초록 ▼

A simplified process for jointly producing butene-1 and ether in a catalytic distillation column which comprises an upper catalytic zone for etherification and a lower catalytic zone for isomerization of C.sub.4 plus olefins and conversion of butadiene. The process is especially useful when combined

A simplified process for jointly producing butene-1 and ether in a catalytic distillation column which comprises an upper catalytic zone for etherification and a lower catalytic zone for isomerization of C.sub.4 plus olefins and conversion of butadiene. The process is especially useful when combined with a process for the production of light olefins including ethylene and propylene from methanol. According to the invention, the produced butene-1 stream is combined with ethylene to produce polyethylene.

대표청구항 ▼

[ I claim:] [1.] A process for the production of butene-1 from a feedstream comprising butene-1, butene-2, isobutylene, butadiene, and pentenes, comprising the following steps:a) passing the feedstream and an alcohol stream at effective etherification and separation conditions to a catalytic distill

[ I claim:] [1.] A process for the production of butene-1 from a feedstream comprising butene-1, butene-2, isobutylene, butadiene, and pentenes, comprising the following steps:a) passing the feedstream and an alcohol stream at effective etherification and separation conditions to a catalytic distillation column having an upper catalytic zone and a lower catalytic zone and contacting at least a portion of the feedstream in the presence of hydrogen at effective selective hydrotreating and isomerization conditions in the lower catalytic zone containing a selective hydrogenation catalyst and an isomerization catalyst for converting the butadiene to additional amounts of butene-1 and butene-2 and for the isomerization of butene-2 to butene-1 to produce an additional amount of butene-1 and to produce a dimer component and recovering the dimer component in a bottom product stream;b) contacting the remaining portion of the feedstream in the upper catalytic zone containing an etherification catalyst and therein etherifying the isobutylene with the alcohol stream to produce a tertiary alkyl ether;c) recovering a bottom product stream from the catalytic distillation column comprising pentenes, said dimer, and tertiary alkyl ether;d) recovering a top product stream from the catalytic distillation column comprising hydrogen;e) withdrawing a side draw stream at a point above the upper catalytic zone, said side draw stream comprising the alcohol and butene-1; and,f) passing the side draw stream to an alcohol recovery zone to provide a butene-1 product stream and an oxygenate stream and returning at least a portion of the oxygenate stream to step (a) to provide at least a portion of the alcohol stream.