Continuous process for the production of amorphouse sodium alumi

Details Continuous process for the production of amorphouse sodium alumi Continuous process for the production of amorphouse sodium alumi

1980-03-05

1981-05-12

Meros, Edward J.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

106288B, 423328, C01B 3326, C01B 3328

Patent

active

042671582

ABSTRACT:
A process for the continuous production of an aqueous, alkaline suspension of x-ray amorphous sodium aluminosilicate having a small particle size of at least 99% by volume of a particle size of less than 50.mu., suitable for conversion into zeolite sodium aluminosilicate of the smallest particle sizes, by mixing an aqueous sodium aluminate solution with an aqueous sodium slicate solution in the presence of excess sodium hydroxide solution at a temperature in the range of from 20.degree. to 103.degree. C., where the solutions being mixed have a mathematical total molar ratio of:
1.5 to 9 Na.sub.2 O:1 Al.sub.2 O.sub.3 :1 to 7 SiO.sub.2 :40 to 400 H.sub.2 O consisting essentially of the steps of continuously passing one of said two aqueous solutions into the first zone of a progressively, separately zoned mixing area, continuously splitting the other aqueous solution into at least three partial streams, continuously passing the first of said partial streams into said first zone, continuously passing the mixed contents of said first zone into the second zone of a progressively, separately zoned mixing area, continuously passing the remainder of said partial streams separately into downstream zones of said progressively, separately zoned mixing area, where said mean holding time of the reaction mixture in each of said separately zoned mixing areas is at least 5 seconds and sufficient to effect substantial mixing of said contents.

REFERENCES:
patent: 2882243 (1959-04-01), Milton
patent: 2904607 (1959-09-01), Mattox et al.
patent: 4041135 (1977-09-01), Williams et al.
patent: 4071377 (1979-01-01), Schwuger et al.
patent: 4073867 (1978-02-01), Roebke et al.
patent: 4213874 (1980-07-01), Williams et al.

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