Pyrogenic silica, process for the production thereof and use

Details Pyrogenic silica, process for the production thereof and use Pyrogenic silica, process for the production thereof and use

1996-07-30

1999-11-02

Marcantoni, Paul

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C01B 3312

Patent

active

059764805

ABSTRACT:
Pyrogenically produced silica having a specific surface of less than 90 m.sup.2 /g, preferably of less than 60 m.sup.2 /g, and a DBP absorption of less than 60 wt. % (less or equal to 57.30 ml dibutyl phthalate/100 g) is produced by vaporizing silicon halides and/or organosilicon halides, mixing the vapors with a carrier gas, heating the mixture to temperatures definitely above the boiling point of the silicon-halogen compound, mixing with hydrogen and combustion in a known manner in a burner.

REFERENCES:
patent: 4108964 (1978-08-01), Kratel et al.
patent: 4994534 (1991-02-01), Rhee et al.
patent: 5166227 (1992-11-01), Raimes et al.
patent: 5342597 (1994-08-01), Tunison, III
patent: 5389420 (1995-02-01), Sextl et al.

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