Compositions – Dust suppressants for bulk materials – or processes of...
Patent
1986-06-26
1988-05-31
Wax, Robert
Compositions
Dust suppressants for bulk materials, or processes of...
134 3, 134 41, 252 80, C23G 102
Patent
active
047479752
ABSTRACT:
A method of dissolving either a precipitate or deposit that contains essentially calcium carbonate comprising contacting the precipitate or deposit with a mixture comprising a first acid, the first acid being a Lewis acid in a concentration of 10 to 1000 mmoles/l, and a second acid, the second acid being a medium-strength to weak protonic acid or a partly deprotonated acid that yields at least one proton with the molar ratio of the second acid to the Lewis acid being between 1:1 and 6:1, the Lewis acid being a solution of at least one salt of a strong acid with cations selected from the group consisting of cations of a 3-valence main-group element, cations of a 3-valence transition element, cations of a 3-valence lanthanide, cations of a 3-valence actinide, cations of a 4-valence main-group element, cations of a 4-valence transition element, cations of a 4-valence lanthanide and cations of a 4-valence actinide.
REFERENCES:
patent: 3547817 (1972-12-01), Hansen, Jr. et al.
patent: 3633672 (1972-01-01), Smith et al.
patent: 3639263 (1972-01-01), Troscinski et al.
patent: 3704750 (1972-12-01), Miles et al.
patent: 4264463 (1981-04-01), Katake et al.
U H T Umwelt und Hygienetechnik GmbH
Wax Robert
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