Continuous process for manufacturing crystalline zeolites

Details Continuous process for manufacturing crystalline zeolites Continuous process for manufacturing crystalline zeolites

C - Chemistry, Metallurgy

01

B

252/15

C01B 39/02 (2006.01)

Patent

CA 1231083

A CONTINUOUS PROCESS FOR MANUFACTURING CRYSTALLINE ZEOLITES Abstract A continuous process is described for manufacturing a wide variety of zeolites having selected crystal sizes and other desired characteristics. Selected raw materials are fed to a precursor tank 11 of relatively large capacity, wherein the resultant zeolite precursor slurry is held at temperatures of up to 180°F (82°C) for4-16 hours, with high shear agitation, as an induction period. The slurry is sent to a plurality of crystallization tanks 14, 18 before it possesses a total solids content exceeding 10% by weight and a crystalline content exceeding 15% by weight of the total solids content. The crystallization tanks are operated in two stages, the first crystallizing stage 14 being held at a temperature of 180-250°F (82-121°C) for 2-72 hours, and the second crystallizing stage 18 being held at a temperature greater than 250°F (121°C) for 2-16 hours.

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