The present disclosure generally relates to ionic compositions which may be used in or as an adhesive material for selectively adhering two items together. More particularly, but not exclusively, the present disclosure relates to ionic compositions that include a cationic imidazolium compound and an anionic compound such as a sulfonyl imide compound.
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Page/Page column 16; 17
(2018/09/21)
HETEROGENEOUS CATALYSTS IN THE ALKYLATION OF IMIDAZOLES
The reaction of imidazoles with alcohols at 300-400 deg C was studied in the presence of heterogeneous γ-Al2O3 catalysts and Y zeolites.The major reaction was found to be N-alkylation.This reaction is accompanied by C-alkylation on γ-Al2O3, while the selectivity relative to N-alkylation is close to 100percent on zeolite catalysts.The greatest activity with 100percent selectivity was found for H zeolite.The alkylation of methanol and ethanol by 2-methylimidazole at 310-320 deg C gave 1,2-dimethylimidazole in ca. 100percent yield and 1-ethyl-2-methylimidazole in 90percent yield respectively.The reaction of methanol and imidazole gave 1-methylimidazole in 99percentyield.This catalyst displays high stability and capacity for oxidative regeneration.
Gitis, K. M.,Neumoeva, G. E.,Isagulyants, G. V.
p. 547 - 550
(2007/10/02)
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