Silica-based substrates modified by grafting of polyalkylguanidi

Details Silica-based substrates modified by grafting of polyalkylguanidi Silica-based substrates modified by grafting of polyalkylguanidi

1992-11-30

1994-09-20

Pal, Asok

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Including organic component

502 60, 502 64, 502233, B01J 2108

Patent

active

053489233

ABSTRACT:
Silica-based substrate surface-modified by grafting covalent links of organic polysubstituted guanidinium groups, and preferably polyakylguanidinium groups. These substrates can be obtained by reacting silica with a polyalkylguanidinium anion, the silanol residual groups of silica being optionally treated with hexamethyldisilazane to stabilize the substrates. These substrates can be used as chlorination and esterification catalysts.

REFERENCES:
patent: 3597248 (1971-08-01), Yates
patent: 4613491 (1986-09-01), Jung et al.
patent: 5026533 (1991-06-01), Matthes et al.

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