Abstract An existing riser-reactor into which reactants are injected for reaction therein through a plurality of nozzles is modified to provide the same with additional nozzles and as desired the nozzles are arranged to inject the same or different reactants to portions of the riser-reactor which are separated each from the other so that optimum reaction can take place in each portion. In one form of the apparatus a chamber is constructed around an existing riser-reactor into which at the place surrounded by the chamber there have been inserted and fixed to its wall a plurality of nozzled pipes whereby to feed reactant from the chamber through the pipes and nozzles into the riser-reactor. As desired, the pipes can extend to provide nozzles for injection into the riser-reactor at various depths or levels therein. Also, by partitioning the chamber different reactants can be injected from the overall chamber to different portions of the riserreactors. An apparatus as described can be originally constructed in toto rather than by modifying an existing riser-reactor.
In an alkylation apparatus comprising an acid cooler and a settler, a riser-reactor extending therebetween through which fluid moves from said cooler to said settler and means for conveying fluid from said settler to said cooler, said riser-reactor being suitable for the alkylation of an isoparaffin with an olefin in the presence of an acid moving from said acid cooler through said riser-reactor, reactant injector pipes within said riser-reactor, said pipes communicating with a reactant supply at the base of said riser-reactor, the improvement comprising a chamber surrounding said riser-reactor forming an enclosed space thereabout, a pipe communicating from without the apparatus with the inside of said chamber and at least one opening from said chamber into said riser-reactor for supplying additional fluid from outside the apparatus through said chamber directly into said riser-reactor.
Claim 2
Dependent Claim
134 words
In an alkylation apparatus comprising an acid cooler and a settler, a riser-reactor extending therebetween through which fluid moves from said cooler to said settler and means for conveying fluid from said settler to said cooler, said riser-reactor being suitable for the alkylation of an isoparaffin with an olefin in the presence of an acid moving from said acid cooler through said riser-reactor, reactant injector pipes within said riser-reactor, said pipes communicating with a reactant supply at the base of said riser-reactor, the improvement comprising a chamber surrounding said riser-reactor forming an enclosed space thereabout, a pipe communicating from without the apparatus with the inside of said chamber and at least one opening from said chamber into said riser-reactor for supplying additional fluid from outside the apparatus through said chamber directly into said riser-reactor.
Claim 3
Dependent Claim
27 words
The riser-reactor according to claim 1 wherein a plurality of pipes extend inwardly from the riser-reactor wall into the riser-reactor and are in communication with said chamber.
Claim 4
Dependent Claim
37 words
An apparatus according to claim 2 wherein there is a separator within said riser-reactor to separate the same into a plurality of sections and there extends respectively into each of said sections a pipe from said chamber.