초록 ▼

A continuous reactor system useful for treating petroleum oil in a multi-phase fixed bed catalytic reactor comprising a system for: feeding the oil and a reactant gas at production flow rates above a first bed of porous solid catalyst particles under conversion conditions for cocurrent downward flow

A continuous reactor system useful for treating petroleum oil in a multi-phase fixed bed catalytic reactor comprising a system for: feeding the oil and a reactant gas at production flow rates above a first bed of porous solid catalyst particles under conversion conditions for cocurrent downward flow therethrough, collecting and withdrawing the treated oil from the first bed and redistributing at least a portion of the treated oil to at least one succeeding catalyst bed while permitting the gaseous phase to flow directly to the succeeding lower catalyst bed, recycling a quantity of treated oil collected below a catalyst bed and reapplying the treated oil at a preceding redistribution zone above the bed from which treated oil is collected, whereby the total of oil production flow rate and recycled treated oil flow rate is maintained at a predetermined minimum sufficient to effect uniform catalyst wetting. This technique is useful for hydrodewaxing of oils over zeolite catalysts.

대표청구항 ▼

A vertical reactor column for continuous contacting of gas and liquid reactants with a series of porous catalyst beds comprising inlet means at the top of the reactor column for feeding gas and liquid reactants, gas recovery and liquid product recovery outlet means at the bottom of the reactor colum

A vertical reactor column for continuous contacting of gas and liquid reactants with a series of porous catalyst beds comprising inlet means at the top of the reactor column for feeding gas and liquid reactants, gas recovery and liquid product recovery outlet means at the bottom of the reactor column, multiple vertically spaced catalyst beds supported in the column comprising a first catalyst bed and at least one succeeding catalyst bed for continuous contacting gas and liquid reactants with catalyst in concurrent downward flow through the reactor column; interbed redistributor means disposed between the catalyst beds comprising a liquid collection reservoir, gas-liquid downcomer conduit means passing through the liquid collection reservoir, gas-liquid redistribution means disposed below said liquid collection reservoir to convey and uniformly distribute the gaseous reactant and a portion of the liquid reactant in the reservoir directly to the succeeding catalyst bed; withdrawal conduit means for withdrawing a portion of the reactant liquid from the collection reservoir, recycle conduit means for recycling the withdrawn liquid to a gas-liquid redistribution means disposed above the catalyst bed from which the liquid came, said recycle conduit means introducing the recycle liquid to the first catalyst bed at a location above the first catalyst bed and said recycle conduit means introducing the recycle liquid in each said succeeding catalyst bed at a location between the collection reservoir and the gas-liquid redistribution means located above the respective succeeding catalyst bed, said redistribution means being capable of uniformly distributing the recycle liquid on the catalyst bed.