Method for improving the filterability of aluminum salts precipi

Details Method for improving the filterability of aluminum salts precipi Method for improving the filterability of aluminum salts precipi

1976-07-12

1977-02-22

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 53, 423122, 423418, C02C 502

Patent

active

040091031

ABSTRACT:
The filterability of aluminum salts precipitated from an aqueous solution containing dissolved aluminum ion is improved by adjusting the pH of the solution to between about 4 and 6, adding less than a stoichiometric amount of a 1, 3-dicarbonyl compound such as acetylacetone to the solution to precipitate the aluminum dicarbonyl and then adding a sufficient amount of an alkaline hydroxide to precipitate the remaining dissolved aluminum ion in the form of aluminum hydroxide to obtain a mixed precipitate which can be readily filtered.

REFERENCES:
patent: 2952517 (1960-09-01), Podall et al.
patent: 3798160 (1974-03-01), Huffman
patent: 3880612 (1975-04-01), Ostergren et al.
patent: 3893916 (1975-07-01), Argabright et al.
patent: 3956121 (1976-05-01), Haschke et al.

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