Process to make allyl chloride and reactor useful in that process

A reactor vessel for producing a gaseous reaction product from gaseous reagents comprising:

• a housing with walls having an interior and exterior surface, said walls forming a chamber, said chamber comprising an approximately spherical continuously stirred tank reactor (CSTR) zone for reacting at least about 50 percent to about 90 percent of gaseous reagents injected therein forming an effluent stream of reacted gaseous reagents and unreacted gaseous reagents of from at least about 10 percent to about 50 percent, said spherical CSTR being integral with a plug-flow tubular reactor (PFTR) zone for reacting the at least about 10 percent to about 50 percent of the unreacted gaseous reagents in the effluent stream from the CSTR zone passing through the PFTR zone;
• said reaction of unreacted gaseous reagents in the PFTR zone being measured by a temperature rise in the PFTR zone;
• said CSTR zone having a predetermined volume, said PFTR zone having a predetermined volume;
• wherein the ratio of the volume of the CSTR zone alone to the total volume of the CSTR zone and the PFTR zone together is about 0.1:1 to about 0.9:1;
• one or more inlets disposed on the CSTR zone for injecting gaseous reagents into the CSTR zone to form a reaction mixture and the effluent stream therein;
• means for passing the effluent gaseous stream from the CSTR zone to the PFTR zone;
• and one or more outlets disposed on the PFTR zone for withdrawing a gaseous product of reacted gaseous reagents from the PFTR zone.