Reaktionsgleichung
[C:1]([O:5][C:6]([CH3:9])([CH3:8])[CH3:7])([CH3:4])([CH3:3])C.C=C(C)C.C(O)CCCCC.[C:21]1(O)[C:30]2[C:25](=CC=C[CH:29]=2)[CH:24]=[CH:23][CH:22]=1.C(OCCCCCC)(C)(C)C>>[C:6]([O:5][C:1]1[C:3]2[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=2)[CH:30]=[CH:29][CH:4]=1)([CH3:7])([CH3:8])[CH3:9]Komponenten
Versuchsvorschrift
The influence on the acid-catalyzed formation of t-butyl ether from isobutene with n-hexanol and 1-naphthol was examined in a competitive reaction. The formation of dimers and oligomers of isobutene as side-products was to be suppressed, and selectivity for one of the two alcohols was to be achieved. While the formation of almost 25% of isobutene dimers, based on the ethers formed, occurs in methyl-free Sn-containing Si glass (3% Sn, 97% Si), no dimer formation can be detected in the product with methyl-containing Sn--Si glass (30% Me--Si, 3% Sn, 67% Si). With methyl-free Al-containing Si glass (3% Al, 97% Si), the formation of isobutene dimers predominates, and the yield is around 67% naphthol t-butyl ether and 37% n-hexyl t-butyl ether. With methyl-containing Al-Si glass (10% Me--Si, 3% Al, 87% Si), only 30% isobutene dimers form, relatively to the ether formation, and the yield of ethers increases to 57% n-hexyl t-butyl ether and 43% naphthol t-butyl ether. This suppression of dimer formation and change of the ether selectivity with increasing methyl content of the glasses is continued in Zr-containing glasses.
Aufarbeitung
- customformed
Quellen und Nachweise
- ORD-Eintrag
- ord-275d8bccfe8e4bcfaab816cf763f7d62
- Quelldatensatz
- uspto-grants-2000_09
- Patentnummer
- US06121187
Verknüpfte Notizen
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