Potassium Hydroxide → isobutyltrimethoxysilane KOH

HRID 1852306

Reaktionsgleichung

Reaktionsgleichung von HRID 1852306
[CH2:1]([Si:5]([O:10][CH3:11])([O:8][CH3:9])[O:6][CH3:7])[CH:2]([CH3:4])[CH3:3].[OH-:12].[K+:13]>O>[CH2:1]([Si:5]([O:10][CH3:11])([O:6][CH3:7])[O:8][CH3:9])[CH:2]([CH3:4])[CH3:3].[OH-:12].[K+:13]

Komponenten

4

Edukt 2

HCID 14797Potassium HydroxideHCID 87622Isobutyltrimethoxysilane2×

Produkt 1

HCID 131732459isobutyltrimethoxysilane KOH

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel4×

Versuchsvorschrift

A 1000 ml 5-neck round-bottom flask rendered inert with nitrogen and equipped with paddle stirrer, dropping funnel, thermometer, and water separator with reflux condenser is charged—in an oil bath at 40° C.—with 117 g (0.636 mol) of isobutyltrimethoxysilane (=2-methyl-1-propyltrimethoxysilane, available commercially from abcr GmbH & Co. KG) and 155.6 g of Isopar E (isoparaffinic hydrocarbon mixture with a boiling range of 113-143° C., available commercially from ExxonMobil). The water separator is filled to the brim with Isopar E. While stirring at 350 rpm, a solution of 42 g (0.636 mol) of potassium hydroxide (85% strength, available commercially from AppliChem) in 32.1 g of demineralized water is metered in over 10 minutes. During this addition, the reaction mixture warms up to 48° C. By subsequent heating it is bought to boiling temperature. The distillate separates out as the lower phase in the water separator. Up to a boiling temperature of 118° C., 73.5 g of clear colorless distillate are collected, which according to analysis by gas chromatography contains 87.1% methanol, 8% water, and 3.6% Isopar E. The hydrolysis of the methoxy radicals, accordingly, is quantitative. During the distillation, a pasty white solid separates out in the reaction mixture. The volatile constituents are removed by distillation at 70° C./4 hPa. The residue left is 94 g of a white, fine powder whose solids content is 99% (determined using the HR73 Halogen Moisture Analyzer solids content balance from Mettler Toledo at 160° C.)

Aufarbeitung

  1. customA 1000 ml 5-neck round-bottom flask rendered inert with nitrogen
  2. customequipped with paddle stirrer
  3. temperaturewith reflux condenser
  4. customis charged—in an oil bath at 40° C.
  5. customis metered in over 10 minutes
  6. additionDuring this addition
  7. customwarms up to 48° C
  8. temperatureBy subsequent heating it
  9. distillationUp to a boiling temperature of 118° C., 73.5 g of clear colorless distillate are collected
  10. customThe hydrolysis of the methoxy radicals
  11. distillationDuring the distillation
  12. customThe volatile constituents are removed by distillation at 70° C./4 hPa
  13. waitThe residue left
  14. customat 160° C.

Quellen und Nachweise

ORD-Eintrag
ord-f345fc13f31f42ecb4655bb4d0565a06
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08961672B2

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