or 3.0 mol. % relative to bisphenol) of p-tert.-butylphenol (BUP) are added as chain terminator. At a pH value of 14 and at room temperature, 11 ml (15.8 g, 0.16 mol.) of phosgene are added in the course of 10 minutes. In order to prevent the pH value from falling below 12, 25% sodium hydroxide solution was added during the phosgenation. When the phosgenation is complete, and after rinsing with nitrogen, 0.11 ml (0.0008 mol., 1 mol. % relative to bisphenol) of n-ethylpiperidine is added as catalyst, and stirring is then carried out for one hour. The aqueous phase is separated off, and the organic phase is acidified with phosphoric acid and washed with distilled water until neutral and free of salt. Precipitation of the polymer in methanol and drying yield 19.0 g of polycarbonate.

Aufarbeitung

  1. additionwas added during the phosgenation
  2. additionis added as catalyst
  3. customThe aqueous phase is separated off
  4. washwashed with distilled water until neutral and free of salt
  5. customPrecipitation of the polymer in methanol
  6. dry with materialdrying yield 19.0 g of polycarbonate

Quellen und Nachweise

ORD-Eintrag
ord-06cc8b0fb59844cf9ab3dd002d2ac791
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07425358B2

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