Chemistry of inorganic compounds – Carbon or compound thereof – Oxygen containing
Patent
1987-11-23
1990-06-26
Stoll, Robert L.
Chemistry of inorganic compounds
Carbon or compound thereof
Oxygen containing
423419P, 423625, 423630, 423115, 423625, C01B 3124
Patent
active
049370618
ABSTRACT:
Continuous production of aluminum hydroxycarbonate gel by continuous reaction of aluminum salt solution with mixed alkaline carbonate and bicarbonate solution under homogeneous conditions in a relatively small reaction vessel, and continuing the reaction in a subsequent reaction vessel under controlled pH. The product gel is separated from the non-aluminum cation containing reaction mixture within less than about 6 hours, whereby formation of poorly soluble addition reaction products such as dihydroxy aluminium sodium carbonate, which contribute undesired non-aluminum cations to the gel product, is reduced. The aluminum salt solution is adjusted in pH by adding to it a portion of the mixed carbonate and bicarbonate solution to obtain a clear solution of pH 3.5 to 4.0. This results in a smooth, creamy gel with less objectionable chalky mouth feel.
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Ambike Suhas H.
Blaser Eric
Wen Betty P. L.
Wright Arthur P. G.
Gaglia, Jr. Charles A.
Harvey Paige C.
Jeanette Henry C.
Nath Gary M.
Stoll Robert L.
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