Process for injecting particulate material into a fluidized bed

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal

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423DIG16, C22B 3400, C22B 100

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active

059684607

ABSTRACT:
The present invention is a process for feeding particulate material to a fluidized bed reactor operated at greater than atmospheric through a standpipe wherein the ratio of the absolute pressure where the standpipe enters the fluidized bed reactor to the absolute pressure where the particulate material enters the standpipe is at least about 1.5 and gas is injected into the standpipe at a velocity which is about 20-80 percent of the minimum fluidization velocity of the particulate material.

REFERENCES:
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patent: 4738828 (1988-04-01), Brooks
patent: 4860694 (1989-08-01), Walker
patent: 5175943 (1993-01-01), Eastham et al.
patent: 5320815 (1994-06-01), Abed et al.
patent: 5325603 (1994-07-01), Eastham et al.
R.A.Sauer, I.H. Chan, T. M. Knowlton, "The Effects of System and Geometrical Parameters on the Flow of Class-B Solids in Overflow Standpipes", American Institute of Chemical Engineers Symposium Series, vol. 80, No. 234, (1983), no month.
D. Geldart, Types of Gas Fluidization, Powder Technology, 7, 285-292, 1973, no month.

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