Stabilized concentrated sulphuric acid compositions

Details Stabilized concentrated sulphuric acid compositions Stabilized concentrated sulphuric acid compositions

1989-12-18

1991-12-24

Lewis, Michael

Chemistry of inorganic compounds

With additive

25240021, 25240022, 423522, C01B 1769

Patent

active

050750860

ABSTRACT:
The present invention provides a stabilized concentrated sulphuric acid composition containing a chemical additive selected from a group of aminoalkylphosphonates that increases the precipitation threshold of impurities in solution, thereby suppressing the precipitation of said impurities and the formation of "cloudy acid".

REFERENCES:
patent: 3701825 (1972-10-01), Radimer
patent: 3903244 (1975-09-01), Winkley
patent: 3951840 (1976-04-01), Fujino et al.
patent: 4059678 (1977-11-01), Winkley
patent: 4383104 (1983-05-01), Sasaki et al.
patent: 4414183 (1983-11-01), Sasaki et al.
patent: 4900469 (1990-02-01), Farr et al.
Chemical Abstracts, 91:47254e (1979), Liszewski, L. J. and Battaglia, C. J.

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