Process for the complete replacement of particles in vessels

Details Process for the complete replacement of particles in vessels Process for the complete replacement of particles in vessels

1984-03-28

1985-03-05

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

208213, 208251H, 208171, C10G 4500

Patent

active

045029466

ABSTRACT:
Process for the complete replacement under operating conditions of particles in a vessel provided with a feed inlet and, if desired, a separate particle inlet, a particle outlet and an effluent outlet, wherein part of the feed passing through the vessel during withdrawal of particles is by-passing the vessel when the particles still present in the vessel do not occupy more than 20% v of the volume initially occupied by particles and the feed is passed through the vessel before or during the addition of fresh particles.
The process is particularly suitable for the complete replacement under operating conditions of spent hydrodemetallization catalysts.

REFERENCES:
patent: 3207689 (1965-09-01), Van Driesen
patent: 3410791 (1968-11-01), Perry et al.
patent: 4059502 (1977-11-01), James
patent: 4338187 (1982-07-01), Gartside et al.

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