C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/186
C01B 33/26 (2006.01) C01B 39/02 (2006.01)
Patent
CA 1121977
A B S T R A C T A process for the continuous production of an aqueous, alkaline suspension of x-ray amorphous sodium alum- inosilicate having a small particle size of at least 99% by volume of a particle size of less than 50 µ, suitable for con- version into zeolite sodium aluminosilicate of the smallest particle sizes, by mixing an aqueous sodium aluminate solution with an aqueous sodium silicate solution in the presence of excess sodium hydroxide solution at a temperature in the range of from 20° to 103°C, where the solutions being mixed have a mathematical total molar ratio of: 1.5 to 9 Na2O : 1 A12O3 : 1 to 7 SiO2 : 4Q to 400 H2O consisting essentially of the steps of continuously passing one of said two aqueous solutions into the entrance of an elongated substantially circular cross-sectional reaction zone having a ratio of length to diameter of more than 500, contin- uously splitting the other aqueous solution into at least three partial streams, continuously passing the first of said partial streams into said entrance, continuously passing the mixed contents through said elongated reaction zone divided into a first zone where the mean holding time is from 5 to 60 seconds into a second zone of said elongated reaction zone, continuously passing the remainder of said partial streams separately into downstream zones of said elongated reaction zone, where said mean holding time of the reaction mixture in each of said separate zones of said elongated reaction zone is at least 5 seconds and suficient to effect substantial mix- ing of said contents, the mean holding time in the entirety of said elongated substantially circular cross-section reaction zone being at least 3 minutes. - A -
347662
Christophliemk Peter
Wust Willi
Deutsche Gold Und- Silber-Scheideanstalt Vormals Roessler
Henkel Kommanditgesellschaft Auf Aktien
Macrae & Co.
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