Process for handling catalyst from an oxygenate to olefin reaction
AssigneeExxonMobile Chemical Patents Inc.
InventorsJames Harding Beech JR., Michael Peter Nicoletti, David Ritchie Lumgair JR.
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Abstract
The present invention is a process for removing catalyst fines from an effluent stream in an oxygenate to olefin process. Specifically, the catalyst fines in the effluent stream are separated from the effluent stream. Then the carbonaceous deposits are removed from the catalyst fines by incineration.
Claims83
A process for separating and disposing of catalyst in an oxygenate to olefins reaction system, the process comprising the steps of:
- (a) converting oxygenates to olefins in a reactor in the presence of a catalyst having carbonaceous deposits;
- (b) withdrawing from the reactor an effluent stream comprising the olefins, the effluent stream being entrained with a portion of the catalyst having carbonaceous deposits;
- (c) separating the portion of the catalyst from the effluent stream by contacting the effluent stream with a liquid quench medium to produce a catalyst containing stream;
- and
- (d) incinerating in an incinerator the carbonaceous deposits that are on the portion of the catalyst in the catalyst containing stream.
A process of separating and disposing of catalyst fines in an oxygenate to olefins reaction system, the process comprising the steps of:
- (a) converting oxygenates to olefins in a reactor in the presence of catalyst particles;
- (b) separating the catalyst particles from the effluent stream comprising olefin product and water, the effluent stream being entrained with catalyst fines having carbonaceous deposits;
- (c) separating the catalyst fines from the olefin product by contacting the catalyst fines with a quench medium to produce a dilute fines stream;
- (d) concentrating the dilute fines stream to produce a concentrated fines stream;
- and
- (e) removing in an incinerator at least a portion of the carbonaceous deposits from the catalyst fines from the concentrated fines stream.
A process for converting a feedstock comprising an oxygenate into one or more olefin(s), the process comprising the steps of:
- (a) contacting the feedstock with a molecular sieve catalyst to form one or more olefin(s) and catalyst fines comprising carbonaceous deposits;
- (b) withdrawing from the reactor an effluent stream, comprising water and one or more olefin(s), the effluent stream being entrained with the catalyst fines;
- (c) contacting the effluent stream with a liquid quench medium to produce a first stream and a second stream, the first stream comprising substantially all the one or more olefin(s), and the second stream comprising a majority of the catalyst fines;
- and
- (d) removing the carbonaceous deposit from the catalyst fines.
A process for removing impurities from water generated by or introduced into an oxygenate to olefins reactor system, the process comprising the steps of:
- (a) separating an effluent stream comprising olefin(s), catalyst fines and water into a first stream comprising a majority of the olefin(s) and a second stream comprising a majority of the catalyst fines and the water;
- (b) separating the second stream into a third stream comprising a majority of the catalyst fines and a fourth stream comprising a majority of the water.
A process for removing catalyst fines comprising a carbonaceous deposit, wherein the catalyst fines are formed by contacting an oxygenate with a molecular sieve catalyst in a reactor system comprising a reactor and a regenerator, and withdrawing from the reactor an effluent stream comprising water and catalyst fines, the process comprising the steps of:
- (a) separating the water and the catalyst fines from the olefin product, (b) transporting at least a portion of the water and catalyst fines to a regenerator, and (c) removing the carbonaceous deposit from the catalyst fines in the regenerator.
Dependencies are inferred from the claim text.