Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Combined
Patent
1990-12-20
1992-04-28
Johnston, Jill
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Combined
422190, B01J 804
Patent
active
051087197
ABSTRACT:
Isopentene, or isoamylene, conversion to methyl tert-amyl ether can be substantially improved while high conversion of isobutylene to methyl tert-butyl ether can be maintained by carrying out the overall etherification process with alkanol in a staged manner, wherein the first stage is methanol etherification of a C.sub.5 +, or C.sub.5, hydrocarbon feedstream rich in isoamylene and the second stage is etherification to produce MTBE and additional TAME from a C.sub.4 +, or C.sub.4, feedstream. Unreacted methanol and hydrocarbons from the first etherification are uniquely separated by fractionation from the TAME product by using the second stage C.sub.4 + feedstream as a reflux stream to the fractionator and passed to the second etherification zone. Products from the second etherification zone are separated by distillation to produce MTBE, TAME and C.sub.5 +, or C.sub.5, hydrocarbons as a bottom stream.
REFERENCES:
patent: 4788364 (1988-11-01), Harandi
Harandi Mohsen N.
Owen Hartley
Johnston Jill
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Wise L. G.
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